JPS6220259A - Sodium-sulfur battery - Google Patents
Sodium-sulfur batteryInfo
- Publication number
- JPS6220259A JPS6220259A JP60158806A JP15880685A JPS6220259A JP S6220259 A JPS6220259 A JP S6220259A JP 60158806 A JP60158806 A JP 60158806A JP 15880685 A JP15880685 A JP 15880685A JP S6220259 A JPS6220259 A JP S6220259A
- Authority
- JP
- Japan
- Prior art keywords
- sodium
- solid electrolyte
- tube
- felt
- electrolyte tube
- 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
- BNOODXBBXFZASF-UHFFFAOYSA-N [Na].[S] Chemical compound [Na].[S] BNOODXBBXFZASF-UHFFFAOYSA-N 0.000 title claims abstract description 19
- 239000007784 solid electrolyte Substances 0.000 claims abstract description 25
- 239000000835 fiber Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 9
- 239000002184 metal Substances 0.000 claims abstract description 9
- 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 abstract description 11
- 229910052708 sodium Inorganic materials 0.000 abstract description 11
- 239000011734 sodium Substances 0.000 abstract description 11
- FKNQFGJONOIPTF-UHFFFAOYSA-N Sodium cation Chemical compound [Na+] FKNQFGJONOIPTF-UHFFFAOYSA-N 0.000 abstract description 4
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract description 4
- 229910001415 sodium ion Inorganic materials 0.000 abstract description 4
- 239000011593 sulfur Substances 0.000 abstract description 4
- 229910052717 sulfur Inorganic materials 0.000 abstract description 4
- 239000006182 cathode active material Substances 0.000 abstract description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract description 2
- 239000010439 graphite Substances 0.000 abstract description 2
- 239000011148 porous material Substances 0.000 abstract 1
- 230000036647 reaction Effects 0.000 abstract 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 4
- 239000010931 gold Substances 0.000 description 4
- 229910052737 gold Inorganic materials 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 239000006183 anode active material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012856 packing Methods 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
- -1 thickness Substances 0.000 description 1
- 238000003466 welding 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−硫黄電池に関するもので、さらに
詳しく言えばその陰極室の構成に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to sodium-sulfur batteries, and more particularly to the construction of the cathode chamber thereof.
従来技術とその問題点
ナトリウム−硫黄電池は、空気、水分等の影巻を受けな
いように完全密閉された電槽内に、陽極活物質としての
溶融ナトリウムが充填された陽極室と陽極活物質として
の溶融硫黄が充填された陽極室とが設けられ、β′−ア
ルミナの如き固体電解質管により互いに分離されてなる
高温形二次電池である。Conventional technology and its problems A sodium-sulfur battery consists of an anode chamber filled with molten sodium as an anode active material and an anode active material in a completely sealed battery case to prevent exposure to air, moisture, etc. This is a high-temperature secondary battery which is provided with an anode chamber filled with molten sulfur and separated from each other by a solid electrolyte tube such as β'-alumina.
上記の如きナトリウム−硫黄電池の従来例を第４図によ
り説明する。第４図において１はβ′−アルミナの如き
ナトリウムイオン伝導性の固体電解質管で、上端にα−
アルミナリング２がガラス牛田按合されている。さらに
該α−アルミナリング２の上面には、陰極補助金６′が
アル１ニウ五層を介して熱圧接合される一方、前記固体
電解質ｔ１内には、金属繊維７が充填されるとともに陰
極４３が溶接された陰極集電端子管８が挿入され、前記
陰極補助曲３′と陰極壺５とが溶接されて陰極室が構成
される。陰極活物質としての溶融ナトリウムは、釣１５
０°Ｃの保温下において前記陰極集電端子管８の先端よ
り陰極室内に真空含浸されたのち該先端は真空密閉され
る。またａ−アルミナリング２の下問には、ＶＩｈ極蓋
４がアルミニウム層を介して熱圧接合される一方、底西
が嵌合、溶接された耐溶融硫、黄、多硫化ナトリウム性
金属製の電槽５内には、グラファイトフェルト等からな
る陽極活物質としての溶融硫黄を含浸させた陽極寛導材
６が円筒状に収納されるとともに中央の空間に固体電解
質管１が挿入され、電槽５の上端と陽極凶４とが真空中
にて溶接されて陽極室が構成される。A conventional example of the above-mentioned sodium-sulfur battery will be explained with reference to FIG. In Fig. 4, 1 is a solid electrolyte tube made of sodium ion conductive material such as β'-alumina, with an α-
Alumina ring 2 is fitted with glass Ushida. Furthermore, a cathode auxiliary material 6' is heat-pressure bonded to the upper surface of the α-alumina ring 2 through five layers of aluminum, while metal fibers 7 are filled in the solid electrolyte t1, and the cathode 43 is welded to the cathode collector terminal tube 8, and the cathode auxiliary tube 3' and cathode pot 5 are welded to form a cathode chamber. Molten sodium as a cathode active material is
The cathode chamber is impregnated with vacuum from the tip of the cathode current collector terminal tube 8 while being kept at 0.degree. C., and then the tip is vacuum-sealed. In addition, on the bottom of the a-alumina ring 2, the VIh electrode cover 4 is thermo-pressure bonded via an aluminum layer, while the bottom west is fitted and welded with molten sulfur-resistant, yellow, polysulfide sodium metal. In the battery case 5, an anode conductive material 6 made of graphite felt or the like and impregnated with molten sulfur as an anode active material is housed in a cylindrical shape, and a solid electrolyte tube 1 is inserted into the central space. The upper end of the tank 5 and the anode 4 are welded together in a vacuum to form an anode chamber.
このようなナトリウム−硫黄電池において、固体電解質
管１内に充填される金Ｍｍ維７は塊状のステンレスウェ
ブであるため、約３５０℃で放電すると、陰極室内のナ
トリウムは塊状のステンレスウェブの間隙からイオン化
して陽極室に移動するため、固体電解質管１の表面の電
流密度が不均一となってクラッタを発生し、電池を破損
させるという問題点があった。また塊状のステンレスウ
ェブを固体電解質ｔ１に充填する作業は熟紳を娶し、製
造工数が大きくなるという欠点もあった。In such a sodium-sulfur battery, the gold Mm fibers 7 filled in the solid electrolyte tube 1 are lumpy stainless steel webs, so when discharging at about 350°C, the sodium in the cathode chamber is removed from the gaps between the lumpy stainless steel webs. Since the ions are ionized and moved to the anode chamber, the current density on the surface of the solid electrolyte tube 1 becomes non-uniform, causing clutter and damaging the battery. In addition, the work of filling the solid electrolyte t1 with the stainless steel web in the form of a block requires a long process, which also has the disadvantage of increasing the number of manufacturing steps.
発明の目的
本発明は上記欠点を解消するもので、放電時に固体電解
質管の表面の電流密度が不均一にならないようにすると
ともに製造工数を低減させたナトリウム−硫黄電池を提
供することを目的とするものである。Purpose of the Invention The present invention solves the above-mentioned drawbacks, and aims to provide a sodium-sulfur battery that prevents the current density on the surface of the solid electrolyte tube from becoming non-uniform during discharge and reduces the number of manufacturing steps. It is something to do.
発明の構成
本発明のナトリウム−硫黄電池は、固体電解質管内に充
填する金Ｘ＆ｌ！ｉ維をシート状フェルトに成形し、陰
極集電端子管の周囲に配して固体電解質管内に挿入し、
陰極室を構成［７たものである。Structure of the Invention The sodium-sulfur battery of the present invention uses gold X&l! Form the i-fiber into a sheet-like felt, arrange it around the cathode current collector terminal tube, and insert it into the solid electrolyte tube.
This is what constitutes the cathode chamber.
実施例
以下実施例により説明する。第１図は本発明のナトリウ
ム−硫黄電池の陰極室に使用するシート状フェルトを陰
極集電端子管の周囲に配した時の斜視図、第２図はシー
ト状フェルトを陰極集電端子管の周囲に配する時の上面
図、第３図は本発明の他の実施例である。EXAMPLES The present invention will be explained below using examples. Fig. 1 is a perspective view of the sheet-like felt used in the cathode chamber of the sodium-sulfur battery of the present invention arranged around the cathode current collector terminal tube, and Fig. 2 is a perspective view of the sheet-like felt used in the cathode chamber of the sodium-sulfur battery of the present invention arranged around the cathode current collector terminal tube. FIG. 3, a top view when disposed around the device, shows another embodiment of the present invention.
本発明のナシリウムー硫黄電池に使用するシー）状７エ
ルトは９で、繊維径が８μ〜２５μのステンレス５ＵＳ
３１６Ｌを厚みが５鰭となるように成形し、第２図の如
く陰極集電端子管８の凹部８′に端部を溶接略１より固
定し、その主たる繊維方向が固体電解質管１の長さ方向
と垂直にかつ内側が外側より低気孔率となるように巻回
させ、給１図の如き形状のものとする。ここで内側を外
側より低気孔率とするのはナトリウムが含浸されやすく
するためである。この第１図の如き形状のものを固体電
解質管１内に挿入して陰極室を構成する。The sheath type 7 ert used in the sodium sulfur battery of the present invention is 9, made of stainless steel 5US with a fiber diameter of 8μ to 25μ.
316L is formed to have a thickness of 5 fins, and its end is fixed to the recess 8' of the cathode current collector terminal tube 8 by welding approximately 1 as shown in FIG. It is wound perpendicularly to the width direction so that the inner side has a lower porosity than the outer side, and the shape is as shown in Figure 1. The reason why the inner side is made to have a lower porosity than the outside is to facilitate impregnation with sodium. This shape as shown in FIG. 1 is inserted into the solid electrolyte tube 1 to form a cathode chamber.
この時巻回したシート状フェルトの外径を固体電解質管
の内径より大とすれば密着性が良好になる。At this time, if the outer diameter of the wound sheet-like felt is larger than the inner diameter of the solid electrolyte tube, good adhesion can be achieved.
次に第３図はシート状フェルトの主たる繊維方向が異な
るように陰極集電端子管８の周囲に配したもので、内側
に配したシート状フェルト９−１の主たる繊維方向は固
体電解質管１の長さ方向と平行にし、外側に配したシー
ト状フェル）９−２の主たる繊維方向は固体電解質管１
の長さ方向と垂直にしている。Next, in FIG. 3, the sheet-like felt is arranged around the cathode current collector terminal tube 8 so that the main fiber direction is different, and the main fiber direction of the sheet-like felt 9-1 arranged inside is the solid electrolyte tube 1. The main fiber direction of the sheet-like fer (9-2) parallel to the length direction of the solid electrolyte tube 1
It is perpendicular to the length direction.
このように構成すれば、陰極集電端子管８の先端から溶
融ナトリウムを真空含浸させる時、短時間で全体に分布
させることができる。With this configuration, when vacuum impregnating the tip of the cathode current collector terminal tube 8 with molten sodium, it can be distributed throughout the entire cathode in a short time.
今、第１図の如き形状のものを固体電解質管１内に挿入
してなる本発明電池と、第４図の如き従来電池とについ
て、放電末において ６一
シート状７エルト９、金属ｍＡ１１７に残存−ｆるナト
リウムの分布と、金に４繊維の充填作業時間を比較した
。その結果放電末において残存するナトリウムは、従来
電池では金属繊維７の下部にナトリウムが多く分布し、
−Ｌ部にはす） ＩＪウムの欠乏筒所が紹められたのに
対し、本発明電池では均一に分布していた。また金Ｘ線
雑の充填作業時間は、従来電池では１セル当り５分〜１
５分で個人差があったのに対し、本発明電池では１七ル
当り１分〜２分であった。さらにナトリウムの電池反応
への寄与率は、従来電池が８０％であったのに対し、本
発明電池では９０〜９５％であった。Now, regarding the battery of the present invention in which the shape as shown in FIG. 1 is inserted into the solid electrolyte tube 1 and the conventional battery as shown in FIG. The distribution of residual sodium and the filling operation time of four fibers in gold were compared. As a result, in conventional batteries, the remaining sodium at the end of discharge is mostly distributed under the metal fibers 7.
- In the L part) In contrast to the IJum depletion region, it was uniformly distributed in the battery of the present invention. Furthermore, the filling time for gold X-ray miscellaneous is 5 minutes to 1 hour per cell for conventional batteries.
While there were individual differences in the time taken for 5 minutes, the time for the battery of the present invention was 1 to 2 minutes per 17 liters. Furthermore, the contribution rate of sodium to the battery reaction was 80% in the conventional battery, whereas it was 90 to 95% in the battery of the present invention.
以上の実施例においてシート状フェルトに成形された金
属繊維の材質、厚み、繊維径、密度、巻回させた時の気
孔率および固体電解質管内へのシート状フェルトの充填
密度については特に限定するものではない。In the above examples, there are no particular limitations on the material, thickness, fiber diameter, density, porosity of the metal fiber formed into the sheet-like felt, porosity when wound, and packing density of the sheet-like felt into the solid electrolyte tube. isn't it.
発明の効果
実施例において詳述した如く、本発明のナトリウム−硫
黄電池は、製造］二数を低減させることができるととも
に陰極活物質としてのナトリウムの電池反応への寄与率
を高め、かつ均一な反応を行なわしめ、電流密度も均一
にすることができる。Effects of the Invention As described in detail in the Examples, the sodium-sulfur battery of the present invention can reduce the manufacturing cost, increase the contribution rate of sodium as a cathode active material to the battery reaction, and produce a uniform battery. The reaction can be carried out and the current density can be made uniform.
第１図は本以明のナトリウム−硫黄電池ノ陰極寵に使用
するシート状フェルトを陰極集電端子管の周囲に配した
時の斜視図、第２図はシート状フェルトを陰極集電端子
管の周囲に配する時の上面図、納３図は本発明の他の実
施例におけるシート状フェルトを陰極集電端子管の周囲
に配した時の斜視図、第４図は従来のナトリウム−硫黄
電池の断面図である。Figure 1 is a perspective view of the sheet-like felt used for the cathode of the sodium-sulfur battery of the present invention arranged around the cathode current collector terminal tube, and Figure 2 is a perspective view of the sheet-like felt used for the cathode of the sodium-sulfur battery according to the present invention arranged around the cathode current collector terminal tube. Fig. 3 is a top view when the sheet-like felt according to another embodiment of the present invention is arranged around the cathode current collector terminal tube. It is a sectional view of a battery.
Claims (4)
た金属繊維にナトリウムを含浸させてなる陰極室を備え
たナトリウム−硫黄電池において、金属繊維をシート状
フェルトに成形し、陰極集電端子管の周囲に配して固体
電解質管内に挿入したことを特徴とするナトリウム−硫
黄電池。(1) In a sodium-sulfur battery equipped with a cathode chamber made by impregnating sodium-ion-conducting solid electrolyte tube with metal fibers, the metal fibers are formed into a sheet-like felt and the metal fibers are formed around the cathode current collector terminal tube. A sodium-sulfur battery characterized in that it is arranged in a solid electrolyte tube and inserted into a solid electrolyte tube.
トの主たる繊維方向は、固体電解質管の長さ方向に対し
て内側では平行、外側では垂直であることを特徴とする
特許請求の範囲第１項記載のナトリウム−硫黄電池。(2) The main fiber direction of the sheet-like felt wound around the cathode current collector terminal tube is parallel to the length direction of the solid electrolyte tube on the inside and perpendicular on the outside. A sodium-sulfur battery according to scope 1.
トは、内側を外側より低気孔率にしていることを特徴と
する特許請求の範囲第１項記載のナトリウム−硫黄電池
。(3) The sodium-sulfur battery according to claim 1, wherein the sheet-like felt wound around the cathode current collector terminal tube has a lower porosity on the inside than on the outside.
トの外径は、固体電解質管の内径より大であることを特
徴とする特許請求の範囲第１項記載のナトリウム−硫黄
電池。(4) The sodium-sulfur battery according to claim 1, wherein the outer diameter of the sheet-like felt wound around the cathode current collector terminal tube is larger than the inner diameter of the solid electrolyte tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60158806A JPS6220259A (en) | 1985-07-18 | 1985-07-18 | Sodium-sulfur battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60158806A JPS6220259A (en) | 1985-07-18 | 1985-07-18 | Sodium-sulfur battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6220259A true JPS6220259A (en) | 1987-01-28 |
Family
ID=15679763
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60158806A Pending JPS6220259A (en) | 1985-07-18 | 1985-07-18 | Sodium-sulfur battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6220259A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6288281A (en) * | 1985-10-15 | 1987-04-22 | Tokyo Electric Power Co Inc:The | Sodium-sulfur cell |
| JPH03145069A (en) * | 1989-10-27 | 1991-06-20 | Ngk Insulators Ltd | Sodium-sulfur battery |
| JPH04333529A (en) * | 1991-05-07 | 1992-11-20 | Nippon Steel Corp | Cooling device for strip continuous heat treatment equipment |
| US5658601A (en) * | 1993-03-02 | 1997-08-19 | Kabushiki Kaisha Hoshi Plastic | Machine for cutting strand |
| JP2015005517A (en) * | 2013-06-20 | 2015-01-08 | エスケー イノベーション カンパニー リミテッドＳｋ Ｉｎｎｏｖａｔｉｏｎ Ｃｏ．，Ｌｔｄ． | Sodium secondary battery including graphite felt |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5353736A (en) * | 1976-10-22 | 1978-05-16 | Comp Generale Electricite | Battery |
| JPS5478435A (en) * | 1977-12-05 | 1979-06-22 | Yuasa Battery Co Ltd | Sodiummsulfer cell |
| JPS5485333A (en) * | 1977-12-19 | 1979-07-06 | Yuasa Battery Co Ltd | Sodiummsulfur cell |
| JPS5497736A (en) * | 1978-01-18 | 1979-08-02 | Yuasa Battery Co Ltd | Sodiummsulfer cell |
-
1985
- 1985-07-18 JP JP60158806A patent/JPS6220259A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5353736A (en) * | 1976-10-22 | 1978-05-16 | Comp Generale Electricite | Battery |
| JPS5478435A (en) * | 1977-12-05 | 1979-06-22 | Yuasa Battery Co Ltd | Sodiummsulfer cell |
| JPS5485333A (en) * | 1977-12-19 | 1979-07-06 | Yuasa Battery Co Ltd | Sodiummsulfur cell |
| JPS5497736A (en) * | 1978-01-18 | 1979-08-02 | Yuasa Battery Co Ltd | Sodiummsulfer cell |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6288281A (en) * | 1985-10-15 | 1987-04-22 | Tokyo Electric Power Co Inc:The | Sodium-sulfur cell |
| JPH03145069A (en) * | 1989-10-27 | 1991-06-20 | Ngk Insulators Ltd | Sodium-sulfur battery |
| JPH04333529A (en) * | 1991-05-07 | 1992-11-20 | Nippon Steel Corp | Cooling device for strip continuous heat treatment equipment |
| US5658601A (en) * | 1993-03-02 | 1997-08-19 | Kabushiki Kaisha Hoshi Plastic | Machine for cutting strand |
| JP2015005517A (en) * | 2013-06-20 | 2015-01-08 | エスケー イノベーション カンパニー リミテッドＳｋ Ｉｎｎｏｖａｔｉｏｎ Ｃｏ．，Ｌｔｄ． | Sodium secondary battery including graphite felt |
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