Microwave solvothermal synthesis of mixed pine tree seed-like/disc-shaped microstructures of MnOx (x = 4/3 and 1) with high specific capacitance for electrochemical capacitors

Jedsada Sodtipinta, Hyun Kyung Kim, Suk Woo Lee, Siwaporn Meejoo Smith, Pasit Pakawatpanurut, Kwang Bum Kim

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

The mixed pine tree seed-like/disc-shaped microstructures of MnOx (x = 4/3 and 1) were synthesized using a simple microwave-assisted solvothermal synthesis and heat treatment under N2 atmosphere (heating rate 5 °C/min), without the need for carbon composite. This new mixed morphology showed high specific capacitance, as measured by the cyclic voltammetry (182 F g−1 at 1 mV s−1) and by the constant galvanostatic charge-discharge cycling (195 F g−1 at 0.1 A g−1). During the cycling process the specific capacitance of the material increased, which was caused by the partial electrochemical oxidation of the major phase Mn3O4 (x = 4/3) to MnO2 in a neutral electrolyte of 1 M Na2SO4. According to the galvanostatic charge-discharge cycling tests at 1 A g−1, this material also showed good capacitance retention for over 1000 cycles. MnOx synthesized herein can thus be a good candidate for the electrode material for electrochemical capacitors.

Original languageEnglish
Pages (from-to)111-119
Number of pages9
JournalJournal of Electroceramics
Volume35
Issue number1-4
DOIs
Publication statusPublished - 2015 Dec 1

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electrochemical capacitors
Seed
seeds
Capacitors
Capacitance
capacitance
Microwaves
microwaves
microstructure
Microstructure
cycles
synthesis
electrochemical oxidation
Electrochemical oxidation
electrode materials
Heating rate
Electrolytes
Cyclic voltammetry
heat treatment
Carbon

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Condensed Matter Physics
  • Mechanics of Materials
  • Materials Chemistry
  • Electrical and Electronic Engineering

Cite this

Sodtipinta, Jedsada ; Kim, Hyun Kyung ; Lee, Suk Woo ; Smith, Siwaporn Meejoo ; Pakawatpanurut, Pasit ; Kim, Kwang Bum. / Microwave solvothermal synthesis of mixed pine tree seed-like/disc-shaped microstructures of MnOx (x = 4/3 and 1) with high specific capacitance for electrochemical capacitors. In: Journal of Electroceramics. 2015 ; Vol. 35, No. 1-4. pp. 111-119.
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abstract = "The mixed pine tree seed-like/disc-shaped microstructures of MnOx (x = 4/3 and 1) were synthesized using a simple microwave-assisted solvothermal synthesis and heat treatment under N2 atmosphere (heating rate 5 °C/min), without the need for carbon composite. This new mixed morphology showed high specific capacitance, as measured by the cyclic voltammetry (182 F g−1 at 1 mV s−1) and by the constant galvanostatic charge-discharge cycling (195 F g−1 at 0.1 A g−1). During the cycling process the specific capacitance of the material increased, which was caused by the partial electrochemical oxidation of the major phase Mn3O4 (x = 4/3) to MnO2 in a neutral electrolyte of 1 M Na2SO4. According to the galvanostatic charge-discharge cycling tests at 1 A g−1, this material also showed good capacitance retention for over 1000 cycles. MnOx synthesized herein can thus be a good candidate for the electrode material for electrochemical capacitors.",
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Microwave solvothermal synthesis of mixed pine tree seed-like/disc-shaped microstructures of MnOx (x = 4/3 and 1) with high specific capacitance for electrochemical capacitors. / Sodtipinta, Jedsada; Kim, Hyun Kyung; Lee, Suk Woo; Smith, Siwaporn Meejoo; Pakawatpanurut, Pasit; Kim, Kwang Bum.

In: Journal of Electroceramics, Vol. 35, No. 1-4, 01.12.2015, p. 111-119.

Research output: Contribution to journalArticle

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AU - Pakawatpanurut, Pasit

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