A lithium-rich disordered rock-salt transition metal oxyfluoride negative electrode material, a preparation method thereof and application thereof in capacitors
By preparing lithium-rich disordered rock salt transition metal fluoride oxide anode materials, the problem of the mismatch between positive and negative electrode dynamics in lithium-ion capacitors was solved, achieving a balance between high energy density and high power density, and exhibiting excellent cycle stability and fast charge-discharge characteristics.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- SHANDONG UNIV
- Filing Date
- 2026-02-25
- Publication Date
- 2026-06-02
AI Technical Summary
Existing lithium-ion capacitors suffer from a mismatch between positive and negative electrode dynamics, leading to a decrease in voltage and energy density. Furthermore, the high intercalation potential of existing pseudocapacitive materials limits the performance of lithium-ion batteries and lithium-ion capacitors.
The lithium-rich disordered rock salt transition metal fluoride oxide anode material LixMOyFz is adopted. The lithium storage potential is reduced by the modification effect of F element, and the crystal structure stability is enhanced. The disordered rock salt structure is formed by pre-intercalation of lithium through constant current charge-discharge cycle method, which improves cycle life and ion transport rate.
It achieves a balance between high energy density and high power density in lithium-ion capacitors at low potentials, solves the problem of mismatch between positive and negative electrode dynamics, and provides excellent cycle stability and fast charge and discharge characteristics.
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Figure CN122126879A_ABST