Multiple Linkage Modification of Lithium-Rich Layered Oxide Li1.2Mn0.54Ni0.13Co0.13O2 for Lithium Ion Battery

Jun-Chao Zheng; Zhuo Yang; Peng-Bo Wang; Lin-Bo Tang; Chang-Sheng An; Zhen-Jiang He

doi:10.1021/acsami.8b09256

Multiple Linkage Modification of Lithium-Rich Layered Oxide Li_1.2Mn_0.54Ni_0.13Co_0.13O₂ for Lithium Ion Battery

ACS Appl Mater Interfaces. 2018 Sep 19;10(37):31324-31329. doi: 10.1021/acsami.8b09256. Epub 2018 Sep 7.

Authors

Jun-Chao Zheng¹, Zhuo Yang¹, Peng-Bo Wang¹, Lin-Bo Tang¹, Chang-Sheng An¹, Zhen-Jiang He^{1

2}

Affiliations

¹ School of Metallurgy and Environment , Central South University , Changsha 410083 , P. R. China.
² School of Environmental Science and Engineering , Donghua University , Shanghai 201620 , P. R. China.

PMID: 30148344
DOI: 10.1021/acsami.8b09256

Abstract

A multiple linkage modification (MLM) method was investigated to comprehensively improve the properties of lithium-rich layered oxides. MLM Li_1.2Mn_0.54Ni_0.13Co_0.13O₂ was successfully synthesized via continuous and appropriate heat treatment. The synthesized Li_1.2Mn_0.54Ni_0.13Co_0.13O₂ particles were coated with a Li₂ZrO₃ layer and doped with Zr⁴⁺ by using a Zr compound as the MLM reagent. The Li₂ZrO₃ coating layer could protect materials from the corrosion of hydrogen fluoride, and the structure of the base materials was stabilized due to Zr⁴⁺ doping. In addition, the formation of Li₂ZrO₃ captured inactive residual lithium on the surface and absorbed lithium of host materials, thereby leading to the reduction in the Li/M ratio of materials and promoting the first-cycle Coulombic efficiency. The MLM material delivered the highest initial cycle Coulombic efficiency (∼85%), the best cycle and rate performance among bare and ZrO₂-coated particles. These results indicate that MLM is an important technique for improving the performance of electrode materials.

Keywords: cathode material; electrochemical performance; lithium ion battery; lithium-rich layered oxide; multiple linkage modification.