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Boosting Zinc Electrode Reversibility in Aqueous Electrolytes by Using Low-Cost Antisolvents

Journal Article


Abstract


  • Antisolvent addition has been widely studied in crystallization in the pharmaceutical industries by breaking the solvation balance of the original solution. Here we report a similar antisolvent strategy to boost Zn reversibility via regulation of the electrolyte on a molecular level. By adding for example methanol into ZnSO4 electrolyte, the free water and coordinated water in Zn2+ solvation sheath gradually interact with the antisolvent, which minimizes water activity and weakens Zn2+ solvation. Concomitantly, dendrite-free Zn deposition occurs via change in the deposition orientation, as evidenced by in situ optical microscopy. Zn reversibility is significantly boosted in antisolvent electrolyte of 50 % methanol by volume (Anti-M-50 %) even under harsh environments of −20 °C and 60 °C. Additionally, the suppressed side reactions and dendrite-free Zn plating/stripping in Anti-M-50 % electrolyte significantly enhance performance of Zn/polyaniline coin and pouch cells. We demonstrate this low-cost strategy can be readily generalized to other solvents, indicating its practical universality. Results will be of immediate interest and benefit to a range of researchers in electrochemistry and energy storage.

UOW Authors


Publication Date


  • 2021

Citation


  • Hao, J., Yuan, L., Ye, C., Chao, D., Davey, K., Guo, Z., & Qiao, S. Z. (2021). Boosting Zinc Electrode Reversibility in Aqueous Electrolytes by Using Low-Cost Antisolvents. Angewandte Chemie - International Edition, 60(13), 7366-7375. doi:10.1002/anie.202016531

Scopus Eid


  • 2-s2.0-85101517715

Web Of Science Accession Number


Start Page


  • 7366

End Page


  • 7375

Volume


  • 60

Issue


  • 13

Abstract


  • Antisolvent addition has been widely studied in crystallization in the pharmaceutical industries by breaking the solvation balance of the original solution. Here we report a similar antisolvent strategy to boost Zn reversibility via regulation of the electrolyte on a molecular level. By adding for example methanol into ZnSO4 electrolyte, the free water and coordinated water in Zn2+ solvation sheath gradually interact with the antisolvent, which minimizes water activity and weakens Zn2+ solvation. Concomitantly, dendrite-free Zn deposition occurs via change in the deposition orientation, as evidenced by in situ optical microscopy. Zn reversibility is significantly boosted in antisolvent electrolyte of 50 % methanol by volume (Anti-M-50 %) even under harsh environments of −20 °C and 60 °C. Additionally, the suppressed side reactions and dendrite-free Zn plating/stripping in Anti-M-50 % electrolyte significantly enhance performance of Zn/polyaniline coin and pouch cells. We demonstrate this low-cost strategy can be readily generalized to other solvents, indicating its practical universality. Results will be of immediate interest and benefit to a range of researchers in electrochemistry and energy storage.

UOW Authors


Publication Date


  • 2021

Citation


  • Hao, J., Yuan, L., Ye, C., Chao, D., Davey, K., Guo, Z., & Qiao, S. Z. (2021). Boosting Zinc Electrode Reversibility in Aqueous Electrolytes by Using Low-Cost Antisolvents. Angewandte Chemie - International Edition, 60(13), 7366-7375. doi:10.1002/anie.202016531

Scopus Eid


  • 2-s2.0-85101517715

Web Of Science Accession Number


Start Page


  • 7366

End Page


  • 7375

Volume


  • 60

Issue


  • 13