Journal ArticleDOI
Carbon Materials for Chemical Capacitive Energy Storage
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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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Journal ArticleDOI
High‐Performance Two‐Ply Yarn Supercapacitors Based on Carbon Nanotubes and Polyaniline Nanowire Arrays
TL;DR: Fine count two-ply yarn supercapacitors are constructed from carbon nanotube yarns and polyaniline nanowires and possess excellent electrochemical capacity and are very strong and flexible.
Journal ArticleDOI
Low-crystalline iron oxide hydroxide nanoparticle anode for high-performance supercapacitors.
Kwadwo Asare Owusu,Longbing Qu,Longbing Qu,Jiantao Li,Zhaoyang Wang,Kangning Zhao,Chao Yang,Kalele Mulonda Hercule,Chao Lin,Changwei Shi,Qiulong Wei,Liang Zhou,Liqiang Mai +12 more
TL;DR: An aqueous hybrid supercapacitor based on the iron oxide hydroxide anode shows stability during float voltage test for 450 h and an energy density of 104 Wh kg−1 at a power density of 1.27 kW kg−1.
Journal ArticleDOI
Two-dimensional mesoporous carbon nanosheets and their derived graphene nanosheets: synthesis and efficient lithium ion storage.
Yin Fang,Yingying Lv,Renchao C Che,Haoyu Wu,Xuehua Zhang,Dong Gu,Gengfeng Zheng,Dongyuan Zhao +7 more
TL;DR: Lithium ion battery anodes made of the mesoporous graphene nanosheets have exhibited an excellent reversible capacity, and they can retain at 833 mAh/g even after numerous cycles at varied current densities, suggesting a remarkably promising candidate for energy storage.
Journal ArticleDOI
Electrolyte selection for supercapacitive devices: a critical review
TL;DR: In this article, the current state of understanding of the electrode-electrolyte interaction in supercapacitors and battery-supercapacitor hybrid devices is reviewed, and factors that affect the overall performance of the devices such as the ionic conductivity, mobility, diffusion coefficient, radius of bare and hydrated spheres, ion solvation, viscosity, dielectric constant, electrochemical stability, thermal stability and dispersion interaction.
Journal ArticleDOI
Hydrophilic Hierarchical Nitrogen‐Doped Carbon Nanocages for Ultrahigh Supercapacitive Performance
Jin Zhao,Hongwei Lai,Zhiyang Lyu,Yufei Jiang,Ke Xie,Xizhang Wang,Qiang Wu,Lijun Yang,Zhong Jin,Yanwen Ma,Jie Liu,Zheng Hu +11 more
TL;DR: The synergism of large surface area, multiscale porous structure, and good conductivity endows hierarchical carbon nanocages with high-level supercapacitive performances as mentioned in this paper.
References
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Journal ArticleDOI
Materials for electrochemical capacitors
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