A novel three-dimensional (3D) metal/metal oxide core/branch array electrode has been fabricated as a supercapacitor electrode. Hollow Ni nanocorn arrays are constructed on Ni foams and act as a highly conductive and stable support to Co3O4 nanoflakes. Enhanced pseudocapacitive performance compared to bare Co3O4 nanosheets is demonstrated with high rate capability and excellent cycling stability.

Typically, conducting polymers store and release charges by means of redox processes. Unlike carbons who store charges on the surface, conducting polymers store them within the bulk volume, which explain its high specific capacitance, Cs value. In addition, it also offers high specific power due to its rapid charge/discharging rate. Therefore, conducting polymers play a significant role in supe...

A novel C-Ni-SiC composite using sawtooth-like SiC as support and carbon as modified material was prepared by hydrothermal synthesis and thermochemical pyrolysis. As a supercapacitor electrode, it exhibits very high specific capacitance (1780 F g(-1)) and excellent cycling performance (>96% for 2500 cycles).

A unique carbon with a high specific surface area was prepared by carbonization of a polymer-based precursor, agar, in the presence of graphene. Graphene prevents the shrinkage and aggregation of the carbonized particles, resulting in extraordinarily large external surface area (∼1200 m(2) g(-1)) of the carbon, which shows a high rate performance as a supercapacitor electrode.

Layered titanate H2Ti3O7 nanotubes were synthesized and firstly used as a supercapacitor electrode in a non-aqueous electrolyte. They exhibited the specific capacitances as high as 414 and 306 F g(-1) at 0.5 and 10 A g(-1), respectively, and 82% of the specific capacitance at the 10th cycle can be retained after 1000 cycles.

This paper proposes an integrated multiport non-isolated DC–DC converter system for integrating battery–supercapacitor hybrid energy storage with photovoltaics solar-powered unmanned aerial vehicles applications. Compared to the traditional topologies used, proposed allows a size reduction of at least 20% supercapacitor by maximizing utilization rated capacity. In addition, proposing use phase-...