TY - JOUR
T1 - Confined Growth of Nano-Na 3 V 2 (PO 4 ) 3 in Porous Carbon Framework for High-Rate Na-Ion Storage
AU - Zhu, Qizhen
AU - Chang, Xiaqing
AU - Sun, Ning
AU - Chen, Renjie
AU - Zhao, Yineng
AU - Xu, Bin
AU - Wu, Feng
N1 - Publisher Copyright:
© 2018 American Chemical Society.
PY - 2019/1/23
Y1 - 2019/1/23
N2 - Nanoscale Na 3 V 2 (PO 4 ) 3 particles are grown in the interconnected conductive framework via a simple sol-gel method with the assistance of a hierarchical porous carbon. The porous carbon with strong adsorption ability absorbs the Na 3 V 2 (PO 4 ) 3 reactants from the aqueous solution during the sol-gel process. After crystallization, the Na 3 V 2 (PO 4 ) 3 particles are grown in the carbon pores with a spatially confined effect. Due to the pore size confinement, the Na 3 V 2 (PO 4 ) 3 particles are limited to nanoscale size and prevented from aggregation. Furthermore, the carbon matrix provides the electric conductive framework and the unfilled pores offer interconnected ion transport channels as well as capacitive contribution, which are beneficial for tolerating high current attack. As a result, the pore-confined nano-Na 3 V 2 (PO 4 ) 3 in the carbon framework exhibits high Na-ion storage capacity (116.2 mAh g -1 at 0.2 C), excellent long-term cycling stability (capacity retention of 82.1% after 10 000 cycles), and especially, outstanding high-rate performance (80.1, 60.6, and 45.7 mAh g -1 at 50, 75, and 100 C). The pore-confined nano-Na 3 V 2 (PO 4 ) 3 with superior rate performance is believed to be a promising candidate for Na-ion batteries, and the preparation method based on confined growth in porous carbon framework provides a simple and effective strategy for high-rate electrode material design.
AB - Nanoscale Na 3 V 2 (PO 4 ) 3 particles are grown in the interconnected conductive framework via a simple sol-gel method with the assistance of a hierarchical porous carbon. The porous carbon with strong adsorption ability absorbs the Na 3 V 2 (PO 4 ) 3 reactants from the aqueous solution during the sol-gel process. After crystallization, the Na 3 V 2 (PO 4 ) 3 particles are grown in the carbon pores with a spatially confined effect. Due to the pore size confinement, the Na 3 V 2 (PO 4 ) 3 particles are limited to nanoscale size and prevented from aggregation. Furthermore, the carbon matrix provides the electric conductive framework and the unfilled pores offer interconnected ion transport channels as well as capacitive contribution, which are beneficial for tolerating high current attack. As a result, the pore-confined nano-Na 3 V 2 (PO 4 ) 3 in the carbon framework exhibits high Na-ion storage capacity (116.2 mAh g -1 at 0.2 C), excellent long-term cycling stability (capacity retention of 82.1% after 10 000 cycles), and especially, outstanding high-rate performance (80.1, 60.6, and 45.7 mAh g -1 at 50, 75, and 100 C). The pore-confined nano-Na 3 V 2 (PO 4 ) 3 with superior rate performance is believed to be a promising candidate for Na-ion batteries, and the preparation method based on confined growth in porous carbon framework provides a simple and effective strategy for high-rate electrode material design.
KW - Na-ion batteries
KW - confined growth
KW - nano-Na V (PO )
KW - porous carbon
KW - rate performance
UR - http://www.scopus.com/inward/record.url?scp=85060465238&partnerID=8YFLogxK
U2 - 10.1021/acsami.8b19614
DO - 10.1021/acsami.8b19614
M3 - Article
C2 - 30586273
AN - SCOPUS:85060465238
SN - 1944-8244
VL - 11
SP - 3107
EP - 3115
JO - ACS applied materials & interfaces
JF - ACS applied materials & interfaces
IS - 3
ER -