Surfactant-Assisted Solvothermal Synthesis of Co<sub>3</sub>O<sub>4</sub> Hollow Spheres with Oriented-Aggregation Nanostructures and Tunable Particle Size

He, Tao; Chen, Dairong; Jiao, Xiuling; Xu, Yanyan; Gu, Yuanxiang

doi:10.1021/la0488710

Cited by 202 publications

(122 citation statements)

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“…The hollow Co 3 O 4 spheres were synthesized by surfactant-assisted solvothermal decomposition of cobalt nitrate (a detailed procedure is given in the Methods) 33 , and the hollow and mesoporous sphere was verified by transmission electron microscopy (TEM) images and nitrogen adsorption-desorption isotherm measurements as shown in Supplementary Figs 1 and 2, respectively. Despite the mesoporous and hollow structure of the metal oxide spheres, the capacity fading is tremendously (Fig.…”

Section: Resultsmentioning

confidence: 99%

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High-rate lithiation-induced reactivation of mesoporous hollow spheres for long-lived lithium-ion batteries

et al. 2014

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Mechanical and chemical degradations of high-capacity anodes, resulting from lithiationinduced stress accumulation, volume expansion and pulverization, and unstable solidelectrolyte interface formation, represent major mechanisms of capacity fading, limiting the lifetime of electrodes for lithium-ion batteries. Here we report that the mechanical degradation on cycling can be deliberately controlled to finely tune mesoporous structure of the metal oxide sphere and optimize stable solid-electrolyte interface by high-rate lithiationinduced reactivation. The reactivated Co 3 O 4 hollow sphere exhibits a reversible capacity above its theoretical value (924 mAh g À 1 at 1.12 C), enhanced rate performance and a cycling stability without capacity fading after 7,000 cycles at a high rate of 5.62 C. In contrast to the conventional approach of mitigating mechanical degradation and capacity fading of anodes using nanostructured materials, high-rate lithiation-induced reactivation offers a new perspective in designing high-performance electrodes for long-lived lithium-ion batteries.

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Section: Resultsmentioning

confidence: 99%

“…The hollow and mesoporous Co 3 O 4 spheres were synthesized using a surfactant-assisted solvothermal method 33 . Specifically, 2.4 mmol of Co(NO 3 ) 2 Á 6H 2 O and 0.8 ml of deionized water were dissolved in 22 ml of absolute methanol to form a red solution.…”

Section: Methodsmentioning

confidence: 99%

High-rate lithiation-induced reactivation of mesoporous hollow spheres for long-lived lithium-ion batteries

et al. 2014

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“…39,[70][71][72][73][74][75][76][77][78] The modifier plays a different role in each type of synthesis, and their effects are not completely understood. The use of a modifier in the chemical synthesis of nanomaterials has been employed to obtain new shapes with different sizes, which promotes the formation of materials with different chemical behaviour.…”

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confidence: 99%

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

Porta

Andrés

et al. 2014

Phys. Chem. Chem. Phys.

113

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“…Up to now, Co 3 O 4 nanoparticles with various morphologies such as nanospheres [31,32], nanorods [33][34][35][36], nanowalls [37], nanoneedles [38], nanobelts [39], nanowires [40], nanoflowers [41], nanotubes [42,43], nanofibers [44], nanodiscs [45], and nanochains [46] have been synthesized with different approaches, including urea precipitation [47], chemical vapor deposition [48], sol-gel [49], microwave-assisted process [50], wet chemical approach [51], and hydrothermal method [39,[52][53][54]. Hydrothermal methods are widely used to produce various different Co 3 O 4 nanomaterials.…”

Section: Introductionmentioning

confidence: 99%

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

Eskalen¹,

Kerli²,

Özğan³

2017

Cobalt

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In this study, cobalt oxide Co 3 O 4 nanostructured material is synthesized by hydrothermal method by using different concentration of cobalt acetate salt at unique hydrothermal reaction time for five different hydrothermal reaction temperatures 105, 120, 140, 160, and 180 C. The obtained nanoparticles are annealed at 300 C for 5 h. Co 3 O 4 nanostructures are determined by means of scanning electron microscopy (SEM), X-ray diffraction (XRD), and UV-vis spectroscopy. The hydrothermally produced samples were reannealed at 550 C, and morphological and structural properties were investigated deeply again. The effect of annealing temperature on morphologies and crystalline structure of cobalt oxide nanoparticle (NP) was also investigated. Nanopyramids and nanorods are two main morphologically obtained structures from the hydrothermal experiment. Nematic liquid crystal mixture E7 is doped with Co 3 O 4 nanorod. Phase transition and threshold voltage of pure and Co 3 O 4 NP-doped E7 LC are examined successfully. It reveals that for Co 3 O 4 NP-doped E7 phase transition temperature and threshold voltage increased very slightly.

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Surfactant-Assisted Solvothermal Synthesis of Co₃O₄ Hollow Spheres with Oriented-Aggregation Nanostructures and Tunable Particle Size

Cited by 202 publications

References 52 publications

High-rate lithiation-induced reactivation of mesoporous hollow spheres for long-lived lithium-ion batteries

High-rate lithiation-induced reactivation of mesoporous hollow spheres for long-lived lithium-ion batteries

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

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Surfactant-Assisted Solvothermal Synthesis of Co3O4 Hollow Spheres with Oriented-Aggregation Nanostructures and Tunable Particle Size

Cited by 202 publications

References 52 publications

High-rate lithiation-induced reactivation of mesoporous hollow spheres for long-lived lithium-ion batteries

High-rate lithiation-induced reactivation of mesoporous hollow spheres for long-lived lithium-ion batteries

Zinc blende versus wurtzite ZnS nanoparticles: control of the phase and optical properties by tetrabutylammonium hydroxide

Hydrothermally Produced Cobalt Oxide Nanostructures at Different Temperatures and Effect on Phase Transition Temperature and Threshold Voltage of Nematic Liquid Crystal Host

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Surfactant-Assisted Solvothermal Synthesis of Co₃O₄ Hollow Spheres with Oriented-Aggregation Nanostructures and Tunable Particle Size