期刊
JOURNAL OF POWER SOURCES
卷 195, 期 24, 页码 8258-8266出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2010.06.114
关键词
In situ neutron diffraction; Lithium-ion battery; Graphite; Lithium cobalt oxide; Structural change
资金
- Universiti Technologi MARA
- ANSTO
- Academy of Science, Malaysia [P.20c]
- CLEON Technologies Sdn Bhd
The structural response to electrochemical cycling of the components within a commercial Li-ion battery (LiCoO2 cathode, graphite anode) is shown through in situ neutron diffraction. Lithuim insertion and extraction is observed in both the cathode and anode. In particular, reversible Li incorporation into both layered and spinel-type LiCoO2 phases that comprise the cathode is shown and each of these components features several phase transitions attributed to Li content and correlated with the state-of-charge of the battery. At the anode, a constant cell voltage correlates with a stable lithiated graphite phase. Transformation to de-lithiated graphite at the discharged state is characterised by a sharp decrease in both structural cell parameters and cell voltage. In the charged state, a two-phase region exists and is composed of the lithiated graphite phase and about 64% LiC6. It is postulated that trapping Li in the solid electrolyte interface layer results in minimal structural changes to the lithiated graphite anode across the constant cell voltage regions of the electrochemical cycle. (C) 2010 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