Aluminum foil negative electrodes with multiphase microstructure for all-solid-state Li-ion batteries

Yuhgene Liu, Congcheng Wang, Sun Geun Yoon, Sang Yun Han, John A. Lewis, Dhruv Prakash, Emily J. Klein, Timothy Chen, Dae Hoon Kang, Diptarka Majumdar, Rajesh Gopalaswamy and Matthew T. McDowell ()
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Yuhgene Liu: Georgia Institute of Technology
Congcheng Wang: Georgia Institute of Technology
Sun Geun Yoon: Georgia Institute of Technology
Sang Yun Han: Georgia Institute of Technology
John A. Lewis: Georgia Institute of Technology
Dhruv Prakash: Georgia Institute of Technology
Emily J. Klein: Georgia Institute of Technology
Timothy Chen: Georgia Institute of Technology
Dae Hoon Kang: Novelis, Inc.
Diptarka Majumdar: Novelis, Inc.
Rajesh Gopalaswamy: Novelis, Inc.
Matthew T. McDowell: Georgia Institute of Technology

Nature Communications, 2023, vol. 14, issue 1, 1-10

Abstract: Abstract Metal negative electrodes that alloy with lithium have high theoretical charge storage capacity and are ideal candidates for developing high-energy rechargeable batteries. However, such electrode materials show limited reversibility in Li-ion batteries with standard non-aqueous liquid electrolyte solutions. To circumvent this issue, here we report the use of non-pre-lithiated aluminum-foil-based negative electrodes with engineered microstructures in an all-solid-state Li-ion cell configuration. When a 30-μm-thick Al94.5In5.5 negative electrode is combined with a Li6PS5Cl solid-state electrolyte and a LiNi0.6Mn0.2Co0.2O2-based positive electrode, lab-scale cells deliver hundreds of stable cycles with practically relevant areal capacities at high current densities (6.5 mA cm−2). We also demonstrate that the multiphase Al-In microstructure enables improved rate behavior and enhanced reversibility due to the distributed LiIn network within the aluminum matrix. These results demonstrate the possibility of improved all-solid-state batteries via metallurgical design of negative electrodes while simplifying manufacturing processes.

Date: 2023
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DOI: 10.1038/s41467-023-39685-x

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