Patent · US Active

Negative electrode material for lithium ion batteries and use thereof

US10109848B2 · kind B2 · utility

2Cited by
2References
10Claims
0Family size

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Key dates

Filing dateAug 4, 2014
Grant dateOct 23, 2018
Priority date
Expiry dateJan 14, 2035

Classification

  • Technology area (CPC Y)Emerging Cross-Sectional Technologies
  • CPC primaryY02T10/70
  • WIPO fieldElectrical machinery, apparatus, energy
  • WIPO sectorElectrical engineering

Abstract

The present invention relates to a negative electrode material for a lithium ion battery, made of a composite material comprising silicon-containing particles, artificial graphite particles and a carbon coating layer, wherein the silicon-containing particles are silicon particles having a SiOx layer (0<x≤2) on a particle surface, have an oxygen content ratio of 1 mass % or more and 18 mass % or less, and mainly comprise particles having a primary particle diameter of 200 nm or less; and the artificial graphite particles have a scale-like shape. By using the negative electrode material, a lithium ion battery having a high capacitance and excellent charge-discharge cycle characteristics can be produced.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.