State Key Laboratory of Advanced Technology for Materials Synthesis and Processing , Wuhan University of Technology , Luoshi Road 122 , Wuhan 430070 , P. R. China.
Department of Mathematics and Physics , Luoyang Institute of Science and Technology , Luoyang 471023 , P. R. China.
ACS Appl Mater Interfaces. 2018 Jun 13;10(23):19626-19632. doi: 10.1021/acsami.8b02819. Epub 2018 May 29.
Sodium-ion batteries (SIBs) are considered as one of the most favorable alternative devices for sustainable development of modern society. However, it is still a big challenge to search for proper anode materials which have excellent cycling and rate performance. Here, zinc selenide microsphere and multiwalled carbon nanotube (ZnSe/MWCNT) composites are prepared via hydrothermal reaction and following grinding process. The performance of ZnSe/MWCNT composites as a SIB anode is studied for the first time. As a result, ZnSe/MWCNTs exhibit excellent rate capacity and superior cycling life. The capacity retains as high as 382 mA h g after 180 cycles even at a current density of 0.5 A g. The initial Coulombic efficiency of ZnSe/MWCNTs can reach 88% and nearby 100% in the following cycles. The superior electrochemical properties are attributed to continuous electron transport pathway, improved electrical conductivity, and excellent stress relaxation.
钠离子电池（SIBs）被认为是现代社会可持续发展最有前途的替代设备之一。然而，寻找具有优异循环和倍率性能的合适的阳极材料仍然是一个巨大的挑战。在这里，通过水热反应和随后的研磨工艺制备了硒化锌微球和多壁碳纳米管（ZnSe/MWCNT）复合材料。首次研究了 ZnSe/MWCNT 复合材料作为 SIB 阳极的性能。结果表明，ZnSe/MWCNTs 具有优异的倍率容量和卓越的循环寿命。即使在 0.5 A g 的电流密度下，经过 180 次循环后，其容量仍保持在 382 mA h g 以上。ZnSe/MWCNTs 的初始库仑效率可达 88%，随后的循环中接近 100%。优异的电化学性能归因于连续的电子传输途径、提高的导电性和优异的应力松弛。
