锂离子电池用石墨烯基纳米复合物的进展

综述了锂离子电池石墨烯(GNS)基纳米复合物电极材料的研究进展,包括活性物质种类、GNS基纳米复合物电极材料的制备方法、微结构特征和主要电化学特性.对GNS基纳米复合物电极材料的研究方向进行了展望.     

稀土对铝和铝合金耐腐蚀性能影响的研究

一、前言用动电位扫描法,测量添加稀土的铝和铝合金在不同介质中的击穿电位研究及其腐蚀性能。研究了添加稀土元素对铝锰和铝镁两种合金体系的小孔腐蚀,均匀腐蚀和大气腐蚀性能的影响。两类不同材料分别在四种不同介质中的腐蚀实验结果表明:添加适量     

Electrochemical Behavior of Nd~(3 ) and Ho~(3 ) in LiCl-KCl Eutectic Melt

ＥｌｅｃｔｒｏｃｈｅｍｉｃａｌＢｅｈａｖｉｏｒｏｆＮｄ３＋ａｎｄＨｏ３＋ｉｎＬｉＣｌＫＣｌＥｕｔｅｃｔｉｃＭｅｌｔＺｈａｏＭｉｎｓｈｏｕ（赵敏寿），ＬｕＸｉａｎｇｐｉｎｇ（吕翔平），ＬｉａｎｇＪｉｎ（梁金）（ＬａｂｏｒａｔｏｒｙｏｆＲａｒｅＥａｒｔ...     

稀土6063变形铝合金的机械性能及抗氧化性能研究

对添加有稀土的6063变形铝合金进行了抗氧化性能与机械性能的研究。结果表明,与不加稀土的相此,200～800℃氧化增重降低28％左右,热膨胀伸长率降低4～16％,抗拉强度与硬度提高,延伸率基本无变化。稀土含量以0.15～0.30％为宜,过量将会降低各项性能。     

稀土LD31变形铝合金的研制

LD31铝镁硅变形铝合金是一种应用非常广泛的挤压型材合金,普遍应用于建筑门窗,贷柜架,装饰架和某些交通工具的零部件等。为进一步提高该合金的机械性能和挤压加工性能,我们利用稀土在铝合金中具有     

Ti-V基固溶体/AB5型镧镁基合金复合储氢材料的结构与电化学性能

两步电弧熔炼法制备Ti_0.10Zr_0.15V_0.35Cr_0.10Ni_0.30 + 5wt% La_0.85Mg_0.25Ni_4.5Co_0.35Al_0.15复合储氢合金, X射线衍射(XRD)和扫描电镜-能谱(SEM-EDS)显示: 复合储氢合金的主相是体心立方结构的钒基固溶体相和六方结构的C14 Laves相, 复合过程中生成了第二相. 电化学研究表明: 复合过程中存在明显的协同效应; 在303 K时, 复合合金电极的实际最大放电容量为361.8 mAh/g; 在233 K时, 复合合金电极的低温放电能力(LTD)是母体合金电极的4.05倍. 与母体合金电极相比, 复合合金电极的高倍率放电性能(HRD)提高了26.87%, 电荷转移电阻(R_ct)减小了37.25 mΩ, 同时交换电流密度(I₀)增大了115.45 mA/g, 合金体内氢的扩散系数(D)增大了6.13×10^-10 cm²/s.     

Structure and electrochemical characteristics of LaNi5-Ti0.10Zr0.16V0.34Cr0.10Ni0.30composite alloy electrode

Composite LaNi5+x wt.% Ti0.10Zr0.16V0.34Cr0.10Ni0.30 (x=0, 1, 5, 10) alloys were prepared by two-step re-melting. X-ray diffractometer (XRD), scanning electron microscopy (FESEM), energy dispersive spectrometry (EDS), inductively coupled plasma (ICP) and electrochemical impedance spectroscopy (EIS) analyses showed that the matrix phase of LaNi5 alloy with CaCu5 structure remained unchanged after additive alloy was added, the amount of the second phase increased with increasing x. The synergetic effect withi...     

MH/Ni电池复合贮氢合金负极材料的研究进展

制备复合合金是改善贮氢合金性能的一条有效途径.归纳了MH/Ni电池复合贮氢合金负极材料不同的制备方法.从机械合金化法、熔炼法、粉末烧结法和机械混合法等4个方面,对用于MH/Ni电池负极材料的复合贮氢合金的研究现状进行了分析和综述,并提出了目前研究中存在的几个问题.     

在较低温度下电解稀土氯化物制取稀土铝—中间合金的研究

作为新型添加剂使用的稀土金属,在轻金属、有色金属和特种合金中,具有除杂,细化晶粒和合金化等作用,使产品的强度、塑性、耐热和加工性能以及成品率得以显著提高,因而添加稀土的产品品种和数量日益增加。因为稀土金属的熔点、比重、表面张力等性质与基底金属如铝、镁、铜、铁的差别较大,在空气中又容易氧化,不便保存和使用,所以,使用稀     

The Rare Earth Aluminium Alloys in China

The development and application of rare earth aluminium alloys began in the 1960s in China.The represen-tative work was the usage of rare earth metals in alumino-silicon alloys for piston.In the 1970s,its initial stage.rare earths were used in enhanced AIMgSi alloy transmission line and FeCr Al alloy electric heating wire.Duringits developing period(from 1980 to 1985),in the field of smelting,after the electrolytic preparation of RE-Almaster alloys at relatively low temperature,a new technique was invented that rare earth compounds were addedto commercial aluminium electrowinning cell to produce RE-Al alloys directly.It opened the way for the appli-cation of rare earths in industry on a large scale.In the field of application,it was found that the addition ofrare earths could improve the conductivity and processing property of aluminium alloys.The application of rareearths to aluminium conductors and products had made a breakthrough progress.Since 1986,its golden age,thestudy,production and application of aluminium alloys containing rare earths have been developing at an amazingspeed,running neck and neck with the application of RE in agriculture,textile dyeing,and cast iron.