Issue 15, 2022

Ultrafast charging and ultralong cycle life in solid-state Al-ion batteries

Abstract

Designing and fabricating solid-state batteries with high-rate capability and long cycle life remains a feat. Here, for the first time, a free-standing gel polymer electrolyte (GPE) that exhibits an ultrahigh ionic conductivity of 1.29 × 10−2 S cm−1 is used to regulate the charge transfer between the GPE and Al electrode. Full batteries with a structure of Al/GPE/3D graphene are proved to be stable under current densities from 20 to 200 A g−1, by providing a specific capacity of 122 mA h g−1, a charging rate up to 1000 A g−1 (0.24 s charging time), and a stability over 20 000 cycles. High-flux operations are found to be essential in lowering the energy request during high-rate reactions: not only reducing the surge voltage, but also increasing the energy (237 W h kg−1@20 A g−1) and power density (469 kW kg−1@500 A g−1) in output (>17%).

Graphical abstract: Ultrafast charging and ultralong cycle life in solid-state Al-ion batteries

Supplementary files

Article information

Article type
Paper
Submitted
23 jan 2022
Accepted
28 fev 2022
First published
28 fev 2022

J. Mater. Chem. A, 2022,10, 8178-8185

Ultrafast charging and ultralong cycle life in solid-state Al-ion batteries

X. Shen, T. Sun, Z. Wu and L. Tan, J. Mater. Chem. A, 2022, 10, 8178 DOI: 10.1039/D2TA00630H

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