Preparation and Properties of Ce-Zr-Mn Composite Oxide Oxygen-Storage Materials

Zhou, Yong Qiang; Yin, De Wu; Yang, Xin Yu; Ma, Jiang Hua

doi:10.4028/www.scientific.net/AMR.535-537.165

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Preparation and Properties of Ce-Zr-Mn Composite Oxide Oxygen-Storage Materials

Abstract:

The low cerium oxygen-storage materials of Ce-Zr-Mn composite oxide were prepared by co-precipitation method. The materials were characterized by XRD,BET, OSC and so on. The results show that the precursor is prepared using ammonia as the precipitant at pH=10-13, T≥20°C. The precursor is calcined to form a fresh oxygen-storage materials at 700 °C for 5h. It has single crystalline phase -the solid solution Ce _0.45 Zr0_.45-x Mn _x Y _0.1 O _1.95 ,which has the cube structure of ZrO₂ and contains Mn,Y. Phase structure in the materials is stable in the aging process.The addition of Mn in the oxygen-storage materials contributes to raise oxygen-storage performance of the materials. The materials has the better oxygen-storage performance and heat stability when Mn content in the materials is 0.03.

Info:

Periodical:

Advanced Materials Research (Volumes 535-537)

Main Theme:

Advanced Engineering Materials II

Edited by:

Chunxiang Cui, Yali Li and Zhihao Yuan

Pages:

165-168

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.535-537.165

Citation:

Y. Q. Zhou et al., "Preparation and Properties of Ce-Zr-Mn Composite Oxide Oxygen-Storage Materials", Advanced Materials Research, Vols. 535-537, pp. 165-168, 2012

Online since:

June 2012

Authors:

Yong Qiang Zhou, De Wu Yin, Xin Yu Yang, Jiang Hua Ma

Keywords:

Ce-Zr Solid Solution, Co-Precipitation Method, Mn, Oxygen-Storage Materials, Oxygen-Storage Performance

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References

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101

Electrochemical Performance of LiFePO₄/C Positive-Electrode Material Prepared via a Rheological Phase Method

Authors: Jian He Hong, Chun Fang Bai, Gang He, Ming Zhong He, Hai Feng Li, Xin Yan Sun, Yan Fen Wang

Abstract: Positive-electrode material LiFePO₄/C was prepared using FePO₄•2H₂O as raw material via a rheological phase method. Orthogonal experiment was designed to systematically investigate the effects of the ratio of raw materials, calcining temperature and holding time on the morphology and electrochemical performance of LiFePO₄/C. The results showed that the optimal parameters were as follows: synthesis temperature 650 °C, time 10 h. The sample prepared with optimal parameters showed discharge capacities of 147.5 mAh•g^-1 at 0.2 C and 133.7 mAh•g^-1 at 1 C rate, with good cycle performance.

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