title: Core/Double-Shell Structured Na3V2(PO4)2F3@C Nanocomposite as the High Power and Long Lifespan Cathode for Sodium-Ion Batteries.
abstract: NASICON-structured Na3V2(PO4)2F3is considered as a potentially high-capacity cathode material for Na-ion batteries; however, its poor rate capability and insufficient cyclability remain a challenge for battery applications. To address this issue, we designed and successfully synthesized a core/double-shell structured Na3V2(PO4)2F3@C nanocomposite (Na3V2(PO4)2F3@CD) by in situ carbon coating and embedding the Na3V2(PO4)2F3nanoparticles in ordered mesoporous carbon framework. Benefiting from the sufficient electrochemically available interfaces and abundant electronic/ionic pathways, this Na3V2(PO4)2F3@CDmaterial demonstrated superior Na+-storage performance with a high reversible capacity of 120 mA h g-1at a moderate current of 1 C, a strong high-rate capability with 63 mA h g-1at an extremely high rate of 100 C, and a long-cycle lifespan with 65% capacity retention over 5000 cycles. These superior electrochemical performances remained stable when the Na3V2(PO4)2F3@CDcathode was used in a full cell, suggesting a promising application of the material for high rate and long lifespan sodium-ion batteries. Moreover, the architectural design and synthetic method developed in this work may provide a new avenue to create high performance Na+-host materials for a wide range of electric energy storage applications.
authors: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics and ‡State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, People's Republic of China.
authors: Qiang
authors: Q
authors: Liu
authors: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics and ‡State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, People's Republic of China.
authors: Xing
authors: X
authors: Meng
authors: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics and ‡State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, People's Republic of China.
authors: Zhixuan
authors: Z
authors: Wei
authors: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics and ‡State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, People's Republic of China.
authors: Dongxue
authors: D
authors: Wang
authors: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics and ‡State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, People's Republic of China.
authors: Yu
authors: Y
authors: Gao
authors: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics and ‡State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, People's Republic of China.
authors: Yingjin
authors: Y
authors: Wei
authors: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics and ‡State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, People's Republic of China.
authors: Fei
authors: F
authors: Du
authors: Key Laboratory of Physics and Technology for Advanced Batteries (Ministry of Education), College of Physics and ‡State Key Laboratory of Superhard Materials, Jilin University , Changchun 130012, People's Republic of China.
authors: Gang
authors: G
authors: Chen
keywords: Na3V2(PO4)2F3; nanocrystal; ordered mesoporous carbon; superior high rate; ultralong cycle life