Journal
ACS APPLIED ENERGY MATERIALS
Volume 2, Issue 10, Pages 6960-6966Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsaem.9b01234
Keywords
polymer electrolyte; ionogel; sodium battery; photopolymerization; ionic conductivity; solid-state battery
Funding
- European Research Council by Starting Grant Innovative Polymers for Energy Storage (iPes) [306250]
- Basque Government through Project ELKARTEK17
- Spanish Ministerio de Economia y Competitividad (MINECO) though AffINIty [ENE2016-75242-R]
- European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie Grant [797295]
- MINECO [BES-2017-079766]
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A simple method to prepare a mechanically robust ionogel film by fast (<1 min) UV photopolymerization of poly(ethylene glycol) diacrylate in the presence of an ionic liquid electrolyte based on N-propylN-methylpyrrolidinium bis(fluorosulfonyl)imide and sodium bis(fluorosulfonyl)imide is demonstrated. The ionogels showed very high ionic conductivity at 50 degrees C (6.5 x 10(-3) S.cm(-1)) close to the liquid counterpart (7.8 X 10(-3) S.cm(-1)). High salt concentration in the ionogels was beneficial for the sodium plating and stripping. Na/ionogel/NaFePO4 full cells delivered a high specific capacity of 152 mAh g(-1) at 50 degrees C with good capacity retention.
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