Characteristics of lithium iron phosphate mixed with nano-sized acetylene black for rechargeable lithium-ion batteries
Characteristics of lithium iron phosphate mixed with nano-sized acetylene black for rechargeable lithium-ion batteries
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DOI：
10.1007/s10800-010-0213-8
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发表时间：
2011
影响因子：
2.9
通讯作者：
Guo-Jing Sun;B. Jin;Guang-ping Sun;E. Jin;H. Gu;Q. Jiang
中科院分区：
文献类型：
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作者：
Guo-Jing Sun;B. Jin;Guang-ping Sun;E. Jin;H. Gu;Q. Jiang
采用水热法和高能球磨法合成了掺杂纳米乙炔黑的磷酸铁锂（LiFePO 4-AB）。添加不同含量的AB以提高LiFePO 4的电子电导率。采用X射线衍射（XRD）、拉曼光谱、扫描电子显微镜和高分辨透射电子显微镜对LiFePO 4-AB的结构和形貌进行了研究。在充氩手套箱中制备了LiFePO 4-AB/Li电池，通过循环伏安和充放电测试分析了电池的电化学性能。XRD结果表明LiFePO 4-AB具有正交晶系的橄榄石型结构。AB含量为10 wt%的LiFePO 4-AB/Li电池表现出最佳的高倍率放电性能，室温下1 C和10 C下的放电容量分别为116 mAh g− 1和85 mAh g− 1。
Lithium iron phosphate mixed with nano-sized acetylene black (LiFePO4-AB) was synthesized by a hydrothermal method and subsequent high-energy ball-milling process. Different contents of AB were added to improve the electronic conductivity of LiFePO4. The structural and morphological performance of LiFePO4-AB was investigated by X-ray diffraction (XRD), Raman spectroscopy, scanning electron microscope, and high-resolution transmission electron microscope. LiFePO4-AB/Li batteries were fabricated in an argon-filled glove box, and their electrochemical performance was analyzed by cyclic voltammetry and charge/discharge tests. The XRD results demonstrate that LiFePO4-AB has an olivine-type structure indexed to the orthorhombicPnmaspace group. LiFePO4-AB/Li battery with 10 wt% AB shows the best high-rate discharge properties with the discharge capacities of 116 mAh g−1at 1 C and 85 mAh g−1at 10 C at room temperature.