Charge-discharge properties of tin dioxide for sodium-ion battery

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Journal Article
Materials Research Bulletin, 2014, 58 pp. 186 - 189
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Tin dioxide was investigated as an anode material for sodium-ion batteries. The Na/SnO 2 cell delivered a first discharge capacity of 747 mAh/g, but the first charge capacity was 150 mAh/g. The irreversible capacity in the first cycle was examined through characterization by X-ray diffraction and scanning electron microscopy. X-ray diffraction analysis revealed that the SnO 2 active material was not reduced fully to metallic Sn. Furrows and wrinkles were formed on the electrode surface owing to the volumetric expansion upon first discharge, which led to a deterioration of the electrode structure and a loss of electrical contact between the active materials. The analysis is summarized in the schematic drawing. © 2014 Elsevier Ltd. All rights reserved.
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