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首页> 外文期刊>RSC Advances >Facile synthesis of nanocrystalline-assembled nest-like NiO hollow microspheres with superior lithium storage performance
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Facile synthesis of nanocrystalline-assembled nest-like NiO hollow microspheres with superior lithium storage performance

机译：纳米晶组装的巢状NiO空心微球的合成具有优异的锂存储性能

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Interconnected nest-like NiO hollow microspheres assembled from nanocrystallites are prepared by a facile hydrothermal method followed by annealing at 700 °C in air. It is noteworthy that the NiO hollow microspheres exhibit a very significant pseudocapacitive effect which makes a great contribution to the enhanced lithium storage performance. Benefiting from the advantages of unique nest-like nanoarchitecture and pseudocapacitive effect, the NiO hollow microspheres show high reversible capacity, superior cyclic performance, and excellent high rate capability. When used as anode materials for lithium ion batteries, the NiO hollow microspheres maintain a capacity of 650 mA h g?1 after 100 cycles at a current density of 1 A g?1. The capacity retention is 93%, which corresponds to a very small capacity decay of 0.07% per cycle. In particular, even at an ultra-high current density of 10 A g?1, the NiO electrode still delivers a stable discharge capacity of 457 mA h g?1.
机译：由纳米微晶组装而成的相互连接的巢状NiO空心微球是通过一种简便的水热方法制备的，然后在空气中于700°C退火。值得注意的是，NiO中空微球表现出非常显着的假电容效应，这对提高锂的储存性能做出了巨大贡献。得益于独特的巢状纳米结构和拟电容效应，NiO中空微球显示出高可逆容量，出色的循环性能和出色的高倍率性能。当用作锂离子电池的负极材料时，NiO中空微球经过100次循环后在1 A g ？1 的容量> ？1 。容量保持率为93％，相当于每个周期0.07％的很小的容量衰减。尤其是，即使在10 A g ？1 的超高电流密度下，NiO电极仍可提供457 mA hg ？1 。

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