High conductivity Ni12P5 nanowires as high-rate electrode material for battery-supercapacitor hybrid devices

Supercapacitors based on Ti3C2Tx MXene extracted from supernatant and current collectors passivated by CVD-graphene

“…MXene have been studied intensively as emerging inorganic materials with layered structures that have numerous applications, such as energy storage, fuel cells, 3D printing, conductive ink, EMI shielding, and supercapacitor [1][2][3][4][5][6][7][8][9][10][11] . MXene is a class of 2D compounds, which is obtained from transition metal compounds, known as MAX phases that have the general formula M n+1 AX n , where M is generally an early transition metal (Ti, V, Nb, etc.…”

High-performance Bi2O3-NC anodes through constructing carbon shells and oxygen vacancies for flexible battery-supercapacitor hybrid devices

“…1 Battery-type electrode materials rely on strong Faraday reactions to store charges, 2 while capacitive electrode materials are based on three charge storage mechanisms: surface-controlled electric double layer capacitance (EDLC), surface-controlled redox pseudocapacitance and diffusion-controlled intercalation pseudocapacitance. 3 Battery-supercapacitor hybrid (BSH) devices as a type of asymmetric supercapacitors, are typically composed of a high-capacity battery-type electrode such as LiMn 2 O 4 , 4 Bi 2 O 3 , [5][6][7][8] Fe 3 O 4 , 9 Ni 12 P 5 , 10 Ni-Co, 11 Fe 3 C, 12 BiFeO 3 , 13 Bi 2 MoO 6 , 14 and a high-rate capacitive electrode such as carbon nanomaterials, [15][16][17] conducting polymers, 17,18 Nb 2 O 5 , 19 MoS 2 , 20 MXenes, 21 LaMnO 3 . 22 BSH devices emerge as the promising highly-efficient energy storage devices with both high energy density and power density, but usually suffer from the serious mismatch of electrochemical kinetics for cathodes and anodes, mainly due to complex Faradic reactions of the unmatched battery-type electrodes for charge storage, which inevitably degrade rate capability and power density.…”

Hollow Mesoporous Carbon Spheres for High Performance Symmetrical and Aqueous Zinc-Ion Hybrid Supercapacitor

“…A hybrid battery-supercapacitor device, which is typically constructed with a high capacity battery-type electrode and a high rate capacitor-type electrode, has proven to be an effective way of simultaneously combining the merits of batteries and supercapacitors (Gan et al, 2019;Wang et al, 2019;Tan et al, 2020). Currently, existing electrolytes include organic, ionic liquid, and aqueous solutions, among which the later has advantages of high ionic conductivity, low cost, inflammability, and it is environmentally benign (Chen et al, 2014;Wan et al, 2018).…”