Recent advances in carbon-based supercapacitors

Abstract

<p>The rapid advancement of modern electronics starves for further breakthroughs to achieve high-energy, large-power and long-running energy-storage devices. Carbon-based supercapacitors (CSs) are promising large-power systems that store electrical energy at...</p>

Enhanced electrochemical activities of morphologically tuned MnFe2O4 nanoneedles and nanoparticles integrated on reduced graphene oxide for highly efficient supercapacitor electrodes

“…Generally, carbon based materials such as graphene, carbon black, graphene oxide and reduced graphene oxide, etc, exhibit EDLC-type behaviour. In the case of pseudocapacitors, very high energy density is obtained where the charge storage mechanism is probed by fast faradaic redox reactions 5,6 . Different types of metal oxides including spinel 7,8 , transition metal oxides 9,10 and conducting polymers 11,12 have been reported as pseudocapacitive materials.…”

Carbon coated cobalt oxide (CC-CO3O4) as electrode material for supercapacitor applications

“…24 The metal oxide/carbon composites have been fabricated including carbon nanotubes, carbon nanofibers, graphene, and amorphous carbon materials, which dramatically improved the electroconductivity and further enhanced the specific capacitance and rate performances of the metal oxide/carbon composites. [25][26][27][28][29][30] In this work, cobalt oxide slurry was prepared using cobalt oxide and sucrose, sucrose was used as a soluble carbon source in the slurry. Sucrose has converted into conducting carbon during annealing and coated on cobalt oxide particles.…”

In Situ Formation of “Dimethyl Sulfoxide/Water‐in‐Salt”‐Based Chitosan Hydrogel Electrolyte for Advanced All‐Solid‐State Supercapacitors

“…In this study, we designed a novel gel electrolyte, namely “DMSO/water in salt”‐based chitosan hydrogel electrolyte (DWIS‐CH), using chitosan as the support, H 2 O and DMSO as the solvents, and high concentrations of LiTFSI as the salt [19] . Water molecules can either bind to hydrophilic groups (hydroxy and amino groups) in the hydrogel or interact with Li + to construct a unique 3D ion channel [20] . Compatible with this hydrogel electrolyte, we also prepared an ideal nitrogen‐doped graphene (NG) hydrogel electrode with a large specific surface area through a hydrothermal method.…”

“…[19] Water molecules can either bind to hydrophilic groups (hydroxy and amino groups) in the hydrogel or interact with Li + to construct a unique 3D ion channel. [20] Compatible with this hydrogel electrolyte, we also prepared an ideal nitrogen-doped graphene (NG) hydrogel electrode with a large specific surface area through a hydrothermal method. Impressively, the desired allsolid-state hydrogel supercapacitor can be fabricated by means of in situ cross-linking due to the supramolecular complexation between chitosan and Li + -solvated complexes with an appropriate concentration (from 4 to 7 mol L À 1 ).…”