Construction of core-shell heterostructure containing sandwich-like nanoarray for high-performance supercapacitors

Rapid and Facile Method for the Synthesis of a Nanoarray Hierarchical Composite and Its Application in Flexible Self-Chargeable Supercapacitors

“…As illustrated in Figure a, both cathodic and anodic peaks show a good linear relationship and the calculated b -values are 0.57 and 0.74, respectively. This reflects both diffusion-controlled and capacitive-dominated behaviors, and capacitive-dominated behavior may play a dominant role in the whole energy storage process . In addition, the quantification of the capacitive-dominated and diffusion-controlled contributions to the total capacitances is studied using eq i ( V ) = k 1 v + k 2 v 0.5 k 1 v and k 2 v 0.5 are the current contributions from the capacitive-dominated and diffusion-controlled processes at a certain potential, respectively .…”

“…The GNS was prepared following the typical synthesis method reported previously. ,, Initially, 0.2 g of GO (see the Supporting Information for details of GO synthesis) was thoroughly decentralized in DI water with vigorous stirring, followed by 15 min of sonication to create a GO suspension. Subsequently, 0.06 mol of N 2 H 4 H 2 O was added drop by drop into the GO suspension under magnetic stirring continuously at 60 °C for 30 min, followed by heating to 80 °C for an additional 5 min.…”

“…This reflects both diffusion-controlled and capacitive-dominated behaviors, and capacitive-dominated behavior may play a dominant role in the whole energy storage process. 25 In addition, the quantification of the capacitivedominated and diffusion-controlled contributions to the total capacitances is studied using eq 5 52…”

“…24 Additionally, many 1D GNSs intertwine to form a 3D conductive network, providing an ideal continuous conductive pathway for ion diffusion and electron transfer. 25 Therefore, GNS is regarded as a promising candidate for an electrode material. However, the GNS-based SCs are still limited by the inherent unsatisfactory EDLC capacitances (100−200 F•g −1 ).…”

“…The spiral rolling structure not only can adapt to the volume changes caused by electrochemical reactions without damaging the tube walls but also prevent the restacking of graphene nanosheets . Additionally, many 1D GNSs intertwine to form a 3D conductive network, providing an ideal continuous conductive pathway for ion diffusion and electron transfer . Therefore, GNS is regarded as a promising candidate for an electrode material.…”