MoS2-Coated N-doped Mesoporous Carbon Spherical Composite Cathode and CNT/Chitosan Modified Separator for Advanced Lithium Sulfur Batteries
MoS2-Coated N-doped Mesoporous Carbon Spherical Composite Cathode and CNT/Chitosan Modified Separator for Advanced Lithium Sulfur Batteries
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DOI：
10.1021/acssuschemeng.8b04157
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发表时间：
2018-12-01
影响因子：
8.4
通讯作者：
Wang, Ying
中科院分区：
文献类型：
--
作者：
Jiang, Shouxin;Chen, Manfang;Wang, Ying
多硫化物穿梭效应是阻碍锂硫电池商业化应用的重要问题之一。为了解决上述问题，促进lbs的商业化，本文提出了二硫化钼包覆氮掺杂介孔碳球/硫（NMCS@MoS2/S）复合阴极和碳纳米管/壳聚糖改性分离器（CNT/CH）的整体设计策略。在整体设计中，NMCS@MoS2作为硫的寄主和多硫化锂（LiPSs）吸附剂；CNT/CH改性分离器在促进锂离子传输和LiPSs的化学吸附方面也具有不可估量的作用。结果表明，含有NMCS@MoS2/S-CNT/CH的lsdb在0.5℃下循环200次后，可释放827 mAh g（-1）的高可逆容量，容量保持率高达92.4%。该设计具有明显的优异电化学性能，为解决LiPSs的穿梭效应和促进lsdb的产业化提供了令人振奋的策略。
The polysulfide shuttle effect is one of the most important problems hindering the commercial application of lithium-sulfur batteries (LSBs). In order to solve the above problem and promote LSBs commercialization, herein a holistic design strategy on the molybdenum disulfide-coated nitrogen-doped mesoporous carbon sphere/sulfur (NMCS@MoS2/S) composite cathode and carbon nanotube/chitosan modified separator (CNT/CH) is proposed. In the holistic design, the NMCS@MoS2 plays a role in the host of sulfur and the lithium polysulfides (LiPSs) adsorbent; the CNT/CH modified separator also has an inestimable role in promoting lithium ion transport and chemical adsorption of LiPSs. The results show that the LSBs with the NMCS@MoS2/S-CNT/CH release a high reversible capacity of 827 mAh g(-1) with a high capacity retention of 92.4% at 0.5 C after 200 cycles. The delicate design exhibits apparently excellent electrochemical performance and provides an exciting strategy for solving the shuttle effect of LiPSs and boosting industrialization of LSBs.