Rational design of hierarchically porous birnessite-type manganese dioxides nanosheets on different one-dimensional titania-based nanowires for high performance supercapacitors

Zhang, Jintao; Kuang, Min; Hao, Xiaodong; Liu, Yan; Huang, Ming; Guo, Xiao Long; Yan, Jing; Han, Gen Quan; Li, Jing

doi:10.1016/j.jpowsour.2014.07.114

Cited by 53 publications

(16 citation statements)

References 55 publications

(40 reference statements)

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“…346,347 Hence, introducing TiO 2 to construct the MnO 2 -TiO 2 composite will be an excellent strategy. [348][349][350] For example, hierarchical TiO 2 nanobelts@MnO 2 ultrathin nanoakes core-shell composite arrays were fabricated on a Ti foil substrate by a hydrothermal approach and further investigated as the electrode for a supercapacitor. 351 The composite electrode exhibited a specic capacitance as high as 557.6 F g À1 at a scan rate of 200 mV s À1 (454.2 F g À1 at a current density of 0.2 A g À1 ) in 1 M Na 2 SO 4 aqueous solution.…”

Section: Mno 2 -Conductive Metal Composites For Scsmentioning

confidence: 99%

MnO₂-based nanostructures for high-performance supercapacitors

et al. 2015

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Section: Mno 2 -Conductive Metal Composites For Scsmentioning

confidence: 99%

MnO₂-based nanostructures for high-performance supercapacitors

et al. 2015

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“…The EDLCs operate on surface absorption at the electrode materials and electrolyte interfaces. Numerous carbon materials such as carbon aerogels, graphene and mesoporous carbons with high surface area have been used as electrode materials for SCs [2]. The PCs are based on faradaic redox reactions which occur at the electrode surfaces and its bulk fragment.…”

Section: Introductionmentioning

confidence: 99%

“…Tremendous effort have been done by researchers in order to improve energy and power densities of the device using TMOs due to their availability along with multiple electron transfer and variable oxidation states during faradaic reactions [2,3]. Among TMOs, MnO2based electrodes are considered as most preferable for SCs fabrication due to their environmental friendly, natural abundance, low cost, wide potential window, and good electrochemical performance compared to RuO2 electrode which is limited by its high cost and low abundance [2,[4][5][6][7]. Manganese oxides can be existed in several allotropes including  and λ due to the different arrangement of linkage of the basic [MnO6] octahedral unit.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Evaluation of Fluorinated MnO2 for Supercapacitor Application

Najwa

Khairiyyah

Misnon

et al. 2018

MATEC Web of Conferences

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Supercapacitors (SCs) functioning as alternative energy storage is useful in most electronic devices, renewable energy system and hybrid vehicles that have high demand in these days. Excellent electrochemical performance, environment friendliness and low cost material are needed to fulfil the energy demand by most developed country. In this study, fluorination treatment on manganese oxide (MnO2) is considered as an effective way to develop better energy storage due to fluorine electronegativity and reactivity when correlate with other element. Hydrothermal method is used to synthesis MnO2 (α–MnO2 and δ–MnO2) and the effect of fluorination (Fα–MnO2 and Fδ–MnO2) on MnO2 surfaces is investigated on the charge storage ability. The crystallinity and functional groups of the samples was confirmed by the X-ray diffractogram and fourier transforms infrared spectroscopy (FTIR). The cyclic voltammetry (CV) and galvanostatic charging–discharging (CDC) analysis in 0.5 M K2SO4 electrolyte shows that F-δ-MnO2 gives the highest Cs value of 184 F g-1 at scan rate of 5 mV s-1 and 66 F g-1 at current density of 0.3 A g-1. The electrochemical impedance spectroscopy shows that the Fδ–MnO2 has the lowest electrode resistances and charge transfer resistance which contributes to high Cs and the high conductivity of electrode.

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“…A semicircle arc at higher frequencies is the due to the charge transfer resistance ( R ct ) which is a combination of faradaic charge transfer resistance in parallel with the double‐layer capacitance ( C dl ). The values for R ct can be directly obtained from the semicircle arc diameter . R ct values are measured as: 3.7 Ω (ZM); 2.0 Ω (ZMN op ); and 0.9 Ω (ZMNG).…”

Section: Resultsmentioning

confidence: 99%

Synthesis and Characterization of Graphene/Binary Metal Molybdate (Graphene/Zn_1−xNi_xMoO₄) Nanocomposite for Supercapacitors

Reddy

Vickraman

Justin

2018

Physica Status Solidi (a)

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A novel graphene/binary metal molybdate (Zn 1-x Ni x MoO 4 ) is synthesized via a facile and simple microwave synthesis route (x ¼ 0.0, 0.2, 0.4, 0.6, 0.8). Electrochemical studies are performed for all the samples to study their charge storage mechanism and frequency dependence in a three-electrode set up with 2M KOH electrolyte solution. Among the samples, Zn 0.6 Ni 0.4-MoO 4 shows better electrochemical performance which is combined with graphene so as to obtain graphene/Zn 1-x Ni x MoO 4 (x ¼ 0.4) nanocomposite. XRD and Raman analyses have confirmed formation of complexation of graphene/binary metal molybdate nanocomposite. TEM morphological profile illustrates little aggregation and interconnected layers of graphene interspersed with rice-like grains of binary metal molybdate. Graphene/Zn 1-x Ni x MoO 4 (x ¼ 0.4) exhibits good energy density and power density of 62.3 Wh kg À1 and 448.5 W kg À1 respectively with a specific capacitance of 555.5 F g À1 at 1 A g À1 . The electrode material with good cyclic stability of 85% even after 5000 charge/discharge cycles may be explored as a novel option for supercapacitors.

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Rational design of hierarchically porous birnessite-type manganese dioxides nanosheets on different one-dimensional titania-based nanowires for high performance supercapacitors

Cited by 53 publications

References 55 publications

MnO₂-based nanostructures for high-performance supercapacitors

MnO₂-based nanostructures for high-performance supercapacitors

Electrochemical Evaluation of Fluorinated MnO2 for Supercapacitor Application

Synthesis and Characterization of Graphene/Binary Metal Molybdate (Graphene/Zn_1−xNi_xMoO₄) Nanocomposite for Supercapacitors

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Rational design of hierarchically porous birnessite-type manganese dioxides nanosheets on different one-dimensional titania-based nanowires for high performance supercapacitors

Cited by 53 publications

References 55 publications

MnO2-based nanostructures for high-performance supercapacitors

MnO2-based nanostructures for high-performance supercapacitors

Electrochemical Evaluation of Fluorinated MnO2 for Supercapacitor Application

Synthesis and Characterization of Graphene/Binary Metal Molybdate (Graphene/Zn1−xNixMoO4) Nanocomposite for Supercapacitors

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Product

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About

MnO₂-based nanostructures for high-performance supercapacitors

MnO₂-based nanostructures for high-performance supercapacitors

Synthesis and Characterization of Graphene/Binary Metal Molybdate (Graphene/Zn_1−xNi_xMoO₄) Nanocomposite for Supercapacitors