Work

Review—Lithium-Excess Layered Cathodes for Lithium Rechargeable Batteries

Year: 2015

Type: article

Abstract: The exceptionally high gravimetric capacity of lithium-excess layered cathodes (LLCs) has generated interest in their use in lithiumion batteries (LIBs) for high-capacity applications.Their unique electrochemical and structural properties are responsible for this high capacity, which exceeds the theoretical redox capability of transition metal oxides and have been intensively investigated.However, various fundamental and practical challenges must be overcome before LLCs can be successfully commercialized.The structure of pristine LLCs, which varies with the composition and type of transition metal species used, remains unclear.In addition, the structure continuously changes during electrochemical cycling, which further complicates its understanding.In this review, we discuss the current understanding of LLCs, including their pristine structures, redox chemistries, and structural evolution during cycling, and suggest future research directions to address the critical issues.

Source: Journal of The Electrochemical Society

DOI: 10.1149/2.0071514jes

Authors: Jihyun Hong, Hyeokjo Gwon, Sung-Kyun Jung, Kyojin Ku, Kisuk Kang

Institutions: Seoul National University, Korea Advanced Institute of Science and Technology, Institute for Basic Science

Language: English

Topic: Advancements in Battery Materials

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDG: Affordable and clean energy

Open Access status: bronze

Funders: Ministry of Trade, Industry and Energy, Korea Institute of Energy Technology Evaluation and Planning