Preparation and Surface Activity of Single‐Crystalline NiO(111) Nanosheets with Hexagonal Holes: A Semiconductor Nanospanner

Hu, Juncheng; Zhu, Kake; Chen, Lifang; Yang, Hanxi; Li, Zhi; Suchopar, Andreas; Richards, Ryan M.

doi:10.1002/adma.200701389

Cited by 95 publications

(94 citation statements)

References 33 publications

(25 reference statements)

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“…Here, structurally well-defined NiO material was prepared using a solvothermal method aided with a pseudo-supercritical drying technique 32 . The as-prepared NiO exhibits a sheet-like structure with hexagonal holes (Fig.…”

Section: Morphology and Electronic Structure Of Nio Nanosheetsmentioning

confidence: 99%

Phase evolution for conversion reaction electrodes in lithium-ion batteries

et al. 2014

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The performance of battery materials is largely governed by structural and chemical evolutions during electrochemical reactions. Therefore, resolving spatially dependent reaction pathways could enlighten mechanistic understanding, and enable rational design for rechargeable battery materials. Here, we present a phase evolution panorama via spectroscopic and three-dimensional imaging at multiple states of charge for an anode material (that is, nickel oxide nanosheets) in lithium-ion batteries. We reconstruct the threedimensional lithiation/delithiation fronts and find that, in a fully electrolyte immersion environment, phase conversion can nucleate from spatially distant locations on the same slab of material. In addition, the architecture of a lithiated nickel oxide is a bent porous metallic framework. Furthermore, anode-electrolyte interphase is found to be dynamically evolving upon charging and discharging. The present study has implications for resolving the inhomogeneity of the general electrochemically driven phase transition (for example, intercalation reactions) and for the origin of inhomogeneous charge distribution in large-format battery electrodes.

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Section: Morphology and Electronic Structure Of Nio Nanosheetsmentioning

confidence: 99%

Phase evolution for conversion reaction electrodes in lithium-ion batteries

et al. 2014

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“…The observed rings may arise from surfactant etching at defect sites, i.e., in the center of the plate; Figure 1 b,c and Figure 2 c,d). [11][12][13][14][15] These defects may arise because the early stage of plate growth is initiated (seeded) from the center, [ 11 ] because the defect sites form unstable surfaces, [ 12 , 13 ] or because of a slight bending of the plates. [ 14 , 15 ] Nevertheless, based on our experimental results, it appears that Au rings result from etching of Au plates from the center to the outside of the plate and within areas of high surface tension (i.e., the vertices), and that this etching is closely related to the concentration of surfactant and reaction precursors.…”

Section: Doi: 101002/adma201101455mentioning

confidence: 99%

Tailored Microcrystal Growth: A Facile Solution‐Phase Synthesis of Gold Rings

et al. 2011

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“…Herein, we report, for the first time, a template-free "green" wet chemical route for the gram-scale synthesis of nanoporous spheres (about 600 nm in diameter) composed of hexagonal wurtzite ZnS crystallites on the basis of our previous work [22][23][24][25]. This wet chemical route has the following advantages: (i) for the catalyst, it can work efficiently under both visible and UV irradiation; (ii) the route is inexpensive and suitable for the gram-scale synthesis and has excellent yield (>99%), which is potentially suitable for industrial production; (iii) no extra template or capping agent is required; and (iv) ease of recovery and recyclability owing to the larger diameters of the nanoporous spheres, which is essential for their practical application.…”

Section: Introductionmentioning

confidence: 99%