Electrochemical micro-capacitors of patterned electrodes loaded with manganese oxide and carbon nanotubes

Liu, Chi-Chie; Tsai, Dah–Shyang; Chung, Wen‐Hung; Li, Kuan-Wei; Lee, Kuei‐Yi; Huang, Y. S.

doi:10.1016/j.jpowsour.2011.02.050

Cited by 76 publications

(40 citation statements)

References 35 publications

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“…As described in Table S8, all these electrodes/devices have different thicknesses, and thus the conclusions drawn above may or may not hold if the devices had the same thicknesses (not always explicit in the literature). Figure 6e, this performance is well in the range various other manganese-oxide based symmetric devices [52,53,54,55,56].…”

Section: Evaluation Of the Performance Of Gmoh-gmoh Symmetric Supercasupporting

confidence: 58%

A 2D graphene-manganese oxide nanosheet hybrid synthesized by a single step liquid-phase co-exfoliation method for supercapacitor applications

Mendoza-Sánchez

Coelho

Pokle

et al. 2015

Electrochimica Acta

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Section: Evaluation Of the Performance Of Gmoh-gmoh Symmetric Supercasupporting

confidence: 58%

A 2D graphene-manganese oxide nanosheet hybrid synthesized by a single step liquid-phase co-exfoliation method for supercapacitor applications

Mendoza-Sánchez

Coelho

Pokle

et al. 2015

Electrochimica Acta

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“…This performance outperforms others 3D porous systems, where the composites based on CNT or carbon nano-fiber textile, which show a drop of the specific capacitance about 77% [41] (5e200 mV s À1 ), 60% [36] (2e100 mV s À1 ) and 40% [40] (2e100 mV s À1 ) with the MnO 2 mass loading of about 0.8, 0.33 and 0.25 mg cm À2 , respectively. This result indicates the ternary composites exhibit the comparable rate capacity with a substantially high mass loading, which is mainly attributed to the unique structure of the ternary composites: (1) the 3D porous nano-structure and the aligned channels of ACNT arrays favor fast electrolyte ion diffusion into the interior region of electrodes, (2) MnO 2 nano-sheets offer the large active surface area and the short diffusion paths for cations, (3) the good interfacial contact provides continuous conductive paths for electrons [48,50]. In addition, the cycle stability tests over 1000 CV cycles for the ternary composites were carried out at a scan rate of 200 mV s À1 .…”

Section: Resultsmentioning

confidence: 99%

Carbon fabric-aligned carbon nanotube/MnO2/conducting polymers ternary composite electrodes with high utilization and mass loading of MnO2 for super-capacitors

Feng

et al. 2012

Journal of Power Sources

143

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“…[12][13][14] Although numerous asymmetric supercapacitors are reported in the literature, there have been very few reports on asymmetric microdevices. 15 18 Although their CNT/MnO x micro-devices exhibited very good power and energy performances, they were only tested up to 1 V because of unbalanced charge between negative and positive electrodes.…”

mentioning

confidence: 99%

Realization of an Asymmetric Interdigitated Electrochemical Micro-Capacitor Based on Carbon Nanotubes and Manganese Oxide

Dinh

Mesnilgrente

Conedera

et al. 2015

J. Electrochem. Soc.

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Asymmetric interdigitated micro-supercapacitors with high resolution, dedicated to energy storage in embedded micro-systems, are fabricated using a simple micro-fabrication process based on the inkjet printing and electrolytic deposition techniques. The process is optimized to realize a carbon nanotubes (cathode)/manganese oxide (anode) hybrid micro-device with a resolution of 100 μm. The cell capacitance reaches a value of 2.4 mF.cm −2 . Moreover, the use of the asymmetric configuration allows extending the working voltage of the device from 1 V to 1.8 V in an aqueous solution. The latest development of low-power integrated circuits, together with the decrease of their dimensions, has made embedded systems increasingly popular. Wearable electronic devices can be integrated in everyday-use objects, and the emerging technology of wireless sensor networks will lead to a wide range of new applications including environmental monitoring, surveillance or assisted medical care. 1In order to be energetically autonomous, efficient energy harvesting and on-board energy storage technologies are still critical issues for embedded micro-systems.Supercapacitors show very interesting characteristics when it comes to these applications, thanks to their extended lifetimes and high power densities. In the past few years, the integration of low profile supercapacitors on a chip have been the subject of intense research and various types of symmetrical micro-supercapacitors, based on aqueous or organic electrolytes, have been realized.2-6 Aqueous electrolytes usually give lower internal resistance and higher specific capacitance than organic electrolytes, are environmentally friendly, and can be used with pseudo-capacitive materials.7 Despite these advantages of aqueous electrolytes, there is a penalty of a restricted operating voltage range, with an upper limit of ca. 1 V because of inevitable water decomposition in such electrolytes -at higher potentials. This upper limit of operating voltage is lower than that of the organic electrolytes which tends to be greater than 2 V.An interesting way to extend the cell voltage of aqueous electrolyte-based supercapacitors beyond the thermodynamic limit of water splitting is to design an asymmetric device, consisting of two different electrodes having high overpotentials for hydrogen and/or oxygen evolutions.8 Couples of carbonaceous (activated carbon, graphene, carbon black, carbon nanotubes. . . ) and MnO 2 materials are one of the representatives of these asymmetric systems. Carbonaceous materials with electrochemical double layer capacitances, usually exhibit low resistance, high stability and cathodic polarizations.9 At the positive electrode, the manganese oxide exhibits a high pseudo-capacitance involving various valence states and can sustain an oxygen evolution overpotential in neutral solutions. 10,11 These materials have been successfully used to widen the potential window of aqueous electrolytes, in order to obtain high energy and power density supercapacitors. 12-14Although nu...

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Electrochemical micro-capacitors of patterned electrodes loaded with manganese oxide and carbon nanotubes

Cited by 76 publications

References 35 publications

A 2D graphene-manganese oxide nanosheet hybrid synthesized by a single step liquid-phase co-exfoliation method for supercapacitor applications

A 2D graphene-manganese oxide nanosheet hybrid synthesized by a single step liquid-phase co-exfoliation method for supercapacitor applications

Carbon fabric-aligned carbon nanotube/MnO2/conducting polymers ternary composite electrodes with high utilization and mass loading of MnO2 for super-capacitors

Realization of an Asymmetric Interdigitated Electrochemical Micro-Capacitor Based on Carbon Nanotubes and Manganese Oxide

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