Citation: Jinyu Li, Junlei Wang, Shilong Li, Kun Wang. One-step preparation of Mg/Mo co-doped cobalt-free nickel-rich cathode materials with high capacity and long cycle through flame-assisted spray pyrolysis[J]. Chinese Chemical Letters, ;2026, 37(11): 111855. doi: 10.1016/j.cclet.2025.111855 shu

One-step preparation of Mg/Mo co-doped cobalt-free nickel-rich cathode materials with high capacity and long cycle through flame-assisted spray pyrolysis

State Key Laboratory of Engines (Tianjin University), Tianjin 300350, China

lishilong@tju.edu.cn

kwang5@tju.edu.cn

Received Date: 15 July 2025
Revised Date: 10 September 2025
Accepted Date: 17 September 2025
Available Online: 17 September 2025

Figures(3)

Limited by the cobalt scarcity, price fluctuations, and toxicity, the next-generation lithium-ion batteries cathode materials tend to be nickel-rich and cobalt-free. However, the poor cycle stability of cobalt-free nickel-rich cathode material prevents its wide application. Element doping helps to improve the cycle stability of cathode materials, but the introduction of inactive elements usually leads to capacity decay. To address the above difficulties, the present study proposed a Mg/Mo co-doping strategy to simultaneously improve cycle stability and capacity, by developing the method of flame-assisted spray pyrolysis (FASP) for preparation of nanostructured materials in a one-step scheme. The effects of flame temperature on the structure, morphology and electrochemical performance of the material were investigated. Results showed that the doping of Mg-Mo dual-element effectively improved the electrochemical performance of the FASP prepared materials. On the one hand, the dual-element doping reduced the size of primary particles, which inhibited the generation and propagation of microcracks in the bulk and on the surface of the particles, thus helped to achieve long cycle. On the other hand, the dual-element doping expanded the thickness of the Li slab in the cathode material, which combined with smaller primary particles, was conducive to the rapid diffusion of Li⁺ and improved the specific capacity and rate performance. At the same time, the flame temperature was shown to impact the lithium volatilization and particle nucleation. Overall, the findings in the present study provided new ideas for the preparation of the next-generation high performance cobalt-free nickel-rich lithium-ion batteries cathode materials.
- Lithium-ion batteries,
- Cobalt-free nickel-rich cathode materials,
- Mg/Mo co-doping,
- Flame-assisted spray pyrolysis,
- High capacity long cycle
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