Hydrothermal synthesis of manganese phosphate/graphene foam composite for electrochemical supercapacitor applications

Abdulmajid Abdallah Mirghni; Moshawe Jack Madito; Tshifhiwa Moureen Masikhwa; Kabir O. Oyedotun; Abdulhakeem Bello; Ncholu Manyala

doi:10.1016/j.jcis.2017.01.098

Hydrothermal synthesis of manganese phosphate/graphene foam composite for electrochemical supercapacitor applications

Abdulmajid Abdallah Mirghni
, Moshawe Jack Madito
, Tshifhiwa Moureen Masikhwa
, Kabir O. Oyedotun
, Abdulhakeem Bello
, Ncholu Manyala^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

166 Scopus citations

Abstract

Manganese phosphate (Mn₃(PO₄)₂ hexagonal micro-rods and (Mn₃(PO₄)₂ with different graphene foam (GF) mass loading up to 150 mg were prepared by facile hydrothermal method. The characterization of the as-prepared samples proved the successful synthesis of Mn₃(PO₄)₂ hexagonal micro-rods and Mn₃(PO₄)₂/GF composites. It was observed that the specific capacitance of Mn₃(PO₄)₂/GF composites with different GF mass loading increases with mass loading up to 100 mg, and then decreases with increasing mass loading up to 150 mg. The specific capacitance of Mn₃(PO₄)₂/100 mg GF electrode was calculated to be 270 F g⁻¹ as compared to 41 F g⁻¹ of the pristine sample at a current density of 0.5 A g⁻¹ in a three-electrode cell configuration using 6 M KOH. Furthermore, the electrochemical performance of the Mn₃(PO₄)₂/100 mg GF electrode was evaluated in a two-electrode asymmetric cell device where Mn₃(PO₄)₂/100 mg GF electrode was used as a positive electrode and activated carbon (AC) from coconut shell as a negative electrode. AC//Mn₃(PO₄)₂/100 mg GF asymmetric cell device was tested within the potential window of 0.0–1.4 V, and showed excellent cycling stability with 96% capacitance retention over 10,000 galvanostatic charge-discharge cycles at a current density of 2 A g⁻¹.

Original language	English
Pages (from-to)	325-337
Number of pages	13
Journal	Journal of Colloid and Interface Science
Volume	494
DOIs	https://doi.org/10.1016/j.jcis.2017.01.098
State	Published - 15 May 2017
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2017 Elsevier Inc.

Keywords

Activated carbon
Asymmetric supercapacitor
Energy storage
Graphene foam
Hydrothermal method
Manganese phosphate

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Biomaterials
Surfaces, Coatings and Films
Colloid and Surface Chemistry

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10.1016/j.jcis.2017.01.098

Cite this

@article{255d85243f8b4926871d44d7f60713de,

title = "Hydrothermal synthesis of manganese phosphate/graphene foam composite for electrochemical supercapacitor applications",

abstract = "Manganese phosphate (Mn3(PO4)2 hexagonal micro-rods and (Mn3(PO4)2 with different graphene foam (GF) mass loading up to 150 mg were prepared by facile hydrothermal method. The characterization of the as-prepared samples proved the successful synthesis of Mn3(PO4)2 hexagonal micro-rods and Mn3(PO4)2/GF composites. It was observed that the specific capacitance of Mn3(PO4)2/GF composites with different GF mass loading increases with mass loading up to 100 mg, and then decreases with increasing mass loading up to 150 mg. The specific capacitance of Mn3(PO4)2/100 mg GF electrode was calculated to be 270 F g−1 as compared to 41 F g−1 of the pristine sample at a current density of 0.5 A g−1 in a three-electrode cell configuration using 6 M KOH. Furthermore, the electrochemical performance of the Mn3(PO4)2/100 mg GF electrode was evaluated in a two-electrode asymmetric cell device where Mn3(PO4)2/100 mg GF electrode was used as a positive electrode and activated carbon (AC) from coconut shell as a negative electrode. AC//Mn3(PO4)2/100 mg GF asymmetric cell device was tested within the potential window of 0.0{\textendash}1.4 V, and showed excellent cycling stability with 96\% capacitance retention over 10,000 galvanostatic charge-discharge cycles at a current density of 2 A g−1.",

keywords = "Activated carbon, Asymmetric supercapacitor, Energy storage, Graphene foam, Hydrothermal method, Manganese phosphate",

author = "Mirghni, \{Abdulmajid Abdallah\} and Madito, \{Moshawe Jack\} and Masikhwa, \{Tshifhiwa Moureen\} and Oyedotun, \{Kabir O.\} and Abdulhakeem Bello and Ncholu Manyala",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Inc.",

year = "2017",

month = may,

day = "15",

doi = "10.1016/j.jcis.2017.01.098",

language = "English",

volume = "494",

pages = "325--337",

journal = "Journal of Colloid and Interface Science",

issn = "0021-9797",

publisher = "Academic Press Inc.",

}

TY - JOUR

T1 - Hydrothermal synthesis of manganese phosphate/graphene foam composite for electrochemical supercapacitor applications

AU - Mirghni, Abdulmajid Abdallah

AU - Madito, Moshawe Jack

AU - Masikhwa, Tshifhiwa Moureen

AU - Oyedotun, Kabir O.

AU - Bello, Abdulhakeem

AU - Manyala, Ncholu

PY - 2017/5/15

Y1 - 2017/5/15

N2 - Manganese phosphate (Mn3(PO4)2 hexagonal micro-rods and (Mn3(PO4)2 with different graphene foam (GF) mass loading up to 150 mg were prepared by facile hydrothermal method. The characterization of the as-prepared samples proved the successful synthesis of Mn3(PO4)2 hexagonal micro-rods and Mn3(PO4)2/GF composites. It was observed that the specific capacitance of Mn3(PO4)2/GF composites with different GF mass loading increases with mass loading up to 100 mg, and then decreases with increasing mass loading up to 150 mg. The specific capacitance of Mn3(PO4)2/100 mg GF electrode was calculated to be 270 F g−1 as compared to 41 F g−1 of the pristine sample at a current density of 0.5 A g−1 in a three-electrode cell configuration using 6 M KOH. Furthermore, the electrochemical performance of the Mn3(PO4)2/100 mg GF electrode was evaluated in a two-electrode asymmetric cell device where Mn3(PO4)2/100 mg GF electrode was used as a positive electrode and activated carbon (AC) from coconut shell as a negative electrode. AC//Mn3(PO4)2/100 mg GF asymmetric cell device was tested within the potential window of 0.0–1.4 V, and showed excellent cycling stability with 96% capacitance retention over 10,000 galvanostatic charge-discharge cycles at a current density of 2 A g−1.

AB - Manganese phosphate (Mn3(PO4)2 hexagonal micro-rods and (Mn3(PO4)2 with different graphene foam (GF) mass loading up to 150 mg were prepared by facile hydrothermal method. The characterization of the as-prepared samples proved the successful synthesis of Mn3(PO4)2 hexagonal micro-rods and Mn3(PO4)2/GF composites. It was observed that the specific capacitance of Mn3(PO4)2/GF composites with different GF mass loading increases with mass loading up to 100 mg, and then decreases with increasing mass loading up to 150 mg. The specific capacitance of Mn3(PO4)2/100 mg GF electrode was calculated to be 270 F g−1 as compared to 41 F g−1 of the pristine sample at a current density of 0.5 A g−1 in a three-electrode cell configuration using 6 M KOH. Furthermore, the electrochemical performance of the Mn3(PO4)2/100 mg GF electrode was evaluated in a two-electrode asymmetric cell device where Mn3(PO4)2/100 mg GF electrode was used as a positive electrode and activated carbon (AC) from coconut shell as a negative electrode. AC//Mn3(PO4)2/100 mg GF asymmetric cell device was tested within the potential window of 0.0–1.4 V, and showed excellent cycling stability with 96% capacitance retention over 10,000 galvanostatic charge-discharge cycles at a current density of 2 A g−1.

KW - Activated carbon

KW - Asymmetric supercapacitor

KW - Energy storage

KW - Graphene foam

KW - Hydrothermal method

KW - Manganese phosphate

UR - https://www.scopus.com/pages/publications/85012248848

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DO - 10.1016/j.jcis.2017.01.098

M3 - Article

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AN - SCOPUS:85012248848

SN - 0021-9797

VL - 494

SP - 325

EP - 337

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

ER -

Hydrothermal synthesis of manganese phosphate/graphene foam composite for electrochemical supercapacitor applications

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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