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

Xuejing Shen, Tao Sun, Lei Yang, Alexey Krasnoslobodtsev, Renat Sabirianov, Michael Sealy, Wai-Ning Mei, Zhanjun Wu () and Li Tan ()
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Xuejing Shen: Dalian University of Technology
Tao Sun: Dalian University of Technology
Lei Yang: Dalian University of Technology
Alexey Krasnoslobodtsev: University of Nebraska
Renat Sabirianov: University of Nebraska
Michael Sealy: University of Nebraska
Wai-Ning Mei: University of Nebraska
Zhanjun Wu: Dalian University of Technology
Li Tan: University of Nebraska

Nature Communications, 2021, vol. 12, issue 1, 1-12

Abstract: 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.

Date: 2021
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-21108-4

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DOI: 10.1038/s41467-021-21108-4

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