Asymmetric supercapacitors based on β-Ni(OH)2 nanosheets and activated carbon with high energy density

Huang, Jichun; Xu, Panpan; Cao, Dianxue; Zhou, Xiaobin; Yang, Shuangming; Li, Yiju

doi:10.1016/j.jpowsour.2013.07.105

Cited by 278 publications

(130 citation statements)

References 56 publications

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“…have been extensively investigated as electrode materials for pseudocapacitors [23][24][25][26][27][28][29]. Among them, MnO 2 nanostructures (NSs) have received considerable attention because of their high theoretical specific capacitance, environmental friendliness, low cost, and low toxicity [30,31].…”

Section: Introductionmentioning

confidence: 99%

A facile one-step approach to hierarchically assembled core–shell-like MnO2@MnO2 nanoarchitectures on carbon fibers: An efficient and flexible electrode material to enhance energy storage

Nagaraju

Min

et al. 2016

Nano Res.

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Hierarchical core-shell-like MnO 2 nanostructures (NSs) were used to anchor MnO 2 hexagonal nanoplate arrays (HNPAs) on carbon cloth (CC) fibers. The NSs were prepared by a novel one-step electrochemical deposition method. Under an external cathodic voltage of 2.0 V for 30 min, hierarchical core-shell-like MnO 2 -NS-decorated MnO 2 HNPAs (MnO 2 NSs@MnO 2 HNPAs) were uniformly grown on CC with reliable adhesion. The phase purity and morphological properties of the samples were characterized by various physicochemical techniques. At a constant external cathodic voltage, growth of MnO 2 NSs@MnO 2 HNPAs on CC was carried for different time periods. When utilized as a flexible, robust, and binder-free electrode for pseudocapacitors, the hierarchical core-shell-like MnO 2 NSs@MnO 2 HNPAs on CC showed clearly enhanced electrochemical properties in 1 M Na 2 SO 4 electrolyte solution. The results indicate that the MnO 2 NSs@MnO 2 HNPAs on CC have a maximum specific capacitance of 244.54 F/g at a current density of 0.5 A/g with excellent cycling stability compared to that of bare MnO 2 HNPAs on CC (112.1 F/g at 0.5 A/g current density). We believe that the superior charge storage performance of the pseudocapacitive electrode can be mainly attributed to the hierarchical MnO 2 NSs@MnO 2 HNPAs building blocks that have a large specific surface area, offering additional electroactive sites for efficient electrochemical reactions. The facile and single-step approach to growth of hierarchical pseudocapacitive materials on textile based electrodes opens up the possibility for the fabrication of high-performance flexible energy storage devices.

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Section: Introductionmentioning

confidence: 99%

A facile one-step approach to hierarchically assembled core–shell-like MnO2@MnO2 nanoarchitectures on carbon fibers: An efficient and flexible electrode material to enhance energy storage

Nagaraju

Min

et al. 2016

Nano Res.

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“…The operation voltage of ASCs can be extended through combining complementary potential windows of positive and negative electrodes to get higher energy density [7]. Recently, tremendous research efforts have been concentrated on developing various ASCs for improving energy density such as MnO 2 //carbon nanotube (CNT) [9], Ni(OH) 2 //activated carbon (AC) [10], NiCo 2 O 4 -rGO//AC [11], MnO 2 //graphene [12], Co(OH) 2 //AC [13], K x MnO 2 //AC [14], PPy@MoO 3 //AC [15], etc. Unfortunately, the improvement of energy density in these ASCs is always at the price of sacrificing the high power density.…”

Section: Introductionmentioning

confidence: 99%

Co(OH)2 Nanosheets Coupled With CNT Arrays Grown on Ni Mesh for High-Rate Asymmetric Supercapacitors with Excellent Capacitive Behavior

Peng

Wang

et al. 2015

Electrochimica Acta

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“…8, the LNF-0.7//LNF-0.7 and LNF-0.7//AC devices exhibit capacitive retention of ∼97% and ∼80%, respectively. Notably, the LNF-0.7//LNF-0.7 device is superior to the LNF-0.7//AC supercapacitor and those reported for symmetric/asymmetric devices, such as C@MnO 2 //AC (90.5% retention after 5000 cycles) [54] , Fe 3 O 4 /CNFs// Fe 3 O 4 /CNFs (91% retention after 1000 cycles) [55] , Ni(OH) 2 //AC (92% retention after 1000 cycles) [56] , Fe 2 O 3 /FGS//MnO 2 /FGS (95% retention after 5000 cycles) [57] , MnO 2 //CNT-CNF (92% retention after 2000 cycles) [58] and NiMoO 4 //AC (85.7% retention after 10000 cycles) [59] .…”

Section: 3 Electrochemical Stabilitiesmentioning

confidence: 99%

Symmetric/Asymmetric Supercapacitor Based on the Perovskite-type Lanthanum Cobaltate Nanofibers with Sr-substitution.

Cao

Lin

Sun

et al. 2015

Electrochimica Acta

130

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Asymmetric supercapacitors based on β-Ni(OH)2 nanosheets and activated carbon with high energy density

Cited by 278 publications

References 56 publications

A facile one-step approach to hierarchically assembled core–shell-like MnO2@MnO2 nanoarchitectures on carbon fibers: An efficient and flexible electrode material to enhance energy storage

A facile one-step approach to hierarchically assembled core–shell-like MnO2@MnO2 nanoarchitectures on carbon fibers: An efficient and flexible electrode material to enhance energy storage

Co(OH)2 Nanosheets Coupled With CNT Arrays Grown on Ni Mesh for High-Rate Asymmetric Supercapacitors with Excellent Capacitive Behavior

Symmetric/Asymmetric Supercapacitor Based on the Perovskite-type Lanthanum Cobaltate Nanofibers with Sr-substitution.

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