A rechargeable Na–CO 2 /O 2 battery enabled by stable nanoparticle hybrid electrolytes

Shaomao Xu, Yingying Lu, Hongsen Wang, Héctor D. Abruña, Lynden A. Archer

Research output: Contribution to journalArticlepeer-review

64 Scopus citations

Abstract

© the Partner Organisations 2014. We report on rechargeable batteries that use metallic sodium as the anode, a mixture of CO2 and O2 as the active material in the cathode, and an organic-inorganic hybrid liquid as electrolyte. The batteries are attractive among energy storage technologies because they provide a mechanism for simultaneously capturing CO2 emissions while generating electrical energy. Through in and ex situ chemical analysis of the cathode we show that NaHCO3 is the principal discharge product, and that its relative instability permits cell recharging. By means of differential electrochemical mass spectrometry (DEMS) based on 12C and 13C we further show that addition of as little as 10% of 1-methyl-3-propylimidazolium bis(trifluoromethanesulfone)imide ionic liquid tethered to SiO2 nanoparticles extends the high-voltage stability of the electrolyte by at least 1 V, allowing recharge of the Na-CO2/O2 cells. This journal is
Original languageEnglish (US)
Pages (from-to)17723-17729
Number of pages7
JournalJ. Mater. Chem. A
Volume2
Issue number42
DOIs
StatePublished - Sep 10 2014
Externally publishedYes

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