Highly rechargeable aqueous Sn-metal-based hybrid-ion batteries

Highly rechargeable aqueous Sn-metal-based hybrid-ion batteries

Tin (Sn) metal, with its intrinsic resistance to the hydrogen evolution reaction (HER), holds great promise as an anode for safe and rechargeable aqueous Sn-metal batteries (ASBs). However, the major challenges for their practical deployment include uneven Sn deposition and low Sn2+/Sn4+ reaction re...

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Bibliographic Details
Main Authors: Xiao, Tao, Liu, Lingli, Liu, Huan, Li, Ting, Cai, Da-Qian, Lew, Wen Siang, Zhang, Yongqi, Bao, Haoming, Yang, Jin-Lin, Fan, Hong Jin
Other Authors: School of Physical and Mathematical Sciences
Format: Article
Language:English
Published: 2025
Subjects:
Physics
Sn metal
Aqueous batteries
Online Access:https://hdl.handle.net/10356/182656
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Institution: Nanyang Technological University
Language: English
Description
Summary:Tin (Sn) metal, with its intrinsic resistance to the hydrogen evolution reaction (HER), holds great promise as an anode for safe and rechargeable aqueous Sn-metal batteries (ASBs). However, the major challenges for their practical deployment include uneven Sn deposition and low Sn2+/Sn4+ reaction reversibility. To mitigate these challenges, we design ASBs from both anode and electrolyte. First, a stannophilic silver-coated vertical graphene (Ag-VG) host improves the nucleation kinetics and uniform Sn deposition. Second, a biphasic H2O/ionic liquid (IL) electrolyte confines Sn2+ within the aqueous phase, suppressing the formation of Sn4+ at the cathode side and eliminating the usage of an ion exchange membrane. The biphasic electrolyte and Ag-VG host are coupled with various types of cathodes (herein, halogens, LiCoO2, and Li2MnO4) to fabricate full ASBs. Improved cycling stability and Coulombic efficiency are clearly observed. This work highlights a facile strategy for advancing ASBs.

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