| 引用本文: | 顾大明,杨丹丹,李加展,王余,于晨涛.四氧化三钴-铂/石墨烯锂空气电池阴极材料[J].哈尔滨工业大学学报,2015,47(10):35.DOI:10.11918/j.issn.0367-6234.2015.10.008 |
| GU Daming,YANG Dandan,LI Jiazhan,WANG Yu,YU Chentao.Co3O4-Pt/graphene as air cathode catalyst for lithium-air battery[J].Journal of Harbin Institute of Technology,2015,47(10):35.DOI:10.11918/j.issn.0367-6234.2015.10.008 |
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| 摘要: |
| 为提高锂空气电池的比容量, 采用微波辅助乙二醇还原法将H2PtCl6·6H2O及氧化石墨还原为Pt/石墨烯,再将其与Co3O4混合均匀,得到高效Co3O4-Pt/石墨烯锂空气电池复合阴极材料,作为对比,同时制备了Co3O4-石墨、Co3O4-石墨烯等阴极材料,用其与金属锂阳极、LiPF6/EC-DMC-EMC电解液、PP/PE/PP隔膜组装锂空气电池.用X射线衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜（TEM）、X射线能量散射能谱(XEDS)、拉曼光谱（Ram）等方法对材料的微观形貌、组成及各组分在材料中的分散程度进行了表征,对电池进行恒流充放电测试,结果显示,Co3O4-Pt/石墨烯阴极材料的比容量可超过8 000 mAh/g（碳）,电池的放电平台高于2.6 V,其性能与另两种催化剂相比有较大提升.物理表征和电化学测试结果表明：催化剂的组成、制备工艺及各组分的分散度对电池的性能有重要影响. |
| 关键词: 锂空气电池 阴极材料 催化剂 比容量 石墨烯 |
| DOI：10.11918/j.issn.0367-6234.2015.10.008 |
| 分类号:TM911.4 |
| 基金项目:哈尔滨市优秀学科带头人专项资金(2012RFXXG99). |
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| Co3O4-Pt/graphene as air cathode catalyst for lithium-air battery |
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GU Daming1, YANG Dandan1, LI Jiazhan1, WANG Yu1, YU Chentao2
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(1.School of Science, Harbin Institute of Technology, 150001 Harbin, China; 2.School of Astronautics, Harbin Institute of Technology, 150001 Harbin, China)
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| Abstract: |
| It is reported that the preparation of Co3O4-Pt/graphene hybrid and its use as air cathode catalyst for enhanced specific capacity in Lithium-air battery. Co3O4-Pt/graphene was synthesized by a two-step method. More specifically, Pt/graphene was prepared by microwave-assisted polyol process, and then it was mixed with Co3O4 uniformly to get highly efficient Co3O4-Pt/graphene as air-cathode catalyst. Micromorphology, composition and compositional dispersion of the obtained hybrid catalyst were then characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (XEDS), transmission electron microscopy (TEM),Raman Spectroscopy(Ram). Co3O4-Pt/graphene air cathode catalyst was assembled with metal lithium anode, LiPF6/EC-DMC-EMC electrolyte, and PP/PE/PP to construct a lithium-air battery. The constant current charge-discharge tests of the lithium-air battery exhibit enhanced specific capacity: the discharge specific capacity reaches up to 8 000 mAh/g and the voltage is above 2.6 V, which is superior to alternative cathode catalysts. The enhanced performance of lithium-air battery is attributed to the joint effect of preparation process, composition, and compositional dispersion. |
| Key words: lithium-air battery cathode materials catalyst specific capacity graphene |
