| 低结晶度NiMn2O4/还原氧化石墨烯复合材料的制备及其超级电容性能 |
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| 引用本文： | 李明伟,杨绍斌. 低结晶度NiMn2O4/还原氧化石墨烯复合材料的制备及其超级电容性能[J]. 硅酸盐学报, 2021, 0(3): 503-510 |
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| 作者姓名： | 李明伟 杨绍斌 |
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| 作者单位： | 辽宁工程技术大学材料科学与工程学院 |
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| 基金项目： | 国家自然科学基金(51274119)。 |
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| 摘 要： | 采用溶剂热法制备了NiMn2O4/还原氧化石墨烯(NiMn2O4/r GO)复合材料,并对表面形貌、微观结构和电化学性能进行了表征和测试。结果表明:低结晶度的NiMn2O4以丝绒状均匀地沉积在rGO纳米片上,几乎没有rGO裸露在外,NiMn2O4纳米颗粒间的聚集现象消失;同时NiMn2O4的覆盖也有效地阻止了石墨烯层之间的团聚。由于其独特的结构,NiMn2O4/r GO具有较大的比表面积和良好的导电性。在1 A·g–1时的比电容是1 675 F·g–1。在5 A·g–1时,经过2 000个充放电循环后,NiMn2O4/r GO的比电容保持率为91%。
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| 关 键 词： | 锰酸钴 还原氧化石墨烯 超级电容器 复合材料 |
Preparation of Low Crystallinity NiMn2O4/reduced Graphene Oxide Composite and Its Supercapacitor Properties |
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| LI Mingwei,YANG Shaobin. Preparation of Low Crystallinity NiMn2O4/reduced Graphene Oxide Composite and Its Supercapacitor Properties[J]. Journal of The Chinese Ceramic Society, 2021, 0(3): 503-510 |
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| Authors: | LI Mingwei YANG Shaobin |
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| Affiliation: | (College of Materials Science and Engineering,Liaoning Technical University,Fuxin 123000,Liaoning,China) |
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| Abstract: | A composite with low crystallinity nickel manganate(NiMn2O4) on reduced graphene oxide(rGO) was synthesized by a solvothermal method. Velvet-like NiMn2O4 was deposited evenly on rGO nanosheets. The coverage of NiMn2O4 effectively prevents agglomeration between graphene flakes. The NiMn2O4/rGO composite has a large specific surface area and an excellent electrical conductivity due to the unique structure, and the specific capacitance is 1 675 F·g–1 at 1 A·g–1. The specific capacitance retention rate of NiMn2O4/rGO nanoflowers composite is 91% at 5 A·g–1 after 2 000 cycles. |
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| Keywords: | manganese acid cobalt reduced graphene oxide supercapacitors composites |
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