Abstract

Sodium–nickel chloride batteries have been used as energy storage devices because of their high operating voltage, ease of assembly in a discharged state, the less corrosive nature of the cathode materials, safer cell failure mode, and better tolerance against overcharging. In this study, we fabricated a planar‐type cell equipped with an elastic spring rod in the anode to maintain effective sodium utilization. In addition, we investigated the influence of carbon coating on the β″‐Al2O3 membrane. The carbon coating layer on the β″‐Al2O3 membrane showed improved wettability for sodium metal. The carbon‐coated alumina membrane delivered a higher initial charge/discharge capacity than the pristine membrane cells.

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