材料科学
电极
阳极
电化学
电池(电)
光电子学
集电器
阴极
电导率
锂(药物)
化学工程
电解质
复合材料
电气工程
工程类
物理
内分泌学
物理化学
功率(物理)
化学
医学
量子力学
作者
Kun Liang,Kyle Marcus,Shoufeng Zhang,Le Zhou,Yilun Li,Samuel T. De Oliveira,Nina Orlovskaya,Yongho Sohn,Yang Yang
标识
DOI:10.1002/aenm.201701309
摘要
Abstract In this work, a freestanding NiS 2 /FeS holey film (HF) is prepared after electrochemical anodic and chemical vapor deposition treatments. With the combination of good electrical conductivity and holey structure, the NiS 2 /FeS HF presents superior electrochemical performance, due to the following reasons: (i) Porous structure of HF provides a large surface area and more active sites/channels/pathways to enhance the ion/mass diffusion. Moreover, the porous structure can reduce the damage from the volumetric expansion. (ii) The as‐prepared electrode combines the current collector (residual NiFe alloy) and active materials (sulfides) together, thus reducing the resistance of the electrode. Additionally, the good conductivity of HF can improve electron transport. (iii) Sulfides are more stable as active materials than sulfur, showing only a small capacity decay while retaining high cyclability performance. This work provides a promising way to develop high energy and stable electrode for Li‐S battery.
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