Solid-state battery cell, negative electrode sheet, and preparation method therefor, and related device

CN122177941APending Publication Date: 2026-06-09CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Filing Date
2024-12-06
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Solid-state batteries using carbon materials as anode materials suffer from low initial efficiency and poor cycle performance, mainly due to lithium swallowing caused by oxygen-containing functional groups on the surface of carbon materials and the obstruction of ion/electron transport by binders.

Method used

Carbon materials are treated with cyanoylation and cross-linked with binder precursors of specific structures to generate binders with conjugated structures, reducing oxygen-containing functional groups and forming efficient ion/electron transport networks.

Benefits of technology

It effectively improves the first-efficiency and cycle performance of solid-state batteries by reducing lithium swallowing by oxygen-containing functional groups on the surface of carbon materials and improving the hindering effect of binders on ion/electron transport.

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Abstract

The application relates to the technical field of batteries, in particular to a solid-state battery monomer, a negative electrode sheet and a preparation method thereof, and related devices. The solid-state battery monomer comprises a negative electrode sheet, the negative electrode sheet comprises a negative electrode current collector and a negative electrode active layer arranged on at least one side of the negative electrode current collector, the negative electrode active layer comprises a carbon material and a binder, the binder comprises a structural unit or a tautomer thereof; and the carbon material is connected with the binder. The application can solve the problems of insufficient initial efficiency and cycle performance of the solid-state battery when the carbon material is used as the negative electrode material.
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