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Synthesis and Electrochemical Characterizations of Zinc-doped LiFePO4/C by Carbothermal Reduction
Hua Ning; Wang Chen-Yun; Kang Xue-Ya; Tuerdi; Han Ying; Kang, XY
2010
Source PublicationJOURNAL OF INORGANIC MATERIALS
ISSN1000-324X
Volume25Issue:8Pages:887-892
Abstract

Alien atom doping has been adopted to modify the electrochemical performance of olivine type LiFePO4 for cathode material. Here, we report that zinc-doping can improve the performance of LiFePO4/C immensely by a simple method. LiFePO4/C and Zn-doped LiFePO4/C cathode materials were firstly synthesized by carbothermal reduction method. Physical-chemical characterizations were done by X-ray diffraction, scanning electron microscope and transmittance electron microscope. Electrochemical behavior of the cathode materials were analyzed by using cyclic voltammetry, and galvanostatic measurements were employed to characterize the reaction of lithium ion insertion and de-insertion. ICP and XRD analyses indicate that Zn ions were sufficiently doped in LiFePO4 and did not alter its crystal structure. During de-intercalation and intercalation process of lithium ions, the doped zinc atoms protect the LiFePO4 crystal from shrink. Consequently, the conductivity is enhanced after doping. It is noted that zinc ions doping can improve performance of LiFePO4, especially on the aspect of stable cycle-life at higher C rate.

KeywordLifepo4 Doping Zinc Lithium Ion Battery Cycle Performance
Subject AreaMaterials Science
DOI10.3724/SP.J.1077.2010.10105
Indexed BySCI
WOS IDWOS:000282117400020
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.xjipc.cas.cn/handle/365002/1856
Collection材料物理与化学研究室
Corresponding AuthorKang, XY
AffiliationChinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Urumqi 830011, Peoples R China;Chinese Acad Sci, Grad Univ, Beijing 100049, Peoples R China;Xinjiang Key Lab Elect Informat Mat & Devices, Urumqi 830011, Peoples R China
Recommended Citation
GB/T 7714
Hua Ning,Wang Chen-Yun,Kang Xue-Ya,et al. Synthesis and Electrochemical Characterizations of Zinc-doped LiFePO4/C by Carbothermal Reduction[J]. JOURNAL OF INORGANIC MATERIALS,2010,25(8):887-892.
APA Hua Ning,Wang Chen-Yun,Kang Xue-Ya,Tuerdi,Han Ying,&Kang, XY.(2010).Synthesis and Electrochemical Characterizations of Zinc-doped LiFePO4/C by Carbothermal Reduction.JOURNAL OF INORGANIC MATERIALS,25(8),887-892.
MLA Hua Ning,et al."Synthesis and Electrochemical Characterizations of Zinc-doped LiFePO4/C by Carbothermal Reduction".JOURNAL OF INORGANIC MATERIALS 25.8(2010):887-892.
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