LiNi0.5Mn1.5O4的声化学合成及其作为5V锂离子电池正极材料的电化学性能

Sonochemical synthesis of LiNi0.5Mn1.5O4 and its electrochemical performance as a cathode material for 5 V Li-ion batteries.

作者信息

Sivakumar P, Nayak Prasant Kumar, Markovsky Boris, Aurbach Doron, Gedanken Aharon

机构信息

Department of Chemistry, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel.

Department of Chemistry, Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 52900, Israel; National Cheng Kung University, Department of Materials Science & Engineering, Tainan 70101, Taiwan.

出版信息

Ultrason Sonochem. 2015 Sep;26:332-339. doi: 10.1016/j.ultsonch.2015.02.007. Epub 2015 Feb 25.

DOI:10.1016/j.ultsonch.2015.02.007

PMID:25748990

Abstract

LiNi0.5Mn1.5O4 was synthesized as a cathode material for Li-ion batteries by a sonochemical reaction followed by annealing, and was characterized by XRD, SEM, HRTEM and Raman spectroscopy in conjunction with electrochemical measurements. Two samples were prepared by a sonochemical process, one without using glucose (sample-S1) and another with glucose (sample-S2). An initial discharge specific capacity of 130 mA h g(-1) is obtained for LiNi0.5Mn1.5O4 at a relatively slow rate of C/10 in galvanostatic charge-discharge cycling. The capacity retention upon 50 cycles at this rate was around 95.4% and 98.9% for sample-S1 and sample-S2, respectively, at 30°C.

摘要

通过声化学反应随后进行退火合成了LiNi0.5Mn1.5O4作为锂离子电池的阴极材料，并通过X射线衍射（XRD）、扫描电子显微镜（SEM）、高分辨率透射电子显微镜（HRTEM）和拉曼光谱结合电化学测量对其进行了表征。通过声化学方法制备了两个样品，一个不使用葡萄糖（样品-S1），另一个使用葡萄糖（样品-S2）。在恒电流充放电循环中，以相对较慢的C/10速率对LiNi0.5Mn1.5O4进行测试，其初始放电比容量为130 mA h g(-1)。在30°C下，以该速率进行50次循环后，样品-S1和样品-S2的容量保持率分别约为95.4%和98.9%。