A silk fibroin hybrid hydrogel electrolyte enables highly robust aqueous zinc-ion batteries to operate from −60 to 60 °C
4 affiliations
- 1Confucius Energy Storage Lab, School of Energy and Environment, Z Energy Storage Center, Southeast University Nanjing 210096 China
- 2College of Chemistry and Chemical Engineering, National & Local Joint Engineering Laboratory for New Petro-Chemical Materials and Fine Utilization of Resources, Hunan Normal University Changsha 410081 China
- 3State Key Laboratory of Materials-Oriented Chemical Engineering, School of Energy Science and Engineering, Nanjing Tech University Nanjing 211816 China
- 4Department of Chemistry and Biochemistry, University of California Los Angeles CA 90095 USA
Abstract
Aqueous zinc-ion batteries (AZIBs) enable safe and sustainable grid-scale energy storage but are limited by dendrite growth, parasitic reactions, and poor temperature tolerance. Herein, we report a multifunctional silk fibroin/polyacrylamide hydrogel electrolyte (SF/PAM-HGE) enabling stable zinc electrochemistry from −60 to 60 °C. SF β-sheet-mediated network reconstruction enhances the mechanical properties of the hydrogel electrolyte, whereas SF's abundant polar groups disrupt water hydrogen bonds, granting the hydrogel wide-temperature adaptability. In addition, the ligand environment tailored by SF's zincophilic polar groups regulates the Zn2+ solvation structure, facilitates directional Zn2+ transport, and cooperates with preferential interfacial adsorption for guided uniform deposition, thereby suppressing dendrite growth and side reactions. Consequently, the SF/PAM-HGE endows symmetrical Zn cells with stable Zn plating/stripping across a broad temperature range. The Zn‖PANI cells achieve 18 000 cycles with nearly 100% capacity retention at −40 °C and operate stably from −60 to 60 °C. Furthermore, four-electron Zn‖I2 batteries deliver 391.6 mAh g−1 and cycle over 8000 times. Pouch cells also exhibit robust cycling with a high areal capacity of 3.96 mAh cm−2. This work provides a molecular-network design strategy for hydrogel electrolytes toward reliable all-climate AZIBs.
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BibTeX
@article{you2026silk,
title = {{A silk fibroin hybrid hydrogel electrolyte enables highly robust aqueous zinc-ion batteries to operate from −60 to 60 °C}},
author = {Chaolin You and Wenjie Zhang and Weijia Fan and Yi Peng and Tao Wang and Xiongwei Wu and Lijun Fu and Yuping Wu and Xiangfeng Duan},
journal = {Chemical Science},
year = {2026},
month = sep,
doi = {10.1039/d6sc06138a},
url = {https://doi.org/10.1039/d6sc06138a},
note = {CC BY-NC 3.0},
}
RIS
TY - JOUR
TI - A silk fibroin hybrid hydrogel electrolyte enables highly robust aqueous zinc-ion batteries to operate from −60 to 60 °C
AU - Chaolin You
AU - Wenjie Zhang
AU - Weijia Fan
AU - Yi Peng
AU - Tao Wang
AU - Xiongwei Wu
AU - Lijun Fu
AU - Yuping Wu
AU - Xiangfeng Duan
PY - 2026
DA - 2026/09/14
JO - Chemical Science
DO - 10.1039/d6sc06138a
UR - https://doi.org/10.1039/d6sc06138a
AB - Aqueous zinc-ion batteries (AZIBs) enable safe and sustainable grid-scale energy storage but are limited by dendrite growth, parasitic reactions, and poor temperature tolerance. Herein, we report a multifunctional silk fibroin/polyacrylamide hydrogel electrolyte (SF/PAM-HGE) enabling stable zinc electrochemistry from −60 to 60 °C. SF β-sheet-mediated network reconstruction enhances the mechanical properties of the hydrogel electrolyte, whereas SF's abundant polar groups disrupt water hydrogen bonds, granting the hydrogel wide-temperature adaptability. In addition, the ligand environment tailored by SF's zincophilic polar groups regulates the Zn2+ solvation structure, facilitates directional Zn2+ transport, and cooperates with preferential interfacial adsorption for guided uniform deposition, thereby suppressing dendrite growth and side reactions. Consequently, the SF/PAM-HGE endows symmetrical Zn cells with stable Zn plating/stripping across a broad temperature range. The Zn‖PANI cells achieve 18 000 cycles with nearly 100% capacity retention at −40 °C and operate stably from −60 to 60 °C. Furthermore, four-electron Zn‖I2 batteries deliver 391.6 mAh g−1 and cycle over 8000 times. Pouch cells also exhibit robust cycling with a high areal capacity of 3.96 mAh cm−2. This work provides a molecular-network design strategy for hydrogel electrolytes toward reliable all-climate AZIBs.
SN - 2041-6520
SN - 2041-6539
ER -