酚醛树脂基硬碳负极材料的性能  

Performance of phenolic resin-based hard carbon anode material

作　　者：李琼 王治安 朱利民 陈慧 顾秋月 LI Qiong;WANG Zhian;ZHU Limin;CHEN Hui;GU Qiuyue(China CEC Engineering Corporation,Changsha,Hunan 410114,China)

机构地区：[1]中国轻工业长沙工程有限公司,湖南长沙410114

出　　处：《电池》2024年第3期354-357,共4页Battery Bimonthly

摘　　要：石墨负极有限的理论容量和倍率性能限制锂离子电池的发展,制备硬碳负极材料可提高理论容量。以间苯二酚和甲醛为前驱体,氨水为催化剂,通过水热法制备酚醛树脂基硬碳材料。采用SEM、高分辨透射电子显微镜(TEM)、XRD及N2吸-脱附对材料的形貌和结构进行分析,并以金属锂片为对电极组装扣式电池,测试电化学性能。硬碳样品具有典型的双电层电容和充放电可逆性,电极以50 mA/g电流在0.01~3.00 V循环,首次放电比容量达到311.22 mAh/g,首次库仑效率为60.07%,循环50次的容量保持率为75.7%,在经过不同电流循环后,基本能恢复到电流变化前的容量,表现出良好的循环稳定性和倍率性能。The limited theoretical capacity and rate capability of graphite anode limit the development of Li-ion battery.The preparation of hard carbon anode material can improve the theoretical capacity.Phenolic resin hard carbon with resorcinol and formaldehyde as precursors and ammonia as catalyst is presented with hydrothermal approach.SEM,high-resolution transmission electron microscopy(TEM),XRD and N2 adsorption-desorption are adopted to characterize the surface morphology and structural features of the materials,the electrochemical performance of the button cell with lithium metal as counter electrode is tested.The hard carbon sample exhibits typical double-layer capacitance and reversibility of charge and discharge.When the electrode is cycled in 0.01-3.00 V at a current of 50 mA/g,the initial specific discharge capacity is 311.22 mAh/g and the initial Coulombic efficiency is 60.07%,the specific capacity retention rate is 75.7%after 50 cycles.After cycling at different currents,it can basically return to the capacity before the current change,which presents good cycle stability and rate capacity.

关 键 词：锂离子电池 负极材料 硬碳 间苯二酚甲醛树脂 电化学性能 

分 类 号：TM912.9[电气工程—电力电子与电力传动]