In situ formation of Co3O4 nanocrystals embedded in laser-induced graphene foam for high-energy flexible micro-supercapacitors. Issue 7 (31st January 2022)

• Record Type: Journal Article
• Authors: Ding, Xiaohong; Liu, Ruilai; Zhao, Jingyun; Hu, Jiapeng; Wu, Jinjin; Zhang, Cheng; Lin, Jing
• Is Part Of: Dalton transactions. Volume 51:Issue 7(2022)
• Page Start: 2846
• Page End: 2854
• Publication Date: 2022-01-31
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d1dt03848f
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : The cost-effective synthesis of flexible energy storage devices with high energy and power densities is a challenge in wearable electronics. Abstract : The cost-effective synthesis of flexible energy storage devices with high energy and power densities is a challenge in wearable electronics. Here, we report a facile, efficient, and scalable approach for preparing three-dimensional (3D) laser-induced graphene foam (Co3 O4 @LIG) embedded with porous Co3 O4 nanocrystals using a CO2 infrared laser. The in situ formed Co3 O4 @LIG nanocomposites directly serve as active materials, current collectors, and the conductive substrate for micro-supercapacitors (MSCs). Benefiting from rational structural features, the MSC based on Co3 O4 @LIG nanocomposites (Co3 O4 @LIG-MSC) with an interdigitated electrode configuration exhibits excellent electrochemical performance, including a high specific capacitance (143.5 F g −1 ), excellent rate capability, high energy density (19.9 W h kg −1 at a power density of 0.5 W kg −1 ), and remarkable power density (15.0 W kg −1 at an energy density of 15.8 W h kg −1 ). Furthermore, the device possesses good stability under different bending diameters and cycling stability. Such a highly integrated flexible MSC with high energy and power densities made by a directly laser scribing strategy has some potential for the fabrication of wearable energy storage devices.