Construction of double reaction zones for long-life quasi-solid aluminum-ion batteries by realizing maximum electron transfer

Zhijing Yu, Wei Wang (), Yong Zhu, Wei-Li Song, Zheng Huang, Zhe Wang () and Shuqiang Jiao ()
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Zhijing Yu: University of Science and Technology Beijing
Wei Wang: University of Science and Technology Beijing
Yong Zhu: University of Science and Technology Beijing
Wei-Li Song: Beijing Institute of Technology
Zheng Huang: University of Science and Technology Beijing
Zhe Wang: University of Science and Technology Beijing
Shuqiang Jiao: University of Science and Technology Beijing

Nature Communications, 2023, vol. 14, issue 1, 1-11

Abstract: Abstract Achieving high energy density and long cycling life simultaneously remains the most critical challenge for aluminum-ion batteries (AIBs), especially for high-capacity conversion-type positive electrodes suffering from shuttle effect in strongly acidic electrolytes. Herein, we develop a layered quasi-solid AIBs system with double reaction zones (DRZs, Zone 1 and Zone 2) to address such issues. Zone 1 is designed to accelerate reaction kinetics by improving wetting ability of quasi-solid electrolyte to active materials. A composite three-dimensional conductive framework (Zone 2) interwoven by gel network for ion conduction and carbon nanotube network as electronic conductor, can fix the active materials dissolved from Zone 1 to allow for continuing electrochemical reactions. Therefore, a maximum electron transfer is realized for the conversion-type mateials in DRZs, and an ultrahigh capacity (400 mAh g−1) and an ultralong cycling life (4000 cycles) are achieved. Such strategy provides a new perspective for constructing high-energy-density and long-life AIBs.

Date: 2023
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DOI: 10.1038/s41467-023-41361-z

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