作为高性能锂离子电池先进阴极的五氧化二钒空心球的简易合成

Facile Synthesis of V₂O₅ Hollow Spheres as Advanced Cathodes for High-Performance Lithium-Ion Batteries.

作者信息

Zhang Xingyuan, Wang Jian-Gan, Liu Huanyan, Liu Hongzhen, Wei Bingqing

机构信息

State Key Laboratory of Solidification Processing, Center for Nano Energy Materials, School of Materials Science and Engineering, Northwestern Polytechnical University and Shaanxi Joint Lab of Graphene (NPU), Xi'an 710072, China.

Department of Mechanical Engineering, University of Delaware, Newark, DE 19716, USA.

出版信息

Materials (Basel). 2017 Jan 18;10(1):77. doi: 10.3390/ma10010077.

DOI:10.3390/ma10010077

PMID:28772435

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5344582/

Abstract

Three-dimensional V₂O₅ hollow structures have been prepared through a simple synthesis strategy combining solvothermal treatment and a subsequent thermal annealing. The V₂O₅ materials are composed of microspheres 2-3 μm in diameter and with a distinct hollow interior. The as-synthesized V₂O₅ hollow microspheres, when evaluated as a cathode material for lithium-ion batteries, can deliver a specific capacity as high as 273 mAh·g at 0.2 C. Benefiting from the hollow structures that afford fast electrolyte transport and volume accommodation, the V₂O₅ cathode also exhibits a superior rate capability and excellent cycling stability. The good Li-ion storage performance demonstrates the great potential of this unique V₂O₅ hollow material as a high-performance cathode for lithium-ion batteries.

摘要

通过结合溶剂热处理和后续热退火的简单合成策略，制备出了三维五氧化二钒空心结构。五氧化二钒材料由直径为2 - 3μm且内部有明显中空的微球组成。所合成的五氧化二钒空心微球，当作为锂离子电池的阴极材料进行评估时，在0.2C的电流密度下可提供高达273 mAh·g的比容量。受益于能够实现快速电解质传输和体积容纳的空心结构，五氧化二钒阴极还表现出优异的倍率性能和出色的循环稳定性。良好的锂离子存储性能证明了这种独特的五氧化二钒空心材料作为高性能锂离子电池阴极具有巨大潜力。