Lithium-supplementing agent and preparation method therefor, positive electrode sheet, battery, battery pack, and electric device
WO2026149367A1PCT designated stage Publication Date: 2026-07-16BYD CO LTD
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- BYD CO LTD
- Filing Date
- 2026-01-05
- Publication Date
- 2026-07-16
AI Technical Summary
Technical Problem
Existing lithium nickelate supplements have poor environmental tolerance in air, which affects their lithium supplementation effect. Furthermore, traditional synthesis methods result in low purity and poor lithium supplementation performance.
Method used
A lithium supplement is prepared by using nitrogen-doped lithium nickelate as the core and coating it with lithium nitride and a conductive carbon shell. The environmental tolerance and lithium supplementation capacity are improved by controlling the heat treatment process.
Benefits of technology
It enhances the environmental stability and lithium replenishment capacity of the lithium replenishing agent, improves the initial capacity and energy output of the battery, and extends the battery's lifespan.
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Smart Images
Figure CN2026070649_16072026_PF_FP_ABST
Abstract
The present application provides a lithium-supplementing agent and a preparation method therefor, a positive electrode sheet, a battery, a battery pack, and an electric device. The lithium-supplementing agent comprises an inner core and lithium nitride, which is located on at least part of the surface of the inner core, wherein the inner core comprises nitrogen-doped lithium nickel oxide. The lithium-supplementing agent provided in the present application, by limiting the inner core and lithium nitride on the surface of part of the inner core, can solve the problem of the poor environmental tolerance of the lithium-supplementing agent, and can also ensure that same has a relatively high lithium-supplementing capacity, which helps a battery achieve a higher energy output.
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