Journal
ELECTROCHEMISTRY COMMUNICATIONS
Volume 45, Issue -, Pages 52-55Publisher
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2014.05.012
Keywords
Na-ion batteries; Organic electrode materials; N-cyclic structures; Pyromellitic diimidate
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Funding
- Swedish Foundation for Strategic Research
- STandUP for Energy
- Carl Trygger Foundation
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A novel organic Na-salt is presented here for utilization as an active electrode material in rechargeable Na-ion batteries. The compound, disodium pyromellitic diimidate, is synthesized through a reaction by pyromellitic acid and sodium hydride and characterized using H-1-NMR. Na-batteries of the organic compound were able to obtain capacity values close to the theoretical during the first cycles, but a steady capacity decrease could be observed during cycling. The battery nevertheless delivered a capacity of ca 90 mAh/g after 100 cycles, rendering it a comparatively competitive organic Na-battery material. However, the results stress the importance of tailoring Na-compounds with a good chemical stability also at high levels of sodiation, since decomposition side-reactions can be probable. (C) 2014 Elsevier B.V. All rights reserved.
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