用作锂电池负极材料的多孔生物质碳的合成及表征  

Synthesis of Porous Biomass Carbon as Anode Materialfor Lithium Ion Batterries

作　　者：田月茹 张露 顾元香[1] TIAN Yue-ru;ZHANG Lu;GU Yuan-xiang(College of Environmental and Safety Engineering,Qingdao University of Science and Technology,Shandong Qingdao 266042,China)

机构地区：[1]青岛科技大学环境与安全工程学院,山东青岛266042

出　　处：《广州化工》2021年第6期45-47,共3页GuangZhou Chemical Industry

基　　金：国家级大学生创新创业项目(项目编号:201910426009)。

摘　　要：以藕片为碳源制备生物质多孔碳用作锂电池负极材料,在不同电流密度下的倍率性能测试中,0.1 A/g电流密度下电池首次充放电容量最高可达500 mAh/g,经过60圈循环后电流密度再次恢复到0.1 A/g,生物质多孔碳放电比容量仍然高达500 mAh/g。在电流密度0.5 A/g下,比容量最高可达212 mAh/g左右,经过700次循环比容量仍可维持200 mAh/g,其放电容量保持率为99.4%,显示出材料良好的循环稳定性。说明该碳材料不仅具有较高的循环稳定性还具有较好的倍率性能。Porous biomass carbon was prepared by using fresh buckwheat as a carbon source,and it was used as an anode material for lithium-ion batteries.The rate capability material was tested at different current densities.The first discharge can reach 500 mAh/g at the current density of 0.1 A/g.After 60 cycles,the discharge specific capacity was still as high as 500 mAh/g when the current density was restored to 0.1 Ah/g.At the current density of 0.5 A/g,specific capacity can maintain 212 mAh/g and retention rate of its discharge capacity was 99.47%after 700 cycles,which showed the material good cycle stability and rate performance.

关 键 词：生物质多孔碳 锂电池 负极材料 

分 类 号：X24[环境科学与工程—环境科学]