Themed collection JMC A Top Picks web collection: Advances in supercapacitors

Flexible supercapacitors based on carbon nanomaterials are currently of intense interest for use in portable, light-weight, and wearable electronics.

Layered transition metal dichalcogenides (TMDs) (MoS₂, MoSe₂, WS₂, WSe₂, etc.) are a chemically diverse class of compounds having remarkable electrochemical properties.

Revolutionary development in the synthesis of graphene and its hybrids has made their use in various devices, like lithium based batteries, supercapacitors and fuel cells, possible.

The recent progress, challenges and promising future on design, synthesis and fabrication of MnO₂ for supercapacitors are reviewed and discussed.

Vertically oriented graphene nanosheets were synthesized by an alternative and simple approach based on electron cyclotron resonance-plasma enhanced chemical vapor deposition (ECR-CVD) onto highly doped silicon substrates.

A one-step scalable spray technique was used to fabricate solid-state supercapacitors with 3D nanostructured hybrid electrodes.

A spongy polypyrrole based conductive hydrogel with chemically tunable structures and electrochemical characteristics was developed for highly flexible solid-state supercapacitors.

A micro-supercapacitor electrode made of polypyrrole coated silicon nanotrees.

The synthesis of MnO₂ with unique and complex 3-d morphology replicated from diatoms and their outstanding electrochemical properties for high-performance supercapacitors are demonstrated.

Sulfanilic acid azocromotrop modified reduced graphene oxide was prepared by non-covalent functionalization of graphene oxide followed by post reduction using hydrazine monohydrate.

A “pseudocomposite” with unique nano-architecture of two Ni(OH)₂/RGO layer was in situ synthesized on nickel foam (NF) using a facile onepot hydrothermal approach, which exhibits superior capacitive performance (15.65 F cm⁻² at 7 mA cm⁻², 90.6% capacity retention after 5000 cycles at 20 mA cm⁻²).

A procedure for the fabrication of hollow carbon spheres with high nitrogen content and tunable porosity is presented. The carbon capsules exhibited high specific capacitances and a remarkable capacitance retention.

A facile protocol for the self-assembly of the rGO/β-MnO₂ hybrid hydrogel with ultrafine structure and precise control of mass-loading for high performance supercapacitors is reported.

Three-dimensional networked NiCo₂O₄/MnO₂ branched nanowire heterostructure arrays directly grown on Ni foam for high-performance electrode application in supercapacitors.

Hierarchical nanosheet-based NiMoO₄ nanotubes with a high surface area of 128.5 m² g⁻¹, composed of highly ordered ultrathin nanosheets with a thickness of less than 10 nm, were synthesized by a hydrothermal treatment and a subsequent in situ diffusion reaction method, exhibiting excellent electrochemical performances.

We design novel symmetric supercapacitors based on nanoporous carbons (NPCs) by direct carbonization of Zn-based metal–organic frameworks (MOFs).

Porous cobalt sulfide (Co₉S₈) nanostructures with tunable morphology directly nucleated over carbon fiber are evaluated as electrodes for asymmetric hybrid supercapacitors.

A complex hydroxide/metal Ni(OH)₂@Ni core–shell electrode was developed for a high-performance and flexible pseudocapacitor.

The porous nitrogen-doped hollow carbon spheres derived from polyaniline are promising electrode materials for high performance supercapacitors due to their hierarchical porous structure and nitrogen-doping.

Graphene-coated hollow mesoporous carbon spheres are rationally designed and originally used as efficient electrode materials for capacitive deionization.