Effect of carbon addition on one-step mechanical synthesis of LiCoPOub>4 ub>/C composite granules and their powder characteristics
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- 作者：Mitsuaki Matsuoka
- 关键词：Mechanical synthesis ; LiCoPO4 ; Composite granule ; Cathode ; Lithium-ion battery
- 刊名：Ceramics International
- 出版年：2017
- 出版时间：January 2017
- 年：2017
- 卷：43
- 期：1
- 页码：938-943
- 全文大小：1673 K
文摘
Lithium cobalt phosphate, LiCoPOub>4 ub>, has attracted much attention as a high voltage cathode material in lithium-ion batteries (LIBs). Since this material suffers from very low ion and electron conductivities, the composite structure made with nano-sized LiCoPOub>4 ub> and carbon can be effectively used as a cathode material. Here, we report a simple mechanical synthesis route for preparing LiCoPOub>4 ub>/C composite granules. The raw materials for LiCoPOub>4 ub> and carbon were mechanically treated with an attrition-type mill for producing LiCoPOub>4 ub>/C composite granules using a one-step process without employing external heating. With an increase in the amount of carbon used, the primary particle size of LiCoPOub>4 ub> and the median size of granules were decreased. The first discharge capacity obtained for the LiCoPOub>4 ub>/C prepared with 5 mass% carbon was 105 mA h gup>−1 up>, whereas a value of up to 134 mA h gup>−1 up> was obtained for the composite with 10 mass% carbon. We examined the effect of carbon addition on the mechanical synthesis and characteristics of LiCoPOub>4 ub> powders.