DataVXACS Applied Materials & InterfacesPaper
journal article·2023-12-06

Improvement of Thermodynamic Phase Stability and High-Rate Capability of Li Layered Oxides

Ji Hwan Kim, Juncheol Hwang, Young-Hoon Lee, Seok Hyun Song, Jaewoon Lee, Si-Hwan Lee, Won-Jin Moon, Hyungsub Kim, Duho Kim, Seung-Ho Yu, Yung-Eun Sung

ACS Applied Materials & Interfaces· Volume 15· Issue 48
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Source abstract

Abstract

The use of elemental doping in lithium cobalt oxide (LCO) cathode material at high cutoff voltage is a widely adopted technique in the field of rechargeable batteries to mitigate multiple unfavorable phase transitions. However, there is still a lack of fundamental understanding regarding the rationality of each doping element implemented in this method, specifically considering the various thermodynamic stability and phase transitions. Herein, we investigated the effect of Ti doping on an O2 phase LCO (LCTO) cathode material that exhibited enhanced rate performance. We suggest that the incorporation of Ti into an O2 phase LCO results in the mitigation of multiple-phase transitions and the improvement of phase stability, thereby yielding a high-rate-capable cathode material. Through a combination of experimental and computational calculations, we demonstrate that Ti doping improves the thermodynamic stability and kinetics of Li-ions during the cycling process.
Source: openalex_inverted_index · Quality: baseline

Research context

Energy storage

OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Center for Nanoparticle Research, Institute for Basic Science (IBS), 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

School of Chemical and Biological Engineering, Seoul National University, 1 Gwanak-ro, Gwanak-gu, Seoul 08826, Republic of Korea

Department of Mechanical Engineering, Kyung Hee University, 1732, Deogyeong-daero, Giheung-gu, Yongin-si, Gyeonggi-do 17104, Republic of Korea

Department of Chemical and Biological Engineering, Korea University, 145 Anam-ro, Seongbuk-gu, Seoul 02841, Republic of Korea

Neutron Science Division, Korea Atomic Energy Research Institute (KAERI), 111 Daedeok-daero 989 Beon-Gil, Yuseong-gu, Daejeon 34057, Republic of Korea

Gwangju Center, Korea Basic Science Institute, 77 Yonbong-ro, Buk-gu, Gwangju 61186, Republic of Korea

Department of KHU-KIST Convergence Science and Technology, Kyung Hee University 23, Kyunghee-daero, Dongdaemun-gu, Seoul 02447, Republic of Korea

Funding

National Research Foundation of Korea · Institute for Basic Science

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