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Boosting High‐Rate Sodium Storage Performance of N‐Doped Carbon‐Encapsulated Na 3 V 2 (PO 4 ) 3 Nanoparticles Anchoring on Carbon Cloth
Author(s) -
Li Wei,
Yao Zhujun,
Zhou Chengao,
Wang Xiuli,
Xia Xinhui,
Gu Changdong,
Tu Jiangping
Publication year - 2019
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201902432
Subject(s) - materials science , cathode , anode , electrode , nanoparticle , carbon fibers , doping , nanotechnology , chemical engineering , conductivity , composite material , optoelectronics , chemistry , composite number , engineering
The further development of high‐power sodium‐ion batteries faces the severe challenge of achieving high‐rate cathode materials. Here, an integrated flexible electrode is constructed by smart combination of a conductive carbon cloth fiber skeleton and N‐doped carbon (NC) shell on Na 3 V 2 (PO 4 ) 3 (NVP) nanoparticles via a simple impregnation method. In addition to the great electronic conductivity and high flexibility of carbon cloth, the NC shell also promotes ion/electron transport in the electrode. The flexible NVP@NC electrode renders preeminent rate capacities (80.7 mAh g −1 at 50 C for cathode; 48 mAh g −1 at 30 C for anode) and superior cycle performance. A flexible symmetric NVP@NC//NVP@NC full cell is endowed with fairly excellent rate performance as well as good cycle stability. The results demonstrate a powerful polybasic strategy design for fabricating electrodes with optimal performance.