BROWSE

Related Researcher

Author

Song, Hyun-Kon
eclat: ElectroChemistry Lab of Advanced Technology
Research Interests
  • Electrochemical analysis, electroactive materials, electrochemistry-based energy devices

ITEM VIEW & DOWNLOAD

Catalytic carbonization of an uncarbonizable precursor by transition metals in olivine cathode materials of lithium ion batteries

Cited 1 times inthomson ciCited 1 times inthomson ci
Title
Catalytic carbonization of an uncarbonizable precursor by transition metals in olivine cathode materials of lithium ion batteries
Author
Park, Han-SaemKim, Tae-HeeLee, Myeong-HeeSong, Hyun-Kon
Keywords
Adsorption ability; Carbon coating; Carbon precursors; Catalytic effects; Cathode materials; Cetyltrimethylammonium bromide; Discharge rates; Electrically conductive; Electrochemical performance; Electronic and ionic conductance; Electronic conductivity; LiFePO; LiNiPO4; Lithium-ion battery; Phospho olivine; Primary particles; Residual mass; Thermal carbonization
Issue Date
201210
Publisher
ROYAL SOC CHEMISTRY
Citation
JOURNAL OF MATERIALS CHEMISTRY, v.22, no.38, pp.20305 - 20310
Abstract
Herein, we report on catalytic effects of transition metals (Me) in phospho-olivines (LiMePO4) on carbonization of cetyltrimethylammonium bromide (CTAB). Carbon coating is the required process to enhance electronic conductivity of phospho-olivines that are used as cathode materials for lithium ion batteries. Primary particles of phospho-olivines were in situ coated with CTAB and the adsorbed carbon precursor was carbonized to provide an electrically conductive pathway. CTAB was successfully carbonized in a significant amount with Fe in phospho-olivines (LiFexMn1-xPO4 with x = 1 and 0.5) even if CTAB is thermally decomposed around 300 degrees C without any residual mass in the absence of the phospho-olivines. LiMnPO4 was the most inferior in terms of CTAB adsorption and thermal carbonization. LiNiPO4 and LiCoPO4 showed inefficient conversion of adsorbed CTAB to carbon even if their adsorption ability for CTAB is quite large. Also, the effect of the amount of carbon coating on LiFePO4 was investigated, leading to a conclusion that the carbon thickness balanced between electronic and ionic conductances results in the best electrochemical performances of lithium ion batteries specifically at high discharge rates.
URI
Go to Link
DOI
http://dx.doi.org/10.1039/c2jm33841f
ISSN
0959-9428
Appears in Collections:
ECHE_Journal Papers

find_unist can give you direct access to the published full text of this article. (UNISTARs only)

Show full item record

qr_code

  • mendeley

    citeulike

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

MENU