分级多孔纳米碳球的制备及其在锂硫电池中的应用
摘要：摘要以戊二醛（GA）与3-氨丙基三乙氧基硅烷（KH-550）为原料,通过醛胺缩合反应、高温煅烧以及碱刻蚀,制备了分级多孔纳米碳球（HPCN）。扫描电子显微镜（SEM）测试表明,制备的HPCN为平均粒径85.3 nm的单分散纳米球。将HPCN与单质S混合,通过熔融-扩散法制备HPCN/S正极材料,组装成锂硫（Li-S）电池后进行电化学测试。测试结果表明,HPCN/S具有优良的电化学性能,使用铝箔集流体时,在0.2 C循环100圈后放电比容量为472.1 mAh/g;采用碳纸替代铝箔集流体制备的HPCN/S-CP正极,显示出更加优异的循环稳定性与倍率性能,在0.2 C循环100圈后放电比容量为636.1 mAh/g,在1.0 C与2.0 C下的倍率比容量分别为702.7 mAh/g、249.4 mAh/g。
Abstract:：Hierarchical porous carbon nanosphere (HPCN) was synthesized through the aldimine condensation between glutaraldehyde (GA) and 3-aminopropyltriethoxysilane (KH-550) followed by subsequent calcination and NaOH etching. Scanning electron microscopy (SEM) experiments showed that HPCN displays monodispersed nanospherical structure with an average diameter of 85.3 nm. HPCN/S cathode material was prepared by a melt-diffusion method and assembled into coin cells to conduct electrochemical test. HPCN/S material exhibited excellent electrochemical performance with a discharge capacity of 472.1 mAh/g after 100 cycles at 0.2 C when using aluminium foil as current collector. When carbon paper collector was applied instead of aluminium foil, HPCN/S-CP cathode exhibited much more excellent cycling stability and rate performance with a discharge capacity of 636.1 mAh/g after 100 cycles at 0.2 C, and rate capabilities of 702.7 mAh/g and 249.4 mAh/g at 1.0 C and 2.0 C respectively.
中文标题：分级多孔纳米碳球的制备及其在锂硫电池中的应用
英文标题：Preparation of Hierarchical Porous Carbon Nanosphere and Cathode Application for Lithium-Sulfur Batteries
发表时间：2020-08-10
作者：
路继群, 陈清清, 任逸伦, 胡倩倩, 王彪, 仲皓想, 胡金龙, 张灵志
作者简介：
路继群（1980-）,男,博士研究生,主要从事储能材料与器件研究。张灵志（1969-）,男,博士,研究员,博士生导师,中国科学院百人计划引进国外杰出人才,主要从事有机光电材料和纳米材料方面的设计合成及其在各种能量存储转化器件方面（如超级电容器、锂离子电池）的应用研究。
关键词：锂硫电池,HPCN/S正极材料,多孔纳米碳球,穿梭效应,碳纸,
Key words：lithium sulfur battery,HPCN/S cathode material,porous carbon nanosphere,shuttling effect,carbon paper,
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