首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Formation of ultraflne three-dimensional hierarchical birnessite-type MnO_2 nanoflowers for supercapacitor
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Formation of ultraflne three-dimensional hierarchical birnessite-type MnO_2 nanoflowers for supercapacitor

机译:超级电容器用超细颗粒三维分级水钠锰矿型MnO_2纳米花的形成

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摘要

Ultrafine (50-100 nm in diameter) birnessite-type MnO_2 nanoflowers assembled by numerous ultrathin nanosheets (3-6 nm in thickness and 30-50 nm in width) have been synthesized via a simple and scalable solution route under ambient conditions. The ratio of reactants plays a significant role in the formation of MnO_2 nanoflowers and the as-prepared MnO_2 hierarchical nanostructure exhibits excellent electrochemical performance with high specific capacitance (251.3 Fg~(-1) at 0.5 Ag~(-1)) and superior cycling stability (only 7.5% SC loss after 10,000 cycling test) and good rate capability. The unique micro-structures of MnO_2 nanoflowers are responsible for their superior electrochemical properties, and thus it may be a promising for supercapacitor application,
机译:由许多超薄纳米片(厚度为3-6 nm,宽度为30-50 nm)组装而成的超细(直径为50-100 nm)的水钠锰矿型MnO_2纳米花已经在环境条件下通过简单且可扩展的溶液路线合成。反应物的比例在MnO_2纳米花的形成中起重要作用,并且所制备的MnO_2分层纳米结构具有出色的电化学性能和高比电容(在0.5 Ag〜(-1)时为251.3 Fg〜(-1))和优异的循环性能稳定性(10,000次循环测试后仅有7.5%的SC损失)和良好的定速能力。 MnO_2纳米花的独特微观结构为其优异的电化学性能负责,因此对于超级电容器应用可能是有希望的,

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