High‐performant all‐organic aqueous sodium‐ion batteries enabled by PTCDA electrodes and a hybrid Na/Mg electrolyte

Karlsmo, Martin, 1995 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Bouchal, Roza, 1990 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Johansson, Patrik, 1969 (författare): Alistore - European Research Institute,Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

2021-10-12
2021
Engelska.
Ingår i: Angewandte Chemie - International Edition. - : Wiley. - 1433-7851 .- 1521-3773. ; 60:46, s. 24709-24715

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Abstract Ämnesord

Stäng

Aqueous sodium-ion batteries (ASIBs) are aspiring candidates for low environmental impact energy storage, especially when using organic electrodes. In this respect, perylene-3,4,9,10-tetracarboxylic dianhydride (PTCDA) is a promising anode active material, but it suffers from extensive dissolution in conventional aqueous electrolytes. As a remedy, we here present a novel aqueous electrolyte, which inhibits the PTCDA dissolution and enables their use as all-organic ASIB anodes with high capacity retention and Coulombic efficiencies. Furthermore, the electrolyte is based on two, hence “hybrid”, inexpensive and non-fluorinated Na/Mg-salts, it displays favourable physico-chemical properties and an electrochemical stability window >3 V without resorting to the extreme salt concentrations of water-in-salt electrolytes. Altogether, this paves the way for ASIBs with both relatively high energy densities, inexpensive total cell chemistries, long-term sustainability, and improved safety.

Av författaren/redakt...: Karlsmo, Martin, ...; Bouchal, Roza, 1 ...; Johansson, Patri ...

Om ämnet

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