期刊
JOURNAL OF POWER SOURCES
卷 216, 期 -, 页码 249-255出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jpowsour.2012.05.061
关键词
Lithium batteries; Layered cathode material; Lithium manganese oxide; Metal hydride; Anomalous capacity; Li2MnO3
资金
- Japan Synchrotron Radiation Research Institute (JASRI) [2010B1693, 2011A1612]
- Grants-in-Aid for Scientific Research [22245035] Funding Source: KAKEN
Oxygen-deficient Li2MnO3-x (0 < x < 0.19) have been directly synthesized from lithium-rich manganese oxide. Li2MnO3, using metal hydrides (CaH2 and LiH) as reducing agents at reaction temperatures of 255-265 degrees C. The structure of the reduced phase determined by X-ray diffraction experiments has oxygen vacancies in the layered structure, causing slightly larger lattice parameters than the stoichiometric Li2MnO3. Reversible oxygen insertion and extraction from the deficient structure observed by the TG measurements suggests fast oxygen diffusion in the layered rock-salt structure. The oxygen-deficient phase shows extremely large 1st charge and discharge capacities of 388 and 305 mAh g(-1), respectively. (C) 2012 Elsevier BAP. 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