Zhou Junli, Yang Xiaolan, Zhang Yajun, Jia Jinzhu, He Xinjian, Yu Lin, Pan Yuede, Liao Jingwen, Sun Ming, He Jun
Key Laboratory of Clean Chemistry Technology of Guangdong Higher Education Institutions, Guangzhou Key Laboratory of Clean Transportation Energy Chemistry, Faculty of Chemical Engineering and Light Industry, Guangdong University of Technology Guangzhou 510006 Guangdong China
Institute of Energy Innovation, College of Materials Science and Engineering, Taiyuan University of Technology Taiyuan 030024 China
Nanoscale Adv. 2021 Feb 2;3(6):1690-1698. doi: 10.1039/d0na00947d. eCollection 2021 Mar 23.
Li-S batteries are a promising next-generation electrochemical energy-storage system due to their high energy density, as well as the abundance and low cost of sulfur. However, the low conductivity of sulfur and LiS/LiS, as well as the dissolution and shuttling of intermediate lithium polysulfides, is a great challenge for high-performance Li-S batteries. Herein, interconnected NiCoO nanosheet arrays grown on carbon cloth (CC) are applied as the cathode (S/NiCoO/CC) in Li-S batteries for accommodating sulfur. The obtained cathode shows high conductivity, high dispersion of sulfur species and excellent polysulfide adsorption and catalytic properties. As a result, significantly higher specific capacity (1480 1048 mA h g at 0.1C) and greatly enhanced rate performance (624 215 mA h g at 2C) are obtained for the S/NiCoO/CC cathode in comparison to S/CC. Further, the S/NiCoO/CC cathode demonstrates a low capacity decay of 0.060% per cycle over 400 cycles at 0.5C.
锂硫电池因其高能量密度以及硫的储量丰富和成本低廉，是一种很有前景的下一代电化学储能系统。然而，硫和LiS/LiS的低导电性，以及中间多硫化锂的溶解和穿梭，对高性能锂硫电池来说是一个巨大的挑战。在此，生长在碳布（CC）上的互连NiCoO纳米片阵列被用作锂硫电池的阴极（S/NiCoO/CC）来容纳硫。所得到的阴极显示出高导电性、硫物种的高分散性以及优异的多硫化物吸附和催化性能。结果，与S/CC相比，S/NiCoO/CC阴极获得了显著更高的比容量（在0.1C时为1480 1048 mA h g）和大大增强的倍率性能（在2C时为624 215 mA h g）。此外，S/NiCoO/CC阴极在0.5C下400次循环中每循环的容量衰减率低至0.060%。
Zotero 插件
