Physical and electrochemical properties of LiMnPO4/C composite cathode prepared with different conductive carbons

Zhumabay Bakenov, Izumi Taniguchi

Research output: Contribution to journalArticle

133 Citations (Scopus)

Abstract

The olivine structured LiMnPO4/C composites were prepared by a combination of spray pyrolysis and wet ballmilling using different conductive carbons: acetylene black and two types of ketjen black. The ketjen black with a larger specific surface area and dibutyl phthalate absorption number was found to be more preferable compared with other conductive carbons studied in this work. The LiMnPO4/C composite cathode with ketjen black, which has the largest specific surface area, exhibited the largest discharge capacity compared with other LiMnPO4/C composites. The largest discharge capacity delivered by this composite cathode was 166 mAh g-1 at 0.05 C, which is about 97% of the theoretical value for LiMnPO4. The performance improvement by using this conductive carbon was attributed to its extremely large specific surface area and high ability to absorb the electrolyte, which provide enhanced charge transfer and lithium ion transport in the composite cathode structure.

Original languageEnglish
Pages (from-to)7445-7451
Number of pages7
JournalJournal of Power Sources
Volume195
Issue number21
DOIs
Publication statusPublished - Nov 1 2010
Externally publishedYes

Fingerprint

Electrochemical properties
Cathodes
Carbon
Physical properties
physical properties
cathodes
composite materials
Specific surface area
carbon
Composite materials
Dibutyl Phthalate
Acetylene
Olivine
phthalates
Spray pyrolysis
Lithium
olivine
acetylene
Electrolytes
pyrolysis

Keywords

  • Conductive carbon
  • LiMnPO/C composites
  • Spray pyrolysis
  • Wet ballmilling

ASJC Scopus subject areas

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

Cite this

Physical and electrochemical properties of LiMnPO4/C composite cathode prepared with different conductive carbons. / Bakenov, Zhumabay; Taniguchi, Izumi.

In: Journal of Power Sources, Vol. 195, No. 21, 01.11.2010, p. 7445-7451.

Research output: Contribution to journalArticle

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AB - The olivine structured LiMnPO4/C composites were prepared by a combination of spray pyrolysis and wet ballmilling using different conductive carbons: acetylene black and two types of ketjen black. The ketjen black with a larger specific surface area and dibutyl phthalate absorption number was found to be more preferable compared with other conductive carbons studied in this work. The LiMnPO4/C composite cathode with ketjen black, which has the largest specific surface area, exhibited the largest discharge capacity compared with other LiMnPO4/C composites. The largest discharge capacity delivered by this composite cathode was 166 mAh g-1 at 0.05 C, which is about 97% of the theoretical value for LiMnPO4. The performance improvement by using this conductive carbon was attributed to its extremely large specific surface area and high ability to absorb the electrolyte, which provide enhanced charge transfer and lithium ion transport in the composite cathode structure.

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