Ultrafast All‐Solid‐State Coaxial Asymmetric Fiber Supercapacitors with a High Volumetric Energy Density

Pan, Zhenghui; Zhong, Jun; Zhang, Qichong; Yang, Jie; Qiu, Yongcai; Ding, Xiaoyu; Nie, Kaiqi; Yuan, Hua; Feng, Kun; Wang, Xianshu; Xu, Guoguang; Li, Wanfei; Yao, Yagang; Li, Qinwen; Liu, Meinan; Zhang, Yuegang

doi:10.1002/aenm.201702946

Cited by 92 publications

(76 citation statements)

References 68 publications

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“…density are the two crucial parameters for evaluating the practical applications of SCs. [8,14,21,23] As shown in Figure 7a, the observed variations in the GCD curves were negligible under various bending angles from 0° to 180° at a current density of 5 mA cm −2 , demonstrating the excellent flexibility of the as-fabricated FASC device. The as-assembled FASC device was able to store a maximum volumetric energy density of 36.0 mWh cm −3 with a volumetric power density of 266.7 mW cm −3 at a current density of 1 mA cm −2 .…”

Section: Resultsmentioning

confidence: 87%

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of energy storage devices with high energy density. [4,8,11,[18][19][20][21][22][23][24][25][26][27] However, their low energy density has severely restricted their practical application in high-energy-density wearable devices. [4,8,11,[18][19][20][21][22][23][24][25][26][27] However, their low energy density has severely restricted their practical application in high-energy-density wearable devices.

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confidence: 99%

“…[4,8,11,[18][19][20][21][22][23][24][25][26][27] However, their low energy density has severely restricted their practical application in high-energy-density wearable devices. [21,29,33,34] These restrictions mainly originate from the characteristics of the electrode materials. [21,29,33,34] These restrictions mainly originate from the characteristics of the electrode materials.…”

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confidence: 99%

“…[1,11,36,38,39] Therefore, in this work, cobalt-nickel-oxide (CoNiO 2 ) nanowire arrays (NWAs) were selected for their high electrical conductivity and a certain amount of capacity. [1,4,6,8,[20][21][22]34,40,41] Anode materials with high electrical conductivity and specific capacitance also play a crucial role in the fabrication of high-energy-density FASCs. Hence, a facile and cost-effective method was used to directly grow 3D well-aligned hierarchical CoNiO 2 NWAs@nickel hydroxide (Ni(OH) 2 ) NSs core-shell heterostructures on a carbon nanotube fiber (CNTF) as a novel binder-free positive electrode.…”

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confidence: 99%

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All Hierarchical Core–Shell Heterostructures as Novel Binder‐Free Electrode Materials for Ultrahigh‐Energy‐Density Wearable Asymmetric Supercapacitors

Zhang

Sun

et al. 2018

Advanced Science

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High‐performance fiber‐shaped energy‐storage devices are indispensable for the development of portable and wearable electronics. Composite pseudocapacitance materials with hierarchical core–shell heterostructures hold great potential for the fabrication of high‐performance asymmetric supercapacitors (ASCs). However, few reports concerning the assembly of fiber‐shaped ASCs (FASCs) using cathode/anode materials with all hierarchical core–shell heterostructures are available. Here, cobalt‐nickel‐oxide@nickel hydroxide nanowire arrays (NWAs) and titanium nitride@vanadium nitride NWAs are constructed skillfully with all hierarchical core–shell heterostructures directly grown on carbon nanotube fibers and are shown to exhibit ultrahigh capacity and specific capacitance, respectively. The specific features and outstanding electrochemical performances of the electrode materials are exploited to fabricate an FASC device with a maximum working voltage of 1.6 V, and this device exhibits a high specific capacitance of 109.4 F cm−3 (328.3 mF cm−2) and excellent energy density of 36.0 mWh cm−3 (108.1 µWh cm−2). This work therefore provides a strategy for constructing all hierarchical core–shell heterostructured cathode and anode materials with ultrahigh capacity for the fabrication of next‐generation wearable energy‐storage devices.

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Section: Resultsmentioning

confidence: 87%

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confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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All Hierarchical Core–Shell Heterostructures as Novel Binder‐Free Electrode Materials for Ultrahigh‐Energy‐Density Wearable Asymmetric Supercapacitors

Zhang

Sun

et al. 2018

Advanced Science

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“…However, the addition of a binder to a powdery active material in actual use results in a decrease in electrical conductivity and utilization efficiency, and difficulty in manufacturing a flexible electrode. A new method to overcome this problem is to directly graft the electroactive material onto the conductive and flexible substrate to build an integrated hybrid electrode material, which can make use of the synergistic effect of the rational hybridization of the active material with the substrate, and its overall electrochemical performance is superior to the individual components . In general, the conductive scaffold or robust skeletons can be mainly divided into two major categories, i. e., metallic conductive substrates (e. g., nickel foam, Ti plate) and carbon‐based substrates .…”

Section: Introductionmentioning

confidence: 99%

High‐Performance Flexible Asymmetric Supercapacitors Facilitated by N‐doped Porous Vertical Graphene Nanomesh Arrays

et al. 2019

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What is the most significant result of this study?The most significant result is that the N-doped porous vertical graphene nanomesh arrays on af lexible carboncloth substrate demonstrate severala dvantages, including large surfacea rea, high electrical conductivity,f ast electron transfer andu nique mechanical properties. This gives rise to an improved electrochemicalp erformance of the nanohybrid electrode through notable improvements in areal capacitance, as ubstantial decrease in equivalents eries resistance,a nd as ignificant enhancement of rate performance.How did each team member/collaborator contribute to the work?K. Chi and Z. Zhang designed and performed the experiments. X. Zhang and X. Tian carriedo ut the synthesis and conducted the materials characterization. K. Chi conducted the electrochemicale valuation and wrote the paper.Z .W udrew the illustrations. Prof. F. Xiao and Prof. S. Wang supervised the project and finalized the paper.A ll the authors discussed the results and gave approval to the final version of the paper.What other topicsare you working on at the moment?The main research contentso fo ur group include the chemical vapor deposition growth of graphene single crystals,g raphene-based energy storages ystems and devices, graphenebased biosensors, and graphene-based nano-/single atom catalysts.Invited for this month'sc over picture is the group of Prof. Shuai Wang from HuazhongUniversity of Science and Technology (Wuhan, China).T he cover pictures hows the fabrication of N-doped porous vertical graphene nanomesh arrays (NVGMs) on flexiblec arbon cloth substrate and the decoration of MnO 2 nanosheets and polypyrrole films on the NVGMs to develop two types of hierarchical nanohybrid electrodes for flexiblea symmetric supercapacitor.R ead the full text of the Articlea t

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Multicomponent Hierarchical Cu‐Doped NiCo‐LDH/CuO Double Arrays for Ultralong‐Life Hybrid Fiber Supercapacitor

Guo

Hong

Wang

et al. 2019

Adv Funct Materials

357

186

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Fiber supercapacitors have aroused great interest in the field of portable and wearable electronic devices. However, the restrained surface area of fibers and limited reaction kinetics of active materials are unfavorable for performance enhancement. Herein, an efficient multicomponent hierarchical structure is constructed by integrating the Cu-doped cobalt copper carbonate hydroxide@nickel cobalt layered double hydroxide (CCCH@NiCo-LDH) coreshell nanowire arrays (NWAs) on Cu fibers with highly conductive Au-modified CuO nanosheets (CCCH@NiCo-LDH NWAs@Au-CuO/Cu) via a novel in situ corrosion growth method. This multicomponent hierarchical structure contributes to a large accessible surface area, which results in sufficient permeation of the electrolyte. The Cu dopant could reduce the work function and facilitate fast charge transfer kinetics. Therefore, the effective ion diffusion and electron conduction will facilitate the electrochemical reaction kinetics of the electrode. Benefiting from this unique structure, the electrode delivers a high specific capacitance (1.97 F cm −2 /1237 F g −1 /193.3 mAh g −1 ) and cycling stability (90.8% after 30 000 cycles), exhibiting superb performance compared with most oxide-based fiber electrodes. Furthermore, the hybrid fiber supercapacitor of CCCH@NiCo-LDH NWAs@Au-CuO/Cu//VN/carbon fibers is fabricated, providing a remarkable maximal energy density of 34.97 Wh kg −1 and a power density of 13.86 kW kg −1 , exhibiting a great potential in highperformance fiber-shape energy-related systems.

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Ultrafast All‐Solid‐State Coaxial Asymmetric Fiber Supercapacitors with a High Volumetric Energy Density

Cited by 92 publications

References 68 publications

All Hierarchical Core–Shell Heterostructures as Novel Binder‐Free Electrode Materials for Ultrahigh‐Energy‐Density Wearable Asymmetric Supercapacitors

All Hierarchical Core–Shell Heterostructures as Novel Binder‐Free Electrode Materials for Ultrahigh‐Energy‐Density Wearable Asymmetric Supercapacitors

High‐Performance Flexible Asymmetric Supercapacitors Facilitated by N‐doped Porous Vertical Graphene Nanomesh Arrays

Multicomponent Hierarchical Cu‐Doped NiCo‐LDH/CuO Double Arrays for Ultralong‐Life Hybrid Fiber Supercapacitor

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