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• W3082244643 abstract "Layered nickel-rich transition metal oxide has been receiving much attention as high-energy-density cathode materials for rechargeable lithium-ion batteries. However, the severe capacity fading caused by bulk structural degradation of Ni-rich cathodes during lithiation/delithiation obstructs their commercialization. Herein, we modify the LiNi0.92Co0.06Al0.02O2 (NCA92) cathode materials by W6+ cation and BO33− polyanion co-doping to improve the structural stability and upgrade the electrochemical reversibility. The co-doped NCA92 materials show remarkably improved cycling stability at 1 C with a capacity retention of 93.4 % after 100 cycles, whereas the pristine cathodes exhibit poor capacity retention of 53.0 % and suffer severe structural deterioration. Further studies reveal that the particle fragmentation resulted from the inherent internal strain and the structural degradation upon cycling can be effectively mitigated by W6+ cation and BO33− polyanion co-doping. Besides, W6+ and BO33− co-doping could enlarge the interlayer spacing of NCA92, thus increasing lithium-ion diffusion coefficient, which is conducive to enhancing the rate capability. The present work demonstrates that cationic-anionic co-doping is an effective strategy to maintain the structural stability of Ni-rich cathode materials, and it promotes the development of stable cathode materials for high energy density lithium-ion batteries." @default.
• W3082244643 created "2020-09-08" @default.
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• W3082244643 date "2020-09-15" @default.
• W3082244643 modified "2023-10-16" @default.
• W3082244643 title "Stabilizing Ni‐Rich LiNi _0.92 Co _0.06 Al _0.02 O ₂ Cathodes by Boracic Polyanion and Tungsten Cation Co‐Doping for High‐Energy Lithium‐Ion Batteries" @default.
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• W3082244643 doi "https://doi.org/10.1002/celc.202000927" @default.
• W3082244643 hasPublicationYear "2020" @default.
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