Nano-phase tin hollandites, K2(M2Sn6)O16(M = Co, In) as anodes for Li-ion batteries

Das, B. K.; Reddy, M. V.; Rao, G. V. Subba; Chowdari, B. V. R.

doi:10.1039/c0jm02098b

Cited by 59 publications

(54 citation statements)

References 44 publications

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“…The high irreversibility of the initial cycle is frequently observed in previous studies. It is reported that this phenomenon can be caused by various reasons such as the formation of the SEI film, nature of the crystal structure, particle size, operating voltage, and the solvent reduction [11,14,[25][26][27][28][29]. The plateau (0.6-0.8 V) in the first discharge curve was shifted to a higher position (0.7-0.9 V) in the subsequent discharge curves, which is in accordance with cyclic voltammogram.…”

Section: Resultssupporting

confidence: 79%

Biomass-Derived Graphitic Carbon Encapsulated Fe/Fe3C Composite as an Anode Material for High-Performance Lithium Ion Batteries

Liu

Haridas

et al. 2020

Energies

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Lithium ion (Li-ion) batteries have been widely applied to portable electronic devices and hybrid vehicles. In order to further enhance performance, the search for advanced anode materials to meet the growing demand for high-performance Li-ion batteries is significant. Fe3C as an anode material can contribute more capacity than its theoretical one due to the pseudocapacity on the interface. However, the traditional synthetic methods need harsh conditions, such as high temperature and hazardous and expensive chemical precursors. In this study, a graphitic carbon encapsulated Fe/Fe3C (denoted as Fe/Fe3C@GC) composite was synthesized as an anode active material for high-performance lithium ion batteries by a simple and cost-effective approach through co-pyrolysis of biomass and iron precursor. The graphitic carbon shell formed by the carbonization of sawdust can improve the electrical conductivity and accommodate volume expansion during discharging. The porous microstructure of the shell can also provide increased active sites for the redox reactions. The in-situ-formed Fe/Fe3C nanoparticles show pseudocapacitive behavior that increases the capacity. The composite exhibits a high reversible capacity and excellent rate performance. The composite delivered a high initial discharge capacity of 1027 mAh g−1 at 45 mA g−1 and maintained a reversible capacity of 302 mAh g−1 at 200 mA g−1 after 200 cycles. Even at the high current density of 5000 mA g−1, the Fe/Fe3C@GC cell also shows a stable cycling performance. Therefore, Fe/Fe3C@GC composite is considered as one of the potential anode materials for lithium ion batteries.

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Section: Resultssupporting

confidence: 79%

Biomass-Derived Graphitic Carbon Encapsulated Fe/Fe3C Composite as an Anode Material for High-Performance Lithium Ion Batteries

Liu

Haridas

et al. 2020

Energies

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“…The general chemical formula of these hollandite‐type materials can be written as A +/2+ x B 2+/3+/4+ 8 O 16 (0 < x < 2), where A‐sites are usually occupied by alkali and or alkaline‐earth elements (eg, Na, K, Rb, Cs, Sr, and Ba) and B‐sites are often occupied by a variety of cations (eg, Mg, Co, Ni, Zn, Al, Ga, Cr, Fe, Ti, and Mn) . Hollandites have been studied for a variety of applications, such oxygen evolution reaction catalysts (K x ≈2 Ir 8 O 16 ), ferromagnetic materials (Ba 1.2 Mn 8 O 16 ), and battery electrode systems with M x Mn 8 O 16 (M = Ag or K) demonstrated as cathodes, and K 2 (M 2 Sn 6 )O 16 (M = Co, In) used as anode materials . In SYNROC‐based materials for nuclear waste immobilization, the multiphase system is based on thermodynamically compatible titanate phases.…”

Section: Introductionmentioning

confidence: 99%

Compositional control of radionuclide retention in hollandite‐based ceramic waste forms for Cs‐immobilization

Zhao

Shuller-Nickles

et al. 2018

J Am Ceram Soc

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Hollandite materials, as a class of crystalline nuclear waste forms, are promising candidates for the immobilization of radioactive elements, such as Cs, Ba, as well as a variety of lanthanide and transition-metal fission products. In this study, three Ga-doped titanate hollandite-type phases, Ba 1.33 Ga 2.67 Ti 5.33 O 16 , Ba 0.667 Cs 0.667 Ga 2 Ti 6 O 16 , and Cs 1.33 Ga 1.33 Ti 6.67 O 16 , were synthesized using a solid-state reaction route. All synthesized phases adopted a single phase tetragonal structure, as determined by powder X-ray diffraction (XRD), and elemental analysis confirmed the measured stoichiometries were close to targeted compositions. Extended X-ray absorption fine structure spectroscopy (EXAFS) was used to determine the local structural features for the framework of octahedrally coordinated cations. EXAFS data indicated that Cs 1.33 Ga 1.33 Ti 6.67 O 16 possessed the most disordered local structure centered around the Ga dopant. The enthalpies of formation of all three hollandite phases measured using high-temperature oxide melt solution calorimetry were found to be negative, indicating enthalpies of formation of these hollandites from oxides are thermodynamically stable with respect to their constituent oxides. Furthermore, the formation enthalpies were more negative and hence more favorable with increased Cs content. Finally, aqueous leaching tests revealed that high Cs content hollandite phases exhibited greater Cs retention as compared to low Cs content hollandite. While preliminary in nature, this work draws attention to the links between the capacity for radionuclide retention, atomistic level structural features and bulk thermodynamic properties of materials.

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“…[10][11][12][13][14][15][16] In particular, among these approaches, adding one or more matrix elements into the electrode materials is one of the most common strategies. [10][11][12][13][14][15][16] In particular, among these approaches, adding one or more matrix elements into the electrode materials is one of the most common strategies.…”

Section: Introductionmentioning

confidence: 99%

Pineapple-shaped ZnCo₂O₄ microspheres as anode materials for lithium ion batteries with prominent rate performance

et al. 2015

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Pineapple-shaped ZnCo 2 O 4 (ZCO) microspheres with a porous nanostructure are synthesized by a typical hydrothermal method and used as high performance anodes in Li-ion batteries. The microspheres show excellent cycling and rate performance. The initial discharge capacity of 1596.2 mA h g À1 and the reversible discharge capacity of 1132 mA h g À1 can be maintained after 120 cycles at a current density of 100 mA g À1 . More interestingly, the reversible capacity as high as 800 mA h g À1 can be retained at a high current density of 1000 mA g À1 after 200 cycles. Surprisingly, the pineapple-shaped ZCO electrode exhibits a prominent rate performance, a reversible specific capacity of 1237 mA h g À1 and 505 mA h g À1 at current densities of 500 mA g À1 and 6000 mA g À1 respectively. In addition, the influence of distilled water and urea on the phase and morphology of the material is investigated by SEM and EDS. The results indicate that adding distilled water into the solvent could ensure the high purity of products with no loss of the Zn element. At the same time, the cycle performance can be effectively improved because of the more regular surface and the more stable structure of the microspheres with urea-assistance.

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Nano-phase tin hollandites, K₂(M₂Sn₆)O₁₆(M = Co, In) as anodes for Li-ion batteries

Cited by 59 publications

References 44 publications

Biomass-Derived Graphitic Carbon Encapsulated Fe/Fe3C Composite as an Anode Material for High-Performance Lithium Ion Batteries

Biomass-Derived Graphitic Carbon Encapsulated Fe/Fe3C Composite as an Anode Material for High-Performance Lithium Ion Batteries

Compositional control of radionuclide retention in hollandite‐based ceramic waste forms for Cs‐immobilization

Pineapple-shaped ZnCo₂O₄ microspheres as anode materials for lithium ion batteries with prominent rate performance

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Nano-phase tin hollandites, K2(M2Sn6)O16(M = Co, In) as anodes for Li-ion batteries

Cited by 59 publications

References 44 publications

Biomass-Derived Graphitic Carbon Encapsulated Fe/Fe3C Composite as an Anode Material for High-Performance Lithium Ion Batteries

Biomass-Derived Graphitic Carbon Encapsulated Fe/Fe3C Composite as an Anode Material for High-Performance Lithium Ion Batteries

Compositional control of radionuclide retention in hollandite‐based ceramic waste forms for Cs‐immobilization

Pineapple-shaped ZnCo2O4 microspheres as anode materials for lithium ion batteries with prominent rate performance

Contact Info

Product

Resources

About

Nano-phase tin hollandites, K₂(M₂Sn₆)O₁₆(M = Co, In) as anodes for Li-ion batteries

Pineapple-shaped ZnCo₂O₄ microspheres as anode materials for lithium ion batteries with prominent rate performance