全电池中负极活性物质有效放电比容量的测定方法
By combining half-cell testing and conversion coefficient adjustment with full-cell design and observation of deposited metals, the problem of determining the effective discharge specific capacity of the negative electrode active material in a full cell has been solved, realizing a rapid and accurate determination method applicable to sodium-ion and lithium-ion batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- HUNAN DESAY BATTERY CO LTD
- Filing Date
- 2026-04-08
- Publication Date
- 2026-07-17
AI Technical Summary
Existing technologies make it difficult to accurately determine the effective discharge specific capacity of negative electrode active materials in full cells, especially in hard carbon negative electrode active materials, where factors such as sodium insertion/deposition mechanisms make measurement difficult.
The charging specific capacity of the negative electrode active material is obtained by half-cell testing. The conversion coefficient is then adjusted to the estimated discharge specific capacity of the full cell. Combined with the full cell design with a preset N/P value of less than 1, a small number of full-charge tests and disassembly are carried out to observe the metal precipitation at the negative electrode interface and determine the effective discharge specific capacity.
It enables rapid and accurate determination of the effective discharge specific capacity of the negative electrode active material in a full battery, reduces the number of experiments, saves costs, and is applicable to sodium-ion and lithium-ion batteries, with wide application in different material systems.
Smart Images
Figure CN121978565B_ABST