Designing a Magnesium/Sodium Hybrid Battery Using Hierarchical Iron Selenide Architecture as Cathode Material and Modified Dual-Ion Salts in Ether as Electrolyte

Ting Zhou; Tianli Han; Xirong Lin; Jiamin Liu; Xiangbing Zeng; Peng Zhan; Jinyun Liu; Junjie Niu

doi:10.1021/acs.nanolett.4c00041

Designing a Magnesium/Sodium Hybrid Battery Using Hierarchical Iron Selenide Architecture as Cathode Material and Modified Dual-Ion Salts in Ether as Electrolyte

Nano Lett. 2024 Apr 17;24(15):4400-4407. doi: 10.1021/acs.nanolett.4c00041. Epub 2024 Apr 3.

Authors

Ting Zhou¹, Tianli Han¹, Xirong Lin², Jiamin Liu¹, Xiangbing Zeng³, Peng Zhan³, Jinyun Liu¹, Junjie Niu⁴

Affiliations

¹ Key Laboratory of Functional Molecular Solids, Ministry of Education, College of Chemistry and Materials Science, Anhui Normal University, Wuhu 241002, Anhui, PR China.
² National Key Laboratory of Science and Technology on Micro/Nano Fabrication, Department of Micro/Nano-electronics, Shanghai Jiao Tong University, Shanghai 200240, PR China.
³ Anhui Deeiot Energy Technology Co., Ltd, Wuhu 241002, Anhui, PR China.
⁴ Department of Materials Science and Engineering, University of Wisconsin-Milwaukee, Milwaukee, Wisconsin 53211, United States.

PMID: 38568187
DOI: 10.1021/acs.nanolett.4c00041

Abstract

We developed a magnesium/sodium (Mg/Na) hybrid battery using a hierarchical disk-whisker FeSe₂ architecture (HD-FeSe₂) as the cathode material and a modified dual-ion electrolyte. The polarizable Se^2- anion reduced the Mg²⁺ migration barrier, and the 3D configuration possessed a large surface area, which facilitated both Mg²⁺/Na⁺ cation diffusion and electron transport. The dual-ion salts with NaTFSI in ether reduced the Mg plating/stripping overvoltage in a symmetric cell. The hybrid battery exhibited an energy density of 260.9 Wh kg^-1 and a power density of 600.8 W kg^-1 at 0.2 A g^-1. It showed a capacity retention of 154 mAh g^-1 and a Coulombic efficiency of over 99.5% under 1.0 A g^-1 after 800 long cycles. The battery also displayed outstanding temperature tolerance. The findings of 3D architecture as cathode material and hybrid electrolyte provide a pathway to design a highly reliable Mg/Na hybrid battery.

Keywords: Dual-ion hybrid battery; FeSe2; Magnesium ion battery; Sodium ion battery.