| 两步法制备镍掺杂磷酸铁锂/石墨烯复合材料 |
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| 引用本文： | 舒叶,刘锐,张胤,马晓华.两步法制备镍掺杂磷酸铁锂/石墨烯复合材料[J].电池,2011,41(6):301-303. |
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| 作者姓名： | 舒叶 刘锐 张胤 马晓华 |
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| 作者单位： | 复旦大学材料科学系,上海,200433 |
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| 摘 要： | 用两步法制备掺杂Ni的磷酸铁锂(LiFePO4)/石墨烯复合材料。XRD、SEM和TEM等方法对产物的分析表明:橄榄石型LiFe0.95Ni0.05PO4颗粒的粒径为200~800 nm。循环伏安和恒流充放电测试结果表明:以0.1C和5.0C的电流在2.5~4.2 V充电,制备的LiFe0.95Ni0.05PO4/石墨烯复合材料的首次放电比容量分别为147.2 mAh/g和89.5 mAh/g,循环20次,放电容量均无明显的衰减。
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| 关 键 词： | 磷酸铁锂(LiFePO4) 复合改性 石墨烯 掺杂 |
Preparation of Ni-doped LiFePO4/graphene composite via two-step method |
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| SHU Ye,LIU Rui,ZHANG Yin,MA Xiao-hua.Preparation of Ni-doped LiFePO4/graphene composite via two-step method[J].Battery Bimonthly,2011,41(6):301-303. |
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| Authors: | SHU Ye LIU Rui ZHANG Yin MA Xiao-hua |
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| Affiliation: | (Department of Materials Science,Fudan University,Shanghai 200433,China) |
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| Abstract: | Ni doped lithium iron phosphate(LiFePO4)/graphene composite was prepared via two-step method.The analyses of XRD,SEM and TEM methods to the product showed the particle size of olivine-type LiFe0.95Ni0.05PO4 was 200~800 nm.The results of cyclic voltammetry and galvanostatic charge-discharge tests showed that when charged-discharged in 2.5~4.2 V with the current of 0.1 C and 5.0 C,the initial specific discharge capacity of prepared LiFe0.95Ni0.05PO4/graphene composite was 147.2 mAh/g and 89.5 mAh/g,respectively,there were no obvious discharge capacity fading after 20 cycles. |
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| Keywords: | lithium iron phosphate(LiFePO4) composite modification graphene doping |
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