An Effective Electrodeposition Mode for Porous MnO2/Ni Foam Composite for Asymmetric Supercapacitors

Tsai, Yi-Chiun; Yang, Wein-Duo; Lee, Kuan-Ching; Huang, Chao-Ming

doi:10.3390/ma9040246

Cited by 57 publications

(27 citation statements)

References 41 publications

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“…Electrodeposition has been developed and used widely for producing metal oxides and hydroxides since it can be carried out under mild condition at room temperature . The electrodeposition produces with different shapes and sizes can be easily obtained through controlling current, potential, solution concentration or time.…”

Section: Resultsmentioning

confidence: 99%

Structure Dependence of Fe‐Co Hydroxides on Fe/Co Ratio and Their Application for Supercapacitors

Jiang

Chang

et al. 2016

Part & Part Syst Charact

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1 of 8) 1600239Fe-Co hydroxides with different Fe/Co atomic ratios grown on nickel foams are synthesized by one-step electrochemical deposition. The prepared samples are characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and transmission electron microscopy. It was found that the influence of initial Fe/Co ratios in the precursor solutions on the structure and electrochemical performance of electrodeposited products is significant. Fe(OH) 3 shows particle shape with average diameter of 200 nm. With addition of Co ions, frame-like structure consisting of smaller particles is formed for Fe-Co hydroxides. Based on the morphology of Co(OH) 2 , it is deduced that Co(OH) 2 serves as a network former constructing a tridimensional frame network structure. Fe-Co hydroxide with Fe/ Co ratio of 1:1 exhibits two types of structure features: nanoflake-like network structure overall and nanoparticle structure with numerous mesoporous microscopically. As the supercapacitor electrode materials, the as-prepared Fe-Co hydroxide electrode with Fe/Co ratio of 1:1 exhibits highest specific capacitance of 2255.6 F g −1 at the current density of 1 A g −1 and also shows good cycling performance of 73.5% capacity retention at current density of 10 A g −1 after 2000 cycles. This work provides a facile method to produce promising Fe-Co hydroxide electrode materials with high performance for supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Structure Dependence of Fe‐Co Hydroxides on Fe/Co Ratio and Their Application for Supercapacitors

Jiang

Chang

et al. 2016

Part & Part Syst Charact

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“…The electrochemical measurements were carried out in both three-electrode configuration for electrodes and two-electrode configuration for symmetric supercapacitors. In the three-electrode setup, the SRAC/Ni was as the working electrode, a Pt foil as the counter electrode, a saturated calomel electrode (SCE) as the reference electrode, and 6 M LiNO 3 aqueous solution as the electrolyte [ 40 ]. The cyclic voltammetry (CV), electrochemical impedance spectroscopy (EIS), and galvanostatic charge–discharge (GCD) measurements were performed with an electrochemical workstation (6273E, CH Instruments, USA).…”

Section: Methodsmentioning

confidence: 99%

Biomass-Derived Porous Carbons Derived from Soybean Residues for High Performance Solid State Supercapacitors

et al. 2020

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A series of heteroatom-containing porous carbons with high surface area and hierarchical porosity were successfully prepared by hydrothermal, chemical activation, and carbonization processes from soybean residues. The initial concentration of soybean residues has a significant impact on the textural and surface functional properties of the obtained biomass-derived porous carbons (BDPCs). SRAC5 sample with a BET surface area of 1945 m2 g−1 and a wide micro/mesopore size distribution, nitrogen content of 3.8 at %, and oxygen content of 15.8 at % presents the best electrochemical performance, reaching 489 F g−1 at 1 A g−1 in 6 M LiNO3 aqueous solution. A solid-state symmetric supercapacitor (SSC) device delivers a specific capacitance of 123 F g−1 at 1 A g−1 and a high energy density of 68.2 Wh kg−1 at a power density of 1 kW kg−1 with a wide voltage window of 2.0 V and maintains good cycling stability of 89.9% capacitance retention at 2A g−1 (over 5000 cycles). The outstanding electrochemical performances are ascribed to the synergistic effects of the high specific surface area, appropriate pore distribution, favorable heteroatom functional groups, and suitable electrolyte, which facilitates electrical double-layer and pseudocapacitive mechanisms for power and energy storage, respectively.

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“…26 Macroporous manganese oxide electrodes were prepared by template-assisted electrodeposition showing specific capacitance 60% higher than that obtained from flat surfaces, without loss of capacitance even after 1000 cycles. 27 In addition, Tsai et al 28 reported the influence of the electrodeposition method on the morphology and capacitive properties of the electrodes. In this work, it was described the preparation of composites based on MnO 2 /Ni foams by three different methods: potentiodynamic (PD), potentiostatic (PS) and a combination of them (PS + PD ) and long cycle life.…”

Section: Introductionmentioning

confidence: 99%

“…27 In addition, Tsai et al 28 reported the influence of the electrodeposition method on the morphology and capacitive properties of the electrodes. In this work, it was described the preparation of composites based on MnO 2 /Ni foams by three different methods: potentiodynamic (PD), potentiostatic (PS) and a combination of them (PS + PD).…”

mentioning

confidence: 99%

“…The highly-porous structure of the (PS + PD) MnO 2 /Ni foams electrodes provides abundant space to the electrolyte transport into the electrode material resulting in excellent electrochemical performance. 28 Also, Ni-Co double hydroxide nanocomposite were electrodeposited on porous NiCo 2 O 4 nanowires previously grown on carbon fiber paper. The composites electrodes showed high specific capacitance (1.64 F cm -2 ) and long cycle life.…”

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confidence: 99%

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Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties

Wolfart¹,

Brito²,

Marchesi³

et al. 2017

J. Braz. Chem. Soc.

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In this manuscript, we report the electrodeposition of nickel-copper alloys in a two steps methodology. Firstly, the copper electrode is oxidized to generate Cu 2+ ions followed by the reduction of both Ni 2+ and Cu 2+. The electrodes were further cycled in KOH to convert the metallic alloy into the respective electroactive hydroxide. This methodology created an electrode with high roughness and distinct electrochemical behavior. The modified electrodes were also characterized by electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM). Finally, the modified electrodes were studied in their supercapacitive properties by galvanostatic charge and discharge curves; the electrodes showed a good specific capacitance of 58 mF cm -2 . The results indicated a new strategy using a simple methodology to modified Cu-electrodes to develop supercapacitors at low cost. Keywords: nickel-copper hydroxides, supercapacitors, electrodeposition, interfacial properties IntroductionNowadays, the worldwide demand for energy impacts the research in new energy storage and conversion devices where it is intended an enhanced efficiency, low-cost and eco-friendly alternative.1-3 Among them, supercapacitors (SCs) arise as a good alternative due to their ease-preparation, long cycle life and fast and reversible redox reactions. [4][5][6] Supercapacitors, ultracapacitors or electrochemical capacitors are devices that combine the power delivery presented in the capacitors and the energy density presented by the batteries. 7 Based on the charge storage mechanism, supercapacitors can be divided into two categories: electrochemical doublelayer capacitors (EDLCs), where the capacitance arises from the charge accumulated at the electrode/electrolyte interface. Carbonaceous materials such as graphene and carbon nanotubes are typical examples vastly employed in EDLCs. 8,9 The second one are the pseudocapacitors, which the charge storage mechanism is based on both double layer capacitance and fast redox reactions at the electrode/electrolyte interface, increasing the overall density of current produced. Typical pseudocapacitors materials are transition metals oxide/hydroxide (TMOH) and conducting polymers. [10][11][12] Amongst the different TMOH used as supercapacitors electrodes, RuO 2 is by far one of the most investigated material due to its high theoretical specific capacitance, long cycle life and rate capability, electrochemical properties and conductivity. 13 However, its high-cost and scarcity is the main drawback related to RuO 2 based materials in commercial devices. In this way, in order to obtain more attractive materials, TMOH alloys based on low-cost metals have been extensively studied.14 Shinde et al.15 studied the incorporation of Mn in CuO/Cu(OH) 2 by successive ionic layer adsorption and reaction (SILAR) technique. The authors have found an improved specific capacitance of 600 F g -1 for the doped material that was ascribed to a change in the morphology occasioned by the Mn doping effect.Another TMOH of i...

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An Effective Electrodeposition Mode for Porous MnO2/Ni Foam Composite for Asymmetric Supercapacitors

Cited by 57 publications

References 41 publications

Structure Dependence of Fe‐Co Hydroxides on Fe/Co Ratio and Their Application for Supercapacitors

Structure Dependence of Fe‐Co Hydroxides on Fe/Co Ratio and Their Application for Supercapacitors

Biomass-Derived Porous Carbons Derived from Soybean Residues for High Performance Solid State Supercapacitors

Nickel-Copper Alloys Modified Electrodes: an Electrochemical Study on their Interfacial and Supercapacitive Properties

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