Special Issue Part I: 3rd International Symposium on Functional Materials (ISFM 2009); Guest Editors: Hyojun Ahn, Li Lu, Kwonkoo Cho and Hyunsoo KimNo Access

SYNTHESIS OF HIGHLY CRYSTALLINE OLIVINE-TYPE LiFePO₄ NANOPARTICLES BY SOLUTION-BASED REACTIONS

DONGHAN KIM

Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea

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JINSUB LIM

Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea

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EUNSEOK CHOI

Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea

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JIHYEON GIM

Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea

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VINOD MATHEW

Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea

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YOUNKEE PAIK

Daegu Center, Korea Basic Science Institute, Daegu 702-701, Korea

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HONGRYUN JUNG

School of Applied Chemical Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea

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WANJIN LEE

School of Applied Chemical Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea

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DOCHEON AHN

Beamline Research Division, Pohang Accelerator Laboratory, Pohang 790-784, Korea

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SEUNGMIN PAEK

Beamline Research Division, Pohang Accelerator Laboratory, Pohang 790-784, Korea

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, and

JAEKOOK KIM

Department of Material Science and Engineering, Chonnam National University, 300 Yongbongdong, Bukgu, Gwangju 500-757, Korea

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https://doi.org/10.1142/S0218625X10014053Cited by:16 (Source: Crossref)

Abstract

LiFePO₄ nanocrystals were synthesized in various polyol media without any further post-heat treatment. The LiFePO₄ samples synthesized using three different polyol media namely, diethylene glycol (DEG), triethylene glycol (TEG), and tetraethylene glycol (TTEG), exhibited plate and rod-shaped structures with average sizes of 50–500 nm. The X-ray diffraction (XRD) patterns were indexed on the basis of an olivine structure (space group: Pnma). The samples prepared in DEG, TEG, and TTEG polyol media showed reversible capacities of 123, 155, and 166 mAh/g, respectively, at current density of 0.1 mA/cm² with no capacity fading and exhibited excellent capacity retention up to the 50th cycle. In particular, the samples showed excellent performances at high rates of 30 and 60 C with high capacity retention. It is assumed that the nanometer size materials (~50 nm) possessing a highly crystalline nature may generate improved performance at high rate current densities.

Keywords:

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