腐殖酸基石墨化材料的制备及其电化学性能  

Preparation and Electrochemical Performance of Humic Acid-based Graphitized Materials

作　　者：司东永 黄光许[1] 张传祥[1] 邢宝林[1] 陈泽华[1] 陈丽薇[1] 张浩然 SI Dongyong;HUANG Guangxu;ZHANG Chuanxiang;XING Baolin;CHEN Zehua;CHEN Liwei;ZHANG Haoran(College of Chemistry and Chemical Engineering,Henan Polytechnic University,Jiaozuo 454003)

机构地区：[1]河南理工大学化学与化工学院,焦作454003

出　　处：《材料导报》2018年第3期368-372,共5页Materials Reports

基　　金：国家自然科学基金(U1361119;41472127;41372161);河南省高校科技创新团队(16IRTSTHN005);河南省教育厅自然科学研究计划项目(2011B44006);河南理工大学博士基金(B2010-82)

摘　　要：以腐殖酸为前驱体,通过高温热处理制备锂离子电池负极材料。采用扫描电子显微镜(SEM)、X射线衍射(XRD)和电化学测试系统对该材料的形貌、微晶结构和电化学性能进行表征。结果表明,腐殖酸基石墨化材料呈现出较为规整的石墨片层结构,且随着石墨化温度的升高,所得材料的石墨化度也越来越高。腐殖酸基石墨化材料均表现出良好的电化学性能,石墨化温度为2 800℃所制备的石墨化材料的首次放电比容量为356.7 mAh/g,充电比容量为277.6 mAh/g,首次充放电的库仑效率为77.81%,在1C和2C倍率下50次充放电循环后的容量保持率分别高达99.4%、95.9%,是一种理想的锂离子电池负极材料。The lithium-ion battery anode material have been prepared from humic acid through high-temperature heat treatment.The morphology,microcrystalline structure and electrochemical properties of as-prepared activated material were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD)and electrochemical testing system.The results indicated that the humic acid-based graphitized materials showed a more regular graphite lamellar structure,and the degree of graphitization of the materials was also getting higher and higher with the increase of graphitization temperature.The humic acid-based graphitized mate-rials all presented good electrochemical performance.The graphitized material with the temperature of 2 800℃had a first discharge specific capacity of 356.7 mAh/g and a charge capacity of 277.6 mAh/g,and the initial coulombic efficiencies was 77.81%.The capacity retention rate after 50 cycles at 1C and 2C rates was as high as 99.4%and 95.9%,respectively.The above results suggest that the humic acid-based graphitized material is an ideal lithium ion battery anode material.

关 键 词：腐殖酸 石墨化材料 锂离子电池 负极材料 电化学性能 

分 类 号：TQ424.1[化学工程]