April 22 - 26, 2024
Seattle, Washington
May 7 - 9, 2024 (Virtual)

Event Supporters

2024 MRS Spring Meeting
ES06.06.03

Functional Surface Modification of Ni-Rich Cathode for All-Solid-State Lithium-Ion Batteries Employing Sulfide Solid Electrolytes

When and Where

Apr 25, 2024
9:30am - 9:45am
Room 432, Level 4, Summit

Presenter(s)

Co-Author(s)

Jun Pyo Son1,Yoon Seok Jung1

Yonsei University1

Abstract

Jun Pyo Son1,Yoon Seok Jung1

Yonsei University1
Intensive research and development efforts have been directed towards lithium-ion battery (LIB) for electric vehicle applications. However, conventional LIBs utilize flammable organic liquid electrolytes, which pose inherent safety risks, including a propensity for fire-related incidents. These safety concerns have spurred heightened interests in all-solid-state batteries (ASSBs), which utilize inorganic solid electrolytes (SEs) instead. For ASSBs to meet the practical demands of high energy density, the use of Ni-rich layered oxide cathode active materials (CAMs), denoted as LiMO<sub>2</sub> (M = Ni, Co, Mn, and/or Al), which are prevalent in LIBs, is essential. However, a significant change arises with sulfide SEs, known for their high ionic conductivity but poor electrochemical stability. This instability necessitates the application of an insulating buffer layer on Ni-rich CAMs. Furthermore, Ni-rich CAMs are prone to structural instability, leading to internal cracking and significant degradation, notably an irreversible H2-H3 phase transition when in high states of charge. To address the structural stability issues inherent in Ni-rich CAMs, metal doping techniques have been commonly employed.<br/>In this presentation, we propose a comprehensive strategy that addresses not only the poor electrochemical stability of sulfide SEs but also the detrimental phase transition of Ni-rich CAMs. This approach involves the development of multi-component functional coatings. Along with significantly enhanced electrochemical performance, interfacial evolutions probed by complementary analyses are presented.

Keywords

inorganic

Symposium Organizers

Yoon Seok Jung, Yonsei University
Dongping Lu, Pacific Northwest National Laboratory
Hui Wang, University of Louisville
Yang Zhao, University of Western Ontario

Symposium Support

Bronze
BioLogic

Session Chairs

Dongping Lu
Yang Zhao

In this Session