Lee, Seunghak Park, Jeongeun Seok, Eunjeong Kim, Minjun Ku, Minkyeong Lim, Hyojun Kim, Sang-Ok Jung, Heechul Choi, Wonchang 2024-01-19T11:30:45Z 2024-01-19T11:30:45Z 2022-06-23 2022-09 0363-907X https://pubs.kist.re.kr/handle/201004/114754 High-Ni layered-oxide cathodes are the most prospective cathode materials for next-generation Li-ion batteries (LIBs) in electric vehicles (EVs) owing to their high specific capacity. However, High-Ni layered-oxide cathode materials exhibit inferior cyclability and low thermal stability owing to the side reaction between Ni4+ and the electrolytes. To solve these surface-related problems, we proposed a strategy for forming LiNbO3 (LNO)-with outstanding thermal stability and ionic conductivity-on a Ni-rich layered-oxide surface using polydopamine (PDA). The PDA formed on the transition metal hydroxide surface has copious catechol OH groups, which attract the Nb ions in the solution to form a LNO coating layer during the calcination process. The LiNi0.8Co0.1Mn0.1O2 (pristine LNCM) electrode experiences enormous degradation when cycled after being subjected to severe conditions-such as a full charge and a 60 degrees C storage test-but the LiNbO3-coated LNCM (LNO-LNCM) electrode exhibits particularly stable cycling performance. Furthermore, differential scanning calorimetry (DSC) results exhibited that the LNO coating notably ameliorated the thermal stability of the cathode material. As a result, our experimental results suggest that the development of cathode materials that can withstand greatly oxidized states and high-temperature environments is achievable. English John Wiley & Sons Inc. Polydopamine-induced nano-coating layer for high stability of nickel-rich cathode in secondary batteries Article 10.1002/er.8227 1 International Journal of Energy Research, v.46, no.11, pp.15276 - 15289 International Journal of Energy Research 46 11 15276 15289 N scie scopus 000808201500001 Energy & Fuels Nuclear Science & Technology Energy & Fuels Nuclear Science & Technology Article LITHIUM-ION BATTERIES IMPROVED ELECTROCHEMICAL PERFORMANCE HIGH CUTOFF VOLTAGE NI-RICH LINI0.8CO0.1MN0.1O2 CATHODE LINI0.6CO0.2MN0.2O2 CATHODE SURFACE-CHEMISTRY SPINEL CATHODES DUAL FUNCTIONS CAPACITY cathode materials high-Ni layered-oxides LiNbO3 lithium-ion batteries polydopamine