Effect of the formulation of the electrode on the pore texture and electrochemical performance of the manganese dioxide-based electrode for application in a hybrid electrochemical capacitor

Gambou-Bosca, Axel; Bélanger, Daniel

doi:10.1039/c3ta14910b

Cited by 39 publications

(24 citation statements)

References 67 publications

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“…4,7,9,17,56 In a previous work, we have reported that the physical mixing of MnO 2 with a carbon black such as Black Pearls (BP) cannot contribute to increase the specific capacitance of the composite electrode despite the high specific surface area of BP relative to a conventional carbon black. 21 In fact, the large pool of ionic species present with BP did not significantly improve the utilization of MnO 2 which remained relatively low. 21 This could be explained by the large MnO 2 particle size and perhaps by a non-efficient distribution of the materials of the composite electrode.…”

Section: Resultsmentioning

confidence: 99%

“…21 In fact, the large pool of ionic species present with BP did not significantly improve the utilization of MnO 2 which remained relatively low. 21 This could be explained by the large MnO 2 particle size and perhaps by a non-efficient distribution of the materials of the composite electrode. 3 Among all the synthesis techniques used to prepare composites, chemical coprecipitation is the most common technique.…”

Section: Resultsmentioning

confidence: 99%

“…Approaches to increase the low specific capacitance of MnO 2 -based electrode include the addition of a conductive additive such as carbons [5][6][7][8][9] or conductive polymers [10][11][12][13][14] to MnO 2 for the fabrication of a composite electrode. On the other hand, the deposition of a thin MnO 2 layer on carbon with various (nano)architectures 7,[15][16][17][18][19][20][21][22][23][24] yielded high capacitance (∼700 F/g) when only the mass of MnO 2 was taking into account. 1,8,9,16 Such composite electrodes show typical specific capacitance in the range of 150-250 F/g.…”

mentioning

confidence: 99%

“…5,8,9,16,[21][22][23][25][26][27][28][29][30][31][32][33] Obtaining good electrochemical performance for MnO 2 -based composite electrodes requires that the electrical contact between MnO 2 and the carbon to be as intimate as possible. 21,34 An attractive approach to achieve it, involves the deposition of MnO 2 onto carbon. 15,22,31,[34][35][36][37][38] By this mean, the effective interfacial area between manganese oxide and the solution is greatly increased.…”

mentioning

confidence: 99%

“…Thus, the reported specific capacitance per mass of manganese dioxide is more dependent on the quantity of MnO 2 than the nature of the conductive carbon. 5,8,9,16,[21][22][23][25][26][27][28][29][30][31][32][33] Obtaining good electrochemical performance for MnO 2 -based composite electrodes requires that the electrical contact between MnO 2 and the carbon to be as intimate as possible. 21,34 An attractive approach to achieve it, involves the deposition of MnO 2 onto carbon.…”

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confidence: 99%

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Chemical Mapping and Electrochemical Performance of Manganese Dioxide/Activated Carbon Based Composite Electrode for Asymmetric Electrochemical Capacitor

Gambou-Bosca

Bélanger

2015

J. Electrochem. Soc.

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A MnO 2 @BP nanocomposite was synthesized by simultaneously reduction of KMnO 4 with Mn(CH 3 COO) 2 .4H 2 O and highly porous Black Pearls 2000 at room temperature. The specific surface area, porosity, crystalline form and conductivity of MnO 2 @BP nanocomposite were characterized by nitrogen gas adsorption measurements, scanning electron microscopy, X-ray diffraction and 4-point probe measurements, respectively. The content of MnO 2 and BP in the composite was determined by thermogravimetric analysis. Chemical mapping using Raman spectroscopy was performed to investigate the distribution of MnO 2 and BP in a composite electrode film prepared with polytetrafluoroethylene (PTFE) as binder. This composite electrode exhibits more homogeneously distributed MnO 2 particles when compared to an electrode made by physical mixing of MnO 2 , BP and PTFE (MnO 2 /BP-PTFE). Also, Raman spectroscopy data of both composite electrodes indicates a loss of electrical conductivity of BP in the case of MnO 2 @BP-PTFE. The electrochemical properties were characterized by cyclic voltammetry in aqueous 0.65 M K 2 SO 4 . The specific capacitance of MnO 2 @BP-PTFE composite electrode was 122 ± 5 F/g, which is statistically equivalent to the capacitance of MnO 2 /BP-PTFE composite electrode (129 ± 6 F/g Owing to its large theoretical capacitance, low cost, environmental friendliness and high density, manganese dioxide (MnO 2 ) is an ideal candidate for positive electrode in asymmetric electrochemical capacitor.1-4 However the performance of MnO 2 -based electrodes is limited by the low electrical and ionic conductivities of MnO 2 . Approaches to increase the low specific capacitance of MnO 2 -based electrode include the addition of a conductive additive such as carbons [5][6][7][8][9] or conductive polymers 10-14 to MnO 2 for the fabrication of a composite electrode. On the other hand, the deposition of a thin MnO 2 layer on carbon with various (nano)architectures 7,15-24 yielded high capacitance (∼700 F/g) when only the mass of MnO 2 was taking into account. 1,8,9,16 Such composite electrodes show typical specific capacitance in the range of 150-250 F/g. Thus, the reported specific capacitance per mass of manganese dioxide is more dependent on the quantity of MnO 2 than the nature of the conductive carbon. 5,8,9,16,[21][22][23][25][26][27][28][29][30][31][32][33] Obtaining good electrochemical performance for MnO 2 -based composite electrodes requires that the electrical contact between MnO 2 and the carbon to be as intimate as possible. 21,34 An attractive approach to achieve it, involves the deposition of MnO 2 onto carbon. 15,22,31,[34][35][36][37][38] By this mean, the effective interfacial area between manganese oxide and the solution is greatly increased. Moreover the contact between MnO 2 and carbon will lead to a high electronic conductivity. MnO 2 has been deposited onto a carbon support by various methods such as sol-gel route, thermal decomposition, electrodeposition, sonochemical synthesis, and redox reaction. 18,31,[34][35]...

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Chemical Mapping and Electrochemical Performance of Manganese Dioxide/Activated Carbon Based Composite Electrode for Asymmetric Electrochemical Capacitor

Gambou-Bosca

Bélanger

2015

J. Electrochem. Soc.

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Multifunctional Carbon for Electrochemical Double‐Layer Capacitors

Assresahegn

Bélanger

2015

Adv Funct Materials

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Multifunctional carbon materials are prepared for application as an active electrode material in an electrochemical capacitor displaying both charge storage and binder properties. The synthesis of the materials involves the functionalization of high surface area Black Pearls 2000 carbon black by a covalent attachment of polyacrylic acid. The polyacrylic acid polymer is formed by atom transfer radical polymerization using 1‐(bromoethyl)benzene groups initially bonded to the carbon by spontaneous grafting from the corresponding diazonium ions. The grafting of 1‐(bromoethyl)benzene and polyacrylic acid is confirmed by thermogravimetric analysis, Fourier transform infrared spectroscopy, energy‐dispersive X‐ray spectroscopy, and nitrogen gas adsorption isotherm. The composite electrode films prepared from the modified carbon are more hydrophilic and have better wettability in an aqueous electrolyte than the one prepared with the unmodified carbon. The modified electrodes also show a higher specific capacitance (≈140 F g−1), a wider working potential window (1.5 V) and excellent specific capacitance retention upon cycling (99.9% after 5000 cycles) in an aqueous 0.65 m K2SO4 electrolyte. Moreover, a relatively high specific capacitance (≈90 F g−1) is maintained at a scan rate of 1000 mV s−1 with the polyacrylic‐acid‐modified carbon electrode.

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Fibril‐Type Textile Electrodes Enabling Extremely High Areal Capacity through Pseudocapacitive Electroplating onto Chalcogenide Nanoparticle‐Encapsulated Fibrils

et al. 2022

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Effective incorporation of conductive and energy storage materials into 3D porous textiles plays a pivotal role in developing and designing high‐performance energy storage devices. Here, a fibril‐type textile pseudocapacitor electrode with outstanding capacity, good rate capability, and excellent mechanical stability through controlled interfacial interaction‐induced electroplating is reported. First, tetraoctylammonium bromide‐stabilized copper sulfide nanoparticles (TOABr‐CuS NPs) are uniformly assembled onto cotton textiles. This approach converts insulating textiles to conductive textiles preserving their intrinsically porous structure with an extremely large surface area. For the preparation of textile current collector with bulk metal‐like electrical conductivity, Ni is additionally electroplated onto the CuS NP‐assembled textiles (i.e., Ni‐EPT). Furthermore, a pseudocapacitive NiCo‐layered double hydroxide (LDH) layer is subsequently electroplated onto Ni‐EPT for the cathode. The formed NiCo‐LDH electroplated textiles (i.e., NiCo‐EPT) exhibit a high areal capacitance of 12.2 F cm−2 (at 10 mA cm−2), good rate performance, and excellent cycling stability. Particularly, the areal capacity of NiCo‐EPT can be further increased through their subsequent stacking. The 3‐stack NiCo‐EPT delivers an unprecedentedly high areal capacitance of 28.8 F cm−2 (at 30 mA cm−2), which outperforms those of textile‐based pseudocapacitor electrodes reported to date.

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Effect of the formulation of the electrode on the pore texture and electrochemical performance of the manganese dioxide-based electrode for application in a hybrid electrochemical capacitor

Cited by 39 publications

References 67 publications

Chemical Mapping and Electrochemical Performance of Manganese Dioxide/Activated Carbon Based Composite Electrode for Asymmetric Electrochemical Capacitor

Chemical Mapping and Electrochemical Performance of Manganese Dioxide/Activated Carbon Based Composite Electrode for Asymmetric Electrochemical Capacitor

Multifunctional Carbon for Electrochemical Double‐Layer Capacitors

Fibril‐Type Textile Electrodes Enabling Extremely High Areal Capacity through Pseudocapacitive Electroplating onto Chalcogenide Nanoparticle‐Encapsulated Fibrils

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