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Electrospun Carbon/Cu _x O Nanocomposite material as Sustainable and High Performance Anode for Lithium-Ion Batteries.

ABSTRACT: The increase in energy density of the next generation of battery materials to meet the new challenges of the electrical vehicles era calls for innovative and easily scalable materials with sustainable processes. An innovative Cu _x O/C nanocomposite material, characterized by a highly conductive 3D-framework, with Cu _x O/Cu-metal contiguous nanodomains is prepared by electrospinning. The electrode processing is made using a polyacrylic acid binder. The nanocomposite has been fully characterized and the electrochemical performance shows high specific capacity values over 450 galvanostatic cycles at 500 mAg^-1 specific current with capacity retention values over 80?%. In addition, the composite shows remarkable high rate performance and highly stable interface, which has been studied by impedance spectroscopy.

SUBMITTER: Maroni F

PROVIDER: S-EPMC6594352 | biostudies-literature | 2019 Jun

REPOSITORIES: biostudies-literature

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Electrospun Carbon/Cu x O Nanocomposite material as Sustainable and High Performance Anode for Lithium-Ion Batteries.

Maroni Fabio F Bruni Pantaleone P Giuli Gabriele G Brutti S S Croce Fausto F

ChemistryOpen 20190626 6

The increase in energy density of the next generation of battery materials to meet the new challenges of the electrical vehicles era calls for innovative and easily scalable materials with sustainable processes. An innovative Cu x O/C nanocomposite material, characterized by a highly conductive 3D-framework, with Cu x O/Cu-metal contiguous nanodomains is prepared by electrospinning. The electrode processing is made using a polyacrylic acid binder. The nanocomp ...[more]

PMID: 31293870

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Project description:Bagasse-derived carbon electrodes were developed by doping with nitrogen functional groups and compositing with high-capacity MnO2 nanoparticles (MnO2/NBGC). The bagasse-derived biochar was N-doped by refluxing in urea, followed by the deposition of MnO2 nanoparticles onto its porous surface via the hydrothermal reduction of KMnO4. Different initial KMnO4 loading concentrations (i.e. 5, 10, 40, and 100 mM) were applied to optimize the composite morphology and the corresponding electrochemical performance. Material characterization confirmed that the carbon composite has a mesoporous structure along with the dispersion of MnO2 nano-particles on the N-containing carbon surface. It was found that the 5-MnO2/NBGC sample exhibited the highest electrochemical performance with a reversible capacity of 760 mA h g-1 at a current density of 186 mA g-1. It delivered reversible capacities of 488 and 390 mA h g-1 in cycle tests at 372 and 744 mA g-1, respectively, for 150 cycles and presented good reversibility with nearly 100% coulombic efficiency. In addition, it could exert high capacities up to 388 and 301 mA h g-1 even under high current densities of 1860 and 3720 mA g-1, respectively. Moreover, most of the prepared composite products showed high rate capability with great reversibility up to more than 90% after testing at a high current density of 3720 mA g-1. The great electrochemical performance of the MnO2/NBGC nanocomposite electrode can be attributed to the synergistic impact of the hierarchical architecture of the MnO2 nanocrystals deposited on porous carbon and the capacitive effect of the N-containing defects within the carbon material. The nanostructure of the MnO2 particles deposited on porous carbon limits its large volume change during cycling and promotes good adhesion of MnO2 nanoparticles with the substrate. Meanwhile, the capacitive effect of the exposed N-functional groups enables fast ionic conduction and reduces interfacial resistance at the electrode interface.

Dataset Information

Electrospun Carbon/Cu _x O Nanocomposite material as Sustainable and High Performance Anode for Lithium-Ion Batteries.

Publications

Electrospun Carbon/Cu <sub><i>x</i></sub> O Nanocomposite material as Sustainable and High Performance Anode for Lithium-Ion Batteries.

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