Electrochemical performance studies of MnO2 nanoflowers recovered from spent battery

Gomaa A M Ali, Ling Ling Tan @ Chong, Rajan Jose, Mashitah M. Yusoff, Kwok Feng Chong

Research output: Contribution to journalArticle

24 Citations (Scopus)

Abstract

The electrochemical performance of MnO2 nanoflowers recovered from spent household zinc-carbon battery is studied by cyclic voltammetry, galvanostatic charge/discharge cycling and electrochemical impedance spectroscopy. MnO2 nanoflowers are recovered from spent zinc-carbon battery by combination of solution leaching and electrowinning techniques. In an effort to utilize recovered MnO2 nanoflowers as energy storage supercapacitor, it is crucial to understand their structure and electrochemical performance. X-ray diffraction analysis confirms the recovery of MnO2 in birnessite phase, while electron microscopy analysis shows the MnO 2 is recovered as 3D nanostructure with nanoflower morphology. The recovered MnO2 nanoflowers exhibit high specific capacitance (294 F g-1 at 10 mV s-1; 208.5 F g-1 at 0.1 A g -1) in 1 M Na2SO4 electrolyte, with stable electrochemical cycling. Electrochemical data analysis reveal the great potential of MnO2 nanoflowers recovered from spent zinc-carbon battery in the development of high performance energy storage supercapacitor system.

Original languageEnglish
Pages (from-to)5-9
Number of pages5
JournalMaterials Research Bulletin
Volume60
DOIs
Publication statusPublished - 2014

Fingerprint

Nanoflowers
electric batteries
zinc
electrochemical capacitors
energy storage
carbon
electrowinning
Zinc
cycles
Carbon
leaching
Energy storage
electron microscopy
capacitance
recovery
electrolytes
impedance
Electrowinning
Electrochemical impedance spectroscopy
diffraction

Keywords

  • Electrochemical properties
  • Energy storage
  • Nanostructures
  • Oxides

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

Cite this

Electrochemical performance studies of MnO2 nanoflowers recovered from spent battery. / Ali, Gomaa A M; Tan @ Chong, Ling Ling; Jose, Rajan; Yusoff, Mashitah M.; Chong, Kwok Feng.

In: Materials Research Bulletin, Vol. 60, 2014, p. 5-9.

Research output: Contribution to journalArticle

Ali, Gomaa A M ; Tan @ Chong, Ling Ling ; Jose, Rajan ; Yusoff, Mashitah M. ; Chong, Kwok Feng. / Electrochemical performance studies of MnO2 nanoflowers recovered from spent battery. In: Materials Research Bulletin. 2014 ; Vol. 60. pp. 5-9.
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