Preparation of N-doped reduced graphene oxide/black phosphorus quantum dot composite by low temperature photocatalysis and its performance as anode materials for lithium-ion batteries
Nano black phosphorus/graphene composites have a good application prospect in the field of lithium-ion batteries,but the process of preparing nano black phosphorus/graphene composites is often accompanied by the oxidation of nano black phosphorus,which affects the performance of the prepared nano black phosphorus/graphene composites to a certain extent.In this study,nitrogen-doped graphene/black phosphorus quantum dots(N-rGO/BPQDs)composites were prepared by low temperature photocatalysis under ammonia atmosphere using nano black phosphorus as phosphorus source,and cheap and readily available graphene oxide as carbon source.FTIR,Raman,XPS and SEM characterization results showed that the oxidation degree of nano-black phosphorus based materials prepared by the above method was low.The results of constant current charge-discharge test indicated that the initial reversible specific capacity of N-rGO/BPQDs composites at 0.1 A/g current density was 620mA·h/g.After 100 cycles,the reversible specific capacity of 450mA·h/g was still maintained,which was higher than the theoretical specific capacity of graphite anode materials(372mA·h/g).
black phosphorus quantum dotsgraphene oxidelow temperature photocatalysisN-rGO/BPQDs compositeslithium ion batteries
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