Journal
NANO ENERGY
Volume 83, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2021.105854
Keywords
Ni-rich cathode; Microcrack; Lithium-ion batteries; Failure mechanism; Optimized methods
Categories
Funding
- National Key Research and Development Program of China [2019YFC1907805, 2017YFB0102000]
- Science and Technology Innovation Program of Hunan Province [2020RC4005, 2019RS1004]
- Central South University Innovation Driven Project [2020CX007]
- International Postdoctoral Exchange Fellowship Program (Talent-Introduction Program), China Postdoctoral Science Foundation [223764]
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This review discusses the challenges and solutions of modifying Ni-rich layered cathodes specifically for microcrack failure, including mechanisms of microcrack formation and evolution, recent advances in stabilizing the structure/interface of Ni-rich cathodes, and strategies to mitigate microcracks and improve electrochemical performance. Additionally, outlook and perspectives for practical application of Ni-rich layered cathodes in electric vehicles are provided.
Ni-rich layered transition metal oxide is one of the most promising cathode materials for the next generation lithium-based automotive batteries due to its excellent electrochemical performances. Nevertheless, its further applications are capped by the structural/interfacial instability during the prolonged charging/discharging, leading to severe performance fading and serious safety concerns. Here, we provide a comprehensive review about challenges and solutions to modify Ni-rich layered cathodes specifically for microcrack failure. Firstly, the mechanism of microcrack formation and evolution are concluded thoroughly. Secondly, recent advances in stabilizing the structure/interface of Ni-rich cathodes are summarized such as surface coating, cation/anion doping, composition tailoring, morphology engineering and electrolytes optimization. Furthermore, strategies to mitigate the microcrack and then boost the electrochemical performance of Ni-rich cathodes at the chemical & mechanical engineering level are presented. More importantly, outlook and perspectives to facilitate the practical application of Ni-rich layered cathodes toward electrical vehicle application are provided as well.
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