论文摘要
制备了α-MnO2纳米管作为硫的宿主材料,将硫填充到α-MnO2管的中空部分,并通过原位聚合法在α-MnO2外层包覆一层薄层聚（3,4-乙烯二氧噻吩）（PEDOT）进一步束缚硫。这样一种双重固硫的阴极材料S@α-MnO2-PEDOT在锂硫电池中体现出了高的性能。在电流密度1 675 mA·g-1（1C）下循环200圈,容量为774.4 mAh·g-1,且在电流密度为3 350 mA·g-1（2C）下容量达854.1 mAh·g-1,体现出良好的循环稳定性和倍率性能。这些显著的性能得益于阴极材料新颖的结构。在这种结构中,α-MnO2纳米管不仅能对硫起到物理限制作用,而且增强了硫宿主材料和多硫化物间的化学相互作用。同时,PEDOT的引入增强了含硫纳米复合材料的导电性,并进一步减少了由于体积变化和多硫化锂的过度溶解引起的硫的损失。
论文目录
文章来源
类型: 期刊论文
作者: 葛优,潘沛锋,彭霞,刘瑞卿,朱红丽,冯晓苗,沈清明,黄镇东,马延文
关键词: 锂硫电池,纳米管,水热自组装
来源: 无机化学学报 2019年05期
年度: 2019
分类: 工程科技Ⅰ辑,工程科技Ⅱ辑
专业: 材料科学,电力工业
单位: 南京邮电大学有机电子与信息显示重点实验室暨先进材料研究所(IAM)
基金: 国家自然科学基金(No.51772157,61504062,21575069),江苏省自然科学基金(No.BK20150863,BK20160890),江苏省研究生创新工程项目(No.CXZZ12_0461),南京邮电大学基金项目(No.NY217004)资助
分类号: TB383.1;TM912
页码: 769-779
总页数: 11
文件大小: 1237K
下载量: 128
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