钠离子电池及用电装置
By adding compounds with [Nb6O19]n structural units to the positive electrode film and electrolyte of sodium-ion batteries, lithium ions are captured, solving the problem of deteriorated cycle performance caused by lithium ions mixed in during the production process of sodium-ion batteries, and improving the cycle performance and stability of the batteries.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
- Filing Date
- 2024-03-29
- Publication Date
- 2026-07-17
AI Technical Summary
Sodium-ion batteries are prone to lithium ions getting mixed in during the production process, which leads to a deterioration in cycle performance, and existing technologies are unable to effectively solve this problem.
Adding compounds containing [Nb6O19]n structural units, such as NaxLiyNb6O19 or its hydrated form, to the positive electrode film and/or electrolyte of sodium-ion batteries can capture Li+ in the sodium-ion battery, reduce the possibility of it intercalating into the negative electrode SEI, form a stable lithium niobate salt, and improve cycle performance.
By selectively capturing lithium ions, the likelihood of them embedding into the SEI film on the negative electrode surface is reduced, thus improving the cycle performance of sodium-ion batteries, avoiding the obstruction of sodium ion transport by lithium ions, and enhancing the overall performance of the battery.
Smart Images
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