Composite electrode material and method for manufacturing the same

專利類型

發明

專利國別 (專利申請國家)

美國

專利申請案號

15/159,898

專利證號

US 10,411,253 B2

專利獲證名稱

Composite electrode material and method for manufacturing the same

專利所屬機關 (申請機關)

國立成功大學

獲證日期

2019/09/10

技術說明

本發明藉由在微米矽顆粒上成長石墨烯奈米牆及氮摻雜超微奈米結 晶鑽石(N-UNCD)，製作出長循環壽命之鋰離子電池。未經過處理之 矽陽極僅能作幾十次充放電循環，但在鍍上石墨烯奈米牆及N- UNCD後，矽陽極能達到超過百次充放電循環。石墨烯奈米牆和N- UNCD在矽顆粒之間以及矽顆粒和集流體之間提供良好的電接點，即 使微米矽顆粒在充放電時經過體積劇烈膨脹收縮碎裂後，電子仍能 透過石墨烯奈米牆及N-UNCD傳導出去。應用便宜的微米矽顆粒製 作出高容量鋰離子電池或將影響未來鋰離子電池產業甚鉅。 We have demonstrated a silicon micro-particles based anode for lithium ion battery which exhibits long charge-discharge cycling life. It has been made possible by coating both the silicon micro-particles and the fabricated anode with nitrogen-incorporated ultrananocrystalline diamond (N-UNCD) and graphene nanowalls. While uncoated Si anode fails within few tens of cycles, the coated Si anode lasts for 100 cycles and beyond. Vertical graphene nanowalls grown N-UNCD coated silicon micro- particles provide additional electrical contacts with neighboring particles and the current collector through graphene nanowalls even after coated silicon micro-particles are broken due to volume expansion and shrinkage. High-capacity lithium ion battery made of inexpensive silicon micro- particles is economic and might impact future lithium ion battery industry significantly.

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