Hydrothermal synthesis of Li2MnSiO4: Mechanism and influence of precursor concentration on electrochemical properties

Jintae Hwang, Sungbin Park, Changkyoo Park, Wonil Cho, Ho Jang

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

The effect of the precursor concentration on the electrochemical properties of hydrothermally synthesized Li2MnSiO4 is investigated. The synthesis mechanism is investigated by analyzing the chemical reaction as a function of reaction time. Results show that Li2MnSiO4 is synthesized by a dissolution-recrystallization mechanism through an intermediate Mn(OH)2 phase. Smaller particles produced from higher concentration precursor solution. Li2MnSiO4 with smaller particle size shows larger initial discharge capacity than that of Li2MnSiO 4 with larger particle size which are synthesized from lower concentration precursor solution. A maximum initial charge capacity of 323 mAh g-1 and discharge capacity of 177 mAh g-1 are achieved through hydrothermal synthesis using a 2.1 M solution, while it shows serious capacity fading. Li2MnSiO4 synthesized from 2.1 M solution shows 32% of capacity retention after 20 cycles. Smaller particle size of Li2MnSiO4 can induce more serious side reaction with electrolyte due to its larger specific surface area, which results in structural instability during charge-discharge tests.

Original languageEnglish
Pages (from-to)855-860
Number of pages6
JournalMetals and Materials International
Volume19
Issue number4
DOIs
Publication statusPublished - 2013 Jul 1

Fingerprint

Hydrothermal synthesis
Electrochemical properties
Particle size
synthesis
Specific surface area
Electrolytes
Chemical reactions
fading
Dissolution
reaction time
Crystallization
low concentrations
chemical reactions
dissolving
electrolytes
cycles

Keywords

  • coating
  • crystal growth
  • electrochemistry
  • energy storage materials
  • X-ray diffraction

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Metals and Alloys
  • Mechanics of Materials
  • Materials Chemistry

Cite this

Hydrothermal synthesis of Li2MnSiO4 : Mechanism and influence of precursor concentration on electrochemical properties. / Hwang, Jintae; Park, Sungbin; Park, Changkyoo; Cho, Wonil; Jang, Ho.

In: Metals and Materials International, Vol. 19, No. 4, 01.07.2013, p. 855-860.

Research output: Contribution to journalArticle

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