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| Research progress on core-shell heterostructure high-nickel cathode materials |
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Received:December 13, 2024
Revised:December 13, 2024
Accepted:December 16, 2024
Published Online:January 21, 2025
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| DOI： |
| KeyWord:lithium-ion batteries; Ni-rich cathode material; core shell heterostructure; concentration gradient; interface stability. |
| Author | Institution |
| WANG Jingpeng |
BGRIMM Technology Group |
| ZHANG xuequan |
BGRIMM Technology Group |
| LIU Yafei |
BGRIMM Technology Group |
| CHEN Yanbin |
BGRIMM Technology Group |
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| Abstract: |
| The rapid development of new energy vehicles and low altitude economy has put forward increasingly high requirements for power supply systems. Existing lithium-ion batteries are difficult to meet the new market application needs in terms of energy density and safety. The high nickel material LiNi1-x-yCoxMnyO2 (x>0.8) combines the advantages of high specific energy, high energy efficiency, and long cycle life, making it a highly promising cathode material for lithium-ion batteries. However, it is prone to cation mixing, microcracks inside the particles, oxygen evolution and transition metal dissolution, irreversible phase transition during the delithiation process, leading to a decrease in battery performance. This paper focuses on the surface interface issues and formation mechanisms of high-nickel materials, briefly introducing common material modification methods. It compares the effects of structural designs such as core-shell structures, semi-concentration gradients, full concentration gradients, and double concentration gradients on battery cycling and safety performance improvements. On this basis, the development direction of core-shell heterogeneous materials is forecasted. |
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