A tellurium iodide perovskite structure enabling eleven-electron transfer in zinc ion batteries

Shixun Wang, Zhiquan Wei, Hu Hong, Xun Guo, Yiqiao Wang, Ze Chen, Dechao Zhang, Xiaoyu Zhang, Xuyong Yang () and Chunyi Zhi ()
Additional contact information
Shixun Wang: 83 Tat Chee Avenue
Zhiquan Wei: 83 Tat Chee Avenue
Hu Hong: 83 Tat Chee Avenue
Xun Guo: 83 Tat Chee Avenue
Yiqiao Wang: 83 Tat Chee Avenue
Ze Chen: 83 Tat Chee Avenue
Dechao Zhang: Hong Kong Center for Cerebro-Cardiovascular Health Engineering (COCHE), Shatin, NT
Xiaoyu Zhang: Jilin University
Xuyong Yang: Key Laboratory of Advanced Display and System Applications of Ministry of Education Shanghai University
Chunyi Zhi: 83 Tat Chee Avenue

Nature Communications, 2025, vol. 16, issue 1, 1-9

Abstract: Abstract The growing potential of low-dimensional metal-halide perovskites as conversion-type cathode materials is limited by electrochemically inert B-site cations, diminishing the battery capacity and energy density. Here, we design a benzyltriethylammonium tellurium iodide perovskite, (BzTEA)2TeI6, as the cathode material, enabling X- and B-site elements with highly reversible chalcogen- and halogen-related redox reactions, respectively. The engineered perovskite can confine active elements, alleviate the shuttle effect and promote the transfer of Cl- on its surface. This allows for the utilization of inert high-valent tellurium cations, eventually realizing a special eleven-electron transfer mode (Te6+/Te4+/Te2-, I+/I0/I-, and Cl0/Cl-) in suitable electrolytes. The Zn||(BzTEA)2TeI6 battery exhibited a high capacity of up to 473 mAh g-1Te/I and a large energy density of 577 Wh kg-1 Te/I at 0.5 A g-1, with capacity retention up to 82% after 500 cycles at 3 A g-1. The work sheds light on the design of high-energy batteries utilizing chalcogen-halide perovskite cathodes.

Date: 2025
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DOI: 10.1038/s41467-024-55385-6

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