| 2 | Trimethoxyboroxine as an electrolyte additive to enhance the 4.5V cycling performance of a Ni-rich layered oxide cathode显示文摘Ni-rich layered oxides are attractive cathode materials for advanced lithium-ion batteries(LIBs)due to their high energy density.However,their large-scale application is seriously hindered by their interfacial instability,especially at a high cut-off potential.Here,we demonstrate that trimethoxyboroxine(TMOBX)is an effective film-forming additive to address the interfacial instability of LiNi0.8Co0.1Mn0.1O_(2)(NCM811)material at a high cut-off voltage of 4.5V.We find that TMOBX decomposes before carbonate solvent and forms a thin cathode electrolyte interphase(CEI)layer on the surface of the NCM811 material.This TMOBX-formed CEI significantly suppresses electrolyte decomposition at a high potential and inhibits the dissolution of transition metals from NCM811 during cycling.In addition,electron-deficient borate compounds coordinate with anions(PF6^(−),F^(-) etc.)and H2O in the battery,further improving the battery's stability.As a result,adding 1.0wt%of TMOBX boosts the capacity retention of a Li||NCM811cell from 68.72%to 86.60%after 200 cycles at 0.5C in the range of 2.8–4.5V. | Wei Gu Guoyong Xue Qingyu Dong Ruowei Yi Yayun Mao Lei Zheng Haikuo Zhang Xiulin Fan Yanbin Shen Liwei Chen | 2022 | eScience2022，2，5： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员