title: Novel Flower-like Nickel Sulfide as an Efficient Electrocatalyst for Non-aqueous Lithium-Air Batteries.
abstract: In this paper, metal sulfide materials have been explored for the first time as a new choice of bifunctional cathode electrocatalyst materials for non-aqueous lithium-air batteries (LABs). Nickel sulfides with two different morphologies of flower-like (f-NiS) and rod-like (r-NiS) are successfully synthesized using a hydrothermal method with and without the assistance of cetyltrimethyl ammonium bromide. As LAB cathode catalysts, both f-NiS and r-NiS demonstrate excellent catalytic activities towards the formation and decomposition of Li2O2, resulting in improved specific capacity, reduced overpotentials and enhanced cycling performance when compared to those of pure Super P based electrode. Moreover, the morphology of NiS materials can greatly affect LAB performance. Particularly, the f-NiS is more favorable than r-NiS in terms of their application in LABs. When compared to both r-NiS and pure super P materials as LAB cathode materials, this f-NiS catalyst material can give the highest capacity of 6733 mA h g(-1) and the lowest charge voltage of 4.24 V at the current density of 75 mA g(-1) and also exhibit an quite stable cycling performance.
authors.affiliation: Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Zhong
authors.initials: Z
authors.lastname: Ma
authors.affiliation: Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Xianxia
authors.initials: X
authors.lastname: Yuan
authors.affiliation: Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Zhenlin
authors.initials: Z
authors.lastname: Zhang
authors.affiliation: Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Delong
authors.initials: D
authors.lastname: Mei
authors.affiliation: Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Lin
authors.initials: L
authors.lastname: Li
authors.affiliation: Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Zi-Feng
authors.initials: ZF
authors.lastname: Ma
authors.affiliation: NRC Energy, Mining &Environment Portfolio, National Research Council Canada, Vancouver, BC V6T 1W5, Canada.
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.affiliation: Department of Chemical Engineering, Shanghai Jiao Tong University, Shanghai, 200240, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Yang
authors.affiliation: NRC Energy, Mining &Environment Portfolio, National Research Council Canada, Vancouver, BC V6T 1W5, Canada.
authors.forename: Jiujun
authors.initials: J
authors.lastname: Zhang