Comprehensive Review of P2-Type Na2/3Ni1/3Mn2/3O2, a Potential Cathode for Practical Application of Na-Ion Batteries

Jiaolong Zhang; Wenhui Wang; Wei Wang; Shuwei Wang; Baohua Li

doi:10.1021/acsami.9b03937

Comprehensive Review of P2-Type Na_2/3Ni_1/3Mn_2/3O₂, a Potential Cathode for Practical Application of Na-Ion Batteries

ACS Appl Mater Interfaces. 2019 Jun 26;11(25):22051-22066. doi: 10.1021/acsami.9b03937. Epub 2019 Jun 11.

Authors

Jiaolong Zhang¹, Wenhui Wang², Wei Wang¹, Shuwei Wang¹, Baohua Li¹

Affiliations

¹ Engineering Laboratory for the Next Generation Power and Energy Storage Batteries, Graduate School at Shenzhen , Tsinghua University , Shenzhen 518055 , China.
² Shenzhen Key Laboratory of Organic Pollution Prevention and Control, Environmental Science and Engineering Research Center , Harbin Institute of Technology , Shenzhen 518055 , China.

PMID: 31136141
DOI: 10.1021/acsami.9b03937

Abstract

P2-type Na_2/3Ni_1/3Mn_2/3O₂ is a promising cathode material for practical applications in Na-ion batteries, due to its high energy density, high volumetric capacity, excellent Na ion conductivity, ease of synthesis, and good stability in air. Yet, it is subject to structural rearrangements on charging to high voltage/low Na content and Na⁺/vacancy ordering transitions, which lead to poor reversibility and dramatic capacity decay upon cycling. In this Review, we present the latest advances related to Na_2/3Ni_1/3Mn_2/3O₂, with a main focus on strategies to stabilize the structural framework and improve the electrochemical properties. Practical issues and challenges are also proposed on the basis of current research status and progress.

Keywords: Na-ion batteries; Na/vacancy ordering; P2-NaNiMnO; cathode; cation substitution; structural transformation; surface modification.