Honeycomb carbon-anchored phosphor-doped lithium cobalt selenide-dioxide carbon dioxide battery cathode material and preparation method

By employing honeycomb carbon-anchored phosphorus-doped cobalt selenide material in lithium carbon dioxide batteries, the problem of low efficiency in the decomposition of lithium carbonate by existing catalytic materials has been solved, resulting in improved performance of lithium carbon dioxide batteries with high specific capacity and good cycle stability.

CN116111119BActive Publication Date: 2026-03-24SHANDONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-02-13
Publication Date
2026-03-24

AI Technical Summary

Technical Problem

Existing lithium carbon dioxide battery cathode catalysts are inefficient in decomposing lithium carbonate, affecting coulombic efficiency and cycle performance. Furthermore, the high cost of precious metal catalysts limits their large-scale application.

Method used

A honeycomb carbon anchored phosphorus-doped cobalt selenide (P-CoSe2@C) material was constructed by freeze-drying and phosphating/selenization under a protective atmosphere. The phosphorus-doped nano-cobalt selenide particles were distributed in the honeycomb carbon, forming a three-dimensional porous structure to improve catalytic activity.

Benefits of technology

It improves the specific capacity and cycle stability of lithium carbon dioxide batteries. The material is simple to prepare, has a unique morphology, and its pores are conducive to mass transfer and electrolyte wettability, thus improving the overall performance of the battery.

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Abstract

The application discloses a honeycomb carbon-anchored phosphorus-doped lithium cobalt selenide-dioxide carbon battery positive electrode material and a preparation method thereof. The base body is a honeycomb carbon structure, and the pore diameter of the honeycomb carbon is 0.5-2 microns. Phosphorus-doped nanometer lithium cobalt selenide particles are uniformly distributed in the honeycomb carbon structure, and the particle size of the phosphorus-doped nanometer lithium cobalt selenide particles is 40-100 nm. The electrode material has simple preparation process and unique morphology. The honeycomb structure is in the micron level, the holes are beneficial to the mass transfer process and the storage of discharge products, and the electrolyte is enhanced in the wettability. The lithium cobalt selenide particles are in the nanometer level, which can effectively increase the specific surface area and expose more catalytic active sites. These advantages are helpful to improve the specific capacity and cycle stability of the lithium dioxide carbon battery.
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Citation Information

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