Enhanced laser scribed flexible graphene-based micro-supercapacitor performance with reduction of carbon nanotubes diameter

Extraordinary Areal and Volumetric Performance of Flexible Solid‐State Micro‐Supercapacitors Based on Highly Conductive Freestanding Ti3C2Tx Films

“…Furthermore, the corresponding areal and volumetric capacitances reach up to 292 mF cm −2 and 732 F cm −3 when calculated based on only single electrode, which are on the very top level for all the MSCs. [9,22,32,33,[46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64] Meanwhile, the detailed information of the areal and volumetric capacitances for MSCs based on other different materials was listed in Table S5 (Supporting Information). [9,22,32,33,[46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61][62][63][64] Meanwhile, the detailed information of the areal and volumetric capacitances for MSCs based on other different materials was listed in …”

Facile fabrication of all-solid-state flexible interdigitated MnO2 supercapacitor via in-situ catalytic solution route

“…Since areal energy and power density are more significant to planar flexible energy harvesting devices, the effective working area of the flexible SCs was taken as 0.625 cm 2 , which was considered without the areas of gap between electrodes. For further evaluation of the PET/Pt/MnO 2 flexible SCs, an extensive comparison was conducted with both flexible SCs, for instance, Ag nanowire/PEDOT/PSS-nanopillar/ MnO 2 sandwich-type flexible SC [55], LSG-MSC all-solid-state flexible SC [56], and also with on-chip SCs, like MWCNT/MnO X allsolid-state on-chip SC [57], Graphene/MWNT all-solid-state onchip SC [58], MnO 2 -MnO 2 symmetric on-chip SC [59] and MnO 2 -AC asymmetric on-chip SC [59]. All the references taken as examples here are based on similar electrode material system and similar size in order for the comparability.…”

“…7e, our PET/Pt/MnO 2 flexible SCs exhibits excellent performances not only in the category of energy storing but also charge and discharge, compared with SC of traditional electrode structure like Ag nanowire/PEDOT/PSS-nanopillar/ MnO 2 sandwich-type flexible SC [55], this is because that interdigitated type is benefit for ion diffusion and electron transportation during the charge and discharge process compared to traditional sandwich type under the circumstances of the same electrode materials system of metal/MnO 2 [60]. When compared with some SCs which obtains the same interdigitated structure, for example the work of Wen et al [56] and Shen et al [59] shown in the Fig. 7e, the advantages of SCs of which the electrode materials have been furthermore optimized with other active materials decorated are very obvious, in both power and energy performance.…”

Recent progress in carbon-based nanoarchitectures for advanced supercapacitors

“…The excellent conductivity of graphene layers could omit the use of conductive additives, making graphene-based electrodes show improved energy density [107]. Owing to the strong cohesive van der Waals energy and intensive π-π interaction between the planar basal planes, however, graphene layers exhibit the strong tendency to restack together, which arises at stages in both electrode manufacture and cycling, and this may significantly decrease the ion-accessible surfaces and limit ion and electron transport due to narrower channels, strongly reducing the practical surface available for charge storage [106,111,112]. Therefore, to explore the approaches for the mitigation of these detrimental effects is essential.…”

“…As Liu et al [112] reported, the flexible graphene/CNT micro-supercapacitor (MSC) was fabricated by using the laser-scribing technology. The CNTs played roles of spacers in prevention of restacking of graphene layers and thus increased ion-accessible surface area.…”