JPH01253170A - Sodium-surfur battery - Google Patents
Sodium-surfur batteryInfo
- Publication number
- JPH01253170A JPH01253170A JP63080521A JP8052188A JPH01253170A JP H01253170 A JPH01253170 A JP H01253170A JP 63080521 A JP63080521 A JP 63080521A JP 8052188 A JP8052188 A JP 8052188A JP H01253170 A JPH01253170 A JP H01253170A
- Authority
- JP
- Japan
- Prior art keywords
- anode
- sodium
- conductive material
- battery
- specific surface
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004020 conductor Substances 0.000 claims abstract description 33
- 239000011734 sodium Substances 0.000 claims abstract description 15
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 claims abstract description 10
- 229910052708 sodium Inorganic materials 0.000 claims abstract description 10
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 claims description 19
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 claims description 14
- 229910052717 sulfur Inorganic materials 0.000 claims description 14
- 239000011593 sulfur Substances 0.000 claims description 14
- 239000007784 solid electrolyte Substances 0.000 claims description 12
- 239000013543 active substance Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 abstract description 9
- 239000002184 metal Substances 0.000 abstract description 9
- 239000002994 raw material Substances 0.000 abstract description 6
- 239000003575 carbonaceous material Substances 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 238000007599 discharging Methods 0.000 description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 229910001415 sodium ion Inorganic materials 0.000 description 3
- HYHCSLBZRBJJCH-UHFFFAOYSA-N sodium polysulfide Chemical compound [Na+].S HYHCSLBZRBJJCH-UHFFFAOYSA-N 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- OLPXIHXXKBDZES-UHFFFAOYSA-L 37488-76-9 Chemical compound [Na+].[Na+].[S-]S[S-] OLPXIHXXKBDZES-UHFFFAOYSA-L 0.000 description 1
- 229910000873 Beta-alumina solid electrolyte Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000011149 active material Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920001021 polysulfide Polymers 0.000 description 1
- 239000005077 polysulfide Substances 0.000 description 1
- 150000008117 polysulfides Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007086 side reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/36—Accumulators not provided for in groups H01M10/05-H01M10/34
- H01M10/39—Accumulators not provided for in groups H01M10/05-H01M10/34 working at high temperature
- H01M10/3909—Sodium-sulfur cells
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明はナトリウム−硫黄電池に関し、さらに詳しくは
陽極容器内に収容され、かつ充電及び放電を効率的に行
う機能を有する陽極用導電材の比表面積からみた新規な
構造に関するものである。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a sodium-sulfur battery, and more particularly to a conductive material for an anode that is housed in an anode container and has the function of efficiently charging and discharging. It concerns a new structure from the perspective of specific surface area.
（従来の技術）
最近、電気自動車用、夜間電力貯蔵用の二次電池として
性能面及び経済面の両面において優れている高温型のナ
トリウム−硫黄電池の研究開発が進められている。(Prior Art) Recently, research and development has been progressing on high-temperature sodium-sulfur batteries that are excellent in both performance and economical aspects as secondary batteries for electric vehicles and nighttime power storage.
即ち、性能面では、ナトリウム−硫黄電池は鉛蓄電池に
比べて理論エネルギー密度が高く、充放電時における水
素や酸素の発生といった副反応もな（、活物質の利用率
も高く、経済面ではナトリウム及び硫黄が安価であると
いう利点を有している。In other words, in terms of performance, sodium-sulfur batteries have a higher theoretical energy density than lead-acid batteries, do not cause side reactions such as the generation of hydrogen and oxygen during charging and discharging (and have a high utilization rate of active materials, and are economically superior to sodium-sulfur batteries). It also has the advantage that sulfur is cheap.
従来のナトリウム−硫黄電池は、第５図に示すように下
部に陽極端子１を備え、陽極作用物質である溶融硫黄を
含浸したカーボンマント等の陽極用導電材Ｍを収納する
円筒状の陽極界２Ｓ２と、該陽極容器２の上端部に対し
、α−アルミナ製の絶縁リング３を介して連結され、か
つ溶融金属ナトリウムＮａを貯留する陰極容器４と、前
記絶縁すング３の内周部に固着され、かつ陰極作用物質
であるナトリウムイオンを選択的に透過させる機能を有
した下方へ延びる円筒状の袋管を形成するβ−アルミナ
製の固体電解質管５とからなっている。As shown in FIG. 5, a conventional sodium-sulfur battery has an anode terminal 1 at the bottom, and a cylindrical anode field that houses a conductive material M for the anode, such as a carbon cloak impregnated with molten sulfur, which is an anode active substance. 2S2, a cathode container 4 connected to the upper end of the anode container 2 via an insulating ring 3 made of α-alumina and storing molten metal Na, and an inner peripheral portion of the insulating ring 3. It consists of a solid electrolyte tube 5 made of .beta.-alumina which forms a downwardly extending cylindrical bag tube which has a function of selectively permeating sodium ions, which are a cathode active substance.
又、陰極容器４の上部蓋の中央部には、該陰極容器４を
通して固体電解質管５底部まで延びた細長い陰極管６が
貫通支持され、該陰極管６の上端部には、陰極端子７が
固着されている。In addition, an elongated cathode tube 6 extending through the cathode container 4 to the bottom of the solid electrolyte tube 5 is supported through the center of the upper lid of the cathode container 4, and a cathode terminal 7 is provided at the upper end of the cathode tube 6. It is fixed.
そして、放電時には次のような反応によってナトリウム
イオンが固体電解質管５を透過して陽極容器２内の硫黄
と反応し、多硫化ナトリウムを生成する。During discharging, sodium ions pass through the solid electrolyte tube 5 and react with sulfur in the anode container 2 to produce sodium polysulfide through the following reaction.
２Ｎａ ＋ＸＳ−”Ｎａｚ Ｓ ｘ
又、充電時には放電時とは逆の反応が起こり、ナトリウ
ム及び硫黄が生成される。2Na +XS-"Naz S x Also, during charging, a reaction opposite to that during discharging occurs, and sodium and sulfur are generated.
上記のようなナトリウム−硫黄電池の陽極容器２内の陽
極用導電材Ｍに含浸された硫黄には電子伝導性がないた
め、該陽極用導電材Ｍを多孔質として電子伝導性を付与
している。この陽極用導電材Ｍは全体が一定の比表面積
、つまり０．６〜１６５ｎｆ／ｇとなるように形成され
ていた。この比表面積は陽極用導電材Ｍの全表面積（ｒ
ｄ）を、該陽極用導電材Ｍの全型１ （ｇ）で除したも
のである。Since the sulfur impregnated into the anode conductive material M in the anode container 2 of the sodium-sulfur battery as described above does not have electronic conductivity, the anode conductive material M is made porous to impart electron conductivity. There is. This anode conductive material M was formed so as to have a constant specific surface area as a whole, that is, 0.6 to 165 nf/g. This specific surface area is the total surface area (r
d) divided by the total type 1 (g) of the conductive material M for anode.
（発明が解決しようとする課題）
前述したように、従来のナトリウム−硫黄電池の陽極用
導電材Ｍは全体が小さい値の同じ比表面積で形成されて
いるので、充電時に陽極用導電材Ｍの内側部に硫黄が残
留し、この結果、充電受入率（以下単に充電時間という
）が低下して電池容量（電流容量で以下単にアンペアア
ワー又はＡｈともいう）が低下するという問題が実験に
より確認された。この理由は導電材Ｍ全体が均一な比表
面積の場合、陽極容器２内の電気化学反応が半径方向で
不均等となり、反応生成物組性が変化し、特に充電時に
早い機会にβ−アルミナよりなる固体電解質管５の表面
に電気抵抗の高い硫黄もしくは硫黄含有率の高い多硫化
す） ＩＪウムが生成し、分極が高くなるためであると
考えられる。(Problem to be Solved by the Invention) As mentioned above, since the conductive material M for the anode of the conventional sodium-sulfur battery is formed with the same specific surface area with a small value as a whole, the conductive material M for the anode during charging. Experiments have confirmed that sulfur remains inside the battery, resulting in a decrease in charge acceptance rate (hereinafter simply referred to as charging time) and a decrease in battery capacity (current capacity, hereinafter simply referred to as ampere hour or Ah). Ta. The reason for this is that when the entire conductive material M has a uniform specific surface area, the electrochemical reaction inside the anode container 2 becomes uneven in the radial direction, and the composition of the reaction products changes. This is thought to be due to the formation of sulfur with high electrical resistance or polysulfide with high sulfur content on the surface of the solid electrolyte tube 5, resulting in high polarization.
本発明の目的は充電時間を長く電池容量を向上すること
ができるとともに、陽極用導電材を構成する原料の比表
面積を尺度として原料の段階で電池の品質、つまり電池
容量を管理することができるナトリウム−硫黄電池を提
供することにある。The purpose of the present invention is to extend the charging time and improve the battery capacity, and also to control the quality of the battery, that is, the battery capacity, at the raw material stage using the specific surface area of the raw material constituting the conductive material for the anode as a measure. An object of the present invention is to provide a sodium-sulfur battery.
（課題を解決するための手段）
本発明は前記目的を達成するために、陽極作用物質の硫
黄を含浸する中空状の陽極用導電材を収納する陽極容器
に絶縁リングを接合固定し、該絶縁リングにはナトリウ
ムを貯留する陰極容器を設け、前記陽極用導電材の中空
部には端部を前記絶縁リングに接合固定した固体電解質
管を挿入したナトリウム−硫黄電池において、
前記陽極用導電材の内層の比表面積を１ｏｒｒｆ／ｇ以
上に設定し、陽極用導電材の外層の比表面積を１０ｒｒ
ｆ／ｇ以下に設定するという構成を採用している。(Means for Solving the Problems) In order to achieve the above object, the present invention has an insulating ring bonded and fixed to an anode container housing a hollow anode conductive material impregnated with sulfur as an anode active substance, and the insulating ring In a sodium-sulfur battery, the ring is provided with a cathode container for storing sodium, and a solid electrolyte tube whose end is fixed to the insulating ring is inserted into the hollow part of the anode conductive material. The specific surface area of the inner layer is set to 1 orrf/g or more, and the specific surface area of the outer layer of the conductive material for the anode is set to 10rr.
A configuration is adopted in which the value is set below f/g.
（作用）
上記構成を採用したことにより、充電時に陰極容器内の
溶融金属ナトリウムが陽極用導電材の内層から外層に向
かって、円滑に移行され、陽極用導電材の内層に硫黄が
滞留することはなく、従って、内層における分極を防止
して充電時間を長くでき、電池容量を大きくすることが
できる。(Function) By adopting the above configuration, the molten metal sodium in the cathode container is smoothly transferred from the inner layer of the anode conductive material toward the outer layer during charging, and sulfur is retained in the inner layer of the anode conductive material. Therefore, polarization in the inner layer can be prevented, charging time can be lengthened, and battery capacity can be increased.
（実施例）
次に、本発明を具体化した一実施例を第１図〜第４図を
用いて説明する。(Example) Next, an example embodying the present invention will be described with reference to FIGS. 1 to 4.
この実施例のナトリウム−硫黄電池は、後述する特徴的
部分、つまり陽極用導電材Ｍの構造を除いて、前述した
従来のナトリウム−硫黄電池と構成が同じである。すな
わち、この実施例のナトリウム−硫黄電池も、第１図に
示すように下部に陽極端子１を備えた陽極用導電材Ｍを
貯留する円筒状の陽極容器２と、該陽極容器２の上端部
に対し、α−アルミナ製の絶縁リング３を介して連結さ
れ、かつ熔融金属ナトリウムＮａを貯留する陰極容器４
と、前記絶縁リング３の内周部に固着されβ−アルミナ
製の固体電解質管５と、陰極端子７を備えた陰極管６と
により構成されている。The sodium-sulfur battery of this embodiment has the same structure as the conventional sodium-sulfur battery described above, except for the characteristic parts described below, that is, the structure of the conductive material M for the anode. That is, as shown in FIG. 1, the sodium-sulfur battery of this embodiment also includes a cylindrical anode container 2 for storing an anode conductive material M having an anode terminal 1 at the bottom thereof, and an upper end portion of the anode container 2. In contrast, a cathode container 4 is connected via an insulating ring 3 made of α-alumina and stores molten metal sodium Na.
, a solid electrolyte tube 5 made of β-alumina and fixed to the inner circumference of the insulating ring 3, and a cathode tube 6 provided with a cathode terminal 7.
従って、電池の充電時には溶融金属ナトリウムはナトリ
ウムイオンとなって固体電解質管５を透過し、陽極容器
２及び固体電解質管５で区画形成された陽極用導電材Ｍ
の収容空間に入り、そこで前述した反応式に基づいて硫
黄と反応し多硫化ナトリウム、特に最終的には三硫化ナ
トリウムを生成する。Therefore, when charging the battery, molten metal sodium becomes sodium ions and passes through the solid electrolyte tube 5, and the anode conductive material M defined by the anode container 2 and the solid electrolyte tube 5
There, it reacts with sulfur based on the reaction formula described above to produce sodium polysulfide, particularly sodium trisulfide.
さて、本発明のナトリウム−硫黄電池の特徴的部分は、
第１図及び第２図に示すように陽極容器２の内部に収納
した例えば黒鉛質繊維（グラファイト径繊維）あるいは
カーボン繊維やフェルト等の炭素質繊維等の炭素質多孔
質材料よりなる陽極゛用導電材Ｍを比表面積の異なる内
層Ｍ１と外層Ｍ２の二層構造としている点である。この
実施例では前記内層ＭｌＯ比表面積Ｓ１を、１０％／ｇ
以上とし、その厚さｔｌを０．２〜１龍としている。Now, the characteristic parts of the sodium-sulfur battery of the present invention are as follows:
As shown in FIGS. 1 and 2, an anode made of a carbonaceous porous material such as graphite fiber (graphite diameter fiber) or carbonaceous fiber such as carbon fiber or felt is housed inside the anode container 2. The point is that the conductive material M has a two-layer structure of an inner layer M1 and an outer layer M2 having different specific surface areas. In this example, the inner layer MlO specific surface area S1 is 10%/g
Above, the thickness tl is set to 0.2 to 1.
又、前記外層Ｍ２の比表面積Ｓ２を、１０ｎｆ／ｇ以下
とし、厚さｔ２を３．０〜１５、Ｏｌｍとしている。Further, the specific surface area S2 of the outer layer M2 is set to 10 nf/g or less, and the thickness t2 is set to 3.0 to 15 olm.
従って、本発明実施例では、充電時に陰極容器４内の溶
融金属ナトリウムＮａが固体電解質管５を浸透して陽極
用導電材Ｍの比表面積Ｓ１の大きい内層Ｍ１に至り、さ
らに比表面積Ｓ２の小さい外層Ｍ２に浸透するので、実
験的に確認した結果、次の表に示すように充電時間が長
時間となり、電池容量（アンペアアワーＡｈ）が増大し
た。Therefore, in the embodiment of the present invention, during charging, molten metal sodium Na in the cathode container 4 penetrates the solid electrolyte tube 5 and reaches the inner layer M1 of the anode conductive material M having a large specific surface area S1, and furthermore, the molten metal Na in the cathode container 4 penetrates the solid electrolyte tube 5 and reaches the inner layer M1 having a large specific surface area S1 of the anode conductive material M. Since it penetrated into the outer layer M2, it was experimentally confirmed that the charging time became longer and the battery capacity (ampere hours Ah) increased as shown in the following table.
表
（比表面積Ｓ１．Ｓ２の単位はｒｒｆ ／ ｇ ）この
実施例では上表に示すように、内層Ｍ１の比表面積を■
〜■の五段階に、核層Ｍ２の比表面積を１．２．５．１
０ｒｒｒ／ｇの四段階に区別して実験したところ、電池
の設計容量が５６Ａｈの場合、前述したように内層Ｍｌ
の比表面積がＬｏｒｄ／ｇ以上で、外層Ｍ２の比表面積
は、１０ｒｄ／ｇ以下、望ましくは５ ｒｄ ／ ｇ以
下であると、良好な結果が得られることがわかった。Table (The unit of specific surface area S1.S2 is rrf/g) In this example, as shown in the table above, the specific surface area of inner layer M1 is
In the five stages of ~ ■, the specific surface area of the nuclear layer M2 is 1.2.5.1
When the experiment was conducted in four stages of 0rrr/g, it was found that when the design capacity of the battery was 56Ah, the inner layer Ml
It has been found that good results can be obtained when the specific surface area of the outer layer M2 is 10 rd/g or less, preferably 5 rd/g or less.
上記表の■〜■の各実施例について、電池容量（Ａｈ）
と電圧（Ｖ）との関係をグラフ化したところ、第３図の
ようになった。この結果から電池容量が５６Ａｈでは■
〜■の実施例が設計容量に適合することがわかる。For each example from ■ to ■ in the table above, battery capacity (Ah)
When I graphed the relationship between the voltage and the voltage (V), the result was as shown in Figure 3. From this result, if the battery capacity is 56Ah,
It can be seen that the examples of ~■ correspond to the design capacity.
ところで、第４図は内層Ｍ１の厚さｔｌと電池の内部抵
抗（ｍΩ）との関係を表す、これによれば、小型の電池
では陽極用導電材Ｍ全体の厚みｔを７．５Ｎ、として内
層Ｍｌの厚みｔｌを大きくしていくと、電池の内部抵抗
が増大することがわかる。又、大型の電池（２５Ａｈ）
では陽極用導電材Ｍの厚みｔを９．０鶴として、内層Ｍ
１の厚みｔｌを増大すると、電池の内部抵抗は小型の電
池よりも低い値で電池の内部抵抗が直線的に増大してい
くことがわかる。上記構造により内層における電気抵抗
の高い硫黄もしくは硫黄含有率の高い多硫化ナトリウム
の生成が防がれる反面、内層を厚くしすぎるとこの部分
を未反応の熔融金属ナトリウムが移行する距離が長くな
り、内層の内・外面間を溶融金属ナトリウムが移行する
のに必要な電位差が大きくなることにより電池の内部抵
抗が上昇する。By the way, FIG. 4 shows the relationship between the thickness tl of the inner layer M1 and the internal resistance (mΩ) of the battery. According to this, in a small battery, assuming that the overall thickness t of the anode conductive material M is 7.5N, It can be seen that as the thickness tl of the inner layer Ml increases, the internal resistance of the battery increases. Also, a large battery (25Ah)
In this case, the thickness t of the conductive material M for the anode is 9.0 mm, and the inner layer M
It can be seen that when the thickness tl of 1 is increased, the internal resistance of the battery increases linearly with a value lower than that of a small battery. Although the above structure prevents the formation of sulfur with high electrical resistance or sodium polysulfide with high sulfur content in the inner layer, if the inner layer is made too thick, the distance through which unreacted molten metal sodium will migrate will become longer. The internal resistance of the battery increases due to the increased potential difference required for the transfer of molten metal sodium between the inner and outer surfaces of the inner layer.
なお、本発明のナトリウム−硫黄電池は上記実施例に限
らず、陽極用導電材Ｍの構造を三層構造以上の多層構造
としたり、内層から外層にかけて連続的に比表面積が急
減するようにしたり、その他図示しないが、特許請求の
範囲の範囲内において、構成を任意に変更して具体化す
ることもできる。Note that the sodium-sulfur battery of the present invention is not limited to the above embodiments, and the structure of the conductive material M for the anode may be a multilayer structure of three or more layers, or the specific surface area may be made to rapidly decrease continuously from the inner layer to the outer layer. Although not shown in the drawings, the configuration can be modified and implemented as desired within the scope of the claims.
（発明の効果）
本発明のナトリウム−硫黄電池は、充電時間を長く電池
容量を向上することができるとともに、陽極用導電材を
構成する原料の比表面積を尺度として原料の段階で電池
の品質、つまり電池容量を管理することができる効果が
ある。(Effects of the Invention) The sodium-sulfur battery of the present invention can extend the charging time and improve the battery capacity, and the quality of the battery can be determined at the raw material stage using the specific surface area of the raw material constituting the anode conductive material as a measure. In other words, there is an effect that the battery capacity can be managed.
第１図は本発明のナトリウム−硫黄電池の一実施例を示
す部縦断面図、第２図は第１図のＡ−Ａ線断面図、第３
図は電池容量と電圧との関係を示すグラフ、第４図は内
層の厚さと内部抵抗との関係を示すグラフ、第５図は従
来のナトリウム−硫黄電池の縦断面図である。
■・・・陽極端子、２・・・陽極容器、３・・・絶縁リ
ング、４・・・陰極容器、５・・・固体電解質管、６・
・・陰極管、７・・・陰極端子、Ｍ・・・陽極用導電材
、Ｍｌ・・・内層、Ｍ２・・・外層、Ｓｌ・・・内層の
比表面積、Ｓ２・・・外層の比表面積。FIG. 1 is a longitudinal cross-sectional view of an embodiment of the sodium-sulfur battery of the present invention, FIG. 2 is a cross-sectional view taken along line A-A in FIG.
FIG. 4 is a graph showing the relationship between battery capacity and voltage, FIG. 4 is a graph showing the relationship between inner layer thickness and internal resistance, and FIG. 5 is a longitudinal cross-sectional view of a conventional sodium-sulfur battery. ■... Anode terminal, 2... Anode container, 3... Insulating ring, 4... Cathode container, 5... Solid electrolyte tube, 6...
... Cathode tube, 7... Cathode terminal, M... Conductive material for anode, Ml... Inner layer, M2... Outer layer, Sl... Specific surface area of inner layer, S2... Specific surface area of outer layer. .
Claims (1)
材（Ｍ）を収納する陽極容器（２）に絶縁リング（３）
を接合固定し、該絶縁リング（３）にはナトリウムを貯
留する陰極容器（４）を設け、前記陽極用導電材（Ｍ）
の中空部には端部を前記絶縁リング（３）に接合固定し
た固体電解質管（５）を挿入したナトリウム−硫黄電池
において、前記陽極用導電材（Ｍ）の内層（Ｍ１）の比
表面積を１０ｍ＾２／ｇ以上に設定し、陽極用導電材（
Ｍ）の外層（Ｍ２）の比表面積を１０ｍ＾２／ｇ以下に
設定したことを特徴とするナトリウム−硫黄電池。1. An insulating ring (3) is placed in the anode container (2) that houses the hollow anode conductive material (M) impregnated with sulfur, which is an anode active substance.
are bonded and fixed, the insulating ring (3) is provided with a cathode container (4) for storing sodium, and the anode conductive material (M)
In a sodium-sulfur battery in which a solid electrolyte tube (5) whose end is bonded and fixed to the insulating ring (3) is inserted into the hollow part, the specific surface area of the inner layer (M1) of the anode conductive material (M) is Set at 10m^2/g or more, conductive material for anode (
A sodium-sulfur battery characterized in that the outer layer (M2) of M) has a specific surface area of 10 m^2/g or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63080521A JPH01253170A (en) | 1988-03-31 | 1988-03-31 | Sodium-surfur battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63080521A JPH01253170A (en) | 1988-03-31 | 1988-03-31 | Sodium-surfur battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01253170A true JPH01253170A (en) | 1989-10-09 |
Family
ID=13720616
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63080521A Pending JPH01253170A (en) | 1988-03-31 | 1988-03-31 | Sodium-surfur battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01253170A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6095864A (en) * | 1983-10-28 | 1985-05-29 | Hitachi Ltd | Sodium-sulfur battery |
-
1988
- 1988-03-31 JP JP63080521A patent/JPH01253170A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6095864A (en) * | 1983-10-28 | 1985-05-29 | Hitachi Ltd | Sodium-sulfur battery |
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