Synthesis of porous rhombus-shaped Co3O4 nanorod arrays grown directly on a nickel substrate with high electrochemical performance

Mei, Weimin; Huang, Jun; Zhu, Liping; Ye, Zhizhen; Mai, Y.J.; Tu, Jiangping

doi:10.1039/c2jm00123c

Cited by 174 publications

(118 citation statements)

References 41 publications

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“…The rate capability however is limited, as this anode delivered only 750 mAh g À1 at 1C rate instead of 1000 mAh g À1 in ref. [580]. The higher rate capability obtained in ref.…”

Section: Co 3 Omentioning

confidence: 80%

“…[580] may be attributable to the fact that one-dimensional structure (nanorods) can better accommodate the volume change upon cycling than the geometry used in ref. [580] (plate-like particles). Coating nano-Co 3 O 4 has also been tried to improve the electrochemical properties.…”

Section: Co 3 Omentioning

confidence: 97%

“…The synthesis of free-standing one-dimensional anode elements grown directly on conducting substrates in a controlled manner is an important issue to support the large changes of volume without affecting the integrity of the anode. In the particular case of Co 3 O 4 the efforts include the synthesis of well-aligned rhombus-shaped Co 3 O 4 nanorod arrays grown directly on nickel foil via fluorine-mediated synthesis though a hydrothermal method [580]. These nanorods exhibit the combined properties of meso-porosity and quasi-single-crystalline structure, and meanwhile, exhibit robust mechanical [575] adhesion to the nickel foil.…”

Section: Co 3 Omentioning

confidence: 99%

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Anodes for Li-Ion Batteries

et al. 2016

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Lithium-ion batteries (LiBs) have made considerable progress since the first commercial one by Sony in 1991, which had LiCoO 2 and graphite as active elements of the positive and negative electrodes, respectively. The LiBs are now the primary energy storage devices in the transportation and communications, from portable use in computers, up to electric and hybrid vehicles. More recently, they have also been used as back-up supply units, frequency regulators (load leveling) to integrate on smart grids the electricity produced by windmills and photovoltaic plants (for a recent review, see [1]). These applications require high energy densities, high power, and safety among others. Considerable efforts have been made to propose other electrodes to fulfill these requirements. We have recently reviewed the works and progress concerning the materials for the positive electrode [2][3][4][5][6]. The present work is devoted to the materials for the negative electrode counterpart. It is common to use the terminology anode and cathode for the negative and positive electrodes, respectively, although the electrodes play alternatively the role of anode and cathode during the charge and discharge process. We shall use this terminology in the following for conciseness purposes only.An ideal active anode element should fulfill the following requirements as follows: (1) It must be light and accommodate as much Li as possible to optimize the gravimetric capacity. (2) Its redox potential with respect to Li 0 /Li + must be as small as possible at any Li-concentration. The reason is that this potential is subtracted to the redox potential of the cathode material to give the overall voltage of the cell, and smaller voltage means smaller energy density. (3) It must possess good electronic and ionic conductivities since faster motion of the lithium ions and the electrons also mean higher power density of the cell. (4) It must not be soluble in the solvents of the electrolyte and not react with the lithium salt. (5) It must be safe, i.e. avoid any thermal runaway of the battery, a criterion that is not independent of the previous one, but deserves special attention, especially for use in transportation such as electric vehicles and planes. (6) It must be cheap and environmentally friendly. The different materials proposed as anode elements for Li-ion batteries must be discussed with respect to these different criteria.The graphite is still the most used anode material and is still the reference. The first works giving evidence of the insertion of lithium in graphite date from 1955 [7], confirmed by the synthesis of LiC 6 in 1965 [8]. The synthesis of LiC 6 , however, was not obtained by electrochemical process at that time. Another decade was spent before Besenhard and Eichinger discovered the reversible intercalation of lithium in graphite, proposing this material as an anode in 1976 [9,10]. Increasing the Li content in LiC 6 is possible [8], but no reversible cycling beyond LiC 6 could ever be obtained. The graphite anode can thus be cyc...

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“…The rate capability however is limited, as this anode delivered only 750 mAh g À1 at 1C rate instead of 1000 mAh g À1 in ref. [580]. The higher rate capability obtained in ref.…”

Section: Co 3 Omentioning

confidence: 80%

Section: Co 3 Omentioning

confidence: 97%

Section: Co 3 Omentioning

confidence: 99%

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Anodes for Li-Ion Batteries

et al. 2016

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“…16 In the second cycle, the main cathodic peak shifts to 1.1 V and the peak current rapidly decreases compared with the first cycle due to the irreversible electrode reaction. 17 In contrast, the cathodic peak negatively shifts and the anodic peak positively shifts due to the hysteresis. 18 LTO/Co 3 O 4 -20 exhibits two pairs of redox peaks corresponding to the LTO and Co 3 O 4 peaks and the intensity of the LTO peak is greater than that of Co 3 O 4 .…”

Section: Resultsmentioning

confidence: 99%

Li₄Ti₅O₁₂/Co₃O₄Composite for Improved Performance in Lithium-Ion Batteries

Hong

Ryu

2015

J. Electrochem. Soc.

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To take advantage of the best properties of both LTO and Co 3 O 4 , Li 4 Ti 5 O 12 /Co 3 O 4 composites were synthesized by the solution combustion and solution precipitation methods. The diffraction patterns of Li 4 Ti 5 O 12 (LTO), Co 3 O 4 , and LTO/Co 3 O 4 composites were well-indexed as a cubic spinel structure with the Fd-3m space group. As shown in the FE-SEM images, the Co 3 O 4 particles are attached on the surface of LTO, especially in the pore, and this structure is expected to prevent volume expansion and particle aggregation of Co 3 O 4 particles. As expected, the LTO/Co 3 O 4 composite had higher capacity than that of LTO, with a decreased slope and an extended plateau region over the voltage range of 0.01-3.0 V. LTO/Co 3 O 4 -20 delivered a reversible discharge capacity of 300 mAh g −1 at a constant current density of 160 mA g −1 . Also, it exhibited only a slight capacity drop with increasing current density. Galvanostatic intermittent titration technique and X-ray absorption near-edge structure spectroscopy were also conducted to Spinel Li 4 Ti 5 O 12 (LTO) has an excellent reversibility of Li-ion intercalation/de-intercalation and exhibits zero-strain volume change during cycling with excellent safety performance. Moreover, LTO has a high voltage plateau at 1.55 V vs. Li/Li + , which can avoid the formation of metallic lithium. Therefore, LTO has been investigated to use as the anode material of lithium ion batteries for energy storage, electric vehicles, and hybrid electric vehicles.1-3 However, unfortunately LTO has a low electronic conductivity with a low theoretical capacity of 175 mAh g −1 . These drawbacks restrict its applications in high-power storage devices. In this work, we attempted to overcome the low theoretical capacity of LTO and the poor cycling performance of Co 3 O 4 by synthesizing the LTO/Co 3 O 4 composites. Firstly, pristine LTO was synthesized by a two-step solution-combustion method and then LTO/Co 3 O 4 composites were synthesized by a solution precipitation method. ExperimentalMaterials synthesis.-LTO was synthesized using a solutioncombustion reaction.14 Titanium (IV) isopropoxide [Ti{OCH(CH 3 ) 2 } 4 ] was slowly dropped into distilled water under 10• C. After white precipitates (TiO(OH) 2 ) were observed, nitric acid was added and the mixture was constantly stirred until the appearance turned to transparent. Then, lithium nitrate was dissolved in distilled water and glycine was added as a fuel. After stirring at 80• C for 5 h to form a viscous gel, the precursor was dropped into an alumina crucible preheated to 500• C. This crucible was placed in a muffle furnace and heated at 750• C for 12 h. LTO/Co 3 O 4 composites were synthesized by using precipitation reaction of Co 2+ ion. The as-prepared LTO was uniformly dispersed in distilled water under stirring for 30 min, after that a certain quantity of Co(NO 3 ) 6 · H 2 O was dropped into the solution with mass ratios of 20 and 40, respectively. Then, NH 3 · H 2 O was slowly added into the above suspension and then s...

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“…One of the most successful strategies for resolving these problems has been through the fabrication of nanosized structures. A great deal of research have focused on developing materials exhibiting novel morphologies, including nanowires [27,28], nanorods [29], nanoparticles [30], nanosheets [31], and hollow structures [13,26,32]. Generally speaking, hollow microstructures with nanosized subunits and designed voids [13,26,33,34], exhibit especially good electrochemical properties due to the increased mass-electrolyte contact area, shortened Li þ diffusion distance, and alleviated structural strain that results from repeated lithium insertion-extraction process.…”

Section: Introductionmentioning

confidence: 99%

Urchin-like hollow-structured cobalt oxides with excellent anode performance for lithium-ion batteries

Chen

Saito

Akiyama

2015

Journal of Alloys and Compounds

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a b s t r a c tUrchin-like CoO and Co 3 O 4 hollow structures with potential use as anodes in lithium ion batteries were synthesized via the facile thermal decomposition of precipitated amorphous cobalt carbonate hydroxide under either Ar or air. The morphology and, consequently, electrochemical properties of the samples were highly dependent on the precipitation temperature. The cobalt oxides, as derived from precursors that were obtained at room temperature, exhibited superior activity to those obtained at 50 C and 80 C because of their unique nanosized architecture. Meanwhile, CoO samples demonstrated much better cyclability and rate capability than Co 3 O 4 samples, as they exhibited much higher coulombic efficiency and lower hysteresis for lithium insertion/extration. The curved, short, and closely entangled nanowires of CoO sample, which was derived from room temperature precursor, yielded excellent electrochemical performance. The sample displayed a high reversible capacity of about 850 mAh g À1 at a current density of 500 mA g À1 , a good stability through 50 cycles with a high coulombic efficiency of about 98%, and a high rate capability of 610 mAh g À1 even at a rate of 3000 mA g À1 .

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Synthesis of porous rhombus-shaped Co3O4 nanorod arrays grown directly on a nickel substrate with high electrochemical performance

Cited by 174 publications

References 41 publications

Anodes for Li-Ion Batteries

Anodes for Li-Ion Batteries

Li₄Ti₅O₁₂/Co₃O₄Composite for Improved Performance in Lithium-Ion Batteries

Urchin-like hollow-structured cobalt oxides with excellent anode performance for lithium-ion batteries

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Synthesis of porous rhombus-shaped Co3O4 nanorod arrays grown directly on a nickel substrate with high electrochemical performance

Cited by 174 publications

References 41 publications

Anodes for Li-Ion Batteries

Anodes for Li-Ion Batteries

Li4Ti5O12/Co3O4Composite for Improved Performance in Lithium-Ion Batteries

Urchin-like hollow-structured cobalt oxides with excellent anode performance for lithium-ion batteries

Contact Info

Product

Resources

About

Li₄Ti₅O₁₂/Co₃O₄Composite for Improved Performance in Lithium-Ion Batteries