摘要
生物质废弃物制备的碳材料因其高比表面积、优异的电活性和低廉的成本在能源转换和储存领域引起了越来越多的关注。在此,使用玉米芯废弃物作为前驱体,经过高温碳化和氢氧化钾活化合成多孔生物碳材料(PBC),并将其与硫复合得到PBC/S复合材料。PBC/S复合材料作为锂硫电池正极材料表现出优异的电化学性能,在0.1C电流密度下,初始放电容量高达1177mAh/g,循环100次后,放电比容量仍为574mAh/g,每圈容量衰减率仅为0.7%。结果表明,生物碳材料是一种优良的导电框架,可提高活性物质硫的利用率,并在一定程度上抑制易溶解多硫化锂的溶解和扩散。
Carbon materials prepared from biomass waste have attracted increasing attention in the field of energy conversion and storage due to their high specific surface area,excellent electrical activity,and low cost.Here,corn cob waste was used as a precursor to synthesize porous biomass carbon material(PBC)through high-temperature carbonization and potassium hydroxide activation,and it was composited with Sulfur to obtain PBC/S composite material.The PBC/S composite material exhibited excellent electrochemical performance as a cathode material for lithium-sulfur batteries,with an initial discharge capacity of up to 1177 mAh/g at a current density of 0.1 C.Even after 100 cycles,the discharge specific capacity remained at 574 mAh/g,with a capacity decay rate of only 0.7%per cycle.The results indicate that biomass charcoal material served as an excellent conductive framework,enhancing the utilization of sulfur active material to some extent suppressing the dissolution and diffusion of soluble lithium polysulfides.
作者
初子墨
刘现稳
谷悦文
缪观莲
何江慧
阮兰君
李林
李欢
CHU Zimo;LIU Xianwen;GU Yuewen;MIAO Guanlian;HE Jianghui;RUAN Lanjun;LI Lin;LI Huan(School of Materials Science and Engineering,Guilin University of Electron Technology,Guilin 541004,China;Guangxi Key Laboratory of Information Materials,Guilin University of Electronic Technology,Guilin 541004,China;Linyi vocational university of science and technology,Linyi 27600,China)
出处
《电工材料》
2025年第4期5-10,共6页
Electrical Engineering Materials
基金
广西科技基地和特殊人才发展基金(桂科-AD21220122)
广西信息材料重点实验室(231039-Z,231038-Z)
广西高校中青年教师科研基础能力提升项目(2022KY0184)。
关键词
锂硫电池
生物质碳
玉米芯
穿梭效应
Lithium-Sulfur battery
biomass charcoal
corn-cob
shuttle effect
