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Title:
LITHIUM-ION SECONDARY CELL
Document Type and Number:
WIPO Patent Application WO/2021/002385
Kind Code:
A1
Abstract:
Provided is a configuration of a lithium-ion secondary cell having exceptional low-temperature rate characteristics. This lithium-ion secondary cell includes, as a negative electrode, a composite body (A) that includes Si-containing particles (A1) in which the average particle diameter dAV of primary particles is 5-95 nm, particles (A2) comprising a graphite-containing substance, and a carbonaceous material (A3), the lithium-ion secondary cell including a composite negative electrode material in which 80 or more particles (A1) having a minor axis/major axis ratio of 0.70 or greater are present among the particles (A1), and being such that a non-aqueous liquid electrolyte includes the liquid electrolyte additive shown in the formula. (A is CAT+ or R1, and B is CAT+ or R2. CAT+ is a cation of pyrrolidinium, piperidinium, azepanium, onium, sulfonium, phosphonium, imidazolium, pyridinium, or a heterocyclic ring. +Cation includes onium, sulfonium, phosphonium, and a heterocycle.)

Inventors:
INOSE TSUYOSHI (JP)
MORI TAKASHI (JP)
ITO YUJI (JP)
MOGANTY SURYA (US)
ABBATE LUIGI (US)
BROWN KEVIN (US)
Application Number:
JP2020/025788
Publication Date:
January 07, 2021
Filing Date:
July 01, 2020
Export Citation:
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Assignee:
SHOWA DENKO KK (JP)
NOHMS TECH INC (US)
International Classes:
H01M4/36; H01M4/38; H01M10/0525; H01M10/0567; H01M10/0569
Attorney, Agent or Firm:
SSINPAT PATENT FIRM (JP)
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