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Designed One‐Pot Strategy for Dual‐Carbon‐Protected Na 3 V 2 (PO 4 ) 3 Hybrid Structure as High‐Rate and Ultrastable Cathode for Sodium‐Ion Batteries
Author(s) -
Li Jie,
Peng Bo,
Li Yapeng,
Yu Lai,
Wang Gongrui,
Shi Liang,
Zhang Genqiang
Publication year - 2019
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201902400
Subject(s) - cathode , materials science , electrochemistry , lithium (medication) , carbon fibers , nanoparticle , energy storage , ion , chemical engineering , nanotechnology , electrode , composite material , chemistry , physics , composite number , medicine , power (physics) , organic chemistry , quantum mechanics , engineering , endocrinology
Sodium‐ion batteries have attracted tremendous attention due to their much lower cost and similar working principle compared with lithium‐ion batteries, which have been invited great expectation as energy storage devices in grid‐level applications. The sodium superionic conductor Na 3 V 2 (PO 4 ) 3 has been considered as a promising cathode candidate; however, its intrinsic low electronic conductivity results in poor rate performance and unsatisfactory cycling performance, which severely impedes its potential for practical applications. Herein, we developed a facile one‐pot strategy to construct dual carbon‐protected hybrid structure composed of carbon coated Na 3 V 2 (PO 4 ) 3 nanoparticles embedded with carbon matrix with excellent rate performance, superior cycling stability and ultralong lifespan. Specifically, it can deliver an outstanding rate performance with a 51.5 % capacity retention from 0.5 to 100 C and extraordinary cycling stability of 80.86 % capacity retention after 6000 cycles at the high rate of 20 C. The possible reasons for the enhanced performance could be understood as the synergistic effects of the strengthened robust structure, facilitated charge transfer kinetics, and the mesoporous nature of the Na 3 V 2 (PO 4 ) 3 hybrid structure. This work provides a cost‐effective strategy to effectively optimize the electrochemical performance of a Na 3 V 2 (PO 4 ) 3 cathode, which could contribute to push forward the advance of its practical applications.