Surface modification of LiCo0. 05Mn1.95O4 cathode by coating with SiO2-TiO2 composite

1　INTRODUCTIONSincethefirstcommercializationbySonyCorpo rationintheearly 1990s ,thelithium ionbattery(LIB)hasbecomeamajorproducttodominatethemarketforsmallrechargeablebatteries .Further more ,Li ionbatteriesareexpectedtobeusedasalarge scaleenergystoragedeviceforelectricvehices(EV ) [1] .ThoughvarioustypesofcathodematerialssuchasLiCoO2 ,LiNiO2 ,LiMn2 O4 ,andsubstitutedtran sitionmetaloxidesarecurrentlyusedincommercial izedLi ionbatteries[2 ,3] ,LiCoO2 inthesecathodematerialsismost…     

Electrochemical performances and structure characteristic of LiMn2O4-xYx（Y=F, Cl, Br） compounds

Spinel LiMn2 O4-x Yx (Y=F, Cl, Br) compounds were prepared by solid-state reaction and the electrochemically galvanostatic charge-discharge cycles were performed using as-prepared compounds as cathode material. The influence of halogens on their lattice constants and the relation of electrochemical properties and their lattice constants were investigated. It is concluded that when the lattice constants are smaller than that of LiMn2O4, the reversible capacity fade is suppressed and the initial capacity sacrifice is observed. When the content of fluorine is 0.05, the lattice constant of LiMn2O3.95 F0.05 is larger than that of LiMn2O4, the initial capacity is improved. An efficient method was found to control the lattice constants of LiMn2O4 through the addition of halogen, and to improve the electrochemical performance of LiMn2O4. The LiMn2O3.95 F0.05 shows excellent electrochemical charge-discharge performance, with high initial capacity of 143 mAh/g and nearly no capacity loss after 116 cycles.     

Industrial testing of property-modified prebaked carbon anode for aluminum electrolysis

1　INTRODUCTIONInaluminumelectrolysis process ,thequantitygradeofcarbonanoderestrictsnotonlytheimprove mentofproductiontechniques ,butalsotheadvance mentofproductiontargets.Formany years ,largenumberofresearchesweredonetoimprovethephysi cal,chemicalandelectrochemicalperformanceoftheanodeinordertoenhancecurrentefficiency ,reduceenergyconsumption ,decrease productioncostandcleancircumstanceofaluminum plantanditssur roundingarea .Recently ,manylaboratoryresearchresultsweresuccessfullyappliedf…     

建立营销中的核心记忆点

营销是市场运作的核心问题,在当前形势下,营销尤为重要。如何在市场低迷的环境下实现营销的突围与创新,使产品成功销售,成为我们众多房地产一线从业人员工作的重中之重。     

防止砖混建筑顶层墙体温度裂缝的结构设计措施

对柳州地区砖混建筑顶层墙体常见温度裂缝进行了分析 ,提出了防止温度裂缝的结构设计措施     

炭/炭复合材料研制项目风险分析及研究

采用项目风险管理中故障树法的相关理论和方法,以炭/炭(C/C)刹车盘研制项目为案例开展风险分析及研究。通过分析结果能够相对准确地定位系统存在故障的节点,从而为项目制定控制措施提供依据,而且也可以为其他类似C/C复合材料研制项目提供有益的参考。     

高性能不饱和聚酯清底漆的配方设计

通过一些涂料原材料的筛选搭配,得到高性能不饱和聚酯底漆,具有优异的填充性能、打磨性能、消泡性能和抗塌陷性能,满足消费者需求。     

聚乙烯通用新型螺杆的设计及其在SJ-65型吹塑薄膜机组上的应用

用较少的投资改造现有设备,作到“一机多用”,以适应我国塑料原料的发展现状,是塑料加工业界的新课题,为此而设计的通用新型螺杆,已在SJ-65型吹塑薄膜机组上取得良好的应用效果。本文详述了新螺杆的结构设计和主要几何参数的选择,结果表明,新螺杆适用各种聚乙烯原料的挤塑加工,与原有机组和日本同类型机组比较,比流量提高11～17%;产量提高30%以上;能耗降低12～18%;质量符合企业现用标准。     

复合型多功能聚乙烯棚膜的开发

本文论述了复合型多功能聚乙烯棚膜的结构设计,功能性助剂的选择及生产工艺。对产品的耐老化性能、保温性能和无滴性能的测试数据及实际应用效果进行了分析,结果表明复合型多功能聚乙烯棚膜与单层多功能聚乙烯棚膜相比,具有成本低,助剂间相互干扰小,使用效果好的特点,综合经济效益显著。     

水性抗流挂清底漆的研发与应用

介绍了一种水性抗流挂清底漆的研发及应用,并从树脂、成膜助剂、润湿剂、消泡剂、打磨助剂以及流变助剂分别讨论了对水性抗流挂清底漆的影响,尤其是流变助剂的选择.解决了抗流挂问题,水性木器涂料可以很好地进行立面喷涂,就可以采用流水线涂装从而提高生产效率和产品质量稳定性,对水性木器涂料的推广具有重要的意义.