Capacitive properties of PANI/MnO2 synthesized via simultaneous-oxidation route

Zhang, Jie; Shu, Dong; Zhang, Tianren; Chen, Hongyu; Zhao, Haimin; Wang, Yongsheng; Sun, Zhenjie; Tang, Shaoqing; Fang, Xue-Ming; Cao, Xiufang

doi:10.1016/j.jallcom.2012.04.006

Cited by 87 publications

(39 citation statements)

References 39 publications

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“…and conducting polymers (PANI, PVP, PEDOT, PPY etc.) that exhibit pseudocapacitance by the faradaic redox process occurring within the bulk of the material [8][9][10][11][12]. Ruthenium oxide (RuO 2 ) exhibits ideal capacitive behaviour, but its applicability was hindered by high cost and toxicity which made the search for alternating high performance electrode material inevitable [13,14].…”

Section: Introductionmentioning

confidence: 99%

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Naveen

Manimaran

Selvasekarapandian

2015

J Mater Sci: Mater Electron

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Cobalt oxide (Co 3 O 4 )-graphene nanosheets (GNS) composite was prepared using a novel route. Room temperature prepared graphite oxide was exfoliated at low temperature and subsequently reduced to GNS by chemical method. Successful compound formation was confirmed and structural details were obtained from XRD studies. Cobalt oxide was found to crystallize in spinel fcc structure with average crystallite size of 9 nm in the composite. FTIR and XPS study confirms the removal of oxygen containing functional group in reduced graphene and spinel formation of cobalt oxide in the composite. Raman spectra depict the reestablishment of sp 2 conjugated network of carbon atoms, on reduction to graphene. FESEM images reveal the nanosheet like morphology of the graphene being retained in the composite and promoting ion diffusion channels. Electrochemical characterization discloses the pseudocapacitive behaviour of the composite material. Higher specific capacitance of 650 F/g was exhibited by GNS-Co 3 O 4 at 5 mV/s scan rate. Symmetrical supercapacitor fabricated using GNS-Co 3 O 4 demonstrated superior power characteristics. Graphene in the composite has substantially increased the electron and ion transport in the electrode material leading to enhanced performance.

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Section: Introductionmentioning

confidence: 99%

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Naveen

Manimaran

Selvasekarapandian

2015

J Mater Sci: Mater Electron

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“…As is shown in Figure 4, The MnO 2 has a weight loss of 20% which is due to the removal of water existing both on the surface and in the lattice of the nanostructure before 250˝C [53]. The trace loss of MnO 2 between 500 and 700˝C is ascribed to the evolution of oxygen caused by the transformation from MnO 2 to Mn 2 O 3 [54]. Figure 5 reveals that the PANI/MnO 2 possesses a typical four-step decomposition, which emerges a larger weightlessness that is mainly due to the decomposition of PANI between 500 and 700˝C [55,56].…”

Section: Tg and Dtg Analysismentioning

confidence: 96%

“…During the process of polyaniline protonation, the molecular chain is positively charged due to the H + attached to molecular chain. In order to maintain electric neutrality, the I − combined with polyaniline molecular chain where reversible redox reactions occurred, the schematic diagram is shown in Figure 7 Figure 6a shows the CV curves of the PANI/mesoporous MnO 2 and MnO 2 measured at a scan rate of 5 mv/s in 1 mol/L H 2 SO 4 and 0.2 mol/L KI solution in the potential range of´0.3 and 0.7 V. The PANI/mesoporous MnO 2 covers more current area than MnO 2 due to: (1) the inter-molecule between PANI and MnO 2 contact well; and (2) the PANI attached on the surface of MnO 2 is involved in oxidation-reduction reactions between different valence states of iodine ions [54,57]. During the process of polyaniline protonation, the molecular chain is positively charged due to the H + attached to molecular chain.…”

Section: Tg and Dtg Analysismentioning

confidence: 99%

High Specific Capacitance of Polyaniline/Mesoporous Manganese Dioxide Composite Using KI-H2SO4 Electrolyte

Jiang

et al. 2015

Polymers

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Abstract:The PANI/Mesoporous MnO 2 composites were prepared through a simple one step method and we introduced the KI-H 2 SO 4 solution as the electrolyte of PANI/MnO 2 composites creatively. The characterization of structure, morphology, and composition are obtained by X-ray diffraction, Fourier transform infrared spectroscopy, thermal gravity analysis, Raman spectra, and scanning electron microscope. The electrochemical performances were investigated by constant-current charge-discharge, the voltammetry curve, and alternating current (AC) impedance technique. The specific capacitance of composites is 1405 F/g, which is almost 10 times larger than MnO 2 (158 F/g). We also find that the iodide concentration is closely related to the specific capacitance. Therefore, we explored the specific capacitance at different iodide concentration (0.05, 0.1, 0.2, 0.5, and 1 M), the results indicated that the specific capacitance reached a maximum value (1580 F/g) at 0.5 mol/L. Additionally, the PANI/Mesoporous MnO 2 composites not only exhibited a good ratio discharge property (857 F/g) at high current density, but also revealed an excellent cycling stability after 500 cycles, which retained 90% of the original specific capacitance.

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“…In addition, the speci¯c capacitance retains approximately 84% of the initial value after 10 000 cycles, indicating the good cycle stability of the composite electrode. 76 With excellent conductivity and mechanical stability, PANI polymers enable enhanced electrochemical and mechanical properties of the composites. Another study on MnO 2 -based electrode with the addition of PPy showed the improved speci¯c capacitance of the MnO 2 -PPy nanocomposite (290 F/g) compared to that of pure MnO 2 electrode (221 F/g).…”

Section: Manganese Oxide (Mno 2 )-Based Compositesmentioning

confidence: 99%

A Review of Metal Oxide Composite Electrode Materials for Electrochemical Capacitors

Khiew

Isa

et al. 2014

NANO

166

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With the emerging technology in the 21st century, which requires higher electrochemical performances, metal oxide composite electrodes in particular o®er complementary properties of individual materials via the incorporation of both physical and chemical charge storage mechanism together in a single electrode. Numerous works reviewed herein have identi¯ed a wide variety of attractive metal oxide-based composite electrode material for symmetric and asymmetric electrochemical capacitors. The focus of the review is the detailed literature data and discussion regarding the electrochemical performance of various metal oxide composite electrodes fabricated from di®erent con¯gurations including binary and ternary composites. Additionally, projection of future development in hybrid capacitor coupling lithium metal oxides and carbonaceous materials are found to obtain signi¯cantly higher energy storage than currently available commercial electrochemical capacitors. This review describes the novel concept of lithium metal oxide electrode materials which are of value to researchers in developing high-energy and 1430002-1 NANO: Brief Reports and Reviews Vol. 9, No. 6 (2014) enhanced-cyclability electrochemical capacitors comparable to Li-ion batteries. In order to fully exploit the potential of metal oxide composite electrode materials, developing low cost, environment-friendly nanocomposite electrodes is certainly a research direction that should be extensively investigated in the future.

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Capacitive properties of PANI/MnO2 synthesized via simultaneous-oxidation route

Cited by 87 publications

References 39 publications

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

Cobalt oxide (Co3O4)/graphene nanosheets (GNS) composite prepared by novel route for supercapacitor application

High Specific Capacitance of Polyaniline/Mesoporous Manganese Dioxide Composite Using KI-H2SO4 Electrolyte

A Review of Metal Oxide Composite Electrode Materials for Electrochemical Capacitors

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