Sepiolite/amorphous nickel hydroxide hierarchical structure for high capacitive supercapacitor

Chen, Xiaoyan; Wang, Qianqian; Qiao, Gaoqun; Wang, Xiaohu; Lu, Guixia; Cui, Hongzhi; Wang, Xinzhen

doi:10.1016/j.jallcom.2021.160519

Cited by 20 publications

(5 citation statements)

References 52 publications

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“…This 3D hierarchically structured morphology maintained long-term cyclability and remarkable specific capacitance of the ASC device, demonstrating the successful composition of metal oxides (SnO 2 and Fe 2 O 3 ) and PPy [ 102 ]. Finally, the energy and power densities of the device were calculated and compared with densities of other hierarchically structured all-solid-state ASC devices ( Figure 9 d) [ 103 , 104 , 105 , 106 , 107 , 108 , 109 , 110 , 111 ]. The CNF/SnO 2 /PPy//CNF/Fe 2 O 3 //PPy ASC device exhibited energy and power densities of 56.2 Wh kg −1 and 0.99 kW kg −1 at 1 A g −1 , respectively.…”

Section: Resultsmentioning

confidence: 99%

“…( d ) Ragone plot of the ASC device, compared to other all-solid-state ASC devices. Reproduced by: Sun et al, 2017 [ 103 ], Bai X. et al, 2017 [ 104 ], Yu et al, 2018 [ 105 ], Chen X. et al, 2021 [ 106 ], Liu et al, 2018 [ 107 ], Bai Y. et al, 2015 [ 108 ], Lai et al, 2016 [ 109 ], Jeyaranjan et al, 2019 [ 110 ], and Chen Y. et al, 2022 [ 111 ].…”

Section: Figurementioning

confidence: 99%

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3D Hierarchically Structured Tin Oxide and Iron Oxide-Embedded Carbon Nanofiber with Outermost Polypyrrole Layer for High-Performance Asymmetric Supercapacitor

et al. 2023

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Herein, unique three-dimensional (3D) hierarchically structured carbon nanofiber (CNF)/metal oxide/conducting polymer composite materials were successfully synthesized by combinations of various experimental methods. Firstly, base CNFs were synthesized by carbonization of electrospun PAN/PVP fibers to attain electric double-layer capacitor (EDLC) characteristics. To further enhance the capacitance, tin oxide (SnO2) and iron oxide (Fe2O3) were coated onto the CNFs via facile hydrothermal treatment. Finally, polypyrrole (PPy) was introduced as the outermost layer by a dispersion polymerization method under static condition to obtain 3D-structured CNF/SnO2/PPy and CNF/Fe2O3/PPy materials. With each synthesis step, the morphology and dimension of materials were transformed, which also added the benign characteristic for supercapacitor application. For the practical application, as-synthesized CNF/SnO2/PPy and CNF/Fe2O3/PPy were applied as active materials for supercapacitor electrodes, and superb specific capacitances of 508.1 and 426.8 F g−1 (at 1 A g−1) were obtained (three-electrode system). Furthermore, an asymmetric supercapacitor (ASC) device was assembled using CNF/SnO2/PPy as the positive electrode and CNF/Fe2O3/PPy as the negative electrode. The resulting CNF/SnO2/PPy//CNF/Fe2O3/PPy device exhibited excellent specific capacitance of 101.2 F g−1 (at 1 A g−1). Notably, the ASC device displayed a long-term cyclability (at 2000 cycles) with a retention rate of 81.1%, compared to a CNF/SnO2//CNF/Fe2O3 device of 70.3% without an outermost PPy layer. By introducing the outermost PPy layer, metal oxide detachment from CNFs were prevented to facilitate long-term cyclability of electrodes. Accordingly, this study provides an effective method for manufacturing a high-performance and stable supercapacitor by utilizing unique 3D hierarchical materials, comprised of CNF, metal oxide, and conducting polymer.

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Section: Resultsmentioning

confidence: 99%

Section: Figurementioning

confidence: 99%

3D Hierarchically Structured Tin Oxide and Iron Oxide-Embedded Carbon Nanofiber with Outermost Polypyrrole Layer for High-Performance Asymmetric Supercapacitor

et al. 2023

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“…Transition/non-transition metal oxides, hydroxides, chalcogenides, and conducting polymers are generally considered to be significant pseudocapacitive/battery-type materials. 70–90 This section will focus on the current progress of these materials as SC electrodes. The most widely investigated pseudocapacitive/battery-type materials are metal oxides, notably the transition metal oxides.…”

Section: Metal Oxide-based Materials For Supercapacitorsmentioning

confidence: 99%

Advances in pseudocapacitive and battery-like electrode materials for high performance supercapacitors

et al. 2022

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“…It was observed that a maximum energy density of 26.50 Wh/kg can be achieved with a power density of 0.82 kW/kg, and a maximum power density can reach up to 16.50 kW/kg, whereas the energy density still maintains 11.34 Wh/kg, confirming the outstanding rate performance of our Ni(OH) 2 -36//AC ASC. Impressively, these results outperform those of a Ni(OH) 2 -based supercapacitor, such as α-Ni(OH) 2 nanosheet//AC (22.00 Wh/kg at 0.80 kW/kg) [24], 3D-ICHA α-Ni(OH) 2 //AC (14.86 Wh/kg at 0.14 kW/kg) [11], Co(OH)F/Ni(OH) 2 //AC (13.80 Wh/kg at 0.53 kW/kg) [42], SEP/Ni(OH) 2 //AC (24.00 Wh/kg at 0.95 kW/kg) [22] and Ni(OH) 2 /PNTs//Ni(OH) 2 /PNTs (18.80 Wh/kg at 0.41 kW/kg) [48]. Figure 5f shows the cycling performance of the ASC.…”

Section: Electrochemical Performancesmentioning

confidence: 99%

Template-Free Preparation of α-Ni(OH)2 Nanosphere as High-Performance Electrode Material for Advanced Supercapacitor

Zhang

et al. 2022

Nanomaterials

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Although it is one of the promising candidates for pseudocapacitance materials, Ni(OH)2 is confronted with poor specific capacitance and inferior cycling stability. The design and construction of three-dimensional (3D) nanosphere structures turns out to be a valid strategy to combat these disadvantages and has attracted tremendous attention. In this paper, a 3D α-Ni(OH)2 nanosphere is prepared via a facile and template-free dynamic refluxing approach. Significantly, the α-Ni(OH)2 nanosphere possesses a high specific surface area (119.4 m2/g) and an abundant porous structure. In addition, the as-obtained α-Ni(OH)2 electrodes are investigated by electrochemical measurements, which exhibit a high specific capacitance of 1243 F/g at 1 A/g in 6 M KOH electrolyte and an acceptable capacitive retention of 40.0% after 1500 charge/discharge cycles at 10 A/g, which can be attributed to the sphere’s unique nanostructure. Furthermore, the as-assembled Ni(OH)2-36//AC asymmetric supercapacitor (ASC) yields a remarkable energy density of 26.50 Wh/kg, with a power density of 0.82 kW/kg. Notably, two ASCs in series can light a 2.5 V red lamp sustainably for more than 60 min, as well as power an LED band with a rated power of 25 W. Hence, this 3D α-Ni(OH)2 nanosphere may raise great potential applications for next-generation energy storage devices.

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Sepiolite/amorphous nickel hydroxide hierarchical structure for high capacitive supercapacitor

Cited by 20 publications

References 52 publications

3D Hierarchically Structured Tin Oxide and Iron Oxide-Embedded Carbon Nanofiber with Outermost Polypyrrole Layer for High-Performance Asymmetric Supercapacitor

3D Hierarchically Structured Tin Oxide and Iron Oxide-Embedded Carbon Nanofiber with Outermost Polypyrrole Layer for High-Performance Asymmetric Supercapacitor

Advances in pseudocapacitive and battery-like electrode materials for high performance supercapacitors

Template-Free Preparation of α-Ni(OH)2 Nanosphere as High-Performance Electrode Material for Advanced Supercapacitor

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