He Ya, Chen Zhuo, Feng Junrun, Wang Jian, Zhang Lun, Gu Hao, Sheng Lin, Yao Pengfei, Wang Feng Ryan, Hao Zhangxiang
School of Science, School of Chip Industry, Hubei University of Technology, Wuhan, Hubei, 430068, China.
Materials and Catalysis Laboratory, Department of Chemical Engineering, University College London, London, WC1E 7JE, UK.
Small. 2025 Mar;21(11):e2411755. doi: 10.1002/smll.202411755. Epub 2025 Jan 31.
Aqueous zinc-ion batteries (AZIBs) are considered one of the most promising next-generation energy storage devices due to cost-effectiveness and high safety. However, the uncontrolled dendrite growth and the intolerance against low temperatures hinder the application of AZIBs. Herein, hydrogen-bonding-rich dulcitol (DOL) is introduced into the ZnSO, which reshaped the hydrogen-bond network in the electrolyte and optimized the solvation sheath structure, effectively reducing the amount of active water molecules and inhibiting hydrogen evolution and the parasitic reaction at the zinc anode. In addition, higher adsorption energy DOL preferentially adsorbs on the surface of the zinc anode, guiding the uniform deposition of Zn and inhibiting the formation of dendrites. DOL also enhances the interaction between free and free water and improves the resistance to freeze of the electrolyte. Consequently, the Zn//Zn symmetric cells assembled with DOL are extremely stable cycled for 2000 h at 2 mA cm. The NHVO (NVO)//Zn full cell showed more excellent specific capacity of 183.07 mAh g after 800 cycles. Even at the low temperature of -10 °C, the cell still maintains 155.95 mAh g capacity after 600 cycles. This work provides a new strategy for the subsequent study of AZIBs with high stability at low temperatures.
水系锌离子电池（AZIBs）因其成本效益和高安全性而被认为是最有前途的下一代储能设备之一。然而，不受控制的枝晶生长和对低温的不耐受性阻碍了AZIBs的应用。在此，将富含氢键的木糖醇（DOL）引入硫酸锌电解液中，重塑了电解液中的氢键网络，优化了溶剂化鞘层结构，有效减少了活性水分子的数量，抑制了析氢和锌阳极的寄生反应。此外，具有较高吸附能的DOL优先吸附在锌阳极表面，引导锌的均匀沉积，抑制枝晶的形成。DOL还增强了自由水和游离水之间的相互作用，提高了电解液的抗冻性。因此，用DOL组装的Zn//Zn对称电池在2 mA cm下循环2000 h极其稳定。NHVO（NVO）//Zn全电池在800次循环后表现出更优异的183.07 mAh g的比容量。即使在-10°C的低温下，该电池在600次循环后仍保持155.95 mAh g的容量。这项工作为后续研究在低温下具有高稳定性的AZIBs提供了一种新策略。
