Lithium sodium titanium phosphate negative electrode material and aqueous lithium-iodine battery based on same

By using sodium titanium phosphate lithium anode material and an optimized electrolyte formulation, the shortcomings of existing aqueous lithium iodine batteries in terms of cycle performance, safety, and rate performance have been overcome, achieving high-performance electrochemical properties and environmental friendliness, making them suitable for new energy vehicles and distributed energy storage systems.

CN122091571APending Publication Date: 2026-05-26HUBEI ENG UNIV
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Patent Information

Application Number
CN202411704087.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-26
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing aqueous lithium-iodine batteries have shortcomings in terms of cycle performance, capacity retention, safety, and rate performance, making it difficult to meet the needs of high-performance energy storage devices.

Method used

Using lithium sodium titanium phosphate as the negative electrode and activated carbon as the positive electrode, and employing an aqueous electrolyte containing lithium ions and iodide ions, the battery's cycle stability and safety are improved by optimizing the electrode materials and electrolyte formulation to reduce the shuttle effect of iodide ions.

Benefits of technology

It achieves high cycle stability, long life, high safety and excellent rate performance, and is suitable for new energy vehicles and distributed energy storage systems, meeting the requirements of green production.

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Abstract

The invention provides a lithium sodium titanium phosphate negative electrode material and an aqueous lithium-iodine battery based on the same, and belongs to the technical field of secondary batteries. The chemical formula of the lithium sodium titanium phosphate negative electrode material is Li < x > Na < y > Ti < 2 > (PO4) 3, x is less than or equal to 1, y is (1-x) and has an NASICON type structure; the lithium sodium titanium phosphate negative electrode material is an excellent fast ion conductor, and the three-dimensional rigid framework structure of the lithium sodium titanium phosphate negative electrode material can effectively promote diffusion of ions and improve the electrochemical performance, so that the safety, the cycling stability and the rate capability of the battery are greatly improved. According to the aqueous lithium-iodine battery based on the lithium sodium titanium phosphate negative electrode material, active carbon is used as a positive electrode active material, an aqueous solution containing lithium ions and iodide ions is used as an electrolyte, and the battery has excellent electrochemical performance, cycling stability and safety; the problem that the lithium-iodine battery in the prior art cannot meet the requirements of good cycle performance, high capacity retention, high safety and excellent rate capability at the same time is solved.
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