| LiFePO4充/放电过程界面性能研究 |
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| 引用本文： | 白咏梅,陈晗,韩绍昌.LiFePO4充/放电过程界面性能研究[J].电池工业,2010,15(2):84-88. |
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| 作者姓名： | 白咏梅 陈晗 韩绍昌 |
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| 作者单位： | 湖南大学材料科学与工程学院,湖南,长沙,410082;湖南工业大学冶金学院,湖南,株洲,412000 |
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| 基金项目： | 国家自然科学基金，广东省教育部产学研结合项目 |
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| 摘 要： | 采用粉末X射线衍射法(XRD)和电化学阻抗谱(EIS)来研究LiFePO4充/放电过程的结构变化和界面行为。XRD测试表明,在充/放电过程中LiFePO4/FePO4处于两相共存相互转换的状态。确定了LiFePO4的脱/嵌锂过程中的等效电路,对LiFePO4不同充放电时期试样进行电化学阻抗测试,计算出了交换电流I0和锂离子扩散DLi+。并讨论随充放电过程的进行i0和DLi+的变化规律。
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| 关 键 词： | 正极材料 LiFePO4 界面 |
Investigation on the interface properties of LiFePO4 during charge and discharge process |
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| BAI Yong-mei,CHEN han,HAN Shao-chang.Investigation on the interface properties of LiFePO4 during charge and discharge process[J].Chinese Battery Industry,2010,15(2):84-88. |
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| Authors: | BAI Yong-mei CHEN han HAN Shao-chang |
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| Affiliation: | BAI Yong-mei1,CHEN han2,HAN Shao-chang1(1.College of Materials Science and Engineering,Hunan University,Changsha,Hunan 410082,China,2.College of Metallurgy,Hunan University of Technology,Zhuzhou,Hunan 412000,China) |
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| Abstract: | The X-ray diffraction and electrochemical impedance spectrum were used to study the structural changes and interface behaviors during charge and discharge processes in LiFePO4.The XRD test results showed that the charge and discharge process was in a two-phase coexistence and conversion state between LiFePO4/FePO4.Equivalent circuit of the LiFePO4during intercalation and disintercalation was determined.The exchange current(I0) and lithium-ion diffusion coefficient(DLi+) were calculated and electrochemical i... |
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| Keywords: | LiFePO4 |
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