Journal
ELECTROCHIMICA ACTA
Volume 174, Issue -, Pages 1317-1323Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2015.06.095
Keywords
Anion intercalation; Dual-ion cell; Sodium-based electrolyte; Graphite cathode
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Funding
- company Somont (Umkirch, Germany)
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The stability of aluminum and nickel as a current collector was investigated at high potentials in the presence of 0.5 M NaPF6 or 0.1 M NaBF4 dissolved in EC:DEC (1:1 wt.-%). Cyclovoltammetry showed that nickel is unstable under experimental conditions, whereas aluminum is electrochemically stable and can be used as a current collector. The feasibility of sodium-based dual-ion cells was studied with self-prepared graphite electrodes in the presence of both electrolytes. The cells showed a fairly stable reversible specific capacity of 15 mAh/g for NaBF4 and 55 mAh/g for NaPF6. (C) 2015 Elsevier Ltd. All rights reserved.
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