Phase Inversion Strategy to Flexible Freestanding Electrode: Critical Coupling of Binders and Electrolytes for High Performance Li–S Battery

Development of flexible and freestanding electrode is attracting great attention in lithium–sulfur (Li–S) batteries, but the severe capacity fading caused by the lithium polysulfides (PSs) shuttle effect remains challenging. Herein, a completely new polymeric binder of polyethersulfone is introduced. Not only it enables massive production of flexible/current‐free electrode by a novel concept of “phase‐inversion” approach but also the resultant polymeric networks can effectively trap the soluble polysulfides within the electrode, owing to the higher hydrophilicity and stronger affinity properties than the routine polyvinylidene fluoride. Coupling with polysulfide‐based electrolyte, the Li–S cell shows a higher capacity of 1141 mAh g^?1, a lower polarization of 192 mV, and a more stable capacity retention with 100% Coulombic efficiency over 100 cycles at 0.25C. The advantages of favored binder and electrolyte are further demonstrated in lithium‐ion sulfur full battery with lithiated graphite anode, which demonstrates much improved performance than those previously reported. This work not only introduces a novel strategy for flexible freestanding electrodes but also enlightens the importance of coupling electrodes and electrolytes to higher performances for Li–S battery.     

高抗冲聚苯乙烯粒子发灰原因分析及对策

针对高抗冲聚苯乙烯（HIPS）生产过程中出现的粒子发灰现象,从原料、聚合和脱挥单元分析了原因,并采取了相应对策。结果表明:原料苯乙烯的含氧储存环境、聚丁二烯橡胶（BR）中挥发分及氯离子含量高是导致产品粒子发灰的主要原因;将苯乙烯存储由有氧环境改为氮气环境,严格控制 BR 中挥发分质量分数小于 0.5%,且优选线型低顺式BR,可有效降低 HIPS 产品粒子发灰的几率。     

二茂铁及其衍生物修饰电极的研究

二茂铁及其衍生物修饰电极在电催化、电分析和生物传感器等方面具有重要的应用前景。本文对二茂铁及其衍生物修饰电极分类、制备、特点及其应用等方面的研究现状作了归纳和评述。提出了今后研究工作的方向。     

海洋大气近地层折射指数模式及其在蒸发波导分析上的应用

利用Ｍｏｎｉｎ－Ｏｂｕｋｈｏｖ相似理论给出了不同大气结条件下海洋大气近地层折射指数模式，并利用这些模式分析了蒸发波导内可能存在的波导模，给出了确定蒸发波导所能捕获最大电磁波波长及相应最低频率的计算式并对其在不同大气层结条件下的计算结果进行了比较，发现在不稳定、中性和近中性层结条件下，其计算结果比较接近，但在强稳定层结条件下，差异显著，最后给出了射线追踪方程，并通过用多层线性模式来近似蒸发波导内大气     

改性膨润土防渗浆材的性能研究

以聚乙烯醇为改性剂制得有机化膨润土,并与水泥、粉煤灰及辅助添加剂组成防渗浆材,通过正交试验法,分析了浆材固结体的渗透性、吸附阻滞性和耐久性。结果表明,以改性膨润土代替天然膨润土获得的浆材具有更低的渗透系数、更好的吸附阻滞性及耐腐蚀性,完全满足抗渗要求。     

改性沥青同步碎石上封层在 G109 线兰州段的应用

结合SBS改性沥青同步碎石在G109国道上的实际应用,得出SBS改性沥青同步碎石上封层可提高路面抵抗反射裂缝的能力,对路面裂缝、龟网裂有很好的修复作用,具备良好的防水性能和粘结性能,使路面抗滑,有施工速度快、成本支出小、施工简便等优点。     

裂解汽油一段加氢催化剂LY-9801 D的研制与工业应用

以钯为活性组分,改性Al2O3为载体,采用浸渍法制备了用于裂解汽油一段选择加氢的LY-9801 D催化剂。物性表征表明,与LY-9801催化剂相比,LY-9801 D催化剂载体致密性好,堆密度和压碎强度高。在中国石油兰州石化分公司大乙烯装置上的工业应用表明,在操作条件为进料量22~30 t/h(设计值为28 t/h),反应器入口温度28~36℃,压力2.65 MPa,氢气/原料体积比100~200时,装置运行14个月,反应器入口温度仅为36℃,加氢产品双烯值小于2.5×10-2g/g,达到设计值要求。     

随车乳化器的研制及乳化特性的实验研究

设计了能将柴油和水在管线上进行乳化的随车乳化器及油水比例控制阀。在不加乳化剂的情况下，进行了乳化效果及乳化特性的实验研究，经一系列的试验表明，该随车乳化器具有良好的乳化效果。     

An improved BEM model for the power curve prediction of stall‐regulated wind turbines

Blade element momentum (BEM) theory is the standard computational technique for the prediction of power curves of wind turbines; it is based on the two‐dimensional aerodynamic properties of aerofoil blade elements and some corrections accounting for three‐dimensional wing aerodynamics. Although most BEM models yield acceptable results for low‐wind and pitch‐controlled regimes where the local angles of attack are small, no generally accepted model exists up to date that consistently predicts the power curve in the stall regime for a variety of blade properties and operating conditions. In this article we present a modified BEM model which satisfactorily reproduces the power curves of four experimental wind turbines reported in the literature, using no free fit parameters. Since these four experimental cases comprehend a great variety of conditions (wind tunnel vs field experiments, different air densities) and blade parameters (no twist and no taper, no taper but twist, both twist and taper, different aerofoil families), it is believed that our model represents a useful working tool for the aerodynamic design of stall‐regulated wind turbines. Copyright © 2004 John Wiley & Sons, Ltd.     

乙醇柴油混合燃料的应用研究

介绍了乙醇与柴油在助溶剂的作用下形成稳定期较长的混合燃料-E10和E15,它们的理化性质与普通柴油接近。在不对柴油机作改动设计的情况下,进行实车运行试验,柴油机动力性能下降幅度不大,燃料消耗增加不多,同时排烟有明显改善,说明乙醇燃料具有良好的应用前景。