文献类型：期刊文献

中文题名：荷叶茎衍生多孔碳的制备及其在锂硫电池中的应用

英文题名：Preparation of Lotus Leaf Stem-Derived Porous Carbon and Its Application in Lithium-Sulfur Batteries

作者：王亚清[1];程素君[1];李娜[1];王斌[1];苏芸[1]

第一作者：王亚清

机构：[1]新乡学院物理与电子工程学院,河南新乡453000

第一机构：新乡学院物理与电子工程学院

年份：2021

卷号：58

期号：1

起止页码：23-29

中文期刊名：微纳电子技术

外文期刊名：Micronanoelectronic Technology

收录：CSTPCD;;北大核心:【北大核心2020】；

基金：国家自然科学基金-河南联合基金资助项目(U1904198);河南省教育厅科学基金资助项目(15A140032,19A610007);河南省科技攻关计划资助项目(192102310467)。

语种：中文

中文关键词：荷叶茎;多孔碳;正极;锂硫电池;比容量

外文关键词：lotus leaf stem;porous carbon;positive electrode;lithium-sulfur battery;specific capacity

摘要：以荷叶茎为原料,通过高温退火处理和KOH活化得到多孔碳,并将其作为硫的载体材料,最终得到C/S正极材料。通过扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)、热重法(TG)、BET分析和喇曼光谱对目标产物进行了表征,研究了C/S正极材料的结构和形貌。将C/S作为锂硫电池正极材料进行电化学测试,其显示了优异的电化学性能。在0.1 C(1 C=1672 mA·g^(-1))的电流密度时,C/S正极循环200圈后比容量高达847 mA·h·g^(-1)。在0.5 C的电流密度时,C/S正极循环500圈后比容量还能高达690 mA·h·g^(-1)。同时,C/S正极进行倍率性能测试时,其在0.1 C和5 C电流密度下,比容量分别为1067和417 mA·h·g^(-1)。另外,当电流密度恢复到0.1 C,比容量能够恢复到939 mA·h·g^(-1),表明C/S正极具有良好的倍率性能。所以,制备的C/S正极具有广阔的应用前景。
Porous carbon was obtained by high-temperature annealing treatment and KOH activation with lotus leaf stems as a raw material.Using the porous carbon as a carrier material for sulfur,a C/S positive electrode material was finally obtained.The target products were characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),thermogravimetry(TG),BET analysis and Raman spectroscopy.The structure and morphology of the C/S positive electrode materials were studied.The electrochemical testing was carried out using the C/S as a positive electrode material of lithium-sulfur batteries.The result shows that C/S positive electrode has excellent electrochemical performance.At a current density of 0.1 C(1 C=1672 mA·g^(-1)),the specific capacity of the C/S positive electrode reaches 847 mA·h·g^(-1) after 200 cycles.At a current density of 0.5 C,the specific capacity of the C/S positive electrode reaches 690 mA·h·g^(-1) after 500 cycles.Meanwhile,during the rate performance test of the C/S positive electrode,its specific capacities are 1067 and 417 mA·h·g^(-1) at current densities of 0.1 C and 5 C,respectively.Besides,when the current density is restored to0.1 C,the specific capacity can be restored to 939 mA·h·g^(-1),indicating that the C/S positive electrode has good rate performance.Therefore,the prepared C/S positive electrode has wide application prospect.