High-performance hybrid supercapacitors based on self-supported 3D ultrathin porous quaternary Zn-Ni-Al-Co oxide nanosheets

Zhang, Qiaobao; Zhao, Bote; Wang, Jiexi; Qu, Chong; Sun, Haibin; Zhang, Kaili; Liu, Meilin

doi:10.1016/j.nanoen.2016.08.049

Cited by 177 publications

(90 citation statements)

References 67 publications

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“…As shown in Figure S8b, Supporting Information, two characteristic peaks of Zn 2p 3/2 and Zn 2p 1/2 appeared at the binding energies of 1022.1 and 1045.3 eV. [51][52][53][54][55][56] In addition, the test results display that the atomic ratio of Zn, Co, and Ni is 11:14:21 approximately, which is in good agreement with the analysis results of EDS. Co 2p XPS spectra were analyzed and fitted with two spin-orbital peaks.…”

Section: Resultssupporting

confidence: 66%

Hybrid Supercapacitors Based on Interwoven CoO‐NiO‐ZnO Nanowires and Porous Graphene Hydrogel Electrodes with Safe Aqueous Electrolyte for High Supercapacitance

Sun

Wang

et al. 2019

Adv Elect Materials

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pollution. [6,7] The electrode material is an important factor to determine the performance of supercapacitors. [8] At present, electrode materials are roughly classified into four categories: metal oxides, carbon materials, conductive polymers, metal sulfides, and others. Compared with the other materials, metal oxides are favored by researchers because of their low cost and extremely high theoretical specific capacitance. [9] Various metal oxides, such as CoO, [10] NiO, [11] ZnO, [12,13] Co 3 O 4 , [14] Fe 2 O 3 , [15] and MnO 2 [16,17] have been used as electrode materials for supercapacitors. ZnO is one of the typical semiconductor materials. Due to its good electrochemical activity, large specific surface area, low cost, easy manufacturing, and high mechanical flexibility, it is considered to be a promising electrode material for supercapacitors. [12] However, the theoretical specific capacitance of ZnO limits its application in energy storage fields such as supercapacitor. [18] CoO is applied as electrode widely due to its ultra-high theoretical specific capacitance and high redox activity. [19,20] However, the high electrical resistance and poor electrical conductivity during charge and discharge restrict the cycle stability of CoO. As one of the materials currently used in supercapacitor electrode materials, NiO has the advantages of high theoretical specific capacitance and large specific surface area, but it is well known that its cycle stability and rate performance are poor. [21] Therefore, the composite materials obtained by combining several of them can also take advantage of their long complements and fully exert their synergistic effects, so that the comprehensive electrochemical performance is improved significantly so as to solve the problems of single metal oxide electrode. [22,23] For example, the surface/volume ratio of the nanostructures can increase the specific capacitance exponentially. The urchinlike CoO nanostructures were selected as the framework for depositing NiO nanosheets to construct a graded core/shell CoO@NiO hybrid nanostructure. [24] Unfortunately, although it has a good specific capacitance and energy density, its cycle stability is poor. ZnO/CoO composite in situ grown on Ni foam was produced, although the cycle stability is improved, the general specific capacitance is less satisfactory. [25] Compared with the single metal oxides, the energy density, power density, Metal oxides-based supercapacitors have attracted much attention due to their easy fabrication and ultra-high theoretical specific capacitance. Here, a novel ternary metal oxide (CoO-NiO-ZnO, CNZO) in situ grown on Ni foam (CNZO@Ni foam) is prepared by one-pot hydrothermal synthesis and a subsequent annealing method. Compared with the corresponding binary and single metal oxides of CoO-ZnO, NiO-ZnO, CoO-NiO, CoO, NiO, and ZnO, this ternary metal oxide shows an ultra-high specific capacitance (areal capacitance) of 2115.5 F g −1 (4.23 F cm −2 ) at a current density of 1 A g −1 (2 mA cm −2 ). Further, a hybrid sup...

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Section: Resultssupporting

confidence: 66%

Hybrid Supercapacitors Based on Interwoven CoO‐NiO‐ZnO Nanowires and Porous Graphene Hydrogel Electrodes with Safe Aqueous Electrolyte for High Supercapacitance

Sun

Wang

et al. 2019

Adv Elect Materials

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“…[13][14][15][16][17][18] However, in comparison of the extraordinary advancement obtained by positive electrode materials, the lack of desired negative electrodes restricts the progress of high-performance ASCs. Previously, carbonaceous materials are still the most widely used as negative electrode, giving rise to low-specific capacitance of 100-250 F g −1 .…”

mentioning

confidence: 99%

A High‐Energy Density Asymmetric Supercapacitor Based on Fe₂O₃ Nanoneedle Arrays and NiCo₂O₄/Ni(OH)₂ Hybrid Nanosheet Arrays Grown on SiC Nanowire Networks as Free‐Standing Advanced Electrodes

Zhao

Yuan

Yang

et al. 2018

Advanced Energy Materials

348

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environmentally friendly energy storage devices. As an emerging energy powering sources, supercapacitors (SCs) hold a vital and individual position owing to their high power density, excellent cycling stability, fast charge/discharge process as well as noticeable reliability, tremendously bridging the gap between rechargeable batteries and traditional capacitors in terms of energy density and power density. [1][2][3][4] Nevertheless, their commercial applications are still seriously impeded since energy densities of SCs are far lagging behind rechargeable batteries. [5,6] In the light of the critical parameters that decide the energy density (E = 1/2CV 2 ) of supercapacitor devices, [7][8][9] substantial efforts have been dedicated to maximizing the energy density via elevating the overall cell voltage (V) and total specific capacitance (C) governed by negative and positive electrodes. Configuration of asymmetric supercapacitors (ASCs) has emerged as a desirable strategy because of the expanded V arised from the absolutely opposite potential window of the two dissimilar electrode materials. [10][11][12] Accordingly, considerable research interest has been invested in constructing highly capacitive negative and positive electrode materials.Until now, transition metal oxides, hydroxides, or phosphides, especially Ni-Co compounds with low cost, natural abundance, and environmentally benign, are mostly employed as positive electrode materials in ASCs because they can present variable oxidation states, favorable electrochemical activity, and large theoretical-specific capacitance based on redox reactions, so they have received extensive attentions as perfect candidates in ASCs. [13][14][15][16][17][18] However, in comparison of the extraordinary advancement obtained by positive electrode materials, the lack of desired negative electrodes restricts the progress of high-performance ASCs. Previously, carbonaceous materials are still the most widely used as negative electrode, giving rise to low-specific capacitance of 100-250 F g −1 . [19][20][21][22][23] In this regard, pseudocapacitive negative electrode materials are proposed to be hopeful alternatives, whereas the restricted studies and poor , even when charging the device within 6.5 s, the energy density can still maintain as high as 45 W h kg −1 at 26.1 kW kg −1 , and the ASC manifests long cycling lifespan with 86.6% capacitance retention even after 5000 cycles. This pioneering work not only offers an attractive strategy for rational construction of high-performance SiC NW-based nanostructured electrodes materials, but also provides a fresh route for manufacturing next-generation high-energy storage and conversion systems.

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“…42-1457) and Co 3 O 4 (JCPDS No. 42-1467), indicating that the introduction of nickel ions does not change the spinel structure of the samples [21,31]. According to the results above, it can be concluded that partial Co ions of the spinel Co 3 O 4 are replaced by Ni ions during the electrochemical process while maintaining its crystal structure and morphology, which lead to the formation of the hybrid spinel Co 3 O 4 / NiCo 2 O 4 nanocomposites [22,23,27,28].…”

Section: Results and Disscussionmentioning

confidence: 98%

电化学离子交换法辅助制备可用作高性能超级电容器电极的Co3O4/NiCo2O4纳米复合材料

et al. 2017

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Electrochemical ion exchange has been used to tailor the composition of transition metal oxides (Co 1060 F g -1 ) at a current density of 5 mA cm -2 and outstanding rate capability as well as long cycle stability. Moreover, the assembled aqueous asymmetric supercapacitor based on Co 3 O 4 /NiCo 2 O 4 //carbon cloth electrodes delivers a considerable energy density of 3.0 mW h cm -3 at power density of 136 mW cm -3 , and high rate capability (85% retention at a current density of 30 mA cm -2 ). A safety light composed of ten green LEDs in parallel was lit for~360 s using two identical supercapacitors in series, indicating a promising practical application.

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High-performance hybrid supercapacitors based on self-supported 3D ultrathin porous quaternary Zn-Ni-Al-Co oxide nanosheets

Cited by 177 publications

References 67 publications

Hybrid Supercapacitors Based on Interwoven CoO‐NiO‐ZnO Nanowires and Porous Graphene Hydrogel Electrodes with Safe Aqueous Electrolyte for High Supercapacitance

Hybrid Supercapacitors Based on Interwoven CoO‐NiO‐ZnO Nanowires and Porous Graphene Hydrogel Electrodes with Safe Aqueous Electrolyte for High Supercapacitance

A High‐Energy Density Asymmetric Supercapacitor Based on Fe₂O₃ Nanoneedle Arrays and NiCo₂O₄/Ni(OH)₂ Hybrid Nanosheet Arrays Grown on SiC Nanowire Networks as Free‐Standing Advanced Electrodes

电化学离子交换法辅助制备可用作高性能超级电容器电极的Co3O4/NiCo2O4纳米复合材料

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High-performance hybrid supercapacitors based on self-supported 3D ultrathin porous quaternary Zn-Ni-Al-Co oxide nanosheets

Cited by 177 publications

References 67 publications

Hybrid Supercapacitors Based on Interwoven CoO‐NiO‐ZnO Nanowires and Porous Graphene Hydrogel Electrodes with Safe Aqueous Electrolyte for High Supercapacitance

Hybrid Supercapacitors Based on Interwoven CoO‐NiO‐ZnO Nanowires and Porous Graphene Hydrogel Electrodes with Safe Aqueous Electrolyte for High Supercapacitance

A High‐Energy Density Asymmetric Supercapacitor Based on Fe2O3 Nanoneedle Arrays and NiCo2O4/Ni(OH)2 Hybrid Nanosheet Arrays Grown on SiC Nanowire Networks as Free‐Standing Advanced Electrodes

电化学离子交换法辅助制备可用作高性能超级电容器电极的Co3O4/NiCo2O4纳米复合材料

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A High‐Energy Density Asymmetric Supercapacitor Based on Fe₂O₃ Nanoneedle Arrays and NiCo₂O₄/Ni(OH)₂ Hybrid Nanosheet Arrays Grown on SiC Nanowire Networks as Free‐Standing Advanced Electrodes