Microwave Combustion for Modification of Transition Metal Oxides

Wan, Jun; Xu, Yongzhao; Gao, Xiang; Xu, Xiao; Li, Tianqi; Wu, Jiabin; Sun, Wenjuan; Hu, Zhimi; Yu, Huimin; Huang, Liang; Liu, Meilin; Zhou, Jun

doi:10.1002/adfm.201603125

Cited by 49 publications

(36 citation statements)

References 63 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure e shows that the FMSC retains 88.9% of its initial capacitance after 5000 charge/discharge cycles and 78.7% after 10 000 cycles. The coulombic efficiency after 10 000 cycles is around 98%, indicating the highly stable structure of the fiber electrodes . To explore the reasons for the capacitance decay after the long‐term cycling, we compared Nyquist plots of the FMSC after 1 cycle and 10 000 cycles in Figure S19a (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Nano‐RuO₂‐Decorated Holey Graphene Composite Fibers for Micro‐Supercapacitors with Ultrahigh Energy Density

Zhai

Wang

Karahan

et al. 2018

Small

122

View full text Add to dashboard Cite

Compactness and versatility of fiber-based micro-supercapacitors (FMSCs) make them promising for emerging wearable electronic devices as energy storage solutions. But, increasing the energy storage capacity of microscale fiber electrodes, while retaining their high power density, remains a significant challenge. Here, this issue is addressed by incorporating ultrahigh mass loading of ruthenium oxide (RuO ) nanoparticles (up to 42.5 wt%) uniformly on nanocarbon-based microfibers composed largely of holey reduced graphene oxide (HrGO) with a lower amount of single-walled carbon nanotubes as nanospacers. This facile approach involes (1) space-confined hydrothermal assembly of highly porous but 3D interconnected carbon structure, (2) impregnating wet carbon structures with aqueous Ru ions, and (3) anchoring RuO nanoparticles on HrGO surfaces. Solid-state FMSCs assembled using those fibers demonstrate a specific volumetric capacitance of 199 F cm at 2 mV s . Fabricated FMSCs also deliver an ultrahigh energy density of 27.3 mWh cm , the highest among those reported for FMSCs to date. Furthermore, integrating 20 pieces of FMSCs with two commercial flexible solar cells as a self-powering energy system, a light-emitting diode panel can be lit up stably. The current work highlights the excellent potential of nano-RuO -decorated HrGO composite fibers for constructing micro-supercapacitors with high energy density for wearable electronic devices.

show abstract

Section: Resultsmentioning

confidence: 99%

Nano‐RuO₂‐Decorated Holey Graphene Composite Fibers for Micro‐Supercapacitors with Ultrahigh Energy Density

Zhai

Wang

Karahan

et al. 2018

Small

122

View full text Add to dashboard Cite

show abstract

Section: Synthesis Strategymentioning

confidence: 99%

“…For the present study, SnO 2 nanospheres were prepared via the microwave irradiation process and nanopyramids via the hydrothermal process with minor modifications. Wan et al studied a rapid and simple method for the preparation of oxygen vacancies in various metal oxides via the method of microwave combustion inducing carbon reduction. During the microwave heating, these materials could be heated quickly and cooled to room temperature in a few seconds.…”

Section: Synthesis Strategymentioning

confidence: 99%

“…Similar to lithium‐ion batteries (LIBs), oxygen defects greatly improve the electrochemical performance of SIBs. Rechargeable lithium–oxygen (Li–O 2 ) batteries with nonaqueous electrolytes have been a focus of research in recent years due to their extremely high energy densities, which offer great possibilities for application as storage units in electric vehicles and application in electrical grids . Some developments regarding oxygen‐vacant materials, selected from the past years, are demonstrated in Figure .…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Synthesis and Progress of New Oxygen‐Vacant Electrode Materials for High‐Energy Rechargeable Battery Applications

Wang

Xiao

et al. 2018

Small

View full text Add to dashboard Cite

During the last few years, a great amount of oxygen-vacant materials have been synthetized and applied as electrodes for electrochemical storage. The presence of oxygen vacancies leads to an increase in the conductivity and the diffusion coefficient; consequently, the controllable synthesis of oxygen vacancy plays an important role in improving the electrochemical performance, including achieving high specific capacitance, high power density, high energy density, and good cycling stability of the electrode materials for batteries. This review mainly focuses on research progress in the preparation of oxygen-vacant nanostructures and the application of materials with oxygen vacancies in various batteries (such as lithium-ion, lithium-oxygen, and sodium-ion batteries). Challenges related to and opportunities for oxygen-vacant materials are also provided.

show abstract

Structure Confined Porous Mo₂C for Efficient Hydrogen Evolution

Wan

Gao

et al. 2017

Adv Funct Materials

Self Cite

175

View full text Add to dashboard Cite

Molybdenum carbide (Mo 2 C) has been widely applied in energy conversion, electrocatalysis, and other electronic devices, but its nanostructure with certain morphology and porous structure is tough to control. In this work, 1D or 2D porous Mo 2 C nanostructures can be synthesized by carburizing cobalt-based zeolitic imidazolate framework (ZIF-67) cladding MoO 3 nanowires or nanosheets hybrid structure under high temperature. The obtained 2D porous Mo 2 C shows a low onset overpotential (η = 25 and 36 mV) and a small Tafel slope (40 and 47 mV dec −1 ) in 0.1 m HClO 4 and 0.1 m KOH as well as great stability. This work highlights a new strategy for the design and synthesis of porous nanostructure Mo 2 C electrocatalysts. and 1D nanowires. The approach is through carburizing cobalt or zinc-based zeolite-type metal-organic framework (MOF) (ZIF-67 or ZIF-8) cladding MoO 3 nanosheets or nanowires under high temperature. The resulting nanostructures are periodically porous, largely preserving the precursor morphology. The porous Mo 2 C materials may provide an exceptionally large number of active sites. For instance, 2D Mo 2 C nanosheets may show excellent catalytic performance for hydrogen evolution over a broad range of pH value (0.1 m HClO 4 and 0.1 m KOH), including a low onset overpotential (η = 25 and 36 mV vs RHE), a small Tafel slope (40 and 47 mV dec −1 ), and remarkable stability.

show abstract

Microwave Combustion for Modification of Transition Metal Oxides

Cited by 49 publications

References 63 publications

Nano‐RuO₂‐Decorated Holey Graphene Composite Fibers for Micro‐Supercapacitors with Ultrahigh Energy Density

Nano‐RuO₂‐Decorated Holey Graphene Composite Fibers for Micro‐Supercapacitors with Ultrahigh Energy Density

Synthesis and Progress of New Oxygen‐Vacant Electrode Materials for High‐Energy Rechargeable Battery Applications

Structure Confined Porous Mo₂C for Efficient Hydrogen Evolution

Contact Info

Product

Resources

About

Microwave Combustion for Modification of Transition Metal Oxides

Cited by 49 publications

References 63 publications

Nano‐RuO2‐Decorated Holey Graphene Composite Fibers for Micro‐Supercapacitors with Ultrahigh Energy Density

Nano‐RuO2‐Decorated Holey Graphene Composite Fibers for Micro‐Supercapacitors with Ultrahigh Energy Density

Synthesis and Progress of New Oxygen‐Vacant Electrode Materials for High‐Energy Rechargeable Battery Applications

Structure Confined Porous Mo2C for Efficient Hydrogen Evolution

Contact Info

Product

Resources

About

Nano‐RuO₂‐Decorated Holey Graphene Composite Fibers for Micro‐Supercapacitors with Ultrahigh Energy Density

Nano‐RuO₂‐Decorated Holey Graphene Composite Fibers for Micro‐Supercapacitors with Ultrahigh Energy Density

Structure Confined Porous Mo₂C for Efficient Hydrogen Evolution