Surface reaction of β-FeOOH film negative electrode for lithium-ion cells

Tabuchi, Toru; Katayama, Yoshihiro; Nukuda, Toshiyuki; Ogumi, Zempachi

doi:10.1016/j.jpowsour.2009.02.021

Cited by 32 publications

(24 citation statements)

References 16 publications

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“…These indicate that the 0.12 and 0.80 V plateaus most probably correspond to electrolyte decomposition and other SEI-forming processes, and that the higher voltage plateau is probably due to the ? of the first cycle in the dQ/dV curve are characteristic of the reduction of iron oxides (Fe 2 O 3 , Fe 3 O 4 ) and oxyhydroxides (FeOOH) in good agreement with which has been previously reported [23][24][25]. The electrochemical behavior of the as-deposited Fe-nanoparticles films is significantly different from that of the Fe-C films, which confirms our previous observations regarding the performance of the composite.…”

Section: Electrochemical Performancesupporting

confidence: 91%

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Processing nanoparticle–nanocarbon composites as binder-free electrodes for lithium-based batteries

Baloch

Kubiak

Roddatis

et al. 2017

Mater Renew Sustain Energy

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The processing of battery materials into functional electrodes traditionally requires the preparation of slurries using binders, organic solvents, and additives, all of which present economic and environmental challenges. These are amplified in the production of nanostructured carbon electrodes which are often more difficult to disperse in slurries and require more energy-intensive and longer processing. In this study we demonstrate a new process for preparing binder-free nanocarbon/nanoparticle (Fe-C) composite electrodes and study the effect of processing on the nanocomposite's cycling performance in lithium cells. The binder-free electrodes were prepared by a two-step method: pulsed-electrodeposition of iron-based catalyst followed by chemical vapor deposition of a carbon film. SEM and TEM of the Fe-C showed that the active materials have a fibrous and tortuous morphology with disordered nanocrystalline domains characteristic of an amorphous carbon. The Fe-C electrodes showed good mechanical stability and an excellent cycle performance with an average stable capacity of 221 mAhg -1 , and 85% capacity retention for up to 50 cycles. By reducing the number of processing steps and eliminating the use of binders and other chemicals this new method offers a ''greener'' alternative than current processing methods. Graphical abstractSynopsis: gains in sustainability can be achieved by eliminating use of binders, chemicals, and the number of electrode's processing steps in this new method.

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Section: Electrochemical Performancesupporting

confidence: 91%

“…Iron species such as Fe 2 O 3 , Fe 3 O 4 , and FeOOH can react electrochemically with Li ? providing extra capacity but suffering from pulverization and side reactions with the electrolyte [23][24][25]. Fe-C nano-composites (Fig.…”

Section: Electrochemical Performancementioning

confidence: 99%

Processing nanoparticle–nanocarbon composites as binder-free electrodes for lithium-based batteries

Baloch

Kubiak

Roddatis

et al. 2017

Mater Renew Sustain Energy

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“…After an activation process in the initial 50 cycles, the F‐CuO anode then exhibits a stable cycling behavior with an activated capacity retained at 785 mAh g −1 for the rest 50 cycles. It should be noted that this high reversible capacity exceeding the theoretical value of F‐CuO (723 mAh g −1 , calculated based on CuO•FeOOH 0.24 ) can be attributed to the formation/deformation of solid electrolyte interface (SEI) layers and interfacial storage . In comparison, both solid CuO and Cu 2 O octahedra anodes display an obvious capacity decay with remaining capacities of merely 69 and 45 mAh g −1 after 100 cycles under the same conditions, respectively.…”

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confidence: 89%

Self‐Templated Formation of Uniform F‐CuO Hollow Octahedra for Lithium Ion Batteries

Rui

Zhang

et al. 2016

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Novel F-CuO and FeOOH hollow octahedra are developed through a facile structure-evolution reaction. The formation of interior voids within the hierarchical octahedra is motivated by the Cl ions based etching, under a precise control over reaction agents and conditions. Owing to the synergistic effect of unique structural features and favorable composition, the hollow octahedra exhibit superior lithium-storage properties.

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“…Akaganeite itself offers many technological applications because of its large surface area, non-toxicity, and facile synthesis. For instance, akaganeite has been used as a battery anode, as a catalyst for biomedical applications, as an adsorbent for soil remediation, and for CO 2 capture (Willard et al ., 2004; Tabuchi et al ., 2009a, b; Dutcher et al ., 2011; Lammers et al ., 2011; Ali, 2012; Chen et al ., 2013; Fütterer et al ., 2013; Kou and Varma, 2013; Kumar et al ., 2014). Thus, akaganeite synthesis is the focus of much research.…”

Section: Introductionmentioning

confidence: 99%

Evolution in the structure of akaganeite and hematite during hydrothermal growth: anin situsynchrotron X-ray diffraction analysis

2018

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Synchrotron X-ray diffraction was used to monitor the hydrothermal precipitation of akaganeite (β-FeOOH) and its transformation to hematite (Fe2O3) in situ. Akaganeite was the first phase to form and hematite was the final phase in our experiments with temperatures between 150 and 200 °C. Akaganeite was the only phase that formed at 100 °C. Rietveld analyses revealed that the akaganeite unit-cell volume contracted until the onset of dissolution, and subsequently expanded. This reversal at the onset of dissolution was associated with a substantial and rapid increase in occupancy of the Cl site, perhaps by OH− or Fe3+. Rietveld analyses supported the incipient formation of an OH-rich, Fe-deficient hematite phase in experiments between 150 and 200 °C. The inferred H concentrations of the first crystals were consistent with “hydrohematite.” With continued crystal growth, the Fe occupancies increased. Contraction in both a- and c-axes signaled the loss of hydroxyl groups and formation of a nearly stoichiometric hematite.

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Surface reaction of β-FeOOH film negative electrode for lithium-ion cells

Cited by 32 publications

References 16 publications

Processing nanoparticle–nanocarbon composites as binder-free electrodes for lithium-based batteries

Processing nanoparticle–nanocarbon composites as binder-free electrodes for lithium-based batteries

Self‐Templated Formation of Uniform F‐CuO Hollow Octahedra for Lithium Ion Batteries

Evolution in the structure of akaganeite and hematite during hydrothermal growth: anin situsynchrotron X-ray diffraction analysis

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