Enhanced Aqueous Zinc-Ion Batteries Using 3D MoS 2 /Conductive Polymer Composite

Tongxin Jiang, Sijie Li, Zexiang Luo, Xue Li, Lifeng Zhang, Haisheng San (), Xin Li () and Yifei Ma ()
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Tongxin Jiang: Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
Sijie Li: China Institute of Atomic Energy, Beijing 102413, China
Zexiang Luo: Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
Xue Li: China Institute of Atomic Energy, Beijing 102413, China
Lifeng Zhang: China Institute of Atomic Energy, Beijing 102413, China
Haisheng San: Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen 361005, China
Xin Li: China Institute of Atomic Energy, Beijing 102413, China
Yifei Ma: State Key Laboratory of Quantum Optics and Quantum Optics Devices, Institute of Laser Spectroscopy, Collaborative Innovation Center of Extreme Optics, Shanxi University, Taiyuan 030006, China

Energies, 2024, vol. 18, issue 1, 1-11

Abstract: MoS 2 , a typical transition metal dichalcogenide, features a layered structure, multi-phase transition, and tunable band gap, which is a promising candidate for aqueous zinc-ion batteries (AZIBs). Recent studies have focused on the metastable 1T-MoS 2 phase, which exhibits superior electrical conductivity and electrochemical activity compared to the more stable 2H phase. Herein, a straightforward one-step hydrothermal method was used to synthesize three-dimensional MoS 2 /polymer composites (H-MoS 2 -PEDOT). Under acidic conditions, the polymerization and intercalation of EDOT molecules in the MoS 2 layers promote the phase transition from 2H to 1T, thereby enhancing its conductivity and electrochemical performance. Additionally, it was found that the intercalated PEDOT and small amounts of water molecules have contributed to enhancing Zn 2+ ion diffusion and cycle stability. As a result, AZIBs based on the H-MoS 2 -PEDOT composite deliver a high specific capacity of 173.6 mAh g −1 at 1 A g −1 , maintaining a specific capacity of 116 mAh g −1 and a capacity retention of 82.8% after 1000 cycles at 5 A g −1 .

Keywords: aqueous zinc-ion battery; MoS 2; PEDOT; molecular intercalation; reaction kinetics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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