In situ neutron radiography of lithium-ion batteries:: the gas evolution on graphite electrodes during the charging

被引：83

作者：

Goers, D ^{[1
]}

Holzapfel, M ^{[1
]}

Scheifele, W ^{[1
]}

Lehmann, E ^{[1
]}

Vontobel, P ^{[1
]}

Novák, P ^{[1
]}

机构：

[1] Paul Scherrer Inst, CH-5232 Villigen, Switzerland

来源：

JOURNAL OF POWER SOURCES | 2004年 / 130卷 / 1-2期

关键词：

neutron radiography; lithium-ion batteries; graphite electrodes;

D O I：

10.1016/j.jpowsour.2003.11.065

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

In situ neutron radiography (NR) was used to study the gas evolution on graphite electrodes in lithium-ion cells containing different PVDF-based gel-type electrolytes. The amount of gas bubbles and channels was calculated by image analysis. Gas production was extremely high in the case of the electrolyte containing ethylene carbonate (EC) and propylene carbonate (PC) (2:3, w/w), 1 M LiClO4. About 60% of the electrode surface consisted of the gas phase which resulted in an inhomogeneous local current distribution. In contrast, the electrolyte containing EC and gamma-butyrolactone (GBL) (1: 1, w/w), I M LiBF4 only showed a small increase of the gas volume between the electrodes of about 3%. In situ NR also revealed the displacement of the electrolyte due to gas evolution and volume changes of the electrodes. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：221 / 226

页数：6

共 14 条

[1]

Operation and development of the new spallation neutron source SINQ at the Paul Scherrer Institut [J].