Conventional- and microwave-hydrothermal synthesis of LiMn 2O4: Effect of synthesis on electrochemical energy storage performances

Kunfeng Chen, Ailaura C. Donahoe, Young Dong Noh, Keyan Li, Sridhar Komarneni, Dongfeng Xue

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22 Scopus citations

Abstract

The LiMn2O4 electrode materials were synthesized by the conventional-hydrothermal and microwave-hydrothermal methods. The electrochemical performances of LiMn2O4 were studied as supercapacitors in LiNO3 electrolyte and lithium-ion battery cathodes. The microwave-hydrothermal method can synthesize LiMn 2O4 electrode materials with reversible electrochemical reaction in a short reaction time and low reaction temperature than conventional-hydrothermal route. The capacitance of LiMn2O 4 electrode increased with increasing crystallization time in conventional-hydrothermal route. The results showed that LiMn2O 4 supercapacitors had similar discharge capacity and potential window (1.2 V) as that of ordinary lithium-ion battery cathodes. In LiNO3 aqueous electrolyte, the reaction kinetics of LiMn2O4 supercapacitors was very fast. Even, at current densities of 1 A/g and 5 A/g, aqueous electrolyte gave good capacity compared with that in organic electrolyte at a current density of 0.05 A/g.

Original languageEnglish (US)
Pages (from-to)3155-3163
Number of pages9
JournalCeramics International
Volume40
Issue number2
DOIs
StatePublished - Mar 1 2014

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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