A superior Li2SiO3-Composited LiNi0.5Mn1.5O4 Cathode for High-Voltage and High-Performance Lithium-ion Batteries. (1st May 2017)

• Record Type: Journal Article
• Authors: Deng, Yunlong; Mou, Jirong; Wu, Huali; Jiang, Na; Zheng, Qiaoji; Lam, Kwok Ho; Xu, Chenggang; Lin, Dunmin
• Is Part Of: Electrochimica acta. Volume 235(2017)
• Page Start: 19
• Page End: 31
• Publication Date: 2017-05-01
• Subjects: Fast Li+-ion conductor -- Li2SiO3 -- LiNi0.5Mn1.5O4 -- Composite cathode -- Electrochemical performance; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2017.03.066
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: Abstract: In this work, Li2 SiO3, a layer-structured fast Li + -ion conductor with three-dimensional Li + paths, has been firstly introduced into LiNi0.5 Mn1.5 O4 to form novel cathode composites of (1-x)LiNi0.5 Mn1.5 O4 ·xLi2 SiO3 via a citric acid-assisted sol-gel method. The effects of Li2 SiO3 on the phase structure, morphology and electrochemical performance of the materials were investigated. As x increases, the structure and electrochemical properties of the materials are tailored. The cathode material with x = 0.10 delivers ultrahigh initial discharge capacity ∼150.3 mAh g −1, which is 24.4% larger than that of the pristine LiNi0.5 Mn1.5 O4 (120.8 mAh g −1 ). The Li2 SiO3 -composited LiNi0.5 Mn1.5 O4 materials present an enhanced cycling stability, better rate performance and lower charge transfer resistance. These excellent electrochemical properties indicate that the compositing of fast Li + -ion conductor Li2 SiO3 is an effective method to enhance the electrochemical performance of LiNi0.5 Mn1.5 O4 -based cathode materials.