基于梓实的银耳状 Li₃V₂(PO₄)₃/C 复合正极材料的简便合成及其在锂离子电池中的应用。

Facile Synthesis of Tremella-Like Li₃V₂(PO₄)₃/C Composite Cathode Materials Based on Oroxylum for Use in Lithium-Ion Batteries.

机构信息

College of Metallurgy and Materials Engineering, Hunan University of Technology, Zhuzhou 412008, China.

出版信息

J Nanosci Nanotechnol. 2020 Mar 1;20(3):1962-1967. doi: 10.1166/jnn.2020.17361.

DOI:10.1166/jnn.2020.17361

Abstract

Oroxylum as a traditional Chinese medicine, was used as a green and novel bio-template to synthesize tremella-like Li₃V₂(PO₄)₃/C composite (LVPC) cathode materials by adopting a facile immersion method. The microstructures were analyzed by X-ray diffraction analysis, scanning electron microscopy, and transmission electron microscopy. The electrochemical properties were investigated by galvanostatic charge-discharge experiments. The LVPC revealed specific capacity of 95 mAh·g at 1 C rate within potential range of 3.0-4.3 V. After 100 cycles at 0.2 C, the retention of discharge capacity was 96%. The modified electrochemical performance is mainly resulted from the distinct tremella-like structure.

摘要

鸡屎藤作为一种传统中药，被用作一种绿色新颖的生物模板，通过采用简便的浸渍法合成银耳状 Li₃V₂(PO₄)₃/C 复合材料 (LVPC) 正极材料。通过 X 射线衍射分析、扫描电子显微镜和透射电子显微镜对微结构进行了分析。通过恒流充放电实验研究了电化学性能。LVPC 在 3.0-4.3 V 的电位范围内以 1 C 速率显示出 95 mAh·g 的比容量。在 0.2 C 下循环 100 次后，放电容量保持率为 96%。改进的电化学性能主要归因于明显的银耳状结构。