Lv, Y.Huang, S.Lu, S.Ding, W.Yu, X.Liang, G.Zou, J.Kang, F.Zhang, J.Cao, Y.2025-07-212025-07-212022Journal of Power Sources, 2022; 536:231510-1-231510-90378-77531873-2755https://hdl.handle.net/2440/146156Ni-rich layered oxide material with high theoretical capacity and low cost is one of the most promising cathode candidates for high-energy-density lithium-ion battery. However, increase of Ni content triggers structural instability and fast capacity degradation, which severely impedes the practical application of Ni-rich materials. Here, a surface dual-modification layer of B₂O₃ & LiBO₂ is introduced to Ni-rich material LiNi₀.₈₉Co₀.₀₈Mn₀.₀₃O₂ (NCM89), which successfully stabilizes the layered structure of NCM89 during cycling as well as removes residual lithium in NCM89. The in-situ X-ray diffraction and cross-sectional scanning electron microscopy results demonstrate effectively improved structural reversibility and stability of the cathode. Moreover, the dissolution of transition metals and decomposition of electrolyte at the cathode/electrolyte interface are successfully suppressed, resulting in beneficial cathode electrolyte interphase (CEI) layer. As a result, the boron modified cathode exhibits s a high capacity of 180.4mAh g‾¹ along with an excellent capacity retention of 90% after 100 cycles at 1C in 2.75–4.35 V at 25 °C, while the pristine NCM89 cathode only retains 59% of its initial capacity after 100 cycles. Furthermore, the capacity retention of full cell after 350 cycles is improved from 52.5% to 90%.en© 2022 Elsevier B.V. All rights reserved.Ni-rich layered oxide; Interfacial stability; Capacity degradation; Dual-modification layer; Boron; Structural stabilityJournal article10.1016/j.jpowsour.2022.2315102024-10-22611388Liang, G. [0000-0002-2302-4932]