聚苯胺
材料科学
阴极
氮化钒
煅烧
化学工程
多硫化物
电化学
氮化物
电池(电)
涂层
多孔性
钒
硫黄
锂硫电池
图层(电子)
纳米技术
电极
化学
复合材料
电解质
冶金
催化作用
有机化学
聚合物
物理化学
工程类
功率(物理)
量子力学
聚合
物理
作者
Jingjie Lv,Haibo Ren,Ziyan Cheng,Sang Woo Joo,Jiarui Huang
出处
期刊:Molecules
[MDPI AG]
日期:2023-02-15
卷期号:28 (4): 1823-1823
被引量:6
标识
DOI:10.3390/molecules28041823
摘要
To solve the slow kinetics of polysulfide conversion reaction in Li-S battery, many transition metal nitrides were developed for sulfur hosts. Herein, novel polyaniline-coated porous vanadium nitride (VN) microrods were synthesized via a calcination, washing and polyaniline-coating process, which served as sulfur host for Li-S battery exhibited high electrochemical performance. The porous VN microrods with high specific surface area provided enough interspace to overcome the volume change of the cathode. The outer layer of polyaniline as a conductive shell enhanced the cathode conductivity, effectively blocked the shuttle effect of polysulfides, thus improving the cycling capacity of Li-S battery. The cathode exhibited an initial capacity of 1007 mAh g-1 at 0.5 A g-1, and the reversible capacity remained at 735 mAh g-1 over 150 cycles.
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