Interconnected Bi <sub>5</sub> Nb <sub>3</sub> O <sub>15</sub> @CNTs network as high‐performance anode materials of Li‐ion battery
Xuezhong Li, Nan Zhang, Yurong Wu, Qinzhi Lai, Yan‐Rong Zhu, Junhong Zhang, Ping Cui, Ting‐Feng Yi
Abstract
Abstract In this work, the facile carbon nanotubes (CNTs) modulation strategy was successfully used to fabricate Bi 5 Nb 3 O 15 @CNTs composites as anode materials for lithium‐ion battery by a simple solid‐state route. The introduction of CNTs does not change the structure of the Bi 5 Nb 3 O 15 materials, the Bi 5 Nb 3 O 15 particles are decorated on a three‐dimensional CNTs network, and the high conductive network promotes transfer of electron/ion and relieve the volume change of Bi 5 Nb 3 O 15 . The Bi 5 Nb 3 O 15 @CNTs (8 wt%) electrode shows a superior rate capability with charge(discharge) capacities of 490(898.7), 379.1(401.6), 311.3(326.9), 276.5(285.5) and 243.4(252) mAh·g −1 at 50, 100, 200, 300 and 500 mA·g −1 , respectively. However, the Bi 5 Nb 3 O 15 only shows charge(discharge) capacities of 431(772.6), 278.6(309.9), 193.1(213.7), 160.8(171.1), 129.9(139.1) mAh·g −1 at the corresponding rates, respectively. The excellent rate capability of Bi 5 Nb 3 O 15 @CNTs can be ascribed to the homogeneous distribution of Bi 5 Nb 3 O 15 particles in the CNTs conductive network and the enhancement of conductivity. Hence, the CNTs modulation can be considered as an effective strategy to enhance electrochemical performances of Bi 5 Nb 3 O 15 materials.