연구성과

금주의우수논문

SCI-E Article
Optimization of molybdenum-doped Ni-rich layered cathodes for long-term cycling
선양국
  1. 성명선양국()
  2. 소속공과대학 에너지공학과
  3. 캠퍼스
  4. 우수선정주2023년 06월 1째주
Author
Ryu, Hoon-Hee (Dept Energy Engn); Lim, Hyung-Woo (Dept Energy Engn); Lee, Sin Gyu (Dept Energy Engn); 선양국 (Dept Energy Engn);
Corresponding Author Info
Sun, YK (corresponding author), Hanyang Univ, Dept Energy Engn, Seoul 04763, South Korea.
E-mail
yksun@hanyang.ac.kr
Document Type
Article
Source
ENERGY STORAGE MATERIALS Volume:59 Issue: Pages:- Published:2023
External Information
http://dx.doi.org/10.1016/j.ensm.2023.102771
Abstract
The doping of Ni-rich layered cathodes is an indispensable strategy for addressing their poor ability to support long-term cycling. However, the effect of dopants on the properties of cathode materials is difficult to predict, complicating the development of cathodes with optimized electrochemical performance. This study investigates the effect of dopant (Mo) content and lithiation temperature on the properties of a Ni-rich layered cathode material and electrochemical performance of the resulting cathode. The presence of sufficient Mo affords cathode materials with fine primary particles over a wide lithiation temperature range and increases the temperature at which their crystal structures form during lithiation. It is demonstrated that the electrochemical performance of Mo-doped Ni-rich layered cathodes is largely determined by the secondary particle morphology (primary particle size) and crystallinity of the cathode material. Higher crystallinity and finer primary particles correspond to higher capacity and better long-term cycling performance, respectively. The empirically optimized Mo-doped Nirich cathode developed in this study, which is based on a cathode material featuring fine and appropriately crystalline primary particles, is sufficiently mechanically and structurally stable to afford Li-ion batteries with a long cycle life.
Web of Science Categories
Chemistry, Physical; Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
Funding
Human Resources Development program of a Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant [20214000000320]; Ministry of Trade, Industry and Energy of the Korean government; LG Energy Solution
Language
English
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