Additive‐Free Ultrastable Hydrated Vanadium Oxide Sol/Carbon Nanotube Ink for Durable and High‐Power Aqueous Zinc‐Ion Battery

• DOI: 10.1002/admi.202200174
• Publication Date: 2022-04-08T05:20:37Z
• Authors: Hongrun Jin; Fen Li; Jiasong Gao; Kaisi Liu; Yongxin Luo; He Zhou; Bin Yao; Jiangjiang Duan; Bin Hu; Liang Huang; Jun Zhou
• Keywords: Vanadium Oxide

Abstract Aqueous zinc‐ion batteries (ZIBs) based on near‐neutral electrolytes represent a promising large‐scale energy storage solution for deeper and broader penetration of clean renewable energy. The preparation electrode paste is vital the normal performance stability ZIBs. Herein, authors report an additive‐free V 2 O 5 ·1.6H ( h ‐V )/carbon nanotube (CNT) hybrid ink to prepare free‐standing /CNT film high‐rate durable as‐prepared exhibits high specific capacity 446.4 mA g −1 (volumetric 839.2 cm −3 ) at 0.2 A when used as cathode It retains considerable capacities 202.3 139.0 even current densities 20 50 g− 1 , respectively, exhibiting ultrahigh rate capability. assembled cell also displays outstanding long‐term cycling with remarkable 309.7 after 3500 cycles 10 . More importantly, this sol can serve general “surfactant” disperse variety nanomaterials in water. This work proposes facile strategy conductive electrode, which holds great potential broad range applications.