Sodium ion battery and preparation method thereof

The invention provides a sodium ion battery and a preparation method thereof, and the sodium ion battery comprises a plurality of negative electrode parts, a plurality of positive electrode parts, a plurality of diaphragms and an electrolyte; wherein each positive electrode part comprises a graphene...

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Hauptverfasser: YUAN JIANGPING, DENG WEITING, DENG ZHISHENG
Format: Patent
Sprache:chi ; eng
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Zusammenfassung:The invention provides a sodium ion battery and a preparation method thereof, and the sodium ion battery comprises a plurality of negative electrode parts, a plurality of positive electrode parts, a plurality of diaphragms and an electrolyte; wherein each positive electrode part comprises a graphene oxide matrix, a nickel-iron-manganese intermediate layer and a cobalt phosphate surface layer which are sequentially overlapped and connected; an electrolysis cavity is defined by every two adjacent diaphragms, at least one negative electrode part and at least one positive electrode part are arranged in each electrolysis cavity in an overlapped mode, and electrolyte is placed in each electrolysis cavity. And the energy density of the battery is effectively improved, so that the battery can store more energy under the condition of unit volume or mass, and the risk of thermal runaway under the condition of high temperature or overcharge can be reduced, thereby improving the safety of the battery. 本发明提出一种钠离子电池及其制备方法,