Mechanical & Materials Engineering, Department of

 

Document Type

Article

Date of this Version

2021

Citation

NATURE COMMUNICATIONS (2021) 12:820

https://doi.org/10.1038/s41467-021-21108-4

Comments

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License,

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.

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