Investigation on the Electrochemical Properties and Stabilized Surface/Interface of Nano-AlPO4-Coated Li1.15Ni0.17Co0.11Mn0.57O2 as the Cathode for Lithium-Ion Batteries

Jinhua Song; Yong Wang; Zhenhe Feng; Xinghao Zhang; Ke Wang; Haitao Gu; Jingying Xie

doi:10.1021/acsami.8b06670

Investigation on the Electrochemical Properties and Stabilized Surface/Interface of Nano-AlPO₄-Coated Li_1.15Ni_0.17Co_0.11Mn_0.57O₂ as the Cathode for Lithium-Ion Batteries

ACS Appl Mater Interfaces. 2018 Aug 15;10(32):27326-27332. doi: 10.1021/acsami.8b06670. Epub 2018 Aug 3.

Authors

Jinhua Song¹, Yong Wang¹, Zhenhe Feng¹, Xinghao Zhang¹, Ke Wang¹, Haitao Gu¹, Jingying Xie¹

Affiliation

¹ State Key Laboratory of Space Power-Sources Technology , Shanghai Institute of Space Power-Sources , Shanghai 200245 , China.

PMID: 30028123
DOI: 10.1021/acsami.8b06670

Abstract

Being considered as one of the most potential cathode materials, Li_1.15Ni_0.17Co_0.11Mn_0.57O₂ draws plenty of attention towards its optimization on cycling and rate performance. The surface coating process provides a longer cycling life and better rate performance for the cathodes. A systematic investigation has been carried out on the nano-AlPO₄ coating layer for the Li_1.15Ni_0.17Co_0.11Mn_0.57O₂ cathode material through a facile in situ dispersion process. The 1% coated cathode material can hold about 90% capacity retention after 100 cycles. Besides, the surface coating enhances the rate ability of Li_1.15Ni_0.17Co_0.11Mn_0.57O₂, which holds a reversible capacity of 202.3 mAh g^-1 at the rate of 1C. Surface information is collected during cycling, which reveals that less side reactions occur on the electrode-electrolyte interface after the coating process for improved cycling and rate performance.

Keywords: Li-rich cathode; in situ coating; less side products; nano-AlPO4; surface modification.