Study on Synthesis and Electrochemical Properties of Rare Earth Ce-doped LiFePO_4 Cathode Material AITranslate
Abstract AITranslate
. LiFe1-xCex PO4/C （x= 0,0. 01,0. 03,0. 05） cathode material doped with rare earth Ce was syn- thesized with hydrothermal method. The electrochemical properties of the prepared material were studied by a series of systematic tests. XRD results show that the olivine crystal structure of LiFePO4 stays the same after doping 1 %- 5 % Ce, but cell volume is extended, which is favorable for the Li＋ extraction-inser- tion. The SEM images further demonstrate that doping rare earth Ce can refine the grain size,and then ef- fectively reduce Li＋ diffusion and migration pathway. In the potential range of 2. 044.0 V,the initial dis- charge specific capacity of LiFe1-xCexPO4/C at the discharge rate of 0.1C firstly increases and then decrea- ses with Ce dosage increasing,and it reaches the maximum value of 144.1 mA /g at x= 0. 03 , increased by 17.4% compared with the undoped LiFePO4/C. And its capacity retention ratio is 95.0% after 50 cy- cles. CV and EIS measurements show that LiFe1-xCexPO4/C （x=0.03） has the lowest charge transfer re- sistance,and the redox peak of the sample remains visible after 50 cycles at the charge and discharge rate of 0.1C,demonstrating that the sample has stable structure and good reversible reaction performance.
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Basic Information:
DOI：
Chinese Library Classification Number:TM912.9[电气工程—电力电子与电力传动]
Citation Information:
. LiFe1-xCex PO4/C （x= 0,0. 01,0. 03,0. 05） cathode material doped with rare earth Ce was syn- thesized with hydrothermal method. The electrochemical properties of the prepared material were studied by a series of systematic tests. XRD results show that the olivine crystal structure of LiFePO4 stays the same after doping 1 %- 5 % Ce, but cell volume is extended, which is favorable for the Li＋ extraction-inser- tion. The SEM images further demonstrate that doping rare earth Ce can refine the grain size,and then ef- fectively reduce Li＋ diffusion and migration pathway. In the potential range of 2. 044.0 V,the initial dis- charge specific capacity of LiFe1-xCexPO4/C at the discharge rate of 0.1C firstly increases and then decrea- ses with Ce dosage increasing,and it reaches the maximum value of 144.1 mA /g at x= 0. 03 , increased by 17.4% compared with the undoped LiFePO4/C. And its capacity retention ratio is 95.0% after 50 cy- cles. CV and EIS measurements show that LiFe1-xCexPO4/C （x=0.03） has the lowest charge transfer re- sistance,and the redox peak of the sample remains visible after 50 cycles at the charge and discharge rate of 0.1C,demonstrating that the sample has stable structure and good reversible reaction performance.
quote
| GB/T 7714-2015 | [1] ZHANG Yang, WANG Juan, WANG Liang-liang, et al. Study on Synthesis and Electrochemical Properties of Rare Earth Ce-doped LiFePO_4 Cathode Material[J]. Rare Metals and Cemented Carbides, 2017(4): 42-46. |
| MLA | [1] ZHANG Yang, et al., "Study on Synthesis and Electrochemical Properties of Rare Earth Ce-doped LiFePO_4 Cathode Material." Rare Metals and Cemented Carbides, no. 4, 2017, pp. 42-46. |
| APA | [1] ZHANG Yang, WANG Juan, WANG Liang-liang, & XU Yun-hua. (2017). Study on Synthesis and Electrochemical Properties of Rare Earth Ce-doped LiFePO_4 Cathode Material. Rare Metals and Cemented Carbides(4), 42-46. |
| IEEE | [1] ZHANG Yang, WANG Juan, WANG Liang-liang, and XU Yun-hua, "Study on Synthesis and Electrochemical Properties of Rare Earth Ce-doped LiFePO_4 Cathode Material," Rare Metals and Cemented Carbides, no. 4, pp. 42-46, 2017. keywords: {lithium-ion battery;cathode material;LiFePO4;Ce;rare earth doping;electrochemical property} |