Electrochemical supercapacitors based on novel hybrid materials made of carbon nanotubes and polyoxometalates

Cuentas-Gallegos, Ana Karina; Martínez-Rosales, Rosa; Baibarac, M.; Gómez‐Romero, Pedro; Rincón, Marina E.

doi:10.1016/j.elecom.2007.06.003

Cited by 128 publications

(90 citation statements)

References 36 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…sensors and fuel cells due to their electrocatalytic properties [7][8][9], and more recently, in supercapacitors [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, they have been incorporated in a diversity of carbon matrices such as activated carbon [15,16,27], carbon cloth and fibers [4,5], gels [6] and aerogels [14], pastes [7,8], nanofibers [12], multiwalled carbon nanotubes [9-11, 13, 28-33], and graphene [10,11,[34][35][36][37] and electrodeposited onto vitreous carbon substrates [38,39]. These types of carbon matrices compared to others can strongly immobilize these molecular oxides, showing low solvent desorption due to covalent bonds between the functional groups present on the surfaces of the carbons and oxides [9,11,13,30,32,40]. It has been studied that the immobilization, anchoring, or addition of these oxides in the carbon matrices involve a strong and irreversible adsorption [11,32,40], which is increased by the microporosity [11,27] and the hydrophilic nature of the carbon matrix [11], and by the creation of oxygen-based functional groups [9,11,13,30,32].…”

Section: Introductionmentioning

confidence: 99%

“…These types of carbon matrices compared to others can strongly immobilize these molecular oxides, showing low solvent desorption due to covalent bonds between the functional groups present on the surfaces of the carbons and oxides [9,11,13,30,32,40]. It has been studied that the immobilization, anchoring, or addition of these oxides in the carbon matrices involve a strong and irreversible adsorption [11,32,40], which is increased by the microporosity [11,27] and the hydrophilic nature of the carbon matrix [11], and by the creation of oxygen-based functional groups [9,11,13,30,32].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Electrochemical study of H3PMo12 retention on Vulcan carbon grafted with NH2 and OH groups

Cuentas-Gallegos

López-Cortina

Brousse

et al. 2015

J Solid State Electrochem

View full text Add to dashboard Cite

In this work, we show a comparative study based on the effects of specific chemical functional groups (-OH, -NH 2 ), grafted on Vulcan carbon (VC) with the incorporation of a specific polyoxometalate (POM), PMo 12 (H 3 PMo 12 O 40 ), to improve electrochemical performance. We observed a decrease in the specific surface area of the grafted matrices (VC-OH and VC-NH 2 ) [1], and the same trend was observed for PMo 12 (POM) incorporation. Our electrochemical studies showed low concentrations of POM in unmodified VCs and higher POM concentrations for grafted matrices (VC-OH and VC-NH 2 ) after 500 voltammetric cycles, especially for the VC grafted with -OH groups (VC-OH-POM). Mechanisms have been proposed for POM interaction with the grafted groups in carbon, emphasizing the role of aqueous medium and redox activity of POM. Cyclic voltammograms suggested the POM anchoring through -OH groups with a strong interaction as a covalent bond, resulting in a surface coverage of 1.66 × 10 −11 mol cm −2. Surface modifications could be extrapolated to other carbons, and the materials could be employed for different potential applications such as photocatalysis, amperometric sensors, fuel cells, and supercapacitors.

show abstract

“…sensors and fuel cells due to their electrocatalytic properties [7][8][9], and more recently, in supercapacitors [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Electrochemical study of H3PMo12 retention on Vulcan carbon grafted with NH2 and OH groups

Cuentas-Gallegos

López-Cortina

Brousse

et al. 2015

J Solid State Electrochem

View full text Add to dashboard Cite

show abstract

“…Their electrochemical properties such as high stability and conductivity, as well as ability to undergo reversible multiple electron transfer redox processes, make them promising materials to construct electrode materials of electrochemical applications in various areas such as electrocatalysis [2], electrochromic and photochromic devices [3,4], corrosion protection [5], ion-selective membranes [6], or electrochemical capacitors [7]. There are two principal types of polyoxometalates structures, namely Keggin ([XM 12 type, where X is the non-metallic element such as P, Si, and As while M is a metal redox center, usually W (VI) , Mo (V) , V (V) , Nb (V) , or Ta (V) [1].…”

Section: Introductionmentioning

confidence: 99%

“…With regard to electrochemical charging in redox supercapacitors, POMs were not commonly used regardless a few recent reports which indicated a large contribution of charge exchanged during multiple redox processes of POMs to overall capacitance [7,14,15,[38][39][40]. Composite materials, which are composed of conducting polymers and POMs [14,15], POMs with CNTs, or activated carbons [7,38], have been already described. Depending on the charge storage mechanism, electrochemical capacitors (often termed as supercapacitors) could be classified into two types [41]: electrical double-layer capacitors (EDLCs) and so-called faradaic (redox-type) capacitors.…”

Section: Introductionmentioning

confidence: 99%

Hybrid materials utilizing polyelectrolyte-derivatized carbon nanotubes and vanadium-mixed addenda heteropolytungstate for efficient electrochemical charging and electrocatalysis

Sosnowska

Góral-Kurbiel

Skunik-Nuckowska

et al. 2013

J Solid State Electrochem

View full text Add to dashboard Cite

Preparation and electrochemical behavior of new hybrid materials composed of multi-walled carbon nanotubes (CNTs) that were derivatized with poly(diallyldimethylammonium) chloride and modified with vanadium-mixed addenda Dawson-type heteropolytungstate, [P 2 W 17 VO 62 ] 8− , is described here. These nanostructured composite systems exhibited fast dynamics of charge propagation. They were characterized by the transport (effectively diffusional) kinetic parameter of approximately 8×10 −8 cm −2 s −1/2 and the specific capacitance parameter of 82 F g −1 (at the charging/discharging current of 200 mA g −1 ). The latter parameter for bare CNTs was found to be only 50 F g −1 under analogous conditions. These observations were based on the results of galvanostatic charging-discharging, cyclic voltammetric, and AC impedance spectroscopic measurements. The improved capacitance properties were attributed to the systems' pseudocapacitive features originating from the fast redox transitions of the [P 2 W 17 VO 62 ] 8− polyanions. In addition to the fast redox conduction, the proposed organicinorganic hybrid materials exhibited interesting electrocatalytic activity toward reduction of bromate in the broad concentration range (sensitivity, 0.24 mA cm −2 mmol −1 dm 3 ).

show abstract

Polyoxometalate‐coupled Graphene via Polymeric Ionic Liquid Linker for Supercapacitors

Yang

Choi

Jung

et al. 2014

Adv Funct Materials

109

View full text Add to dashboard Cite

The integration of electrical double-layer capacitive and pseudocapacitive materials into novel hybrid materials is crucial to realize supercapacitors with high energy and power densities. Here, high levels of energy and power densities are demonstrated in supercapacitors based on a new type of nanohybrid electrode consisting of polyoxometalate (POM)-coupled graphene in which a polymeric ionic liquid (henceforth simply PIL) serves as an interfacial linker. The adoption of PIL in the construction of nanohybrids enables a uniform distribution of discrete POM molecules along with a large surface area of graphene sheets. When testing electrochemical characteristics under a two-electrode system, as-prepared supercapacitors exhibit a high specifi c capacitance (408 F g −1 at 0.5 A g −1 ), rapid rate capability (92% retention at 10 A g −1 ), a long cycling life (98% retention during 2000 cycles), and high energy (56 Wh kg −1 ) and power (52 kW kg −1 ) densities. First-principles calculations and impedance spectroscopy analysis reveal that the PILs enhance the redox reactions of POMs by providing effi cient ion transfer channels and facilitating the charge transfer in the nanohybrids.

show abstract

Electrochemical supercapacitors based on novel hybrid materials made of carbon nanotubes and polyoxometalates

Cited by 128 publications

References 36 publications

Electrochemical study of H3PMo12 retention on Vulcan carbon grafted with NH2 and OH groups

Electrochemical study of H3PMo12 retention on Vulcan carbon grafted with NH2 and OH groups

Hybrid materials utilizing polyelectrolyte-derivatized carbon nanotubes and vanadium-mixed addenda heteropolytungstate for efficient electrochemical charging and electrocatalysis

Polyoxometalate‐coupled Graphene via Polymeric Ionic Liquid Linker for Supercapacitors

Contact Info

Product

Resources

About