Superlattice cathodes endow cation and anion co-intercalation for high-energy-density aluminium batteries

Fangyan Cui, Jingzhen Li, Chen Lai, Changzhan Li, Chunhao Sun, Kai Du, Jinshu Wang, Hongyi Li (), Aoming Huang, Shengjie Peng () and Yuxiang Hu ()
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Fangyan Cui: Beijing University of Technology
Jingzhen Li: Beijing University of Technology
Chen Lai: Beijing University of Technology
Changzhan Li: Beijing University of Technology
Chunhao Sun: Beijing University of Technology
Kai Du: Beijing University of Technology
Jinshu Wang: Beijing University of Technology
Hongyi Li: Beijing University of Technology
Aoming Huang: Nanjing University of Aeronautics and Astronautics
Shengjie Peng: Nanjing University of Aeronautics and Astronautics
Yuxiang Hu: Beijing University of Technology

Nature Communications, 2024, vol. 15, issue 1, 1-10

Abstract: Abstract Conventionally, rocking-chair batteries capacity primarily depends on cation shuttling. However, intrinsically high-charge-density metal-ions, such as Al3+, inevitably cause strong Coulombic ion-lattice interactions, resulting in low practical energy density and inferior long-term stability towards rechargeable aluminium batteries (RABs). Herein, we introduce tunable quantum confinement effects and tailor a family of anion/cation co-(de)intercalation superlattice cathodes, achieving high-voltage anion charge compensation, with extra-capacity, in RABs. The optimized superlattice cathode with adjustable van der Waals not only enables facile traditional cation (de)intercalation, but also activates O2– compensation with an extra anion reaction. Furthermore, the constructed cathode delivers high energy-density (466 Wh kg–1 at 107 W kg−1) and one of the best cycle stability (225 mAh g–1 over 3000 cycles at 2.0 A g–1) in RABs. Overall, the anion-involving redox mechanism overcomes the bottlenecks of conventional electrodes, thereby heralding a promising advance in energy-storage-systems.

Date: 2024
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DOI: 10.1038/s41467-024-51570-9

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