文献类型：期刊文献

中文题名：MnS掺杂多孔碳复合材料的制备及电化学性能

英文题名：Preparation and electrochemical properties of MnS doped porous carbon composites

作者：兰大为 赵悦 刘云颖 崔金龙 周晨亮 崔永福

第一作者：兰大为

机构：[1]内蒙古科技大学化学与化工学院,内蒙古包头014010;[2]内蒙古工业大学化工学院,内蒙古呼和浩特010051;[3]贵州理工学院交通工程学院,贵州贵阳550003

第一机构：内蒙古科技大学化学与化工学院,内蒙古包头014010

年份：2022

卷号：39

期号：3

起止页码：592-597

中文期刊名：精细化工

外文期刊名：Fine Chemicals

收录：CSTPCD;;EI(收录号：20221411877847);Scopus;北大核心:【北大核心2020】；CSCD:【CSCD2021_2022】；

基金：国家自然科学基金(51962027、21968022);内蒙古自然科学基金(2020MS02024)。

语种：中文

中文关键词：褐煤;腐植酸;负极材料;MnS@C复合材料;锂离子电池;有机电化学与工业

外文关键词：lignite;humic acid;anode materials;MnS@C composites;lithium-ion batteries;electro-organic chemistry and industry

摘要：将褐煤提取腐植酸后的剩余残渣作为碳源,以MnSO_(4)·H_(2)O、(NH_(4))_(2)SO_(4)和(NH_(4))_(2)S_(2)O_(8)为原料,采用水热法制备了MnS@C复合材料。采用XRD、拉曼光谱、XPS、N_(2)吸附-脱附、SEM和TEM对样品进行了表征。将该复合材料应用于锂离子电池负极材料,对其电化学性能进行了测试。结果表明,Mn S@C复合材料的比表面积和孔容分别为117.19 m^(2)/g和0.044 mL/g,在0.1 A/g电流密度下循环200次后,其放电比容量高达830 mA·h/g,且库仑效率稳定在99%以上。在0.2、0.4、0.8、1.0、1.2和1.6 A/g电流密度下的放电比容量分别为644、522、427、399、373和348 mA·h/g,展现出良好的倍率性能。MnS@C复合材料优异的电化学性能得益于碳基体的存在,可以缓解Mn S纳米粒子在嵌锂/脱锂过程中的体积膨胀。
The residual residue after extracting humic acid from lignite was used as carbon source to prepare MnS@C composites with MnS nanoparticles and characterized by XRD,Raman,XPS,N_(2) adsorptiondesorption,SEM and TEM.The electrochemical performance of the composites was tested by applying it to the anode material of lithium ion battery.The results showed that the specific surface area and pore volume of MnS@C composites were 117.19 m^(2)/g and 0.044 mL/g,respectively.MnS@C composites had a specific discharge capacity of 830 m A·h/g after 200 cycles at 0.1 A/g with a coulomb efficiency of maintaining above 99%.Furthermore,MnS@C composites exhibited good rate performance.The specific discharge capacities were 644,522,427,399,373 and 348 mA·h/g at 0.2,0.4,0.8,1.0,1.2 and 1.6 A/g,respectively.The exceptional electrochemical performance of MnS@C composites was attributed to the existence of carbon matrix,which could buffer the volume expansion of MnS nanoparticles in the process of lithiation/delithiation.