NEGATIVE ELECTRODE ACTIVE MATERIAL OF LITHIUM ION SECONDARY BATTERY AND PREPARATION METHOD THEREFOR, NEGATIVE ELECTRODE PLATE OF LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

Title:

NEGATIVE ELECTRODE ACTIVE MATERIAL OF LITHIUM ION SECONDARY BATTERY AND PREPARATION METHOD THEREFOR, NEGATIVE ELECTRODE PLATE OF LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

Document Type and Number:

WIPO Patent Application WO/2017/101470

Kind Code:

A1

Abstract:

Provided are a negative electrode active material of a lithium ion secondary battery and a preparation method therefor, a negative electrode plate of a lithium ion secondary battery, and a lithium ion secondary battery. The negative electrode active material comprises a carbon material core and a cladding layer formed on the surface of the carbon material core, wherein the material of the cladding layer comprises amorphous carbon and doping elements, and the dopant elements include element nitrogen. With the carbon material as a core and the cladding layer of doping elements and amorphous carbon provided on the surface thereof, the negative electrode active material of a lithium ion secondary battery has the advantages of a long life, high capacity, high rate charge and discharge characteristics and a low cost, and the negative electrode active material can effectively improve the battery charging rate, especially the fast charging capacity at low temperatures.

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Inventors:

LIANG JIAHUA (CN)
XIA SHENGAN (CN)
XIE FENGCHAO (CN)

Application Number:

PCT/CN2016/094899

Publication Date:

June 22, 2017

Filing Date:

August 12, 2016

Export Citation:

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Assignee:

HUAWEI TECH CO LTD (CN)

International Classes:

H01M4/58

Foreign References:

CN1339838A	2002-03-13
CN104707638A	2015-06-17
CN1848490A	2006-10-18
CN102315440A	2012-01-11
JPH06267531A	1994-09-22

Other References:

YAO, SHUHUA ET AL.: "Study on the Structure of the Pyrolysis Products of Polyacrylonitrile", JOURNAL OF SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY, vol. 13, no. 4, 31 December 1999 (1999-12-31), XP009507211, ISSN: 1004-4639
See also references of EP 3382781A4

Attorney, Agent or Firm:

GUANGZHOU SCIHEAD PATENT AGENT CO., LTD. (CN)

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