Fabrication and performance of Li 4 Ti 5 O 12 /C Li-ion battery electrodes using combined double flame spray pyrolysis and pressure-based lamination technique

Gockeln, Michael; Pokhrel, Suman; Meierhofer, Florian; Glenneberg, Jens; Schowalter, Marco; Rosenauer, A.; Fritsching, Udo; Busse, Matthias; Mädler, Lutz; Kun, Róbert

doi:10.1016/j.jpowsour.2017.11.016

Cited by 72 publications

(46 citation statements)

References 74 publications

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“…Figure 9 B shows that the average pore size and the standard deviation of the pore size measurements increased with pressure, which could be due to possible damage of the PVDF nanofibers under high pressure. Gockeln et al [ 44 ] investigated the influence of laminating pressures on the microstructure and electrochemical performance of the lithium-ion battery electrodes. The results indicated that all the laminated samples showed highly porous and homogeneous networks, while the pore size slightly decreased with an increase in laminating pressure.…”

Section: Resultsmentioning

confidence: 99%

Effect of Laminating Pressure on Polymeric Multilayer Nanofibrous Membranes for Liquid Filtration

Yalçinkaya

Hrůza

2018

Nanomaterials

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In the new century, electrospun nanofibrous webs are widely employed in various applications due to their specific surface area and porous structure with narrow pore size. The mechanical properties have a major influence on the applications of nanofiber webs. Lamination technology is an important method for improving the mechanical strength of nanofiber webs. In this study, the influence of laminating pressure on the properties of polyacrylonitrile (PAN) and polyvinylidene fluoride (PVDF) nanofibers/laminate was investigated. Heat-press lamination was carried out at three different pressures, and the surface morphologies of the multilayer nanofibrous membranes were observed under an optical microscope. In addition, air permeability, water filtration, and contact angle experiments were performed to examine the effect of laminating pressure on the breathability, water permeability and surface wettability of multilayer nanofibrous membranes. A bursting strength test was developed and applied to measure the maximum bursting pressure of the nanofibers from the laminated surface. A water filtration test was performed using a cross-flow unit. Based on the results of the tests, the optimum laminating pressure was determined for both PAN and PVDF multilayer nanofibrous membranes to prepare suitable microfilters for liquid filtration.

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Section: Resultsmentioning

confidence: 99%

Effect of Laminating Pressure on Polymeric Multilayer Nanofibrous Membranes for Liquid Filtration

Yalçinkaya

Hrůza

2018

Nanomaterials

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“…The relationship between loading mass of active materials and prices of corresponding supporting matrixes for binder‐free electrodes in LIBs. [ 48–109,141–240 ] ...…”

Section: Applications Of Binder‐free Nanostructured Electrodes For Fumentioning

confidence: 99%

Advanced Matrixes for Binder‐Free Nanostructured Electrodes in Lithium‐Ion Batteries

et al. 2020

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Commercial lithium‐ion batteries (LIBs), limited by their insufficient reversible capacity, short cyclability, and high cost, are facing ever‐growing requirements for further increases in power capability, energy density, lifespan, and flexibility. The presence of insulating and electrochemically inactive binders in commercial LIB electrodes causes uneven active material distribution and poor contact of these materials with substrates, reducing battery performance. Thus, nanostructured electrodes with binder‐free designs are developed and have numerous advantages including large surface area, robust adhesion to substrates, high areal/specific capacity, fast electron/ion transfer, and free space for alleviating volume expansion, leading to superior battery performance. Herein, recent progress on different kinds of supporting matrixes including metals, carbonaceous materials, and polymers as well as other substrates for binder‐free nanostructured electrodes in LIBs are summarized systematically. Furthermore, the potential applications of these binder‐free nanostructured electrodes in practical full‐cell‐configuration LIBs, in particular fully flexible/stretchable LIBs, are outlined in detail. Finally, the future opportunities and challenges for such full‐cell LIBs based on binder‐free nanostructured electrodes are discussed.

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“…Targeting the Fischer-Tropsch process as part of the GTL route towards cleaner fuels, a double flame spray pyrolysis technique was demonstrated to offer individual control over the properties of the catalyst and support materials, providing an alumina-supported cobalt catalyst that showed promising performance [56] . Gockeln et al [57] have used a similar approach to synthesize in-situ carbon-coated Li 4 Ti 5 O 12 (LTO) nanoparticles as electrode materials for lithium ion batteries, important in electromobility and large-scale energy storage. Again, the flexible operation of the double flame spray pyrolysis technique enabled control over the process by individually addressing the LTO nanoparticle size and their surface modification.…”

Section: Setting the Stage: Combustion And Chemistry In Contextmentioning

confidence: 99%

Combustion in the future: The importance of chemistry

Kohse‐Höinghaus

2021

Proceedings of the Combustion Institute

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Combustion involves chemical reactions that are often highly exothermic. Combustion systems utilize the energy of chemical compounds released during this reactive process for transportation, to generate electric power, or to provide heat for various applications. Chemistry and combustion are interlinked in several ways. The outcome of a combustion process in terms of its energy and material balance, regarding the delivery of useful work as well as the generation of harmful emissions, depends sensitively on the molecular nature of the respective fuel. The design of efficient, low-emission combustion processes in compliance with air quality and climate goals suggests a closer inspection of the molecular properties and reactions of conventional, bio-derived, and synthetic fuels. Information about flammability, reaction intensity, and potentially hazardous combustion by-products is important also for safety considerations. Moreover, some of the compounds that serve as fuels can assume important roles in chemical energy storage and conversion. Combustion processes can furthermore be used to synthesize materials with attractive properties. A systematic understanding of the combustion behavior thus demands chemical knowledge. Desirable information includes properties of the thermodynamic states before and after the combustion reactions and relevant details about the dynamic processes that occur during the reactive transformations from the fuel and oxidizer to the products under the given boundary conditions. Combustion systems can be described, tailored, and improved by taking chemical knowledge into account. Combining theory, experiment, model development, simulation, and a systematic analysis of uncertainties enables qualitative or even quantitative predictions for many combustion situations of practical relevance. This article can highlight only a few of the numerous investigations on chemical processes for combustion and combustion-related science and applications, with a main focus on gas-phase reaction systems. It attempts to provide a snapshot of recent progress and a guide to exciting opportunities that drive such research beyond fossil combustion.

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Fabrication and performance of Li 4 Ti 5 O 12 /C Li-ion battery electrodes using combined double flame spray pyrolysis and pressure-based lamination technique

Cited by 72 publications

References 74 publications

Effect of Laminating Pressure on Polymeric Multilayer Nanofibrous Membranes for Liquid Filtration

Effect of Laminating Pressure on Polymeric Multilayer Nanofibrous Membranes for Liquid Filtration

Advanced Matrixes for Binder‐Free Nanostructured Electrodes in Lithium‐Ion Batteries

Combustion in the future: The importance of chemistry

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