多硫化物
气凝胶
硫黄
材料科学
石墨烯
介孔材料
锂硫电池
纳米技术
电池(电)
化学工程
碳纤维
电化学
化学
电极
有机化学
复合材料
复合数
催化作用
电解质
物理
功率(物理)
冶金
量子力学
物理化学
工程类
作者
Yan Yan,Peng Zhang,Zehua Qu,Minman Tong,Shuang Zhao,Zhiwei Li,Mingkai Liu,Zhiqun Lin
出处
期刊:Nano Letters
[American Chemical Society]
日期:2020-09-03
卷期号:20 (10): 7662-7669
被引量:134
标识
DOI:10.1021/acs.nanolett.0c03203
摘要
The ability to restrict the shuttle of lithium polysulfide (LiPSn) and improve the utilization efficiency of sulfur represents an important endeavor toward practical application of lithium–sulfur (Li–S) batteries. Herein, we report the crafting of a robust 3D graphene-wrapped, nitrogen-doped, highly mesoporous carbon/sulfur (G-NHMC/S) hierarchical aerogel as an effective polysulfide confinement matrix for a highly stable Li–S battery. Rich polar sites of NHMC firmly anchor LiPSn on the matrix surface. Porous NHMC provides ample space for accommodating sulfur and cushioning its volume expansion. Moreover, graphene wrapped on NHMC/S not only physically hinders the LiPSn shuttle but also interconnects the isolated NHMC/S, thus increasing electron transfer rate. Taken together, triple confinement of G-NHMC/S aerogel synergistically retains the soluble LiPSn and displays a specific capacity of 1322 mAh g–1 and 1000-cycle life. As such, rationally designed 3D carbon/sulfur aerogel affords a unique platform to impart high energy density and stable electrodes for energy storage devices.
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