JP2007242590A5 - - Google Patents

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JP2007242590A5
JP2007242590A5 JP2006285599A JP2006285599A JP2007242590A5 JP 2007242590 A5 JP2007242590 A5 JP 2007242590A5 JP 2006285599 A JP2006285599 A JP 2006285599A JP 2006285599 A JP2006285599 A JP 2006285599A JP 2007242590 A5 JP2007242590 A5 JP 2007242590A5
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negative electrode
secondary battery
mixture layer
electrode mixture
battery according
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JP5008180B2 (en
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正極、負極および非水電解質を備えた非水二次電池であって、
上記正極は、Ｌｉ含有遷移金属酸化物を含有する正極合剤層を有しており、
上記負極は、ＳｉとＯを構成元素に含む化合物（ただし、Ｓｉに対するＯの原子比ｘは、０．５≦ｘ≦１．５である）を含むコアとその表面を被覆する炭素の被覆層とで構成された負極材料を含有する負極合剤層と、該負極合剤層上に形成された、Ｌｉと反応しない絶縁性の材料を含有する多孔質層を有しており、
上記ＳｉとＯを構成元素に含む化合物は、電池の放電終了状態において、ＳｉのＫ吸収端のＸ線吸収端近傍構造スペクトルにおける少なくとも１８５０〜１８６０ｅＶの範囲にピークを有することを特徴とする非水二次電池。 A non-aqueous secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte,
The positive electrode has a positive electrode mixture layer containing a Li-containing transition metal oxide,
The negative electrode includes a core containing a compound containing Si and O as constituent elements (however, the atomic ratio x of O to Si is 0.5 ≦ x ≦ 1.5) and a carbon coating layer covering the surface thereof And a negative electrode mixture layer containing a negative electrode material, and a porous layer formed on the negative electrode mixture layer and containing an insulating material that does not react with Li,
The compound containing Si and O as constituent elements has a peak in the range of at least 1850 to 1860 eV in the structure spectrum near the X-ray absorption edge of the K absorption edge of Si in the discharge end state of the battery. Secondary battery. 正極、負極および非水電解質を備えた非水二次電池であって、
上記正極は、Ｌｉ含有遷移金属酸化物を含有する正極合剤層を有しており、
上記負極は、ＳｉとＯを構成元素に含む化合物（ただし、Ｓｉに対するＯの原子比ｘは、０．５≦ｘ≦１．５である）を含むコアとその表面を被覆する炭素の被覆層とで構成された負極材料を含有する負極合剤層と、該負極合剤層上に形成された、Ｌｉと反応しない絶縁性の材料を含有する多孔質層を有しており、
上記ＳｉとＯを構成元素に含む化合物は、電池の放電終了状態において、Ｓｉに対する原子比で０．８〜２．４倍のＬｉを含有していることを特徴とする非水二次電池。 A non-aqueous secondary battery comprising a positive electrode, a negative electrode and a non-aqueous electrolyte,
The positive electrode has a positive electrode mixture layer containing a Li-containing transition metal oxide,
The negative electrode includes a core containing a compound containing Si and O as constituent elements (however, the atomic ratio x of O to Si is 0.5 ≦ x ≦ 1.5) and a carbon coating layer covering the surface thereof And a negative electrode mixture layer containing a negative electrode material, and a porous layer formed on the negative electrode mixture layer and containing an insulating material that does not react with Li,
The non-aqueous secondary battery characterized in that the compound containing Si and O as constituent elements contains Li in an atomic ratio of 0.8 to 2.4 times that of Si in a discharge end state of the battery. 前記ＳｉとＯを構成元素に含む化合物が、Ｓｉの微結晶相または非晶質相を含む請求項１または２に記載の非水二次電池。   The nonaqueous secondary battery according to claim 1, wherein the compound containing Si and O as constituent elements includes a microcrystalline phase or an amorphous phase of Si. 前記多孔質層が、前記絶縁性の材料とともに電子伝導性の材料を含有することを特徴とする請求項１〜３のいずれかに記載の非水二次電池。   The non-aqueous secondary battery according to claim 1, wherein the porous layer contains an electron conductive material together with the insulating material. 前記絶縁性の材料が酸化アルミニウムまたはベーマイトであり、前記電子伝導性の材料が炭素材料である請求項４に記載の非水二次電池。   The nonaqueous secondary battery according to claim 4, wherein the insulating material is aluminum oxide or boehmite, and the electron conductive material is a carbon material. 前記炭素の被覆層が、炭化水素系ガスの熱分解により生じたものである請求項１〜５のいずれかに記載の非水二次電池。   The non-aqueous secondary battery according to claim 1, wherein the carbon coating layer is generated by thermal decomposition of a hydrocarbon-based gas. 前記コアが、ＳｉＯｘ（ただし、０．５≦ｘ≦１．５である）とそれよりも比抵抗値が小さい導電性材料との複合体である請求項１〜６のいずれかに記載の非水二次電池。 The core according to any one of claims 1 to 6, wherein the core is a composite of SiO x (where 0.5 ≦ x ≦ 1.5) and a conductive material having a smaller specific resistance value. Non-aqueous secondary battery. 多孔質層の厚みが２〜１０μｍである請求項１〜７のいずれかに記載の非水二次電池。   The nonaqueous secondary battery according to claim 1, wherein the porous layer has a thickness of 2 to 10 μm. 前記負極合剤層は、前記負極材料と、黒鉛とを含有する請求項１〜８のいずれかに記載の非水二次電池。The non-aqueous secondary battery according to claim 1, wherein the negative electrode mixture layer contains the negative electrode material and graphite. 前記負極合剤層は、前記負極材料と、黒鉛と、カーボンブラックおよび炭素繊維より選択される少なくとも１種とを含有する請求項９に記載の非水二次電池。The nonaqueous secondary battery according to claim 9, wherein the negative electrode mixture layer contains the negative electrode material, graphite, and at least one selected from carbon black and carbon fiber.
JP2006285599A 2006-02-13 2006-10-20 Non-aqueous secondary battery Active JP5008180B2 (en)

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