Microfluidic‐Spinning‐Chemistry Strategy toward in‐situ Generation of High‐Performance Nickel Molybdate/Porous Graphene Carbonene Fiber‐based Supercapacitors

Abstract

Abstract Graphene carbonene fiber (GCF) supercapacitors are promising for portable/wearable electronics but suffer from fabrication‐induced restacking and uneven hybridization between graphene sheets and hybrid active materials, degrading electrochemical performance and hindering practical applications. Here, an innovative microfluidic‐spinning‐chemistry (MSC) method is proposed for the in situ construction of the nickel molybdate/porous GCF (NiMoO 4 /PGCF) hybrid, which manifests a large specific surface area, high electrical conductivity, and abundant redox activity, facilitating ion diffusion, and ensuring energy storage and supply. As a result, the NiMoO 4 /PGCFs express an exceptional areal capacitance of 3597.7 mF cm −2 in a three‐electrode system. Additionally, this flexible solid‐state NiMoO 4 /PGCF supercapacitor presents large areal capacitance (1006.8 mF cm −2 ), ultrahigh energy density (218.5 µWh cm −2 ), and long‐term cycling stability (90.2% capacitive retention at 1 mA cm −2 after 20 000 cycles), which is capable of powering a toy windmill without extra recharging by other power sources. Furthermore, a demonstration of a supercapacitive controller using the solid‐state NiMoO 4 /PGCF is presented, which could couple with a triode to manage the takeoff of gliding unmanned aircraft. This provides high‐efficiency start/stop control and safety redundancy for gliding unmanned aircraft, while also paving the way for the innovation of next‐generation gliding unmanned aircraft energy management and control systems.