title: Amorphous Li2 O2 : Chemical Synthesis and Electrochemical Properties.
abstract: When aprotic Li-O2 batteries discharge, the product phase formed in the cathode often contains two different morphologies, that is, crystalline and amorphous Li2 O2 . The morphology of Li2 O2 impacts strongly on the electrochemical performance of Li-O2 cells in terms of energy efficiency and rate capability. Crystalline Li2 O2 is readily available and its properties have been studied in depth for Li-O2 batteries. However, little is known about the amorphous Li2 O2 because of its rarity in high purity. Herein, amorphous Li2 O2 has been synthesized by a rapid reaction of tetramethylammonium superoxide and LiClO4 in solution, and its amorphous nature has been confirmed by a range of techniques. Compared with its crystalline siblings, amorphous Li2 O2 demonstrates enhanced charge-transport properties and increased electro-oxidation kinetics, manifesting itself a desirable discharge phase for high-performance Li-O2 batteries.
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022, China.|University of Chinese Academy of Science, Beijing, 100049, China.
authors.forename: Yelong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022, China.
authors.forename: Qinghua
authors.initials: Q
authors.lastname: Cui
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022, China.
authors.forename: Xinmin
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA, 70803, USA.
authors.forename: William C
authors.initials: WC
authors.lastname: McKee
authors.affiliation: Department of Chemical Engineering, Louisiana State University, Baton Rouge, LA, 70803, USA.
authors.forename: Ye
authors.initials: Y
authors.lastname: Xu
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Shigang
authors.initials: S
authors.lastname: Ling
authors.affiliation: Institute of Physics, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Li
authors.affiliation: State Key Lab of Physical Chemistry of Solid Surfaces and College of Chemistry & Chemical Engineering, Xiamen University, Xiamen, 361005, China.
authors.forename: Guiming
authors.initials: G
authors.lastname: Zhong
authors.affiliation: State Key Lab of Physical Chemistry of Solid Surfaces and College of Chemistry & Chemical Engineering, Xiamen University, Xiamen, 361005, China.
authors.forename: Yong
authors.initials: Y
authors.lastname: Yang
authors.affiliation: State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Science, Changchun, Jilin, 130022, China. zqpeng@ciac.ac.cn.
authors.forename: Zhangquan
authors.identifier: 0000-0002-4338-314X
authors.initials: Z
authors.lastname: Peng
keywords: amorphous Li2O2; aprotic Li-O2 batteries; charge-transport properties; oxidation kinetics