Bullet-like microstructured nickel ammonium phosphate/graphene foam composite as positive electrode for asymmetric supercapacitors

Badr A. Mahmoud; Abdulmajid A. Mirghni; Oladepo Fasakin; Kabir O. Oyedotun; Ncholu Manyala

doi:10.1039/d0ra02300k

Bullet-like microstructured nickel ammonium phosphate/graphene foam composite as positive electrode for asymmetric supercapacitors

Badr A. Mahmoud
, Abdulmajid A. Mirghni
, Oladepo Fasakin
, Kabir O. Oyedotun
, Ncholu Manyala^*

^*Corresponding author for this work

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

27 Scopus citations

Abstract

Unique microstructured nickel ammonium phosphate Ni(NH₄)₂(PO₃)₄·4H₂O and Ni(NH₄)₂(PO₃)₄·4H₂O/GF composite were successfully synthesized through the hydrothermal method with different graphene foam (GF) mass loading of 30, 60 and 90 mg as a positive electrode for asymmetric supercapacitors. The crystal structure, vibrational mode, texture and morphology of the samples were studied with X-ray diffraction (XRD), Raman spectroscopy, Brunauer-Emmett-Teller (BET) surface area analysis and scanning electron microscopy (SEM). The prepared materials were tested in both 3-and 2-electrode measurements using 6 M KOH electrolyte. The composite material Ni(NH₄)₂(PO₃)₄·4H₂O/60 mg exhibited a remarkable gravimetric capacity of 52 mA h g^-1, higher than the 34 mA h g^-1obtained for the Ni(NH₄)₂(PO₃)₄·4H₂O pristine sample, both at 0.5 A g^-1. For the fabrication of the asymmetric device, activated carbon from pepper seed (ppAC) was used as a negative electrode while Ni(NH₄)₂(PO₃)₄·4H₂O/60 mg GF was adopted as the positive electrode. The Ni(NH₄)₂(PO₃)₄·4H₂O/60 mg GF//ppAC asymmetric device delivered a specific energy of 52 Wh kg^-1with an equivalent specific power of 861 W kg^-1at 1.0 A g^-1within a potential range of 0.0-1.5 V. Moreover, the asymmetric device displayed a capacity retention of about 76% for over 10?000 cycles at a high specific current of 10.0

Original language	English
Pages (from-to)	16349-16360
Number of pages	12
Journal	RSC Advances
Volume	10
Issue number	28
DOIs	https://doi.org/10.1039/d0ra02300k
State	Published - 24 Apr 2020
Externally published	Yes

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry 2020.

ASJC Scopus subject areas

General Chemistry
General Chemical Engineering

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10.1039/d0ra02300k

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@article{a20ea53adfae4fbca822df994d30de12,

title = "Bullet-like microstructured nickel ammonium phosphate/graphene foam composite as positive electrode for asymmetric supercapacitors",

abstract = "Unique microstructured nickel ammonium phosphate Ni(NH4)2(PO3)4·4H2O and Ni(NH4)2(PO3)4·4H2O/GF composite were successfully synthesized through the hydrothermal method with different graphene foam (GF) mass loading of 30, 60 and 90 mg as a positive electrode for asymmetric supercapacitors. The crystal structure, vibrational mode, texture and morphology of the samples were studied with X-ray diffraction (XRD), Raman spectroscopy, Brunauer-Emmett-Teller (BET) surface area analysis and scanning electron microscopy (SEM). The prepared materials were tested in both 3-and 2-electrode measurements using 6 M KOH electrolyte. The composite material Ni(NH4)2(PO3)4·4H2O/60 mg exhibited a remarkable gravimetric capacity of 52 mA h g-1, higher than the 34 mA h g-1obtained for the Ni(NH4)2(PO3)4·4H2O pristine sample, both at 0.5 A g-1. For the fabrication of the asymmetric device, activated carbon from pepper seed (ppAC) was used as a negative electrode while Ni(NH4)2(PO3)4·4H2O/60 mg GF was adopted as the positive electrode. The Ni(NH4)2(PO3)4·4H2O/60 mg GF//ppAC asymmetric device delivered a specific energy of 52 Wh kg-1with an equivalent specific power of 861 W kg-1at 1.0 A g-1within a potential range of 0.0-1.5 V. Moreover, the asymmetric device displayed a capacity retention of about 76\% for over 10?000 cycles at a high specific current of 10.0",

author = "Mahmoud, \{Badr A.\} and Mirghni, \{Abdulmajid A.\} and Oladepo Fasakin and Oyedotun, \{Kabir O.\} and Ncholu Manyala",

note = "Publisher Copyright: {\textcopyright} The Royal Society of Chemistry 2020.",

year = "2020",

month = apr,

day = "24",

doi = "10.1039/d0ra02300k",

language = "English",

volume = "10",

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journal = "RSC Advances",

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T1 - Bullet-like microstructured nickel ammonium phosphate/graphene foam composite as positive electrode for asymmetric supercapacitors

AU - Mahmoud, Badr A.

AU - Mirghni, Abdulmajid A.

AU - Fasakin, Oladepo

AU - Oyedotun, Kabir O.

AU - Manyala, Ncholu

PY - 2020/4/24

Y1 - 2020/4/24

N2 - Unique microstructured nickel ammonium phosphate Ni(NH4)2(PO3)4·4H2O and Ni(NH4)2(PO3)4·4H2O/GF composite were successfully synthesized through the hydrothermal method with different graphene foam (GF) mass loading of 30, 60 and 90 mg as a positive electrode for asymmetric supercapacitors. The crystal structure, vibrational mode, texture and morphology of the samples were studied with X-ray diffraction (XRD), Raman spectroscopy, Brunauer-Emmett-Teller (BET) surface area analysis and scanning electron microscopy (SEM). The prepared materials were tested in both 3-and 2-electrode measurements using 6 M KOH electrolyte. The composite material Ni(NH4)2(PO3)4·4H2O/60 mg exhibited a remarkable gravimetric capacity of 52 mA h g-1, higher than the 34 mA h g-1obtained for the Ni(NH4)2(PO3)4·4H2O pristine sample, both at 0.5 A g-1. For the fabrication of the asymmetric device, activated carbon from pepper seed (ppAC) was used as a negative electrode while Ni(NH4)2(PO3)4·4H2O/60 mg GF was adopted as the positive electrode. The Ni(NH4)2(PO3)4·4H2O/60 mg GF//ppAC asymmetric device delivered a specific energy of 52 Wh kg-1with an equivalent specific power of 861 W kg-1at 1.0 A g-1within a potential range of 0.0-1.5 V. Moreover, the asymmetric device displayed a capacity retention of about 76% for over 10?000 cycles at a high specific current of 10.0

AB - Unique microstructured nickel ammonium phosphate Ni(NH4)2(PO3)4·4H2O and Ni(NH4)2(PO3)4·4H2O/GF composite were successfully synthesized through the hydrothermal method with different graphene foam (GF) mass loading of 30, 60 and 90 mg as a positive electrode for asymmetric supercapacitors. The crystal structure, vibrational mode, texture and morphology of the samples were studied with X-ray diffraction (XRD), Raman spectroscopy, Brunauer-Emmett-Teller (BET) surface area analysis and scanning electron microscopy (SEM). The prepared materials were tested in both 3-and 2-electrode measurements using 6 M KOH electrolyte. The composite material Ni(NH4)2(PO3)4·4H2O/60 mg exhibited a remarkable gravimetric capacity of 52 mA h g-1, higher than the 34 mA h g-1obtained for the Ni(NH4)2(PO3)4·4H2O pristine sample, both at 0.5 A g-1. For the fabrication of the asymmetric device, activated carbon from pepper seed (ppAC) was used as a negative electrode while Ni(NH4)2(PO3)4·4H2O/60 mg GF was adopted as the positive electrode. The Ni(NH4)2(PO3)4·4H2O/60 mg GF//ppAC asymmetric device delivered a specific energy of 52 Wh kg-1with an equivalent specific power of 861 W kg-1at 1.0 A g-1within a potential range of 0.0-1.5 V. Moreover, the asymmetric device displayed a capacity retention of about 76% for over 10?000 cycles at a high specific current of 10.0

UR - https://www.scopus.com/pages/publications/85084190370

U2 - 10.1039/d0ra02300k

DO - 10.1039/d0ra02300k

M3 - Article

AN - SCOPUS:85084190370

SN - 2046-2069

VL - 10

SP - 16349

EP - 16360

JO - RSC Advances

JF - RSC Advances

IS - 28

ER -

Bullet-like microstructured nickel ammonium phosphate/graphene foam composite as positive electrode for asymmetric supercapacitors

Abstract

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