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Ultra-fast charging in aluminum-ion batteries: electric double layers on active anode.

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^-1. When liquid metal is further used to lower the energy barrier from the anode, fastest charging rate of 10⁴ 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.

SUBMITTER: Shen X

PROVIDER: S-EPMC7864900 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Ultra-fast charging in aluminum-ion batteries: electric double layers on active anode.

Shen Xuejing X Sun Tao T Yang Lei L Krasnoslobodtsev Alexey A Sabirianov Renat R Sealy Michael M Mei Wai-Ning WN Wu Zhanjun Z Tan Li L

Nature communications 20210205 1

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-1. When liquid metal is further used to lower the energy barrier from the anode, fastest charging rate of 104 C (duration of 0.35 s to reach a full capacity) and 500% more specific capacity under high- ...[more]

PMID: 33547316

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