Wang Junling, Wu Na, Han Longfei, Liao Can, Mu Xiaowei, Kan Yongchun, Hu Yuan
State Key Laboratory of Fire Science, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China.
State Key Laboratory of Fire Science, CAS Key Laboratory of Soft Matter Chemistry, University of Science and Technology of China, Hefei 230026, China.
J Colloid Interface Sci. 2021 Jan 1;581(Pt B):552-565. doi: 10.1016/j.jcis.2020.08.015. Epub 2020 Aug 6.
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 polyacrylonitrile@metal organic frameworks composite-derived sulfuration method, for acquiring heteroatoms doped carbon@encapsulated CoS nanoparticles (NSPCFS@CoS) as SIBs anode. This electrode shows long and steady cycling process at 1 A g. After running 2095 cycles, it maintains a capacity of 546.3 mA h g. 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, even at 4 and 8 A g, separately. In addition, NSPCFS@CoS possesses a comparative or even better rate capability than other CoS 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.
考虑到不可再生化石燃料的资源有限以及现代社会的迫切需求，钠离子电池（SIB）具有低成本、丰富的天然供应和环境友好等特点，在储能领域展现出巨大的前景，尤其是在构建大规模储能网络方面。在此，我们提出一种简便的聚丙烯腈@金属有机框架复合材料衍生硫化方法，用于获得杂原子掺杂碳@封装CoS纳米颗粒（NSPCFS@CoS）作为SIB的阳极。该电极在1 A g下显示出长循环且稳定的过程。运行2095次循环后，它保持546.3 mA h g的容量。每循环可获得极低的容量衰减率0.013%。此外，即使分别在4 A g和8 A g下，它也分别具有540.7和493.6 mA h g的高放电容量。此外，NSPCFS@CoS具有比其他基于CoS的材料和其他类型金属硫化物更好或相当的倍率性能。总体而言，该电极表现出优异的循环和倍率性能。此外，还深入研究了其钠反应动力学和存储机制。
