硫黄
材料科学
硫化镍
硫化
化学工程
多硫化物
碳纤维
锂(药物)
镍
硫化物
锂硫电池
无机化学
电极
电化学
化学
复合材料
冶金
复合数
电解质
医学
物理化学
内分泌学
工程类
作者
Chao Ye,Lei Zhang,Chunxian Guo,Dongdong Li,Anthony Vasileff,Haihui Wang,Shi‐Zhang Qiao
标识
DOI:10.1002/adfm.201702524
摘要
Lithium–sulfur batteries are a promising next‐generation energy storage device owing to their high theoretical capacity and the low cost and abundance of sulfur. However, the low conductivity and loss of active sulfur material during operation greatly limit the rating capabilities and cycling stability of lithium–sulfur batteries. In this work, a unique sulfur host hybrid material comprising nanosized nickel sulfide (NiS) uniformly distributed on 3D carbon hollow spheres (C‐HS) is fabricated using an in situ thermal reduction and sulfidation method. In the hybrid material, the nanosized NiS provides a high adsorption capability for polysulfides and the C‐HS serves as a physical confinement for polysulfides and also a 3D electron transfer pathway. Moreover, NiS has strong chemical coupling with the C‐HS, favoring fast charge transfer and redox kinetics of the sulfur electrode. With a sulfur loading of up to 2.3 mg cm −2 , the hybrid material‐based lithium–sulfur batteries offer a capacity decay as low as 0.013% per cycle and a capacity of 695 mA h g −1 at 0.5 C after 300 cycles. This unique 3D hybrid material with strong chemical coupling provides a promising sulfur host for high performance lithium–sulfur batteries.
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