High‐Performance Pseudocapacitive Microsupercapacitors from Laser‐Induced Graphene

Abstract

All-solid-state, flexible, symmetric, and asymmetric microsupercapacitors are fabricated by a simple method in a scalable fashion from laser-induced graphene on commercial polyimide films, followed by electrodeposition of pseudocapacitive materials on the interdigitated in-plane architectures. These microsupercapacitors demonstrate comparable energy density to commercial lithium thin-film batteries, yet exhibit more than two orders of magnitude higher power density with good mechanical flexibility.

All-solid-state high-energy planar hybrid micro-supercapacitors based on 2D VN nanosheets and Co(OH)2 nanoflowers

“…4e), which was comparable to our aqueous device (76% after 10000 cycles, Fig. S10c) and state-of-the-art reported PHMSs and other asymmetric MSs, e.g., CNT//MnO 2 /CNT (74.7% after 10000 cycles), 32 graphene-FeOOH//graphene-MnO 2 (84% after 2000 cycles), 12 graphene quantum dots//MnO 2 (80% after 3000 cycles), 46 graphene quantum dots//polyaniline (85% after 1500 cycles), 45 and most reported sandwich ASCs, such as VN//Co(OH) 2 (86% after 4000 cycles), 15 Co(OH) 2 /graphene foam//graphene/ Fe 3 O 4 @carbon (72% after 8000 cycles), 47 and VN/NiOx (85% after 1000 cycles). 48 In addition, our mask-assisted manufacturing strategy is highly flexible for fabricating miniaturized VN//Co (OH) 2 -PHMSs with tailored device size and geometries (Fig.…”

“…So far, several strategies to manufacture the planar microelectrodes for MSs based on two different electrodes have been developed by micro-electro-mechanical systems (MEMS) fabrication, 27 inkjet printing, [28][29][30] electrochemical deposition 28,31,32 and combined with laser-irradiation assisted method. 12,33 The MEMS microfabrication, combining photolithography and a wet or dry etching process, is a well-established technique for processing high-resolution micropatterns. 27,34 However, this technique usually involves multiple separated steps, such as spin-coating of photoresist, masked irradiation, development, plasma etching, or magnetron sputtering, 27,35 resulting in low efficiency of device assembly in a large scale.…”

Flexible, Stretchable, and Transparent Planar Microsupercapacitors Based on 3D Porous Laser‐Induced Graphene

“…Recently, an inexpensive laser-inducing technique at room temperature has been applied to prepare graphene on polyimide (PI) substrate, and the resulting laser-induced graphene (LIG) has been demonstrated to be a ready electrode material for supercapacitors due to its 3D porous multilayer structure. [30][31][32] This work introduces 3D LIG directly from polyimide to prepare all-solid-state, highly stretchable, and transparent MSCs, using as the active material on silicone rubber substrates. The 3D network of LIG with interdigital microelectrode structure is obtained by using laser-inducing method on PI substrate.…”

A Highly Durable, Transferable, and Substrate‐Versatile High‐Performance All‐Polymer Micro‐Supercapacitor with Plug‐and‐Play Function

“…[1] On the other hand, the microfabrication technology opens up the possibilities for fabrication of microenergy-storage-devices with planar interdigitated structure. [20][21][22][23][24][25] Conductive polymers after being doped, advantageous to other pseudocapacitive materials (metal oxides), [26,27] offer low cost, high conductivity, lightweight, and excellent flexibility. Although these μSCs show excellent energy-storage performance (e.g., excellent power density and long cycle life) and great feasibility to be integrated to miniaturized devices, the usage scenarios are still limited due to the following disadvantages.…”