Journal ArticleDOI
Carbon Materials for Chemical Capacitive Energy Storage
TLDR
In order to further improve the power and energy densities of the capacitors, carbon-based composites combining electrical double layer capacitors (EDLC)-capacitance and pseudo-Capacitance have been explored and show not only enhanced capacitance, but as well good cyclability.Abstract:
Carbon materials have attracted intense interests as electrode materials for electrochemical capacitors, because of their high surface area, electrical conductivity, chemical stability and low cost. Activated carbons produced by different activation processes from various precursors are the most widely used electrodes. Recently, with the rapid growth of nanotechnology, nanostructured electrode materials, such as carbon nanotubes and template-synthesized porous carbons have been developed. Their unique electrical properties and well controlled pore sizes and structures facilitate fast ion and electron transportation. In order to further improve the power and energy densities of the capacitors, carbon-based composites combining electrical double layer capacitors (EDLC)-capacitance and pseudo-capacitance have been explored. They show not only enhanced capacitance, but as well good cyclability. In this review, recent progresses on carbon-based electrode materials are summarized, including activated carbons, carbon nanotubes, and template-synthesized porous carbons, in particular mesoporous carbons. Their advantages and disadvantages as electrochemical capacitors are discussed. At the end of this review, the future trends of electrochemical capacitors with high energy and power are proposed.read more
Citations
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Asymmetric supercapacitor based on graphene oxide/polypyrrole composite and activated carbon electrodes
TL;DR: In this article, an asymmetric supercapacitor is fabricated by using the optimized GO/polypyrrole (GO/PPy) composite as positive electrode and activated carbon (AC) as negative electrode.
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A high-capacity carbon prepared from renewable chicken feather biopolymer for supercapacitors
TL;DR: In this paper, the structure and electrochemical properties of CFC materials are characterized with N 2 adsorption/desorption measurements, X-ray diffraction (XRD), transmission electron microscope (TEM), cyclic voltammetry (CV), galvanostatic charge/discharge cycling and electro chemical impedance spectroscopy (EIS).
Journal ArticleDOI
Hierarchically Porous Carbon Monoliths Comprising Ordered Mesoporous Nanorod Assemblies for High-Voltage Aqueous Supercapacitors
George Hasegawa,Kazuyoshi Kanamori,Tsutomu Kiyomura,Hiroki Kurata,Takeshi Abe,Kazuki Nakanishi +5 more
TL;DR: In this paper, a facile one-pot synthesis of hierarchically porous resorcinol-formaldehyde (RF) gels comprising mesoporous nanorod assemblies with two-dimensional (2D) hexagonal ordering was demonstrated.
Journal ArticleDOI
Stacked-Layer Heterostructure Films of 2D Thiophene Nanosheets and Graphene for High-Rate All-Solid-State Pseudocapacitors with Enhanced Volumetric Capacitance.
Zhong-Shuai Wu,Yijun Zheng,Shuanghao Zheng,Shuanghao Zheng,Sen Wang,Sen Wang,Chenglin Sun,Khaled Parvez,Taichi Ikeda,Xinhe Bao,Klaus Müllen,Xinliang Feng +11 more
TL;DR: Stacked-layer heterostructure films of 2D thiophene nanosheets and electrochemically exfoliated graphene are constructed for ultrahigh-rate all-solid-state flexible pseudocapacitors and micro-supercapacitors with superior volumetric capacitance.
Journal ArticleDOI
Egg-Box Structure in Cobalt Alginate: A New Approach to Multifunctional Hierarchical Mesoporous N-Doped Carbon Nanofibers for Efficient Catalysis and Energy Storage
TL;DR: A unique large-scale sustainable biomass conversion strategy for the synthesis of earth-abundant multifunctional carbon nanomaterials with well-defined doped heteroatom level and multimodal pores through pyrolyzing electrospinning renewable natural alginate is demonstrated.
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