Synthesis and electrochemical capacitance of core–shell poly (3,4-ethylenedioxythiophene)/poly (sodium 4-styrenesulfonate)-modified multiwalled carbon nanotube nanocomposites

Chen, Li; Cheng, Yuan; Dou, Hui; Gao, Bo; Chen, Shengyao; Zhang, Xiaogang

doi:10.1016/j.electacta.2008.10.071

Cited by 114 publications

(61 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Recently, anionic poly(sodium-4styrene sulfonate) (PSS) has been used to functionalize CNTs, since it can not only solubilize CNTs effectively in aqueous solution but also noncovalently functionalize CNTs [22 25]. Sidewall functionalization of CNTs with negatively charged PSS can create many more electroactive sites that can tether ions with positive charge for subsequent oriented growth of metal oxide along the CNTs, as verified by our previous work [2,11,23]. Only in this way, can CNTs maintain three-dimensionally interconnected and unblocked pore structures on the nanometer scale, which allows them to retain the ability to absorb and facilitate the transport of electrolyte ions through the remaining porous channels within the composite even in the case of high loadings.…”

mentioning

confidence: 92%

Template-free synthesis of ordered mesoporous NiO/poly(sodium-4-styrene sulfonate) functionalized carbon nanotubes composite for electrochemical capacitors

et al. 2009

Self Cite

View full text Add to dashboard Cite

We report the first example of a practical and efficient template-free strategy for synthesizing ordered mesoporous NiO/poly(sodium-4-styrene sulfonate) (PSS) functionalized carbon nanotubes (FCNTs) composites by calcining a Ni(OH) 2 /FCNTs precursor prepared by refl uxing an alkaline solution of Ni(NH 3 ) x 2+and FCNTs at 97 o C for 1 h. The morphology and structure were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. Thermal decomposition of the precursor results in the formation of ordered mesoporous NiO/FCNTs composite (ca. 48 wt% NiO) with large specifi c surface area. Due to its enhanced electronic conductivity and hierarchical (meso-and macro-) porosity, composite simultaneously meets the three requirements for energy storage in electrochemical capacitors at high rate, namely, good electron conductivity, highly accessibleelectrochemical surface areas owing to the existence of mesopores, and efficient mass transport from the macropores. Electrochemical data demonstrated that the ordered mesoporous NiO/FCNTs composite is capable of delivering a specifi c capacitance (SC) of 526 F/g at 1 A/g and a SC of 439 F/g even at 6 A/g, and show a degradation of only ca. 6% in SC after 2000 continuous charge/discharge cycles. KEYWORDSTemplate-free, ordered mesopores, NiO/carbon nanotubes composite, hierarchical porosity, electrochemical supercapacitors Nano ResearchPseudocapacitance has been studied for various metal oxides, such as RuO 2 [1,2], CoO x [3,4], NiO [5 10], and MnO 2 [11 13], due to their higher specific capacitance (SC) compared to carbon-based materials [1 13] and better stability than conducting polymers [14]. In particular, NiO enjoys a special place due to its easy availability, environmentally benign nature, cost effectiveness, and good pseudocapacitive behavior. Unfortunately, there are still some obstacles to its practical application due to its low observed SC [5 10], considering its theoretical value (2573 F/g within 0.5 V) [5,6]. The key strategy is to maximize the electrochemical utilization of the NiO phase. Pseudocapacitance is an interfacial phenomenon related to the specifi c surface area (SSA) of electroactive materials and involving 723 Nano Res (2009) 2: 722 732 charge transfer through surface Faradaic reactions [15]. Moreover, to obtain high-energy density at larger current densities, it is necessary to fabricate materials with a hierarchical (meso-and macro-) porous structure. The mesoporous structure affords high SSA and electrochemical energy storage of the electroactive material [3], whilst the macropores can absorb and strongly retain electrolyte ions, which ensures suffi cient Faradaic reactions take place at high current densities [16]. Therefore, the development of effective ways to enhance the electronic conductivity and the SSA of NiO phases with hierarchical porosities are of great significance for the nextgeneration electrochemical capacitors (ECs).Recently, carbon nanotubes (CNTs)-based NiO composites have bee...

show abstract

mentioning

confidence: 92%

Template-free synthesis of ordered mesoporous NiO/poly(sodium-4-styrene sulfonate) functionalized carbon nanotubes composite for electrochemical capacitors

et al. 2009

Self Cite

View full text Add to dashboard Cite

show abstract

“…Indeed, the SC measured for nanometric PEDOT/PEDOT-MMT 20% w/w is higher than those determined for conventional nanocomposites of PEDOT and inorganic materials. [42][43][44][45][46][47][48] On the other hand, the SC of micrometric PEDOT/PEDOT-MMT 20% w/w is 41% and 23% higher than those of symmetric PEDOT and PEDOT-MMT/PEDOT-MMT 20% w/w, respectively. This feature corroborates that the incorporation of the exfoliated clay produces a very significant benefit in asymmetric ultracapacitors, independently of the thickness of the films.…”

Section: Fabrication Of Type II Ultracapacitorsmentioning

confidence: 99%

“…MoO 3 , RuO 2 , carbon nanotubes, MnO 2 , and NiFe 2 O 4 ), for which the SC ranged from 153 to 375 F g À1 . [42][43][44][45][46][47][48] However, to the best of our knowledge there is no investigation about the performance of PEDOT-MMT nanocomposites as ultracapacitors.…”

mentioning

confidence: 99%

Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices

et al. 2012

View full text Add to dashboard Cite

Exfoliated nanocomposites of poly(3,4-ethylenedioxythiophene) (PEDOT) and montmorillonite (MMT) have been prepared by in situ anodic polymerization, concentrations of clay ranging from 5% w/w to 50% w/w being included in the aqueous polymerization medium. The morphology, electrical conductivity, adherence, thermal stability, charge storage, specific capacitance, electrostability, doping level and band gap have been determined for the different PEDOT-MMT nanocomposites and compared with those of pristine PEDOT. Many of these properties have been found to depend on both the concentration of clay and the thickness (micrometric or nanometric) of the generated films. Types I and II ultracapacitors have been fabricated using nanometric and micrometric films of PEDOT and PEDOT-MMT. The properties of such devices have been characterized and compared with those reported in the literature for ultracapacitors fabricated using nanocomposites of PEDOT and other inorganic materials. Both nanometric and micrometric type II ultracapacitors, which correspond to an asymmetric configuration of PEDOT and PEDOT-MMT films, have been found to present the better properties (e.g. the specific capacitance for nanometric and micrometric devices is 429 and 116 F g À1 , respectively), evidencing the favorable effect of the clay. Finally, the effects of the electrochemical degradation on the ultracapacitors have been rationalized using electrochemical impedance spectroscopy.

show abstract

“…The third category is also pseudo-capacitor based on faradic reactions, but the electrode materials are electronically conducting polymers [36], or their composites such as polypyrrole (PPy) [37,38], polyaniline (PANi) [39,40], poly(3,4-ethylenedioxythiophene) (PEDOT) [41], and so on. This type of conducting polymers has a relatively high conductivity, and a relatively low cost compared to carbon-based electrode materials [42].…”

Section: Conducting-polymers-based Supercapacitorsmentioning

confidence: 99%

Review of Electrochemical Capacitors Based on Carbon Nanotubes and Graphene

Li¹,

Cheng²,

Shashurin³

et al. 2012

Graphene

109

View full text Add to dashboard Cite

Electrochemical capacitors, which can store large amount of electrical energy with the capacitance of thousands of Farads, have recently been attracting enormous interest and attention. Carbon nanostructures such as carbon nanotubes and graphene are considered as the potentially revolutionary energy storage materials due to their excellent properties. This paper is focused on the application of carbon nanostructures in electrochemical capacitors, giving an overview regarding the basic mechanism, design, fabrication and achievement of latest research progresses for electrochemical capacitors based on carbon nanotubes, graphene and their composites. Their current challenges and future prospects are also discussed.

show abstract

Synthesis and electrochemical capacitance of core–shell poly (3,4-ethylenedioxythiophene)/poly (sodium 4-styrenesulfonate)-modified multiwalled carbon nanotube nanocomposites

Cited by 114 publications

References 40 publications

Template-free synthesis of ordered mesoporous NiO/poly(sodium-4-styrene sulfonate) functionalized carbon nanotubes composite for electrochemical capacitors

Template-free synthesis of ordered mesoporous NiO/poly(sodium-4-styrene sulfonate) functionalized carbon nanotubes composite for electrochemical capacitors

Hybrid polythiophene–clay exfoliated nanocomposites for ultracapacitor devices

Review of Electrochemical Capacitors Based on Carbon Nanotubes and Graphene

Contact Info

Product

Resources

About