Electrochemically building three-dimensional supramolecular polymer hydrogel for flexible solid-state micro-supercapacitors

Polyaniline/Poly(acrylamide‐co‐sodium acrylate) Porous Conductive Hydrogels with High Stretchability by Freeze‐Thaw‐Shrink Treatment for Flexible Electrodes

“…The phytic acid molecule has six phosphate groups, which can interact with nitrogen groups on a plurality of polyaniline molecular chains to crosslink polyaniline. [ 29,30 ] Due to the addition of phytic acid, the pH of the system becomes lower, and the volume of the hydrogel continues to shrink as the aniline reacts. The in‐situ polymerization of aniline on the ASH hydrogel backbone to form a polyaniline conductive network.…”

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.…”

NiMnCr layered double hydroxide-carbon spheres modified Ni foam: An efficient positive electrode for hybrid supercapacitors

“…Among all the above mentioned applications, the development of high performance supercapacitors represents a very active area of research. In fact, as the energy crisis and environmental pollution caused by fossil fuels are becoming a very serious issue worldwide, supercapacitors have aroused widespread attention as energy storage devices [10][11][12]. It is universally acknowledged that supercapacitors possess unique advantages like superior reversibility, long cycle life, and high power density [13][14][15][16][17].…”