Graphite negative electrode material for power lithium ion battery and preparation method therefor

Graphite negative electrode material for power lithium ion battery and preparation method therefor

  • CN 105,609,779 A
  • Filed: 12/23/2015
  • Published: 05/25/2016
  • Est. Priority Date: 10/28/2015
  • Status: Active Application
First Claim
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1. a preparation method for graphite cathode material for power lithium-ion battery, is characterized in that, comprises the following steps:

  • (1) primary particle preparation process, pulverizes graphite electrode powder as raw material, shaping, screening, obtains graphite electrode powder primary particle;

    (2) secondary granulation step, under the condition of inert gas shielding, heating, step (1) gained graphite electrode powder primary particle is evenly mixed with adhesive, graphitization catalyst, auxiliary agent, and secondary granulation obtains the second particle being bonded together by two or more graphite electrode powder primary particles;

    (3) graphitization step, under inert gas shielding, carries out catalyzed graphitization processing to step (2) gained second particle;

    (4) shaping process, further carries out classification or sieves graphitization afterproduct, obtains final products.

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