硫黄
氧化还原
多硫化物
动力学
锂硫电池
化学工程
材料科学
储能
降级(电信)
催化作用
纳米技术
化学
电极
无机化学
电解质
计算机科学
有机化学
冶金
电信
功率(物理)
物理
物理化学
量子力学
工程类
作者
Yirui Deng,Jin‐Lin Yang,Zixuan Qiu,Wenhao Tang,Yanan Li,Qi Wang,Ruiping Liu
标识
DOI:10.1002/smtd.202301316
摘要
Due to their high energy density and cost-effectiveness, lithium-sulfur batteries (LSBs) are considered highly promising for the next generation of energy storage technologies. However, the soluble lithium-polysulfides (LiPSs) notorious for causing the shuttle effect and the sluggish redox kinetics have hindered their practical commercialization. To tackle these challenges, a heterostructural catalyst featuring NiS-NiCo2 O4 interfaces is developed, which serves as an interlayer for LSBs. These interfacial sites leverage the advantages of polar NiCo2 O4 and conductive NiS, enabling smooth Li+ diffusion, rapid electron transport, and effective immobilization of LiPSs. This synergistic approach promotes the conversion of sulfur species, resulting in a high discharge capacity of 526 mAh g-1 at 3 C for cells with the NiS-NiCo2 O4 interlayer. Additionally, remarkable cycling stability is achievable with an areal sulfur loading of ≈5.0 mg cm-2 . It is believed that this research paves the way for practical applications of LSBs.
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