Nanogravel structured NiO/Ni foam as electrode for high-performance lithium-ion batteries

Rahman, Asma; Wen, Cuié

doi:10.1007/s11581-015-1475-2

Cited by 25 publications

(23 citation statements)

References 81 publications

(103 reference statements)

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“…9 ). The semicircle in high-frequency region is related to the solid electrolyte interphase (SEI) film and the medium-frequency semicircle due to the charge transfer resistance, and the inclined line in the low-frequency region represents the diffusion of lithium ions 43 44 . The surface film resistance, which originates from the SEI, and the charge transfer resistance of the graphene/Cr 2 O 3 (particle)/PVDF electrode were 12.3 and 56.9 Ω, respectively.…”

Section: Resultsmentioning

confidence: 99%

Mass production of two-dimensional oxides by rapid heating of hydrous chlorides

Zhao

Zhang

et al. 2016

Nat Commun

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Two-dimensional (2D) nanoscale oxides have attracted research interest owing to their electronic, magnetic optical and catalytic properties. If they could be manufactured on a large scale, 2D oxides would be attractive for applications ranging from electronics to energy conversion and storage. Herein, we report facile fabrication of oxide nanosheets by rapid thermal annealing of corresponding hydrous-chloride compounds. By heating CrCl3·6H2O, ZrOCl2·8H2O, AlCl3·6H2O and YCl3·6H2O crystals as precursors, we immediately collect large quantities of ultrathin Cr2O3, ZrO2, Al2O3 and Y2O3 nanosheets, respectively. The formation of layered nanosheets relies on exfoliation driven by rapid evaporation of water and/or other gas molecules generated under annealing. Our route allows simple, efficient and inexpensive production of 2D oxides. As a demonstration, we evaluate Cr2O3 nanosheets prepared by our method as anodes in lithium-ion batteries and find superior performance in comparison with their microcrystalline counterparts.

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Section: Resultsmentioning

confidence: 99%

Mass production of two-dimensional oxides by rapid heating of hydrous chlorides

Zhao

Zhang

et al. 2016

Nat Commun

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“…The mechanical properties of np-TiO 2 are critical to its successful application as electrodes of LIBs. Our previous studies showed that the enhanced electrochemical performance of NiO electrodes as anode of LIBs was due to its enhanced mechanical properties [59,60] . In addition, Riley et al investigated the mechanical [61] and electrochemical properties [62] of electrodes of LIBs and indicated that the enhanced electrochemical performance was found to be resulted from the 50% increase in hardness of electrode materials.…”

Section: Mechanical Properties Of Np-tiomentioning

confidence: 99%

“…It is noted that the values of R 1 of np-TiO 2 -Li cells were decreased after 420 cycles compared to fresh cells. This is due to the formation of the passive films on the surface of the electrodes during initial cycling, which consumes the components in the electrolyte, leading to an increase in the concentration of Li ions in the electrolyte and improvement in the conductivity of the electrolyte [59,97] . The R 1 becomes smaller with increased cycle numbers because the reaction for passive film formation is not reversible [98] .…”

Section: Np-tio 2 Electrodementioning

confidence: 99%

Improvement on electrochemical performances of nanoporous titania as anode of lithium-ion batteries through annealing of pure titanium foils

Rahman

Wong

Song

et al. 2018

Journal of Energy Chemistry

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“…56,57 This implies that there is a significant layer of NiO on the surface of the Ni foam after heating to 300…”

Section: Resultsmentioning

confidence: 99%

Assessing Charge Contribution from Thermally Treated Ni Foam as Current Collectors for Li-Ion Batteries

Geaney

McNulty

O’Connell

et al. 2016

J. Electrochem. Soc.

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In this report we have investigated the use of Ni foam substrates as anode current collectors for Li-ion batteries. As the majority of reports in the literature focus on hydrothermal formation of materials on Ni foam followed by a high temperature anneal/oxidation step, we probed the fundamental electrochemical responses of as received Ni foam substrates and those subjected to heating at 100 • C, 300 • C and 450 • C. Through cyclic voltammetry and galvanostatic testing, it is shown that the as received and 100 • C annealed Ni foam show negligible electrochemical activity. However, Ni foams heated to higher temperature showed substantial electrochemical contributions which may lead to inflated capacities and incorrect interpretations of CV responses for samples subjected to high temperature anneals. XRD, XPS and SEM analyses clearly illustrate that the formation of electrochemically active NiO nanoparticles on the surface of the foam is responsible for this behavior. To further investigate the contribution of the oxidized Ni foam to the overall electrochemical response, we formed Co 3 O 4 nanoflowers directly on Ni foam at 450 • C and showed that the resulting electrochemical response was dominated by NiO after the first 10 charge/discharge cycles. This report highlights the importance of assessing current collector activity for active materials grown on transition metal foam current collectors for Li-ion applications. Lithium-ion batteries have found widespread use in portable electronic devices due to their improved performance in comparison with other battery chemistries (e.g. lead-acid, NiMH etc.).1-4 Stimulated by the need for improved batteries for more demanding applications, the field has seen a wave of interest in the development of novel materials for every component of the battery (anode, cathode, current collectors and electrolytes).5-10 Practically all literature studies focused on the development of materials for Li-ion batteries report specific capacities primarily in terms of mAhg −1 . 11-13 While the use of common specific capacity units allows different material systems to be compared quickly, it often means that important considerations for real-world applications are ignored. For example, materials with low tap densities or a high degree of porosity can lead to electrodes which exhibit fantastic capacities in terms of mAhg −1 but poor mass loadings and thus areal/volumetric capacities which are unsuited to real-world devices. This is particularly true for nanoscale materials which often lead to sub-mg level electrode mass loadings. In fact, it is well established that materials tend to perform better when using low mass loadings, 14-17 making the concept of using low mass loadings particularly attractive in terms of maximizing the calculated capacity in terms of mAhg −1 . Given that the merits of materials are often assessed solely on the specific capacity (in terms of mAhg −1 ), it is crucial that the specific capacity values calculated for a system is a genuine representation of the material...

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Nanogravel structured NiO/Ni foam as electrode for high-performance lithium-ion batteries

Cited by 25 publications

References 81 publications

Mass production of two-dimensional oxides by rapid heating of hydrous chlorides

Mass production of two-dimensional oxides by rapid heating of hydrous chlorides

Improvement on electrochemical performances of nanoporous titania as anode of lithium-ion batteries through annealing of pure titanium foils

Assessing Charge Contribution from Thermally Treated Ni Foam as Current Collectors for Li-Ion Batteries

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