Mesoporous polypyrrole-based graphene nanosheets anchoring redox polyoxometalate for all-solid-state micro-supercapacitors with enhanced volumetric capacitance

Abstract

Further, mPGM-MSCs disclosed robust mechanical flexibility with~96% of capacitance retention at a highly bending angle of 180°, and impressive parallel or serial interconnection for boosting capacitance or voltage output. As a consequence, our proposed strategy of filling the redox species into mesoporous graphene and other 2D nanosheets will open up new ways to manufacture high-compact and flexible energy storage devices ranging from supercapacitors to batteries.

Graphene‐Based Planar Microsupercapacitors: Recent Advances and Future Challenges

“…Additionally, poly pyrrole is also a part of graphene/conducting polymers (mPPy@RGO‐POM, mPGM). Template‐based mesoporous poly pyrrole‐graphene sheet MSC was reported by Qin et al, as presented in Figure c . The obtained mPGM‐MSC, containing a combination of mPPy@RGO‐POM and EG nanosheets, delivered a specific capacitance of 115 mF cm −2 , with excellent mechanical flexibility, and excellent integration capabilities.…”

“…c) Scheme of the fabrication of mPPy@RGO‐POM Nano sheets. Reproduced with permission . Copyright 2017, Science China Press and Springer‐Verlag.…”

Recent advances in flexible supercapacitors based on carbon nanotubes and graphene

“…In addition, traditional electrode fabrication processes involve a slurry-making process, during which insulative binders and conductive additives are used. The binders and conductive additives inhibits the electrochemical performance of batteries and supercapacitors because they contribute little to the overall performance, while constituting 20-30 wt.% of the slurry [15][16][17][18]. In addition, the liquid electrolyte of traditional energy storage devices will leak when the battery is deformed, which poses serious safety concerns.…”

The way to improve the energy density of supercapacitors: Progress and perspective

“…Achieving high-energy-density symmetric supercapacitors (EDLCs) presently remains a major challenge [70][71][72]. Future work should focus on the increasing capacitance and working voltage by increasing the specific capacitance by enhancing the effective specific surface area, optimizing the pore size and volume, and providing surface functional groups to increase the pseudocapacitance contribution.…”