title: Gradient Mn-La-Pt Catalysts with Three-layered Structure for Li-O2battery.
abstract: Gradient Mn-La-Pt catalysts with three-layered structure of manganese dioxide (MnO2), lanthanum oxide (La2O3), and Platinum (Pt) for Li-O2battery are prepared in this study. The mass ratio of the catalysts is respectively 5:2:3, 4:2:4, and 3:2:5 (MnO2: La2O3: Pt) which is start from the side of the electrolyte. The relationship between morphology structure and electrochemical performance of gradient catalyst is investigated by energy dispersive spectrometry and constant current charge/discharge test. The Li-O2battery based on gradient Mn-La-Pt catalysts shows high discharge specific capacity (2707 mAh g-1), specific energy density (8400 Wh kg-1) and long cycle life (56 cycles). The improvement of the Li-O2battery discharge capacity is attributed to the gradient distribution of MnO2and Pt and the involvement of La2O3that can improve the energy density of the battery. More important, this work will also provide new ideas and methods for the research of other metal-air battery.
authors.affiliation: Liaoning Engineering Technology Research Center of Supercapacitor, Bohai University, Jinzhou 121013, China.
authors.forename: Kedi
authors.initials: K
authors.lastname: Cai
authors.affiliation: Liaoning Engineering Technology Research Center of Supercapacitor, Bohai University, Jinzhou 121013, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Yang
authors.affiliation: Liaoning Engineering Technology Research Center of Supercapacitor, Bohai University, Jinzhou 121013, China.
authors.forename: Xiaoshi
authors.initials: X
authors.lastname: Lang
authors.affiliation: Liaoning Engineering Technology Research Center of Supercapacitor, Bohai University, Jinzhou 121013, China.
authors.forename: Qingguo
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: School of Chemical Engineering and Environment, Beijing Institute of Technology, Beijing 100081, China.
authors.forename: Zhenhua
authors.initials: Z
authors.lastname: Wang
authors.affiliation: School of Materials Science &Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0295, USA.
authors.forename: Tieshi
authors.initials: T
authors.lastname: He