High electrochemical performance bendable Li secondary batteries based on a three-dimensional metal foam-type current collector

Song, Kyung Yup; Joo, Seung Ki

doi:10.1016/j.materresbull.2017.06.026

Cited by 4 publications

(2 citation statements)

References 54 publications

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“…Finally, LiFePO 4 /C active material slurries deposited in the pores of foam and then reheated at 130 °C for 8 h under vacuum. 191 High electrochemical performance and mechanical pliability could be attributed to the 3D porous foam type conductive current collector using this flexible LiFePO 4 /C@NiCr cathodes a pouch type battery exhibits a superior electrochemical performance (3.5 mA cm −2 at 0.2C), good capacity retention (94% capacity retained after 50 cycles), and excellent mechanical performance (3.08 mA h cm −2 capacity maintained even after 200 times bending at 0.2C with bending radii of 12.5 and 2.5 mm). Three-dimensional web-like anode materials are fabricated through numerous Li 4 Ti 5 O 12 nanowires directly grown on Ti foil via a facile template-free route, which has been proposed as ultralong-life and high-rate anodes for high-performance flexible LIBs.…”

Section: Metal Mesh/fabric Nanowire and Foam/foil-supported Flexible ...mentioning

confidence: 99%

Review on carbonaceous materials and metal composites in deformable electrodes for flexible lithium-ion batteries

et al. 2021

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Section: Metal Mesh/fabric Nanowire and Foam/foil-supported Flexible ...mentioning

confidence: 99%

Review on carbonaceous materials and metal composites in deformable electrodes for flexible lithium-ion batteries

et al. 2021

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“…Moreover, the metal foam supports the electrode and increases its mechanical stability. Therefore, new electrode designs are possible beyond the boundaries of conventional electrodes; e.g., the electrode can be miniaturized or bent and shaped for specific applications according to the device to be powered [24]. With regard to the requirements for foams used as current collectors, inter alia low mass density of the metal and high open-porosity of the foam as well as good adhesion to the active mass and low cost are important [13].…”

Section: Introductionmentioning

confidence: 99%

Ultra-Thick Cathodes for High-Energy Lithium-Ion Batteries Based on Aluminium Foams—Microstructural Evolution during Densification and Its Impact on the Electrochemical Properties

2023

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Using three-dimensional (3D) metal foams as current collectors is considered to be a promising approach to improve the areal specific capacity and meet the demand for increased energy density of lithium-ion batteries. Electrodes with an open-porous metal foam as current collector exhibit a 3D connected electronic network within the active mass, shortening the electron transport pathways and lowering the electrodes’ intrinsic electronic resistance. In this study, NMC622 cathodes using an aluminium foam as current collector with a measured areal capacity of up to 7.6 mAh cm−2 were investigated. To this end, the infiltrated foams were densified to various thicknesses between 200 µm and 400 µm corresponding to an electrode porosity between 65% and 30%. The microstructural analysis reveals (i) the elimination of shrinking cavities and a decrease in the porosity of the infiltrated active mass, (ii) an improved contact of active mass to the current collector structure and (iii) a pronounced clogging of the surface pores. The electrochemical properties such as capacity and rate capability are correlated to the electrode’s microstructure, demonstrating that densification is necessary to improve active material utilization and volumetric capacity. However, strong densification impairs the rate capability caused by increased pore resistance and hindered electrolyte accessibility.

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From Checkerboard‐Like Sand Barriers to 3D Cu@CNF Composite Current Collectors for High‐Performance Batteries

et al. 2018

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While the architecture, surface morphology, and electrical conductivity of current collectors may significantly affect the performance of electrochemical cells, many challenges still remain in design and cost‐effective fabrication of highly efficient current collectors for a new generation of energy storage and conversion devices. Here the findings in design and fabrication of a 3D checkerboard‐like Cu@CNF composite current collector for lithium‐ion batteries are reported. The surface of the current collector is modified with patterned grooves and amorphous carbon nanofibers, imitating the checkerboard‐like sand barriers in desert regions. Due to a combined effect of the grooves and the carbon nanofibers, a battery based on this current collector retains a reversible capacity of 410.1 mAh g−1 (beyond the theoretical capacity of carbonaceous materials of 372 mAh g−1) with good capacity retention (greater than 84.9% of the initial capacity after 50 cycles), resulting in 66.2% and 42.6% improvement in reversible capacity and capacity retention, respectively, compared to the batteries using traditional Cu current collectors. Based on the excellent electrochemical performance, this composite current collector is believed to be an attractive alternative to the traditional commercially used current collectors for the anode of high‐power energy storage systems.

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High electrochemical performance bendable Li secondary batteries based on a three-dimensional metal foam-type current collector

Cited by 4 publications

References 54 publications

Review on carbonaceous materials and metal composites in deformable electrodes for flexible lithium-ion batteries

Review on carbonaceous materials and metal composites in deformable electrodes for flexible lithium-ion batteries

Ultra-Thick Cathodes for High-Energy Lithium-Ion Batteries Based on Aluminium Foams—Microstructural Evolution during Densification and Its Impact on the Electrochemical Properties

From Checkerboard‐Like Sand Barriers to 3D Cu@CNF Composite Current Collectors for High‐Performance Batteries

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