- Patent Title: Negative electrode for lithium ion secondary cell, lithium-ion secondary cell, mixture paste for negative electrode for lithium-ion secondary cell, and method for manufacturing negative electrode for lithium-ion secondary cell
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Application No.: US15116123Application Date: 2015-02-02
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Publication No.: US10297817B2Publication Date: 2019-05-21
- Inventor: Katsunori Nishiura , Masaki Saruyama , Yoshihiro Sakata , Hitoshi Onishi
- Applicant: MITSUI CHEMICALS, INC. , SHIN-ETSU CHEMICAL CO., LTD.
- Applicant Address: JP Tokyo JP Tokyo
- Assignee: MITSUI CHEMICALS, INC.,SHIN-ETSU CHEMICAL CO., LTD.
- Current Assignee: MITSUI CHEMICALS, INC.,SHIN-ETSU CHEMICAL CO., LTD.
- Current Assignee Address: JP Tokyo JP Tokyo
- Agency: Foley & Lardner LLP
- Priority: JP2014-019093 20140204; JP2014-019094 20140204
- International Application: PCT/JP2015/000445 WO 20150202
- International Announcement: WO2015/118849 WO 20150813
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/134 ; H01M4/38 ; H01M4/62 ; H01M10/0525 ; H01M4/04 ; H01M4/587 ; H01M4/02

Abstract:
A negative electrode for a lithium-ion secondary cell, the negative electrode including a layered body of a collector and a negative electrode active material layer containing an alloy-based material (A) containing silicon or tin as a constituent element, a carbon coating (C) that covers the surface of the alloy-based material (A), carbon particles (B), and a binder (D), wherein the negative electrode for a lithium-ion secondary cell is characterized in that the total pore volume and average pore diameter of the carbon particles (B), as measured by nitrogen gas adsorption, satisfy the ranges of 1.0×10−2 to 1.0×10−1 cm3/g and 20 to 50 nm, respectively. The negative electrode for a lithium-ion secondary cell, and a lithium-ion secondary cell in which such a negative electrode for a lithium-ion secondary cell is used, have a high capacity and excellent cycle characteristics.
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