High Rate, Long Lifespan LiV 3 O 8 Nanorods as a Cathode Material for Lithium‐Ion Batteries

作者：Zhongxue Chen, Fei Xu, Shunan Cao, Zhengfeng Li, Hanxi Yang, Xinping Ai, Yuliang Cao · 发表于：Small · 年份：2017 · DOI：10.1002/smll.201603148 · 被引用次数：77 · 研究领域：Advancements in Battery Materials、Advanced battery technologies research、Advanced Battery Technologies Research

LiV 3 O 8 nanorods with controlled size are successfully synthesized using a nonionic triblock surfactant Pluronic‐F127 as the structure directing agent. X‐ray diffraction, scanning electron microscopy, and transmission electron microscopy techniques are used to characterize the samples. It is observed that the nanorods with a length of 4–8 µm and diameter of 0.5–1.0 µm distribute uniformly. The resultant LiV 3 O 8 nanorods show much better performance as cathode materials in lithium‐ion batteries than normal LiV 3 O 8 nanoparticles, which is associated with the their unique micro–nano‐like structure that can not only facilitate fast lithium ion transport, but also withstand erosion from electrolytes. The high discharge capacity (292.0 mAh g −1 at 100 mA g −1 ), high rate capability (138.4 mAh g −1 at 6.4 A g −1 ), and long lifespan (capacity retention of 80.5% after 500 cycles) suggest the potential use of LiV 3 O 8 nanorods as alternative cathode materials for high‐power and long‐life lithium ion batteries. In particular, the synthetic strategy may open new routes toward the facile fabrication of nanostructured vanadium‐based compounds for energy storage applications.