Dai Chunlong, Hu Linyu, Jin Xuting, Wang Ying, Wang Rui, Xiao Yukun, Li Xiangyang, Zhang Xinqun, Song Li, Han Yuyang, Cheng Huhu, Zhao Yang, Zhang Zhipan, Liu Feng, Jiang Lan, Qu Liangti
Key Laboratory of Cluster Science, Ministry of Education, Beijing Key Laboratory of Photoelectronic/Electrophotonic Conversion Materials, School of Chemistry and Chemical Engineering, Beijing Institute of Technology, Beijing 100081, P. R. China.
Key Laboratory for Advanced Materials and Joint International Research Laboratory of Precision Chemistry and Molecular Engineering, Feringa Nobel Prize Scientist Joint Research Center, Frontiers Science Center for Materiobiology and Dynamic Chemistry, Institute of Fine Chemicals, School of Chemistry and Molecular Engineering, East China University of Science and Technology, Shanghai 200237, P. R. China.
Sci Adv. 2022 Jul 15;8(28):eabo6688. doi: 10.1126/sciadv.abo6688. Epub 2022 Jul 13.
Microbatteries (MBs) are promising candidates to provide power for various miniaturized electronic devices, yet they generally suffer from complicated fabrication procedures and low areal energy density. Besides, all cathodes of current MBs are solid state, and the trade-off between areal capacity and reaction kinetics restricts their wide applications. Here, we propose a dual-plating strategy to facilely prepare zinc-bromine MBs (Zn-Br MBs) with a liquid cathode to achieve both high areal energy density and fast kinetics simultaneously. The Zn-Br MBs deliver a record high areal energy density of 3.6 mWh cm, almost an order of magnitude higher than available planar MBs. Meanwhile, they show a polarity-switchable feature to tolerate confusion of cathode and anode. This strategy could also be extended to other battery systems, such as Zn-I and Zn-MnO MBs. This work not only proposes an effective construction method for MBs but also enriches categories of microscale energy storage devices.
微型电池（MBs）有望为各种小型电子设备供电，但它们通常存在制造工艺复杂和面积能量密度低的问题。此外，目前微型电池的所有阴极都是固态的，面积容量与反应动力学之间的权衡限制了它们的广泛应用。在此，我们提出一种双电镀策略，以简便地制备具有液体阴极的锌溴微型电池（Zn-Br MBs），从而同时实现高面积能量密度和快速动力学。Zn-Br MBs的面积能量密度达到创纪录的3.6 mWh/cm²，几乎比现有的平面微型电池高一个数量级。同时，它们具有极性可切换的特性，能够容忍阴极和阳极的混淆。该策略还可扩展到其他电池系统，如Zn-I和Zn-MnO微型电池。这项工作不仅为微型电池提出了一种有效的构建方法，还丰富了微尺度储能设备的种类。
