Graphene Quantum Dots-Shielded Na3(VO)2(PO4)2F@C Nanocuboids as Robust Cathode for Na-Ion Battery Original Research Article Energy Storage Materials, Available online 28 July 2016, Pages Gang Deng, Dongliang Chao, Yuwei Guo, Zhen Chen, Huanhuan Wang, Serguei V. Savilov, Jianyi Lin, Ze Xiang Shen
Graphical abstractGraphene quantum dots anchored [001]-oriented Na3(VO)2(PO4)2F@C nanocuboid was successful synthesized which is a high-performance positive electrode for Na-ion storage. The findings highlight the synergetic effect of oriented-crystallinity, morphology control and surface modification to fast kinetics and long-term stability.

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