Novel sponge-like N-doped graphene film as high-efficiency electrode for Li-ion battery
Abstract
The novel sponge-like N-doped reduced graphene oxide films (N-rGO) were synthesized successfully via a facile one-step route at 800 °C. The as-prepared films are few-layer and have loose sponge-like structure between layers and the N-doping content can reach to 7.11% and C/O is 17:1. As an anode material of Li-ion battery (LiBs), the as-prepared N-rGO flim exhibit excellent electrochemical properties. It delivers an initial discharge capacity of 1673 mAh g-1 and the reversible specific discharge capacity of 906 mAh g-1 at the current density of 100 mA g-1. Even at the current density of 1.6 A g-1, the reversible specific capacity still could remain at 346 mAh g-1 after 500 cycles. The appearance of N-doping microstructure of rGO with a high content and loose sponge-like framework might be applied to explain thus enhanced electrochemical properties.
- Publication:
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Applied Surface Science
- Pub Date:
- August 2019
- DOI:
- 10.1016/j.apsusc.2019.04.209
- Bibcode:
- 2019ApSS..485..529L
- Keywords:
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- Nitrogen doped graphene;
- Film;
- Loose porous structure;
- Lithium-ion battery