Enhancement in the supercapacitive storage performance of MnCO3 using SiOx nanofluid-based electrolyte

Vardhan, P. Vishnu; Idris, Mustapha Balarabe; Manikandan, S.; Rajan, K.; Devaraj, S.

doi:10.1007/s10008-018-3887-1

Cited by 9 publications

(8 citation statements)

References 23 publications

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“…Carbonaceous materials,, conducting polymers and metal oxides, are the three important classes of materials studied for supercapacitors. Recently, metal carbonates are gaining importance owing to their low cost, environmentally benign characteristics, abundant precursors and potential competency with their corresponding metal oxides . Amongst carbonaceous materials; activated carbon, carbon nanotube and graphene have received special attention because of their unrivalled electrical conductivity, excellent rate performance and long cycle‐life .…”

Section: Introductionmentioning

confidence: 99%

Unveiling Mesoporous Graphitic Carbon Nitride as a High Performance Electrode Material for Supercapacitors

Idris

Devaraj

2018

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Synthesis of mesoporous graphitic carbon nitride (MGCN) by soft template method is still challenging and its application as an electrode material for supercapacitor remains unexplored. Herein, we introduce MGCN as an electrode material for supercapacitors. MGCN is synthesized by facile direct carbonization of methylolated surfactant-polymer composite and bulk graphitic carbon nitride (BGCN) is synthesized under similar condition but in the absence of surfactant. MGCN displays excellent capacitance properties in 1 M H 2 SO 4 electrolyte with a specific capacitance as high as 279 F g À 1 at a current density of 0.25 A g À 1 . It also exhibits good rate capability and outstanding cycling stability with excellent coulombic efficiency of 100% over 5000 cycles. This superior capacitive storage performance is attributed to the high surface area, easily accessible mesopores and high pyridinic nitrogen content. High surface area and uniform pores of MGCN provide more active sites for charge storage and reduce diffusion path length for ions while high pyridinic nitrogen enhanced the overall specific capacitance by surface Faradaic reaction.

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Section: Introductionmentioning

confidence: 99%

Unveiling Mesoporous Graphitic Carbon Nitride as a High Performance Electrode Material for Supercapacitors

Idris

Devaraj

2018

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“…In addition, it also exhibits electrochromism . Most importantly, MnCO 3 is studied extensively as an anode material in lithium‐ion batteries, and as an electroactive material in supercapacitors …”

Section: Introductionmentioning

confidence: 99%

“…The capacitance properties of MnCO 3 are studied in either slightly acidic (Na 2 SO 4 , NaClO 4 , Mg(ClO 4 ) 2 ), or alkaline (KOH) electrolytes. The specific capacitance value in the range of 100 to 300 F g −1 reported for MnCO 3 and its composites is believed to arise from both the mechanisms, i. e., adsorption/desorption of ions at the electrode/electrolyte interface resulting in the formation of electric double layer and pseudocapacitance. However, the charge compensation at the Mn sites remains unclear.…”

Section: Introductionmentioning

confidence: 99%

The Charge Storage Mechanism of MnCO₃ in Aqueous Electrolytes

et al. 2020

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Understanding the charge storage mechanism of MnCO3 is essential to improve its capacitance performance. Herein, we report the charge storage mechanism of MnCO3 in aqueous Na2SO4 and Mg(ClO4)2 electrolytes studied systematically by using ex‐situ X‐ray diffraction and X‐ray photoelectron spectroscopy. Theoretical specific capacitance of MnCO3.H2O in the potential window of 0.1 to 1.0 V is 806 F g−1, however, it delivers a specific capacitance value of only 95 and 66 F g−1 in 0.1 M Mg(ClO4)2 and 0.1 M Na2SO4 electrolytes, respectively, which suggests that only a limited fraction of MnCO3 is participating in the charge storage. The ex‐situ X‐ray diffraction and X‐ray photoelectron spectroscopic studies reveal that the insertion and extraction of Mg2+‐ions into/from MnCO3 accompanied by redox reaction between Mn2+ and Mn1+ during charge/discharge are reversible and do not result in phase transformation in aqueous 0.1 M Mg(ClO4)2 electrolyte. In contrast, lattice expansion and contraction by insertion and extraction of Na+‐ions into/from MnCO3 result in a gradual transformation of MnCO3 into α‐MnO2 in aqueous 0.1 M Na2SO4 electrolyte.

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“…In addition, it also exhibits electrochromism . Besides these applications, MnCO 3 is also studied extensively as an anode material in lithium‐ion batteries and as an electroactive material in supercapacitors …”

Section: Introductionmentioning

confidence: 99%

“…[10] Besides these applications, MnCO 3 is also studied extensively as an anode material in lithium-ion batteries [11][12][13][14] and as an electroactive material in supercapacitors. [15][16][17][18][19][20][21][22][23][24] In general, manganese carbonate is prepared by chemical methods for aforementioned applications. For energy storage applications, electrodes are prepared by casting the slurry, which consists of chemically synthesized manganese carbonate, a conductive additive, and a binder onto a foil or mesh.…”

Section: Introductionmentioning

confidence: 99%

Electrodeposited MnCO₃ as a High Performance Electrode Material for Supercapacitor

et al. 2018

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MnCO3 as an electrode material for supercapacitor is slowly gaining momentum. So far, wet chemical methods have been used to synthesize MnCO3 for supercapacitor applications. The electrode fabrication of thus prepared MnCO3 requires a certain percentage of conductive additive and binder; both of them do not contribute significantly to the measured capacitance. Herein, we report electrodeposition of MnCO3 and its capacitance properties. MnCO3 has been electrodeposited from an aqueous mixture of MnSO4 and Na3C6H5O7 by chronopotentiometry. X‐ray diffraction and Raman spectroscopic studies confirm the formation of MnCO3. Microscopic studies reveal the formation of micron‐sized spherical particles by the agglomeration of sub‐micron sized cubes. Electrodeposited MnCO3 delivers a specific capacitance of 194 F g−1 at a specific current of 0.5 A g−1 and demonstrates good rate capability. Further, it also exhibits high cycling stability over 10,000 cycles with retention of 92% of its initial specific capacitance value and 100% coulombic efficiency.

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Enhancement in the supercapacitive storage performance of MnCO3 using SiOx nanofluid-based electrolyte

Cited by 9 publications

References 23 publications

Unveiling Mesoporous Graphitic Carbon Nitride as a High Performance Electrode Material for Supercapacitors

Unveiling Mesoporous Graphitic Carbon Nitride as a High Performance Electrode Material for Supercapacitors

The Charge Storage Mechanism of MnCO₃ in Aqueous Electrolytes

Electrodeposited MnCO₃ as a High Performance Electrode Material for Supercapacitor

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Enhancement in the supercapacitive storage performance of MnCO3 using SiOx nanofluid-based electrolyte

Cited by 9 publications

References 23 publications

Unveiling Mesoporous Graphitic Carbon Nitride as a High Performance Electrode Material for Supercapacitors

Unveiling Mesoporous Graphitic Carbon Nitride as a High Performance Electrode Material for Supercapacitors

The Charge Storage Mechanism of MnCO3 in Aqueous Electrolytes

Electrodeposited MnCO3 as a High Performance Electrode Material for Supercapacitor

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The Charge Storage Mechanism of MnCO₃ in Aqueous Electrolytes

Electrodeposited MnCO₃ as a High Performance Electrode Material for Supercapacitor