Improved Electrochemical Performance of Surface Coated LiNi0.80Co0.15Al0.05O2 With Polypyrrole

Zhaoyong Chen; Kaifeng Cao; Huali Zhu; Huali Zhu; Xiaolong Gong; Qiming Liu; Junfei Duan; Lingjun Li

doi:10.3389/fchem.2018.00648

Frontiers in Chemistry (Jan 2019)

Improved Electrochemical Performance of Surface Coated LiNi0.80Co0.15Al0.05O2 With Polypyrrole

Zhaoyong Chen,
Kaifeng Cao,
Huali Zhu,
Huali Zhu,
Xiaolong Gong,
Qiming Liu,
Junfei Duan,
Lingjun Li

Affiliations

Zhaoyong Chen: College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, China
Kaifeng Cao: College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, China
Huali Zhu: College of Physics and Electronic Science, Changsha University of Science and Technology, Changsha, China
Huali Zhu: Department of Chemistry, University of New Hampshire, Durham, NH, United States
Xiaolong Gong: College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, China
Qiming Liu: College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, China
Junfei Duan: College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, China
Lingjun Li: College of Materials Science and Engineering, Changsha University of Science and Technology, Changsha, China

DOI: https://doi.org/10.3389/fchem.2018.00648
Journal volume & issue: Vol. 6

Abstract

Read online

Nickel-rich ternary layered oxide (LiNi0.80Co0.15Al0.05O2, LNCA) cathodes are favored in many fields such as electric vehicles due to its high specific capacity, low cost, and stable structure. However, LNCA cathode material still has the disadvantages of low initial coulombic efficiency, rate capability and poor cycle performance, which greatly restricts its commercial application. To overcome this barrier, a polypyrrole (PPy) layer with high electrical conductivity is designed to coat on the surface of LNCA cathode material. PPy coating layer on the surface of LNCA successfully is realized by means of liquid-phase chemical oxidation polymerization method, and which has been verified by the scanning electron microscopy (SEM), transmission electron microscope (TEM) and fourier transform infrared spectroscopy (FTIR). PPy-coated LNCA (PL-2) exhibits satisfactory electrochemical performances including high reversible capacity and excellent rate capability. Furthermore, the capability is superior to pristine LNCA. So, it provides a new structure of conductive polymer modified cathode materials with good property through a mild modification method.

Published in Frontiers in Chemistry

ISSN: 2296-2646 (Online)
Publisher: Frontiers Media S.A.
Country of publisher: Switzerland
LCC subjects: Science: Chemistry
Website: http://journal.frontiersin.org/journal/chemistry

About the journal

Abstract

Keywords