Freestanding 3D Metallic Micromesh for High‐Performance Flexible Transparent Solid‐State Zinc Batteries. Issue 24 (13th May 2022)

• Record Type: Journal Article
• Authors: Chen, Tianwei; Shuang, Zhengwen; Hu, Jin; Zhao, YanLi; Wei, Donghai; Ye, Jinghua; Zhang, Guanhua; Duan, Huigao
• Is Part Of: Small. Volume 18:Issue 24(2022)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-05-13
• Subjects: alkaline zinc batteries -- flexible electronics -- metallic micromeshes -- flexible transparent batteries; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202201628
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: Flexible transparent energy supplies are extremely essential to the fast‐growing flexible electronic systems. However, the general developed flexible transparent energy storage devices are severely limited by the challenges of low energy density, safety issues, and/or poor compatibility. In this work, a freestanding 3D hierarchical metallic micromesh with remarkble optoelectronic properties (T = 89.59% and Rs = 0.23 Ω sq −1 ) and super‐flexibility is designed and manufactured for flexible transparent alkaline zinc batteries. The 3D Ni micromesh supported Cu(OH)2 @NiCo bimetallic hydroxide flexible transparent electrode (3D NM@Cu(OH)2 @NiCo BH) is obtained by a combination of photolithography, chemical etching, and electrodeposition. The negative electrode is constructed by electrodeposition of electrochemically active zinc on the surface of Ni@Cu micromesh (Ni@Cu@Zn MM). The metallic micromesh with 3D hierarchical nanoarchitecture can not only ensure low sheet resistance, but also realize high mass loading of active materials and short electron/ion transmission path, which can guarantee high energy density and high‐rate capability of the transparent devices. The flexible transparent 3D NM@Cu(OH)2 @NiCo BH electrode realizes a specific capacity of 66.03 μAh cm −2 at 1 mA cm −2 with a transmittance of 63%. Furthermore, the assembled solid‐state NiCo‐Zn alkaline battery exhibits a desirable energy density/power density of 35.89 μWh cm −2 /2000.26 μW cm −2 with a transmittance of 54.34%. Abstract : A freestanding 3D hierarchical metallic micromesh with outstanding optoelectronic properties and super‐flexibility is designed and fabricated for flexible transparent alkaline zinc batteries. The assembled solid‐state NiCo‐Zn battery exhibits a desirable energy density/power density of 0.35 Wh m −2 /20.00 W m −2 with a transmittance of 54.34%. It is expected that the flexible transparent batteries will open up new opportunities for future flexible electronics.