Zhang Qiuxia, Wan Linfeng, Gao Xuan, Cheng Shaoheng, Gao Nan, Carmalt Claire J, Dai Yuhang, He Guanjie, Li Hongdong
State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, PR China.
Christopher Ingold Laboratory, Department of Chemistry, University College London, London, WC1H 0AJ, U.K.
ACS Appl Mater Interfaces. 2024 Dec 18;16(50):69388-69397. doi: 10.1021/acsami.4c15737. Epub 2024 Dec 9.
Aqueous zinc-ion batteries (AZIBs) have garnered widespread attention due to their promising development and application prospects. However, progress of AZIBs has been hindered by zinc (Zn) dendrites and side reactions at the electrode-electrolyte interface (EEI). In particular, the large and uneven pores of commercial glass fiber (GF) separators lead to nonuniform Zn transport, which causes side reactions. In this study, we employed nanodiamonds (NDs) to regulate the separator pore structure and utilized its surface oxygen-containing functional groups to control the Zn transport properties. Due to their excellent chemical inertness, superhardness, ultrahigh thermal conductivity, and abundant surface functional groups, NDs modified GF separators for dendrite-free and high-performance AZIBs. Experimental outcomes demonstrate that Zn||Zn symmetric cells using NDs-GF separators exhibit regular charge-discharge profiles, minimal fluctuations, and an ultralong cycling lifespan of nearly 1800 h under a current density of 5 mA cm with a capacity density of 1 mAh cm and 240 h under a high current density of 10 mA cm with a capacity density of 10 mAh cm. The Zn||MnO full cells using NDs-GF separators showcase a high retention after 1000 cycles at 1 A g. This research proposes a modification method for developing advanced separators in AZIBs technology.
水系锌离子电池（AZIBs）因其具有广阔的发展和应用前景而受到广泛关注。然而，锌（Zn）枝晶以及电极-电解质界面（EEI）处的副反应阻碍了AZIBs的发展。特别是，商业玻璃纤维（GF）隔膜的大孔和不均匀孔隙导致锌传输不均匀，从而引发副反应。在本研究中，我们采用纳米金刚石（NDs）来调节隔膜的孔隙结构，并利用其表面含氧官能团来控制锌的传输特性。由于其优异的化学惰性、超硬度、超高热导率和丰富的表面官能团，NDs修饰的GF隔膜可用于无枝晶且高性能的AZIBs。实验结果表明，使用NDs-GF隔膜的Zn||Zn对称电池在电流密度为5 mA cm、容量密度为1 mAh cm时，呈现出规则的充放电曲线，波动极小，循环寿命长达近1800 h；在电流密度为10 mA cm、容量密度为10 mAh cm的高电流密度下，循环寿命为240 h。使用NDs-GF隔膜的Zn||MnO全电池在1 A g下经过1000次循环后仍具有较高的容量保持率。本研究提出了一种在AZIBs技术中开发先进隔膜的改性方法。
