Hydrothermal synthesis of Co3O4 microspheres as anode material for lithium-ion batteries

Liu, Yan; Mi, Changhuan; L, Su; Zhang, Xiaogang

doi:10.1016/j.electacta.2007.10.020

Cited by 186 publications

(134 citation statements)

References 27 publications

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“…Magnetic nanoparticles of cobalt oxide (Co 3 O 4 ) present a variety of technological applications, such as in energy storing [1][2][3][4], electrochromic and magnetoresistive devices [5][6][7][8][9][10][11], ferrofluid [12], catalysis [13][14][15][16][17][18], and biomedical technologies [19][20][21][22][23][24]. The magnetic nanoparticles have been tested in order to transport controlled drugs and release them in a controlled way, for example, in hyperthermia for cancer treatments [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Effect of the Silica Cover on the Properties of Co 3 O 4 Nanoparticles

Alba

Martı́nez

Guerrero

et al. 2016

J Supercond Nov Magn

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Cobalt oxide nanoparticles were functionalized with sodium citrate and coated with a silica shell (Co 3 O 4 @Q@SiO 2 ). Different experimental configurations were tested in order to obtain low-sized cobalt oxide nanoparticles with high crystallinity, using the chemical reduction-oxidation method. Then, the nanoparticles were coated with silica using the Stöber method, obtaining a silica cover on top of the cobalt oxide nanoparticle surface with a few nanometers thickness. This method permits the functionalization of the nanoparticles at the time of coating. Results show that with a heat treatment of 500 • C, highcrystallinity cobalt oxide nanoparticles are obtained with a spherical shape and an average diameter of 30 nm, whereas the silica cover has 5 nm thickness. Evidence of nanoparticle functionalization was obtained through the measurement of the absorption bands of the functional groups of the sodium citrate with a silica cover. In addition, coated

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Section: Introductionmentioning

confidence: 99%

Effect of the Silica Cover on the Properties of Co 3 O 4 Nanoparticles

Alba

Martı́nez

Guerrero

et al. 2016

J Supercond Nov Magn

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“…This compound is environmentally friendly, has mixed valence [Co II and Co III ], a spinel structure [31] and has a high theoretical capacitance (3560 F/g) [32]. Co 3 O 4 has been widely studied for its application as lithium ion battery electrodes, in pseudo-capacitances, catalysts for CO at low temperature, dye removal, ceramic pigments, fieldemission materials and magnetic material [31][32][33][34][35][36][37]. Co 3 O 4 in the form of microspheres [34,36], nanoplates and nanobelts [38] have been prepared by hydrothermal processes.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and investigation of the electrical and dielectric properties of Co3O4/(CMC+PVA) nanocomposite films

Sayed

El‐Gamal

2015

J Polym Res

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Cobalt oxide (Co 3 O 4 ) nanoparticles (NPs), with average crystallite size<61 nm, were prepared by a sol-gel method. Two allowed direct optical band gaps of 1.445 and 1.915 eV are found for Co 3 O 4 NPs. Sodium carboxymethyl cellulose (Na-CMC)/polyvinyl alcohol (PVA) blend was doped with Co 3 O 4 at different concentrations<1.0 wt.% to study the electrical and dielectric properties of these nanocomposite films. Scanning electron microscopy images revealed a good dispersion of Co 3 O 4 NPs on the surface of the CMC/PVA films. The current-voltage characteristics are of non-ohmic behavior. The dielectric permittivity (ε') was studied in the frequency and temperature range of 5.0 kHz-5.0 MHz and 308-408 K and was found to depend on the Co 3 O 4 content. The dielectric loss (ε^) also increases and shows wave-like behavior with increasing Co 3 O 4 ratio. Increasing Co 3 O 4 NPs content leads to the formation of more number of three-dimensional semiconducting connected networks inside CMC/PVA matrix, leading to increasing both DC and AC conductivities. The correlated barrier hopping (CBH) is the most suitable mechanism to explain the AC conduction behavior in the Co 3 O 4 / Na-CMC/ PVA nanocomposite films.

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“…[36][37][38] However, the reduction peaks were also located at around 0.64 V in the subsequent cycles, corresponding to the reverse reduction and oxidation processes [Eqs. (2) and (3)].…”

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confidence: 99%

Synthesis of Cobalt Ion‐Based Coordination Polymer Nanowires and Their Conversion into Porous Co₃O₄ Nanowires with Good Lithium Storage Properties

Yin

Chen

et al. 2010

Chemistry A European J

138

115

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Cobalt ion-based coordination polymer nanowires were synthesized by using nitrilotriacetic acid (NA) as a chelating agent by a one-step hydrothermal approach. In the synthesis, cobalt ions were bonded with amino or carboxyl groups of NA to form one-dimension polymer nanowires, which can be confirmed by FTIR and TGA results. Our experimental results show that the morphologies of polymer nanowires greatly depend on the precursor salts, ratios between deionized water and isopropyl alcohol. The probable molecular formula and growth mechanism have been proposed. After heat treatment, the cobalt ion-based coordination polymer nanowires can be converted into porous Co(3)O(4) nanowires, which completely preserved the nanowire-like morphology. When used as anodes in lithium-ion batteries, the obtained porous Co(3)O(4) nanowires exhibited a high reversible capacity of 810 mA h g(-1) and stable cyclic retention at 30th cycle. The good electrochemical performance could be attributed to the porous nanostructure of Co(3)O(4), which provides pathways for easy accessibility of electrolytes and fast transportation of lithium ions.

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Hydrothermal synthesis of Co3O4 microspheres as anode material for lithium-ion batteries

Cited by 186 publications

References 27 publications

Effect of the Silica Cover on the Properties of Co 3 O 4 Nanoparticles

Effect of the Silica Cover on the Properties of Co 3 O 4 Nanoparticles

Synthesis and investigation of the electrical and dielectric properties of Co3O4/(CMC+PVA) nanocomposite films

Synthesis of Cobalt Ion‐Based Coordination Polymer Nanowires and Their Conversion into Porous Co₃O₄ Nanowires with Good Lithium Storage Properties

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Hydrothermal synthesis of Co3O4 microspheres as anode material for lithium-ion batteries

Cited by 186 publications

References 27 publications

Effect of the Silica Cover on the Properties of Co 3 O 4 Nanoparticles

Effect of the Silica Cover on the Properties of Co 3 O 4 Nanoparticles

Synthesis and investigation of the electrical and dielectric properties of Co3O4/(CMC+PVA) nanocomposite films

Synthesis of Cobalt Ion‐Based Coordination Polymer Nanowires and Their Conversion into Porous Co3O4 Nanowires with Good Lithium Storage Properties

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Product

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Synthesis of Cobalt Ion‐Based Coordination Polymer Nanowires and Their Conversion into Porous Co₃O₄ Nanowires with Good Lithium Storage Properties