Ultra-fast charging in aluminum-ion batteries: electric double layers on active anode.
basic_science · Level V
Where this comes from
- Record sourced from PubMed, PMID 33547316.
- Also identified by DOI 10.1038/s41467-021-21108-4 and PMC identifier 7864900.
- Licence recorded as CC BY.
- The licence permits redistribution, so the abstract is shown in full and the full text is available from the publisher.
Abstract
With the rapid iteration of portable electronics and electric vehicles, developing high-capacity batteries with ultra-fast charging capability has become a holy grail. Here we report rechargeable aluminum-ion batteries capable of reaching a high specific capacity of 200 mAh g<sup>-1</sup>. When liquid metal is further used to lower the energy barrier from the anode, fastest charging rate of 10<sup>4</sup> C (duration of 0.35 s to reach a full capacity) and 500% more specific capacity under high-rate conditions are achieved. Phase boundaries from the active anode are believed to encourage a high-flux charge transfer through the electric double layers. As a result, cationic layers inside the electric double layers responded with a swift change in molecular conformation, but anionic layers adopted a polymer-like configuration to facilitate the change in composition.