Carbon-coated nanoclustered LiMn 0.71Fe 0.29PO 4 cathode for lithium-ion batteries

Minki Jo, Hochun Yoo, Yoon Seok Jung, Jaephil Cho

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Carbon-coated clustered LiMn 0.71Fe 0.29PO 4 (c-LMFP) nanoparticles are prepared from ball-milling with a mixture of ∼40 nm thick LMFP nanoplates obtained by polyol method and carbon black. The clustered nanocomposite structure of c-LMFP turns out to have advantages of improved volumetric energy density and electrochemical performance. The c-LMFP exhibits increased tap density of 0.9 g cm -3, compared with the as-prepared LMFP nanoplates (0.6 g cm -3), providing with high volumetric discharge capacity of 243 mA h cm -3 at 0.1C and 128 mA h cm -3 even at 7C at 21 °C. At elevated temperature (60 °C), the capacity retention of c-LMFP remains excellent (100% of its initial capacity (165 mA h g -1) at the same cycling condition as 21 °C). In sharp contrast, capacity of carbon-coated LiMnPO 4 (c-LMP) exhibits volumetric discharge capacity of 72 mA h cm -3 at 5C and decays rapidly at 60 °C after 40 cycles (capacity retention of 58%). The better cycling stability of c-LMFP than that of c-LMP is believed to be associated with mitigated Mn 2+ dissolution by Fe 2+ substitution.

Original languageEnglish
Pages (from-to)162-168
Number of pages7
JournalJournal of Power Sources
Volume216
DOIs
Publication statusPublished - 2012 Oct 15

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Carbon-coated nanoclustered LiMn <sub>0.71</sub>Fe <sub>0.29</sub>PO <sub>4</sub> cathode for lithium-ion batteries'. Together they form a unique fingerprint.

Cite this