期刊
JOURNAL OF POWER SOURCES
卷 189, 期 2, 页码 1179-1183出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2008.12.073
关键词
Lithium battery; Current density; Sulfur electrode; Discharge capacity
资金
- Australian Research Council [LP0775456]
- Australian Research Council [LP0775456] Funding Source: Australian Research Council
The influence of current density on the discharge reaction of Li-S batteries is investigated by discharge tests (first discharge curve), differential scanning calorimetry (DSC), X-ray diffraction (XRD) (discharge products), and scanning electron microscopy (the Surface morphology of sulfur electrodes). The first discharge capacity and the plateau potential both decrease with increasing current density. When the Current density is increased from 100 to 1600 mA g(-1) S, the discharge capacity decreases from 1178 to 217 mAh g(-1) S. When the Li-S battery is discharged at low current density, i.e., below 400 mA g(-1) S, elemental sulfur is fully converted to Li2S, which is observable from XRD and DSC data. Only one plateau is observed in the discharge Curve for current densities above 400 mA g(-1) S. Part of the elemental sulfur still remains after discharging at high current densities (over 800 m Ag-1 S). Thus the discharge capacity at high current density is smaller than that at low current density due to un-reacted elemental sulfur after discharge. (C) 2008 Elsevier B.V. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据