阳极
杂原子
聚丙烯腈
储能
硫化钴
材料科学
碳纤维
电化学
无机化学
化学工程
钴
金属有机骨架
复合数
电极
化学
复合材料
冶金
有机化学
工程类
功率(物理)
吸附
物理化学
聚合物
物理
戒指(化学)
量子力学
作者
Junling Wang,Na Wu,Longfei Han,Cheng-I Liao,Xiaowei Mu,Yongchun Kan,Yuan Hu
标识
DOI:10.1016/j.jcis.2020.08.015
摘要
Considering the finite resources of nonrenewable fossil fuels and urgent demands of modern society, sodium ion batteries (SIBs) featuring low cost, considerable natural supply and environmental friendless, show huge prospects in energy storage field, especially in constructing massive energy storage networks. Here, we propose a facile [email protected] organic frameworks composite-derived sulfuration method, for acquiring heteroatoms doped [email protected] CoS2 nanoparticles ([email protected]2) as SIBs anode. This electrode shows long and steady cycling process at 1 A g−1. After running 2095 cycles, it maintains a capacity of 546.3 mA h g−1. An exceedingly low capacity fading ratio of 0.013% per cycle can be acquired. Also, it gives high discharge capacities of 540.7 and 493.6 mA h g−1, even at 4 and 8 A g−1, separately. In addition, [email protected]2 possesses a comparative or even better rate capability than other CoS2 based materials and other types of metal sulfides. Overall, this electrode exhibits superior cycling and rate performances. Additionally, its Na+ reaction kinetics and storage mechanism are deeply investigated.
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