Synthesis and properties of LiMn2O4 from hydrazine hydrate reduced electrolytic manganese dioxide

Download
  1. Get@NRC: Synthesis and properties of LiMn2O4 from hydrazine hydrate reduced electrolytic manganese dioxide (Opens in a new window)
DOIResolve DOI: http://doi.org/10.1016/j.ssi.2013.02.009
AuthorSearch for: ; Search for: ; Search for: ; Search for: ; Search for: ; Search for:
TypeArticle
Journal titleSolid State Ionics
ISSN0167-2738
Volume237
Pages3439; # of pages: 6
SubjectCath-ode materials; Electrochemical impedance; Electrolytic manganese dioxides; Hydrazine hydrate; Lithium-ion battery; Lithium-ion battery cathodes; Manganese dioxide; Spinel lithium manganese oxides; Cathodes; Crystal impurities; Cyclic voltammetry; Diffusion; Electrochemical impedance spectroscopy; Hydrates; Hydration; Hydrazine; Lithium; Lithium batteries; Manganese; Scanning electron microscopy; Synthesis (chemical); X ray diffraction; Lithium alloys
AbstractUsing N2H4·H2O as reductant γ-Mn3O4 particles were obtained from the electrolytic manganese dioxide (EMD). Via high temperature solid-phase reactions, spinel lithium manganese oxide (LiMn2O4) was produced using the obtained γ-Mn3O4 as precursor mixed with LiOH×H2O for the lithium ion battery cathodes. Atomic absorption (AAS) shows that after the liquid-phase reduction reaction the impurity ions, such as Na+, K+, Ca2 +, and Mg2 +, are greatly reduced. X-ray diffraction (XRD) and scanning electron microscopy (SEM) show that γ-Mn3O4 has high crystallinity and uniform size-distribution. Spinel lithium manganese (LiMn2O4) synthesized by the γ-Mn3O 4 precursor has a high crystallinity and the (111) face grows perfectly with a regular and micron-sized octagonal crystal. The electrochemical tests show that LiMn2O4 synthesized by the γ-Mn3O4 precursor has greater discharge capacity, better cycle performance, and better high-rate capability compared with LiMn2O4 synthesized by the EMD precursor. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) indicate that LiMn2O4 synthesized by the γ-Mn3O 4 precursor has a better electrochemical reaction reversibility, greater peak current, higher lithium-ion diffusion coefficient, and lower electrochemical impedance. Furthermore, this synthesis process is simple, of low-cost, and easy for a large-scale production. © 2013 Elsevier B.V.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC)
Peer reviewedYes
NPARC number21270553
Export citationExport as RIS
Report a correctionReport a correction
Record identifiere5255ea2-2bd2-4ce0-b535-1a780f387546
Record created2014-02-17
Record modified2016-05-09
Bookmark and share
  • Share this page with Facebook (Opens in a new window)
  • Share this page with Twitter (Opens in a new window)
  • Share this page with Google+ (Opens in a new window)
  • Share this page with Delicious (Opens in a new window)
Date modified: