25-04-2023 дата публикации
Номер: CN116014225A
Принадлежит:
The invention provides a sodium ion battery, which comprises a positive plate, a negative plate, a diaphragm and an electrolyte, the diaphragm is located between the positive plate and the negative plate, the diaphragm comprises a base membrane and a ceramic coating arranged on one side, facing the positive plate, of the base membrane, the ceramic coating comprises a ceramic material, and the ceramic material is arranged between the positive plate and the negative plate. The surface of the ceramic material has a metal-hydroxyl group, and the electrolyte comprises an ether solvent. Therefore, the ether solvent in the electrolyte can be adsorbed through the diaphragm, the oxidation-resistant stability of the ether solvent is improved while the good reduction-resistant stability of the ether solvent is maintained, and the ether solvent is prevented from being oxidized and decomposed, so that the energy efficiency and the fast charging performance of the sodium-ion battery are improved.
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