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US 12,763,331 B2Granted
Sodium ion secondary battery
AssigneeToyota Jidosha Kabushiki Kaisha
InventorsKeita Niitani, Shin Ushiroda, Hiroko Kuwata, Masato Hozumi
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Abstract
A sodium ion secondary battery includes a cyclic organic compound as an active material and a complex hydride as a solid electrolyte, wherein the cyclic organic compound has at least two carbonyl groups —C(═O)—, the at least two carbonyl groups are bonded via a single bond or at least one conjugated double bond, and the complex hydride includes a Na cation and a complex ion containing H.
Claims8
A method of producing a sodium ion secondary battery, comprising:
- compositing Na2C8H4O4 and crystalline carbon fibers to obtain a composite;
- preparing a complex hydride having a composition of Na(CB9H10)0.7(CB11H12)0.3;
- preparing a negative electrode mixture by mixing the composite, the complex hydride, and additional crystalline carbon fibers;
- forming a solid electrolyte layer by pressing the complex hydride;
- forming a negative electrode active material layer on the solid electrolyte layer by pressing the negative electrode mixture;
- and
- forming a positive electrode active material layer such that the solid electrolyte layer is disposed between the positive electrode active material layer and the negative electrode active material layer.
4 more elements
Dependencies are inferred from the claim text.