Flexible Fe3O4 nanoparticles/N-doped carbon nanofibers hybrid film as binder-free anode materials for lithium-ion batteries
Abstract
The energy and power density of lithium-ion batteries (LIBs) can be effectively improved by designing flexible free-standing electrodes. Here, a flexible film composed of Fe3O4 nanoparticles (NPs) embedded in N-doped carbon nanofibers (Fe3O4/NCNFs) was prepared through electrospinning and subsequent annealing process. The Fe3O4/NCNFs film can be directly used as anode materials for LIBs without conductive additive, current collector, and binder. Electrochemical measurement results indicate that the Fe3O4/NCNFs electrode exhibits excellent cycling stability and retains the capacity of 522 mAh g-1 after 200 cycles at 0.1 A g-1. Furthermore, the Fe3O4/NCNFs electrode also shows good rate performance and still obtains a specific capacity of 407 mAh g-1 even at 5 A g-1. The superior electrochemical performance should be attributed to the flexible self-standing characteristic of the electrode and the synergistic effects between 3D conductive NCNFs and Fe3O4 NPs.
- Publication:
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Applied Surface Science
- Pub Date:
- November 2018
- DOI:
- 10.1016/j.apsusc.2018.08.001
- Bibcode:
- 2018ApSS..459..263G
- Keywords:
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- Flexible free-standing;
- Fe<SUB>3</SUB>O<SUB>4</SUB>/C nanofibers;
- Lithium-ion battery;
- Electrochemical performance