Centre for Clean Energy Technology, School of Chemistry and Forensic Science, University of Technology, Sydney, Broadway, Sydney, NSW 2007, Australia.
Sci Rep. 2012;2:924. doi: 10.1038/srep00924. Epub 2012 Dec 5.
Faceted crystals with exposed highly reactive planes have attracted intensive investigations for applications such as hydrogen production, enhanced catalytic activity, and electrochemical energy storage and conversion. Herein, we report the synthesis of mesoporous NiO crystals with dominantly exposed {110} reactive facets by the thermal conversion of hexagonal Ni(OH)(2) nanoplatelets. When applied as anode materials in lithium-ion batteries, mesoporous NiO crystals exhibit a high reversible lithium storage capacity of 700 mAh g(-1) at 1 C rate in 100 cycles and an excellent cyclability. In particular, the dominantly exposed {110} reactive facets and mesoporous nanostructure of NiO crystals lead to ultrafast lithium storage, which mimics the high power delivery of supercapacitors.
具有暴露的高反应性面的面心立方晶体引起了人们的广泛关注，因为它们在制氢、增强催化活性以及电化学储能和转换等方面具有应用潜力。在此，我们通过热转化六方相 Ni(OH)(2)纳米片报告了具有高比例暴露的{110}反应面的介孔 NiO 晶体的合成。当用作锂离子电池的阳极材料时，介孔 NiO 晶体在 100 个循环中以 1 C 的倍率循环时具有高达 700 mAh g(-1)的可逆锂存储容量和优异的循环稳定性。特别是，NiO 晶体的高比例暴露的{110}反应面和介孔纳米结构使其具有超快的储锂性能，类似于超级电容器的高功率输出。
