Metal–organic framework-derived high conductivity Fe3C with porous carbon on graphene as advanced anode materials for aqueous battery-supercapacitor hybrid devices

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

“…(F) The calculated specific capacities at different current densities. (G) Ragone plots of the electrochemical energy-storage devices and compared to previously reported results (Chen et al, 2014;Wang et al, 2018;Tan et al, 2020). (H) The cyclic stability and columbic efficiency of the devices.…”

“…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).…”

Recent advances in carbon-based supercapacitors

“…Battery-capacitor hybrid devices combine capacitive carbon and battery-type electrodes, exhibiting energy storage close to those of batteries and power output approximately that of supercapacitors. 7,[151][152][153][154] Nevertheless, battery-type materials generally exhibit limited kinetics during redox reactions rooted from the sluggish phase transformation rate. 8 Wang's group synthesized and employed hierarchical porous carbon nanosheets and MnO@C nanocomposites as the positive and negative electrodes for Li-ion hybrid capacitors with kapok fiber as the precursor.…”

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.…”