Method for producing hard carbon lithium metal composite negative pole material for lithium ion battery |
Title: |
Method for producing hard carbon lithium metal composite negative pole material for lithium ion battery |
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Application Number: |
200610089725 |
Application Date: |
2006/07/14 |
Announcement Date: |
2007/01/03 |
Pub. Date: |
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Publication Number: |
1889288 |
Announcement Number: |
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Grant Date: |
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Granted Pub. Date: |
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ApplicationType: |
Invention |
State/Country: |
11[China|beijing] |
IPC: |
H01M 4/04, H01M 4/58, C01D 15/00, B01F 3/18 |
Applicant(s): |
Tsinghua Univ. |
Inventor(s): |
Sun Hao, He Xiangming, Ren Jianguo, Li Jianjun, Wang Li, Jiang Changyin, Wan Chenrong |
Key Words: |
hard carbon lithium metal composite, negative pole material, lithium ion battery |
Abstract: |
The present invention relates to lithium ionization cell used hard carbon - lithium metal compounding cathode material preparation method, belonging to chemical engineering and new material technology field, in particular relating to lithium secondary cell cathode material preparative technique field. One method is to make hard carbon material with lithium powder mixing upon inert gas atmosphere, to obtain hard carbon - lithium metal compounding cathode material. Another method is to prepare hard carbon material powder into electrode piece, then under inert gas atmosphere pressing lithium foil on hard carbon electrode piece surface to obtain hard carbon - lithium metal compounding cathode material. The mass ratio relation of lithium with hard carbon material in above-mentioned two methods satisfies that the lithic first excess loading capacity can compensate hard carbon first non-reversible capacity. Said invention provided method can prepare cathode material with more than first Coulomb 100 per cent, high electrochemical activity, large reversible capacity, fine cycle performance, low material cost, and simple technological process etc advantages. |
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