Reliable and flexible supercapacitors toward wide-temperature operation based on self-supporting SiC/CNT composite films

Abstract

To date, many efforts have been put for exploring flexible supercapacitors (SCs) to meet the balance between electrochemical and mechanical performances, which is currently still a grand challenge. In this...

Synthesis of 3C/2H/6H heterojunction SiC nanowires with high-performance supercapacitors by thermal evaporation

“…10f shows the comparison of energy and power density between our cell and other SiC and/or MoS 2 -based asymmetric supercapacitors reported in the literature. Clearly, compared with the values of mesoporous carbons//mesoporous carbons, 97 graphene aerogel//graphene aerogel, 98 graphene//graphene, 99 SiC/CNTs//SiC/CNTs, 19 3C-SiC/graphene//3C-SiC/graphene, 18 1T/2H MoS 2 //1T/2H MoS 2 , 10 and Ti/TiO 2 /MoS 2 //Ti/TiO 2 /MoS 2 , 3 SC-1400//SC-1400 exhibits a higher energy density at the same power density, suggesting its excellent storage ability.…”

“…11 However, they usually have low capacitance (10 ∼ 140 F g −1 , 7,16 90 ∼ 300 µF cm −2 16,17 ) and energy density (0.11 ∼ 1.81 W h kg −1 ). 18,19 The electrochemical performance of electrodes can be improved by strategies, such as heteroatom doping, nanostructure design, interfacial modification and defect construction. 20,21 For example, Zhao et al 8 prepared SiC nanofiber membranes with a porous structure, which had a high specific capacitance of 189 F g −1 and maintained a good cycling stability of 91.7% after 3000 cycles.…”