3D-printed functional electrodes towards Zn-Air batteries
3D-printed functional electrodes towards Zn-Air batteries
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DOI：
10.1016/j.mtener.2020.100407
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发表时间：
2020-06
影响因子：
9.3
通讯作者：
Jian Zhang;Xue Liang Li;Shuang Fan;Shaozhuan Huang;D. Yan;Lei Liu;P. Alvarado;H. Yang
中科院分区：
文献类型：
--
作者：
Jian Zhang;Xue Liang Li;Shuang Fan;Shaozhuan Huang;D. Yan;Lei Liu;P. Alvarado;H. Yang
电极的制造和组装对于电池的制造至关重要，它是将电极材料转移到器件的桥梁。在这里，我们展示了一种用于构建锌空气电池功能电极（包括阳极和阴极）的3D打印技术。印刷阳极由许多锌微球组成，可以实现锌的高利用率。印刷自立式空气阴极具有高比表面积的分级多孔结构，赋予电极高电催化活性和反应快速扩散通道。得益于这些优点，组装后的锌空气电池在5 mA cm−2的电流密度下实现了670 mA h g−1的高放电容量，以及至少350次循环的长期循环稳定性，优于传统电池。这些特性背后的原因及其各自的特征都得到了很好的探讨和阐明。这项工作成功验证了打印电池电极的可行性，这可能会彻底改变电池制造。
Fabrication and assembly of electrodes are of great importance for the manufacturing of batteries, which are the bridge to transfer electrode materials to devices. Here, we demonstrate a 3D-printing technology for the construction of functional electrodes (including anode and cathode) for zinc-air batteries. The printed anode consists of many zinc micro-spheres that allows the high utilization of the zinc. The printed self-standing air cathode features hierarchical porous structure with high surface area, which endows the electrode with high electrocatalytic activity and fast diffusion channel for the reaction. Benefiting from these advantages, the as-assembled zinc-air batteries achieve a high discharge capacity of 670 mA h g−1at the current density of 5 mA cm−2, and long-term cycle stability at least 350 cycles, which are superior to those of conventional batteries. The reasons behind these properties and their respective characteristics are well explored and clarified. This work successfully validates the feasibility of printing battery electrodes, which might revolutionize battery manufacturing.