Facile and controllable construction of vanadium pentoxide@conducting polymer core/shell nanostructures and their thickness-dependent synergistic energy storage properties

Interface Engineering V2 O5 Nanofibers for High-Energy and Durable Supercapacitors

A local electric field is induced to engineer the interface of vanadium pentoxide nanofibers (V₂ O₅ -NF) to manipulate the charge transport behavior and obtain high-energy and durable supercapacitors. The interface of V₂ O₅ -NF is modified with oxygen vacancies (Vö) in a one-step polymerization process of polyaniline (PANI). In the charge storage process, the local electric field deriving from the lopsided charge distribution around Vö will provide Coulombic forces to promote the charge transport in the resultant Vö-V₂ O₅ /PANI nanocable electrode. Furthermore, an ≈7 nm porous PANI coating serves as the external percolated charge transport pathway. As the charge transfer kinetics are synergistically enhanced by the dual modifications, Vö-V₂ O₅ /PANI-based supercapacitors exhibit an excellent specific capacitance (523 F g^-1 ) as well as a long cycling lifespan (110% of capacitance remained after 20 000 cycles). This work paves an effective way to promote the charge transfer kinetics of electrode materials for next-generation energy storage systems.

Facile synthesis of porous carbon materials with extra high nitrogen content for supercapacitor electrodes

Three-dimensional porous nitrogen-doped carbon materials with extra high nitrogen content produced by directly carbonizing nitrogen-enriched precursors for supercapacitors.

Self-supported one-dimensional materials for enhanced electrochromism

A reversible, persistent electrochromic change in color or optical parameter controlled by a temporarily applied electrical voltage is attractive because of its enormous display and energy-related applications. Due to the electrochemical and structural advantages, electrodes based on self-supported one-dimensional (1D) nanostructured materials have become increasingly important, and their impacts are particularly significant when considering the ease of assembly of electrochromic devices. This review describes recent advances in the development of self-supported 1D nanostructured materials as electrodes for enhanced electrochromism. Current strategies for the design and morphology control of self-supported electrodes fabricated using templates, anodization, vapor deposition, and solution techniques are outlined along with demonstrating the influences of nanostructures and components on the electrochemical redox kinetics and electrochromic performance. The applications of self-supported 1D nanomaterials in the emerging bifunctional devices are further illustrated.

Hydrothermal synthesis of polyaniline intercalated vanadium oxide xerogel hybrid nanocomposites: effective control of morphology and structural characterization

Structural characterization of polyaniline intercalated layered vanadium-oxide xerogel nanocomposites with different morphologies revealed from XRD patterns and FESEM/HRTEM image analyses.