Title:
PREPARATION OF HARD CARBON NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION POWER BATTERY AND MODIFICATION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2017/121069
Kind Code:
A1
Abstract:
Disclosed are a preparation of a hard carbon negative electrode material for a lithium ion power battery and a modification method therefor, falling within the field of lithium ion battery materials. In the method, a plant extract, a resin and pitch are used as precursors; the hard carbon negative electrode material is prepared by processes of cross-linking polymerization, pre-carbonization, carbonization, comminution, etc.; next, a chemical vapor deposition method is used to perform the surface coating modification of the prepared hard carbon material. After the hard carbon material is modified, the first coulombic efficiency reaches 84.69%, the first reversible capacity reaches 323.5 mAh/g, and the capacity retention ratio after 100 cycles is greater than 98.5%.
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Inventors:
TANG QIWEI (CN)
YU HENGJIE (CN)
ZHAO CHENGLONG (CN)
WANG YING (CN)
TIAN CHONGSHE (CN)
SONG NANNAN (CN)
YU HENGJIE (CN)
ZHAO CHENGLONG (CN)
WANG YING (CN)
TIAN CHONGSHE (CN)
SONG NANNAN (CN)
Application Number:
PCT/CN2016/085325
Publication Date:
July 20, 2017
Filing Date:
June 08, 2016
Export Citation:
Assignee:
SHANDONG YUHUANG NEW ENERGY TECH CO LTD (CN)
International Classes:
H01M4/1393
Foreign References:
| CN102479943A | 2012-05-30 | |||
| CN1891668A | 2007-01-10 | |||
| CN101209831A | 2008-07-02 | |||
| CN103311518A | 2013-09-18 | |||
| CN103303896A | 2013-09-18 |
Attorney, Agent or Firm:
JINAN QUANCHENG PATENT&TRADEMARK OFFICE et al. (CN)
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