Characterization of lithium ion sieve derived from biogenic Mn oxide

Qianqian Yu, Emiko Morioka, Keiko Sasaki

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Biogenic birnessite (BB), a stable form of manganese in the natural environment that originates from microbial oxidation, could be use as a starting material to prepare nanocrystalline lithium manganese oxide (LMO) by solid-state reaction for Li+ recovery. In this work, the effects of calcination temperature on Li+ adsorption density were investigated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N2 adsorption-desorption isotherms, and Li+ ion sorption isotherms. An increase in calcination temperature causes a phase transformation that results in changes in crystal compositions. The formation of Li4Mn5O12 was observed at 350 C. An increase in calcination temperature from 350 to 450 C results in a decrease in the Li4Mn5O12 phase quantity, an increase in the Li2MnO3 phase quantity, and a decrease in Li+ sorption density from 4248 to 2789 mmol/kg. The sorption density of Li + is mainly affected by the Li4Mn5O 12 phase content. LMOs prepared from BB show a higher Li+ sorption density compared with acidic birnessite. Phase transformation on poorly-crystalline BB at a relatively lower calcination temperature facilitates formation of the Li4Mn5O12 phase, which is the main contributor to Li+ sorption from aqueous solution.

Original languageEnglish
Pages (from-to)122-127
Number of pages6
JournalMicroporous and Mesoporous Materials
Volume179
DOIs
Publication statusPublished - Jul 3 2013

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials

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