posted on 2020-12-24, 18:36authored byPeng Hei, Shanshan Luo, Kuo Wei, Junshuang Zhou, Yufeng Zhao, Faming Gao
For
the past few years, intercalation-type niobium-based oxides
have attracted tremendous attention due to their excellent electrochemical
performance, but their rate performance and stability still need to
be improved. Here, we synthesized P4Nb2O15 by a simple solvothermal method, used it as anode material
in lithium-ion batteries for the first time, and further prepared
P4Nb2O15@CNTs on the basis of previous
research. The results indicated that P4Nb2O15@CNTs delivered a high reversible lithium storage capacity
(563.3 mAh g–1 at 0.1C), with excellent rate performance
(115.9 mAh g–1 at a high rate of 50C) and outstanding
cycle performance of 0.0178% of capacity lost per cycle after 500
cycles at 10C. Moreover, it showed a significant interlayer pseudocapacitive
contribution of 88.5% at 1.0 mV s–1. All of these
advantages indicate that P4Nb2O15@CNTs have a wide application prospect as anode material in lithium-ion
batteries.