Preparation of barium titanate nanowire enhanced in-situ polymerization solid electrolyte and lithium metal battery

By preparing barium titanate nanowire fillers by electrospinning and combining them with cyclic ether polymer monomers to form a polymer solid electrolyte with high dielectric constant, the problems of insufficient ion transport capacity and interface reaction in existing lithium metal batteries are solved, thereby improving the cycle stability and rate performance of lithium metal batteries.

CN121862841APending Publication Date: 2026-04-14BEIJING INST OF TECH
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Patent Information

Application Number
CN202610062096.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-01-17
Publication Date
2026-04-14

AI Technical Summary

Technical Problem

Existing in-situ polymerized solid electrolytes in lithium metal batteries suffer from problems such as low concentration of mobile lithium ions, slow ion migration kinetics, and the tendency of residual monomers in the electrolyte to react with the electrodes. These issues lead to poor lithium dendrite growth, cycle stability, and rate performance, and also pose safety hazards.

Method used

Barium titanate nanowire fillers were prepared by electrospinning and combined with cyclic ether polymer monomers and lithium salts. A polymer solid electrolyte with high dielectric constant was formed by in-situ polymerization. The polarization-induced effect of barium titanate nanowires was used to promote the dissociation of lithium salt, improve ionic conductivity and ion transference number, and optimize the space charge layer at the positive electrode interface.

Benefits of technology

It achieves high ionic conductivity, high ion transference number and wide electrochemical window, improves the cycle stability and rate performance of lithium metal batteries, suppresses lithium dendrite growth, and improves battery safety and electrode interface stability.

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Abstract

The invention discloses preparation of a barium titanate nanowire enhanced in-situ polymerization solid electrolyte and a lithium metal battery, and belongs to the technical field of lithium metal battery polymer solid electrolyte materials. The electrolyte comprises a cyclic ether polymer monomer, a lithium salt and a barium titanate nanowire filler, and the barium titanate nanowire reinforced in-situ polymerization solid electrolyte can be obtained by fully mixing the components in an inert gas atmosphere. The electrolyte has high ionic conductivity, high ionic transference number and wide electrochemical window, so that the lithium metal battery has excellent rate capability and cycling stability.
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