Spinel LiMn2O4 nanohybrid as high capacitance positive electrode material for supercapacitors

Wang, F.X.; Xiao, S.Y.; Zhu, Yusong; Chang, Zheng; Hu, Chenglin; Wu, Yuping; Holze, Rudolf

doi:10.1016/j.jpowsour.2013.07.046

Cited by 121 publications

(45 citation statements)

References 41 publications

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“…Fig. 9(a) shows the representative discharge curves of the LiMn 1.94 Mg 0.03 Si 0.03 O 4 compound at varying rates in the voltage range of 3.20e4.35 V. It can be seen that the two potential plateaus are in good agreement with the previous reports [41,42]. With the increasing of the discharge rate, the separation of two potential plateaus gradually becomes blurred and the plateau potentials shift toward lower voltage.…”

Section: Resultssupporting

confidence: 82%

Synthesis and electrochemical characterizations of spinel LiMn1.94MO4 (M = Mn0.06, Mg0.06, Si0.06, (Mg0.03Si0.03)) compounds as cathode materials for lithium-ion batteries

Zhao

Liu

Cheng

et al. 2015

Journal of Power Sources

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Section: Resultssupporting

confidence: 82%

Synthesis and electrochemical characterizations of spinel LiMn1.94MO4 (M = Mn0.06, Mg0.06, Si0.06, (Mg0.03Si0.03)) compounds as cathode materials for lithium-ion batteries

Zhao

Liu

Cheng

et al. 2015

Journal of Power Sources

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“…38 In this case, the neutral aqueous electrolytes, such as Li2SO4, Na2SO4, K2SO4, and KCl solutions, are widely used in the MnO2 based supercapacitor and electrode materials studies. [41][42][43][44] It has been found that the supercapacitor using a K2SO4 electrolyte can exhibit a specific energy value of 17.6 Wh kg ─1 at a specific power of 2 kW kg ─1 , which is higher than the similarly designed supercapacitor using a Li2SO4 electrolyte. 43 As to the cycling performance, it was recently reported that an asymmetrical supercapacitor consisting of α-MnO2/CNT as positrode and activated carbon as negatrode with Na2SO4 aqueous electrolyte can retain 77 % of its initial capacity after 20,000 charge-discharge cycles at 50 A g ─1 .…”

Section: Aqueous Supercapacitors and Supercapatteriesmentioning

confidence: 99%

“…347 Therefore, the molten salt electrolyte in the DCFCs shares the same advantages as that used in the MCFCs (see Section 5.3.). 41 Potential-time profiles of a mild steel working electrode (5 mm dia. rod) with electro-deposited carbon during anodic oxidation in molten salts under CO2.…”

Section: Direct Carbon Fuel Cellsmentioning

confidence: 99%

Electrolytes for electrochemical energy storage

Xia

et al. 2017

Mater. Chem. Front.

225

116

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A note on versions:The version presented here may differ from the published version or from the version of record. If you wish to cite this item you are advised to consult the publisher's version. Please see the repository url above for details on accessing the published version and note that access may require a subscription.For more information, please contact eprints@nottingham.ac.uk Journal NameThis journal is © The Royal Society of Chemistry 20xxJ. Name., 2013, 00, 1-3 | 1 Electrolyte is a key component of electrochemical energy storage (EES) devices and its properties greatly affect the energy capacity, rate performance, cyclability and safety of all EES devices. This article offers a critical review of recent progresses and challenges in electrolyte research and development particularly for supercapacitors and supercapatteries, recharegable batteries (such as lithium-ion and sodium-ion batteries), and redox flow batteries (including fuel cells in a broad sense). The review will focus on liquid electrolytes, particularly aqueous and organic electrolytes, ionic liquids and molten salts. Influences of electrolyte properties on the performances of different EES devices are discussed in detail.

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“…1 A main function of electrochemical capacitors (ECs, most popular called supercapacitors, regarding confusing terminology see Ref.…”

mentioning

confidence: 99%

Improved Electrochemical Behavior of Amorphous Carbon-Coated Copper/CNT Composites as Negative Electrode Material and Their Energy Storage Mechanism

Liu

Wiek

Dzhagan

et al. 2016

J. Electrochem. Soc.

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A composite of copper grown on the surface of CNTs has been fabricated by a redox reaction between copper acetate and ethylene glycol for use as negative electrode at high currents in electrochemical energy storage. Subsequently, the as-prepared Cu/CNT composite was coated with carbon using glucose as carbon source. Structure, morphology and electrochemical performance of the composite were investigated by scanning electron microscopy, X-ray diffraction, XPS, and electrochemical measurements. The carbon coating effectively prevents the dissolution of copper carbonate complexes formed during the electrode reactions Cu 2 (OH) 2 CO 3 + 2e − → ← Cu 2 O + OH − + HCO − 3 and Cu 2 O + H 2 O + 2e − → ← 2Cu + 2OH − , increases the conductivity of the copper constituent in the negative electrode and protects this component against direct contact with the electrolyte solution during cycling. The C/Cu/CNTs composite exhibits higher capacity and better rate behavior as well as excellent cycling stability in 0. Electrochemical energy storage and conversion systems including batteries, fuel cells, and supercapacitors have attracted considerable attention in recent years since they can improve efficient use of electric energy, and thus reduce emission of greenhouse gases and promote the use of renewable energy.1 A main function of electrochemical capacitors (ECs, most popular called supercapacitors, regarding confusing terminology see Ref.2) is complementing batteries and fuel cells because of their high power capability, they also can provide necessary additional power for acceleration and can store energy during braking in hybrid electric vehicles.3 On a larger scale they can assist in maintaining power quality, 4-8 on a smaller scale they can provide additional power for short periods of time in mobile devices. Thus supercapacitor technology is regarded as a promising means for storing electricity.9 Because frequently materials are employed both in secondary batteries and supercapacitors (on the merger of these fields see Ref. 10,11) 21 All batteries based on pure metals as negative electrode have much higher theoretical capacities because of the smaller atomic weight of elements compared to their corresponding oxides which are frequently employed both in batteries and supercaps (for an overview see Ref.2), according to the equation C = (F · n)/(3.6 M) (C, F, n and M refer to capacity, Faraday constant, number of transferred electrons per unit and atomic/molecular mass, respectively). 22However, most of them -in particular copper -were not investigated in electrochemical capacitors except for a few reports on copperinfiltrated carbonized wood monoliths, 23 cuprous oxide microspherenanosheets, 24 copper-coating of activated carbon used as electrode material in a Li-ion capacitor, 25 copper-doped metal oxides 26 and copper as substrate 27 demonstrating electrochemical activity of copper in alkaline electrolyte solution. Furthermore, copper is a promising candidate electrode material for high power energy storage because of its...

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Spinel LiMn2O4 nanohybrid as high capacitance positive electrode material for supercapacitors

Cited by 121 publications

References 41 publications

Synthesis and electrochemical characterizations of spinel LiMn1.94MO4 (M = Mn0.06, Mg0.06, Si0.06, (Mg0.03Si0.03)) compounds as cathode materials for lithium-ion batteries

Synthesis and electrochemical characterizations of spinel LiMn1.94MO4 (M = Mn0.06, Mg0.06, Si0.06, (Mg0.03Si0.03)) compounds as cathode materials for lithium-ion batteries

Electrolytes for electrochemical energy storage

Improved Electrochemical Behavior of Amorphous Carbon-Coated Copper/CNT Composites as Negative Electrode Material and Their Energy Storage Mechanism

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