Affiliation:
1. Key Laboratory of Materials Physics Centre for Environmental and Energy Nanomaterials Anhui Key Laboratory of Nanomaterials and Nanotechnology Institute of Solid State Physics Hefei Institutes of Physical Science Chinese Academy of Sciences Hefei 230031 P. R. China
2. University of Science and Technology of China Hefei 230026 P. R. China
3. School of Science Huzhou University Huzhou 313000 P. R. China
Abstract
AbstractFaced with the forthcoming tide of retired lithium‐ion batteries (LIBs), it is imperative to explore effective regeneration and upcycling strategies to alleviate the resource shortage, address environmental pollution, and cater to the demand for high‐energy‐density cathode materials. Herein, a facile, non‐constructive, one‐stone‐for‐three‐birds solid‐phase sintering strategy is proposed to regenerate the degraded LiCoO2 (D‐LCO) cathode and even upgrade its stability at high voltages, in which three birds, i.e., lithium supplement, Li2SO4 coating, and Mn doping into Co sites while N, S doping into Li‐O slabs are simultaneously hit with one stone (one‐pot solid‐phase sintering). Benefiting from these favorable characteristics, the upcycled cathode not only yields high discharge‐specific capacity of 188.2 mAh g−1 at 0.2 C, but also delivers superior cycling performance with 92.5% of capacity retention after 100 cycles (86.4% after 300 cycles) at 0.5 C and excellent rate capability at a high cutoff voltage of 4.5 V, superior to a freshly commercial counterpart. This work is expected to provide meaningful guidance for the upcycling of D‐LCO into high‐energy‐density batteries with long‐term cycling stability.
Funder
National Natural Science Foundation of China
Chinese Academy of Sciences
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment
Cited by
1 articles.
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