{"title":"不同铁源对LiFePO4/C复合正极材料性能的影响","authors":"Fei Gao , Zhiyuan Tang , Jianjun Xue","doi":"10.1016/S1005-8850(08)60291-1","DOIUrl":null,"url":null,"abstract":"<div><p>Olivine LiFePO<sub>4</sub>/C composite cathode materials were synthesized by a solid state method in N<sub>2</sub> + 5vol% H<sub>2</sub> atmosphere. The effects of different iron sources, including Fe(OH)<sub>3</sub> and FeC<sub>2</sub>O<sub>4</sub>·2H<sub>2</sub>O, on the performance of as-synthesized cathode materials were investigated and the causes were also analyzed. The crystal structure, the morphology, and the electrochemical performance of the prepared samples were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), laser particle-size distribution measurement, and other electrochemical techniques. The results demonstrate that the LiFePO<sub>4</sub>/C materials obtained from Fe(OH)<sub>3</sub> at 800°C and FeC<sub>2</sub>O<sub>4</sub>·2H<sub>2</sub>O at 700°C have the similar electrochemical performances. The initial discharge capacities of LiFePO<sub>4</sub>/C synthesized from Fe(OH)<sub>3</sub> and FeC<sub>2</sub>O<sub>4</sub>·2H<sub>2</sub>O are 134.5 mAh·g<sup>−1</sup> and 137.4 mAh·g<sup>−1</sup> at the C/5 rate, respectively. However, the tap density of the LiFePO<sub>4</sub>/C materials obtained from Fe(OH)<sub>3</sub> are higher, which is significant for the improvement of the capacity of the battery.</p></div>","PeriodicalId":100851,"journal":{"name":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60291-1","citationCount":"10","resultStr":"{\"title\":\"Effects of different iron sources on the performance of LiFePO4/C composite cathode materials\",\"authors\":\"Fei Gao , Zhiyuan Tang , Jianjun Xue\",\"doi\":\"10.1016/S1005-8850(08)60291-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Olivine LiFePO<sub>4</sub>/C composite cathode materials were synthesized by a solid state method in N<sub>2</sub> + 5vol% H<sub>2</sub> atmosphere. The effects of different iron sources, including Fe(OH)<sub>3</sub> and FeC<sub>2</sub>O<sub>4</sub>·2H<sub>2</sub>O, on the performance of as-synthesized cathode materials were investigated and the causes were also analyzed. The crystal structure, the morphology, and the electrochemical performance of the prepared samples were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), laser particle-size distribution measurement, and other electrochemical techniques. The results demonstrate that the LiFePO<sub>4</sub>/C materials obtained from Fe(OH)<sub>3</sub> at 800°C and FeC<sub>2</sub>O<sub>4</sub>·2H<sub>2</sub>O at 700°C have the similar electrochemical performances. The initial discharge capacities of LiFePO<sub>4</sub>/C synthesized from Fe(OH)<sub>3</sub> and FeC<sub>2</sub>O<sub>4</sub>·2H<sub>2</sub>O are 134.5 mAh·g<sup>−1</sup> and 137.4 mAh·g<sup>−1</sup> at the C/5 rate, respectively. However, the tap density of the LiFePO<sub>4</sub>/C materials obtained from Fe(OH)<sub>3</sub> are higher, which is significant for the improvement of the capacity of the battery.</p></div>\",\"PeriodicalId\":100851,\"journal\":{\"name\":\"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2008-12-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S1005-8850(08)60291-1\",\"citationCount\":\"10\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1005885008602911\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of University of Science and Technology Beijing, Mineral, Metallurgy, Material","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1005885008602911","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effects of different iron sources on the performance of LiFePO4/C composite cathode materials
Olivine LiFePO4/C composite cathode materials were synthesized by a solid state method in N2 + 5vol% H2 atmosphere. The effects of different iron sources, including Fe(OH)3 and FeC2O4·2H2O, on the performance of as-synthesized cathode materials were investigated and the causes were also analyzed. The crystal structure, the morphology, and the electrochemical performance of the prepared samples were characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), laser particle-size distribution measurement, and other electrochemical techniques. The results demonstrate that the LiFePO4/C materials obtained from Fe(OH)3 at 800°C and FeC2O4·2H2O at 700°C have the similar electrochemical performances. The initial discharge capacities of LiFePO4/C synthesized from Fe(OH)3 and FeC2O4·2H2O are 134.5 mAh·g−1 and 137.4 mAh·g−1 at the C/5 rate, respectively. However, the tap density of the LiFePO4/C materials obtained from Fe(OH)3 are higher, which is significant for the improvement of the capacity of the battery.
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