【摘 要】
：
An Al-doped spinel lithium manganese oxide was prepared by the adipic acid-assisted sol-gel method at 800℃, and the cathode materials (LiAl0.05Mn1.95O4) with d
【机 构】
：
Department of Applied Chemistry, Harbin Institute of Technology, Harbin 150001, China;School of Chem
论文部分内容阅读
An Al-doped spinel lithium manganese oxide was prepared by the adipic acid-assisted sol-gel method at 800℃, and the cathode materials (LiAl0.05Mn1.95O4) with different particle sizes were obtained through ball milling. The effects of particle size on the electrochemical performance of LiAl0.05Mn1.95O4 samples were investigated by differential thermal analysis and thermogravimetry, X-ray diffraction, galvanostatic charge-discharge test, cyclic voltammetry, and electrochemical impedance spectroscopy. The results indicate that all samples with different particle sizes show the same pure spinel phase and good crystal structure; LiAl0.05Mn1.95O4 with D50 = 17.3 μm shows better capacity retention; LiAl0.05Mn1.95O4 cathode materials with small particle size have a bigger resistance of charge transfer than the large one, and the particle size has significant effects on the electrochemical performance of Al-doped spinel LiMn2O4 cathode materials.
其他文献
New TiAl alloys, containing 45 at.% Al, 7 at.% Nb, x at.% W, and 0.15 at.% B (x = 0, 0.2, 0.4, and 0.7) were prepared by arc melting and drop casting consequent
在教学过程中要灵活运用多媒体辅助数学教学,不但能突破时空的限制,帮助学生直观地理解数学知识,而且能活跃课堂气氛,使数学课上得更生动、更活泼,提高课堂教学效率。
To us
作为现代新儒学的主要代表人物之一,方东美的哲学思想统贯中西,容纳百家,对于中国哲学的研究与重建另辟蹊径。“生命”是方东美哲学思想一以贯之的核心概念,他以“生命”为本
改革开放以来,随着全球化和高科技的发展,我国在社会主义市场经济领域取得了很大的成就。然而,随着改革开放和社会主义现代化建设的深入,马克思主义信仰面临着来自各个领域的
克尔凯郭尔基督教思想的背景是启蒙以来的人文主义传统。他的基督教思想探讨如下核心问题：个体如何去成为一个基督徒。生存的个体性使得一个人的基督徒身份和一个人的生存问题
大赖草7Lr#1S染色体上携带赤霉病抗性基因,将其导入普通小麦有助于增加赤霉病抗源多样性和选育抗赤霉病品种。利用染色体C-分带、荧光原位杂交和分子标记技术从普通小麦–大
朗读是感悟的前提和基础,感悟是在朗读基础上的发展和升华,二者是相辅相成、相互促进的关系。盲生虽然有视力缺陷,但内心情感细腻。特殊教育学校的语文教师,应在教学中引导和
本文通过对餐饮服务技能课程性质、定位、作用的分析,基于职业活动导向与项目载体、以学生为主体、突出能力训练、“产教融合、校企合作”、理实一体的设计理念,提出了以工作
宝应县地处苏中里下河地区北部,生产上以稻麦两熟为主,是一个稻麦两熟双高产地区。水稻品种以迟熟中粳稻为主,常年种植水稻5.9万hm2,产量水平9 500kg/hm2。为进一步提高水稻
该文从挂篮荷载计算、施工流程、支座及临时固结施工、挂篮安装及试验、合拢段施工、模板制作安装、钢筋安装、混凝土的浇筑及养生、测量监控等方面人手,介绍了S226海滨大桥