Vapor deposition of aluminium oxide into N-rich mesoporous carbon framework as a reversible sulfur host for lithium-sulfur battery cathode

查看全文 作　　者：Fei [1]Sun;Zhibin [1]Qu;Hua [1]Wang;Xiaoyan [2]Liu;Tong [1]Pei;Rui [1]Han;Jihui [1]Gao;Guangbo [1]Zhao;Yunfeng [3]Lu

机构地区：[1]School of Energy Science and Engineering,Harbin Institute of Technology,Harbin 150001,China;[2]Department of Chemistry,Shanghai Normal University,Shanghai 150001,China;[3]Department of Chemical and Biomolecular Engineering,University of California,Los Angeles,CA 90095,USA

出　　处：《Nano Research》索引2021年第14卷第1期,共8页

基　　金：the Open Project of State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Ningxia University(No.2018-13K)and the Fundamental Research Funds for the Central Universities. 摘　　要：Restraining the shuttle effects of lithium polysulfides is the key to improve the cycling reversibility and stability of lithium-sulfur(Li-S)batteries for which design of robust sulfur hosts has been regarded as the most effective strategy.In this work,we report a new type of hybrid sulfur host which is composed of Al_(2)O_(3) homogenously decorated in nitrogen-rich mesoporous carbon framework(NMC-Al_(2)O_(3)).The NMC-Al_(2)O_(3) hybrid host features a poly-dispersed spherical morphology and a mesoporous configuration with high surface area and large pore volume that can accommodate a high sulfur content up to 73.5 wt.%.As a result,the fabricated NMC-Al_(2)O_(3)-S cathode exhibits all-round improvements in electrochemical properties in term of capacities(1,212 mAh·g^(-1)at 0.2 C;755 mAh·g^(-1)at 2 C),cycling charge-discharge reversibility(sustainably 100%efficiencies)and stability(1,000 cycles with only 0.023%capacity decay per cycle at 0.5 C).By contrast,the Al_(2)O_(3)-free NMC-S cathode shows both decreased capacities and rapidly descending Coulombic efficiencies during cycling.Density functional theory(DFH')calculations further reveal that the implanted Al_(2)O_(3) can greatly enhance the chemical adsorption and catalytic conversion for various lithium polysulfides and thereby effectively prevent the polysulfide shuttling and significantly improve the utilizability,reversibility and stability of sulfur cathode. 关键词：lithium-sulfur battery aluminium oxide sulfur host nitrogen-rich carbon mesoporous structure

相关文献

参考文献（58）
引证文献（3）
耦合文献（11）

参考文献(58)

引证文献(3)

耦合文献(11)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Vapor deposition of aluminium oxide into N-rich mesoporous carbon framework as a reversible sulfur host for lithium-sulfur battery cathode

参考文献(58)

引证文献(3)

耦合文献(11)

用户提示