Journal ArticleDOI
Vertically Oriented Graphene Bridging Active‐Layer/Current‐Collector Interface for Ultrahigh Rate Supercapacitors
Zheng Bo,Weiguang Zhu,Wei Ma,Zhenhai Wen,Zhenhai Wen,Xiaorui Shuai,Junhong Chen,Jianhua Yan,Zhihua Wang,Kefa Cen,Xinliang Feng +10 more
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TLDR
Graphene nanosheets standing vertically on a current collector can work as numerous electrically conductive bridges to facilitate charge transport and mitigate the constriction/spreading resistance at the interface between the active material and the current collector.Abstract:
Dense networks of graphene nanosheets standing vertically on a current collector can work as numerous electrically conductive bridges to facilitate charge transport and mitigate the constriction/spreading resistance at the interface between the active material and the current collector. The vertically oriented graphene-bridged supercapacitors present excellent rate and power capabilities.read more
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Latest advances in supercapacitors: from new electrode materials to novel device designs.
Faxing Wang,Faxing Wang,Faxing Wang,Xiongwei Wu,Xiongwei Wu,Xinhai Yuan,Zaichun Liu,Yi Zhang,Lijun Fu,Yusong Zhu,Qingming Zhou,Yuping Wu,Yuping Wu,Wei Huang +13 more
TL;DR: The state-of-the-art progress toward mechanisms, new materials, and novel device designs for supercapacitors is summarized and key technical challenges are highlighted regarding further research in this thriving field.
Journal ArticleDOI
Flexible Energy-Storage Devices: Design Consideration and Recent Progress
TL;DR: This review describes the most recent advances in flexible energy-storage devices, including flexible lithium-ion batteries and flexible supercapacitors, based on carbon materials and a number of composites and flexible micro-supercapacitor.
Journal ArticleDOI
Thickness-independent capacitance of vertically aligned liquid-crystalline MXenes.
Yu Xia,Tyler S. Mathis,Meng-Qiang Zhao,Meng-Qiang Zhao,Babak Anasori,Alei Dang,Alei Dang,Zehang Zhou,Zehang Zhou,Hyesung Cho,Yury Gogotsi,Shu Yang +11 more
TL;DR: Electrode films prepared from a liquid-crystal phase of vertically aligned two-dimensional titanium carbide show electrochemical energy storage that is nearly independent of film thickness, which makes them highly attractive for energy storage applications.
Journal ArticleDOI
NiCo2S4 Nanosheets Grown on Nitrogen‐Doped Carbon Foams as an Advanced Electrode for Supercapacitors
TL;DR: In this article, the rational design and fabrication of NiCo2S4 nanosheets supported on nitrogen-doped carbon foams (NCF) is presented as a novel flexible electrode for supercapacitors.
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
Processable aqueous dispersions of graphene nanosheets
TL;DR: It is reported that chemically converted graphene sheets obtained from graphite can readily form stable aqueous colloids through electrostatic stabilization, making it possible to process graphene materials using low-cost solution processing techniques, opening up enormous opportunities to use this unique carbon nanostructure for many technological applications.
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Graphene-Based Ultracapacitors
TL;DR: CMG materials are made from 1-atom thick sheets of carbon, functionalized as needed, and here their performance in an ultracapacitor cell is demonstrated, illustrating the exciting potential for high performance, electrical energy storage devices based on this new class of carbon material.
Journal ArticleDOI
Carbon-based Supercapacitors Produced by Activation of Graphene
Yanwu Zhu,Shanthi Murali,Meryl D. Stoller,K. J. Ganesh,Weiwei Cai,Paulo J. Ferreira,Adam Pirkle,Robert M. Wallace,Katie A. Cychosz,Matthias Thommes,Dong Su,Eric A. Stach,Rodney S. Ruoff +12 more
TL;DR: This work synthesized a porous carbon with a Brunauer-Emmett-Teller surface area, a high electrical conductivity, and a low oxygen and hydrogen content that has high values of gravimetric capacitance and energy density with organic and ionic liquid electrolytes.
Journal ArticleDOI
Giant intrinsic carrier mobilities in graphene and its bilayer
Sergey V. Morozov,K. S. Novoselov,Mikhail I. Katsnelson,Fred Schedin,D. C. Elias,John A. Jaszczak,A. K. Geim +6 more
TL;DR: Measurements show that mobilities higher than 200 000 cm2/V s are achievable, if extrinsic disorder is eliminated and a sharp (thresholdlike) increase in resistivity observed above approximately 200 K is unexpected but can qualitatively be understood within a model of a rippled graphene sheet in which scattering occurs on intraripple flexural phonons.
Journal ArticleDOI
Approaching ballistic transport in suspended graphene.
TL;DR: This work shows that the fluctuations are significantly reduced in suspended graphene samples and reports low-temperature mobility approaching 200,000 cm2 V-1 s-1 for carrier densities below 5 x 109 cm-2, which cannot be attained in semiconductors or non-suspended graphene.