Concept and electrochemical mechanism of an Al metal anode - organic cathode battery
Artikel i vetenskaplig tidskrift, 2020

Aluminum (Al) batteries are fundamentally a promising future post-Li battery technology. The recently demonstrated concept of an Al-graphite battery represents some significant progress for the technology, but the cell energy density is still very modest and limited by the quantity of the AlCl3 based electrolyte, as it relies on AlCl4- intercalation. For further progress, cathode materials capable of an electrochemical reaction with Al positively charged species are needed. Here such a concept of an Al metal anode - organic cathode battery based on anthraquinone (AQ) electrochemistry with a discharge voltage of 1.1 V is demonstrated. Further improvement of both the cell capacity retention and rate capability is achieved by nano-structured and polymerized cathodes. The intricate electrochemical mechanism is proven to be that the anthraquinone groups undergo reduction of their carbonyl bonds during discharge and become coordinated by AlCl2+ species. Altogether the Al metal anode - AQ cathode cell has almost the double energy density of the state-of-the-art Al-graphite battery.

Aluminum batteries

Organic cathode

Energy Storage

Mechanism

Operando ATR-IR

Författare

Jan Bitenc

Natl Inst Chem

Niklas Lindahl

Göteborgs universitet, Institutionen för fysik

Chalmers, Fysik, Materialfysik

Alen Vizintin

Natl Inst Chem

Muhammad Abdelhamid

Chalmers, Fysik, Materialfysik

Robert Dominko

Natl Inst Chem

Centre national de la recherche scientifique (CNRS)

Univerza V Ljubljani

Patrik Johansson

Chalmers, Fysik, Materialfysik

Centre national de la recherche scientifique (CNRS)

Energy Storage Materials

2405-8297 (eISSN)

Vol. 24 379-383

Ämneskategorier

Oorganisk kemi

Materialkemi

Annan kemiteknik

DOI

10.1016/j.ensm.2019.07.033

Mer information

Senast uppdaterat

2020-08-28