Fast ultrasound-assisted synthesis of Li2MnSiO4 nanoparticles for a lithium-ion battery

Chahwan Hwang, Taejin Kim, Joongpyo Shim, Kyungwon Kwak, Kang Min Ok, Kyung Koo Lee

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Abstract High-capacity Li2MnSiO4/C (LMS/C MBS) nanoparticles have been prepared using sonochemistry under a multibubble sonoluminescence (MBS) condition, and their physical and electrochemical properties were characterized. The results show that LMS/C MBS nanoparticles exhibit a nearly pure crystalline phase with orthorhombic structure and have a spherical shape and a uniform particle size distribution centered at a diameter of 22.5 nm. Galvanostatic charge-discharge measurements reveal that LMS/C MBS delivers an initial discharge capacity of about 260 mA h g-1 at a current rate of 16.5 mA g-1 in the voltage range of 1.5-4.8 V (vs. Li/Li+), while LMS MBS (LMS without a carbon source under MBS) and LMS/C SG (LMS with a carbon source using the conventional sol-gel method) possess lower capacities of 168 and 9 mA h g-1, respectively. The improved electrochemical performance of LMS/C MBS can be ascribed to the uniform nanoparticle size, mesoporous structure, and in-situ carbon coating, which can enhance the electronic conductivity as well as the lithium ion diffusion coefficient.

Original languageEnglish
Article number21391
Pages (from-to)522-529
Number of pages8
JournalJournal of Power Sources
Volume294
DOIs
Publication statusPublished - 2015 Jul 2
Externally publishedYes

Keywords

  • Cathode active material
  • Lithium manganese silicate
  • Lithium-ion battery
  • Sol-gel process
  • Sonochemical reaction

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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