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Effects of modification on performance of natural graphite coated by SiO2 for anode of lithium ion batteries YANG Yong(杨 勇), PENG Wen-jie(彭文杰), GUO Hua-jun(郭华军), WANG Zhi-xing(王志兴), LI Xin-hai(李... dioxide film was coated on the surface of natural graphite anode by sol-gel method with Si(OCH2CH3)4, and effects of modification on performance of natural graphite were investigated. The structure......
掺杂SnO2对NiFe2O4陶瓷电导率的影响 段华南1,赖延清1,孙小刚1,张刚1,田忠良1 (1.中南大学冶金科学与工程学院,湖南长沙,410083) 摘要:采用冷压-烧结粉末冶金技术制备了NiFe2O4陶瓷,并对其进行SnO2掺杂.对光谱纯石墨和所制备的试样进行的不同温度下电导率测试研究表明:用直流四端电极法改进的高温电导率测试仪测定结果重现性和准确性良好;NiFe2O4陶瓷材料的导电性能随着温度升高而提高,且呈现半导体材料特性;掺杂少量SnO2有利于降低材料的活化能,提高其电导率,而不影响陶瓷基体材料的半导体特性. 关键词:电导率; 掺杂SnO2; NiFe2O4陶瓷; 惰性阳极; [全文内容正在添加中] ......
三维有序大孔SnO2及SnO2/SiO2材料的制备及结构特征 李玉光1,沈勇1,邬泉周1,孙振范1 (1.中山大学化学与化学工程学院,广州,510275) 摘要:以SnCl2·2H2O和正硅酸乙酯为原料,用微球直径为585nm的聚苯乙烯胶晶为模 板,制备了三维有序大孔SnO2和SnO2/SiO2材料.SEM观察表明,直接用SnCl2的乙醇溶 液为前驱物溶液,难以形成有序的大孔结构,加入正硅酸乙酯或将SnCl2溶液转变为氧化物溶 胶,则得到的大孔材料孔结构三维有序排列相当好,孔径为453~500nm,孔与孔之间通过小孔相连.XRD分析表明,大孔材料孔壁由晶粒直径约为17nm SnO2粒子构成. 关键词:聚苯乙烯; 胶晶; 三维有序大孔; SnO2; [全文内容正在添加中] ......
J. Cent. South Univ. Technol. (2010) 17: 1207-1210 DOI: 10.1007/s11771-010-0620-3 Effects of carbon sources on electrochemical performance of Li4Ti5O12/C composite anode materials LIU Ping(刘萍...; anode material; Li4Ti5O12; carbon; electrochemical performance 1 Introduction Over the past few years, a surging demand for portable electronics and hybrid electric vehicles has increased the production......
ARTICLE J. Cent. South Univ. (2019) 26: 1481-1492 DOI: https://doi.org/10.1007/s11771-019-4104-9 Facile synthesis of hierarchically structured manganese oxides as anode for lithium-ion batteries... and CoMn2O4 nanosheets manifest superior lithium-ion storage properties, rendering them promising applications in LIBs and other energy-related fields. Key words: manganese oxides; nanostructures; anode......
J. Cent. South Univ. (2012) 19: 9-16 DOI: 10.1007/s11771-012-0965-x Influence of zinc on electrochemical discharge activity of Mg-6%Al-5%Pb anode WANG Nai-guang(王乃光), WANG Ri-chu(王日初), PENG Chao-qun... anode and makes the average discharge potential of Mg-6%Al-5%Pb anode more negative during galvanostatic test. Mg-6%Al-5%Pb anode with the addition of 1% (mass fraction) zinc has the best......
Ultrasonic-electrodeposited Sn-CNTs composite used as anode material for lithium ion battery LI Chang-ming(李昌明)1, 2, 3, ZHANG Ren-yuan(张仁元)2, LI Wei-shan(李伟善)1 ZHAO Ling-zhi(赵灵智)1, 2, HU She... battery; anode materials; electrodeposition; tin; carbon nanotube 1 Introduction Carbonaceous materials are currently used as anode in commercial lithium ion batteries. With the development of electric......
SnO2(110)表面电子结构的第一性原理 金仁成1,翁雪军2,张五金2,王立鼎1 (1.大连理工大学微系统研究中心,大连,116024;2.大连理工大学精密与特种加工教育部重点实验室,大连,116024) 摘要:应用第一性原理DFT(密度泛函理论)研究了具有(1×1)和(2×1)对称性的SnO2(110)氧化表面,还原表面和缺陷表面的几何结构与电子结构,重点分析了表面氧空穴(O vacancy)对表面电子结构的影响以及对气体分子吸附的影响.研究结果表明,由于表面空穴的存在,SnO2(110)表面能隙中都出现了明显的表面态,由于表面氧的流失而留下来的电荷是产生这些表面态的主要原因,这些电荷主要集中在Sn上和附近的空穴中,与这些电荷相关的轨道是氧化物表面吸附研究的关键. 关键词:SnO2; 密度泛函理论; 电子结构; 能隙; [全文内容正在添加中] ......
Performance of La1-xSrxCr1-yMnyO3-δ anode materials for intermediate temperature solid oxide fuel cell CHEN Xiu-hua(陈秀华)1, MA Wen-hui(马文会)2, 3, YANG Bin(杨 斌)2, 3, DAI Yong-nian(戴永年)2, 3 1..., China; 3. National Engineering Laboratory for Vacuum Metallurgy, Kunming 650093, China Received 15 July 2007; accepted 10 September 2007 Abstract: La1-xSrxCr1-yMnyO3-δ(LSCM) anode materials were......
贵金属对SnO2气敏元件特性的影响 吴江春1 (1.昆明贵金属研究所,云南,昆明,650221) 摘要:SnO2气敏元件近年来在国内外仍进行较多研究,以SnO2为基料并掺入适当的添加剂改善其气敏性能是目前研究的一个热点.作者介绍了近年来通过掺入不同种类的贵金属及控制热处理温度,提高SnO2气敏元件的灵敏度和选择性的工作,并探讨了添加剂对SnO2气敏元件特性的作用机理. 关键词:传感器技术; 贵金属; 二氧化锡; 气敏特性; [全文内容正在添加中] ......