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Electrochimica Acta

Electrochimica Acta

IF: 5.5
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The Effect of Ionic Chaotropic/Kosmotropic Characters on Polymer Electrodes for Aqueous Dual-Ion Batteries

Published:8 December 2024 DOI: 10.1016/j.electacta.2024.145493
Yitian Su, Lan Chen, Qiangxiang Zhai, Zihao Guo, Wanzhe Ma, Huixin Ren, Meiqiang Fan, Tingli Ma, Min Ling, Lijing Yan

Abstract

Aqueous dual-ion batteries represent an emerging class of energy storage technology, characterized by their strong designability and diverse combinations due to distinct charge storage. The type of ions in the electrolytes plays a crucial role in affecting the electrochemical performance of batteries. However, such a systematic investigation into the effects of electrolyte salts has yet to be reported. This work prepares nine electrolytes to study the differences in electrochemical performance of all-organic aqueous dual-ion batteries by meticulously selecting cations/anions with varying charges and sizes. The results indicate that the chaotropic and kosmotropic characteristics of the ions, determining the polymer-water-ion interaction modes, are the primary considerations required in electrolyte design. Following a thorough comparison, 1M Zn(OTf)2 was identified as the optimal electrolyte for all-organic aqueous dual-ion batteries, demonstrating a capacity retention of 68.4% after 5000 cycles. This work provides intuitive experimental data illustrating the roles of electrolytes in aqueous dual-ion batteries and highlights the importance of electrolyte design in related research fields.

Substances (4)

Materials
Procduct Name CAS Molecular Formula Supplier Price
N,N-Dimethylformamide 68-12-2 C3H7NO 1214 suppliers $11.20-$12200.00
Ethylenediaminetetraacetic acid 60-00-4 C10H16N2O8 1170 suppliers $10.00-$6397.62
Hexane 110-54-3 C6H14 846 suppliers $20.00-$5500.00
Methanol 67-56-1 CH4O 832 suppliers $9.00-$7620.00

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