title: SnO2 as a high-efficiency polysulfide trap in lithium-sulfur batteries.
abstract: The ithium-sulfur battery stands as one of the most promising successors of traditional lithium-ion batteries due to its super high theoretical energy density, but practical application still suffers from the shuttle effect arising from soluble intermediate polysulfides. Here, we report SnO2 as a chemical adsorbent for polysulfides. As an interlayer between the cathode and separator, SnO2 gives better results to prevent the polysulfides from diffusing to the lithium anode than as a modifier of the carbon matrix directly. The lithium-sulfur battery with an SnO2 interlayer delivers an initial reversible capacity of 996 mA h g(-1) and retains 832 mA h g(-1) at the 100(th) discharge at 0.5 C, with a fading rate of only 0.19% per cycle. The improvements benefit from the quasi-open space provided by the interlayer configuration for the diffused sulfur species, which can largely relieve the loss of active substances caused by the volume effect during the lithiation/delithiation process.
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China. yuanlixia@hust.edu.cn huangyh@hust.edu.cn.
authors.forename: Jing
authors.initials: J
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China. yuanlixia@hust.edu.cn huangyh@hust.edu.cn.
authors.forename: Lixia
authors.initials: L
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China. yuanlixia@hust.edu.cn huangyh@hust.edu.cn.
authors.forename: Kai
authors.initials: K
authors.lastname: Yuan
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China. yuanlixia@hust.edu.cn huangyh@hust.edu.cn.
authors.forename: Zhen
authors.initials: Z
authors.lastname: Li
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China. yuanlixia@hust.edu.cn huangyh@hust.edu.cn.
authors.forename: Zhangxiang
authors.initials: Z
authors.lastname: Hao
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China. yuanlixia@hust.edu.cn huangyh@hust.edu.cn.
authors.forename: Jingwei
authors.initials: J
authors.lastname: Xiang
authors.affiliation: State Key Laboratory of Material Processing and Die & Mould Technology, School of Materials Science and Engineering, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China. yuanlixia@hust.edu.cn huangyh@hust.edu.cn.
authors.forename: Yunhui
authors.initials: Y
authors.lastname: Huang