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《浙江大学学报(A卷英文版)》2016,(2)
目的:合成新型的有机硅基离子塑晶材料[DTMA][TFSI],测试材料的物理和电化学性能,研究其掺杂改性并作为固态电解质用于锂离子电池。创新点:1.合成新型的有机硅基离子型塑晶材料;2.将三元复合塑晶材料作为固态电解质在室温下用于锂离子电池。方法:1.通过热性能分析,得到材料的塑晶温度区间和融化熵值(图1和表1);2.通过电导率测试,确定塑晶掺杂对导电性能的影响(图2);3.通过对扣式电池的充放电性能、倍率性能、循环性能以及阻抗的测试(图4~7),得到塑晶复合物作为固态电解质的电化学性能以及电池循环的稳定性和可逆性。结论:1.合成新型有机硅基离子塑晶材料[DTMA][TFSI],塑晶温度区间为–26°C到54°C;2.在纯塑晶IPC中添加10% LiODFB和10%PC,得到复合物的电导率为1×10~(-4) S/cm,提高塑晶作为固态电解质在室温下应用的可行性;3.将复合物用于LiFePO_4/Li半电池测试,在C/20倍率下,电池的放电比容量为144 mA·h/g,库伦效率为99%。在50次循环后,容量保持率为94%;4.测试结果表明,新型有机硅基离子塑晶的复合物可作为固态电解质材料应用于锂离子电池,以及更高能量密度的锂-硫和锂-空电池。 相似文献
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综述了锂离子二次电池负极材料如电介质的研究现状,对现行研究和应用的二次锂电池负极材料、电解质中存在的问题进行了深入分析并对材料的分类、特点和发展方向进行了研究。 相似文献
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钙钛矿太阳能电池(钙钛矿电池)近年来取得迅猛发展,钙钛矿电池稳定性成为急需解决的突出问题.空穴传输层是钙钛矿电池的重要功能层,其在电池中不仅承担抽取和传输空穴的基本功能,更对电池稳定性有重要影响.本文通过总结当前钙钛矿电池空穴传输层研究中的热点问题,从多种空穴传输材料使用、空穴传输层结构化和电池制备去空穴传输层等三方面综述了空穴传输层对电池稳定性的影响.为进一步提高钙钛矿电池稳定性,文章最后提出从空穴传输层材料复合和更全面深刻地理解空穴传输层基本功能两方面展开空穴传输层研究. 相似文献
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综述了锂离子二次电池负极材料和电介质的研究现状 ,对现行研究和应用的二次锂电池负极材料、电解质中存在的问题进行了深入分析并对材料的分类、特点和发展方向进行了研究 相似文献
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潘军军 《中学化学教学参考》2016,(4):71-72
一、问题提出近年来,有关水果电池的研究比较热门[1],水果中含有大量糖类、蛋白质、生物酸等物质,其中的生物酸起电解质的作用。往水果中插入不同金属电极并用导线连接起来,会有电子的转移,产生电流,形成水果电池。根据原电池的原理及形成条件,假设水果电池所产生的电流大小与水果中所含的电解质溶液、电极材料及电极 相似文献
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电解质是制备高功率密度、高能量密度、长循环寿命和安全性能良好的锂离子电池的关键材料之一。用3,5-二硝基水杨酸、硼酸、碳酸锂为原料合成了一种新的电解质材料,并应用ICP,UV,IR测定了其组成、结构。 相似文献
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《河西学院学报》2017,(2):46-53
根据光伏电池工作原理及输出特性,针对多晶硅电池进行实验研究,得到光伏电池的输出特性曲线,分析光照强度及温度对光伏电池输出特性的影响.结果表明开路电压随辐照度的变化不明显,短路电流则随辐照度的增大而增大,日照强度越强光伏电池的输出功率就越大,反之输出功率就越小.引用光伏电池组件的数学模型,在Simulink环境下建立动态仿真,仿真了不同光照强度和温度条件下的光伏电池的U-I和U-P曲线,进一步分析温度和照度对光伏电池输出特性的影响,结果显示光伏电池的温度对短路电流影响不大,而开路电压随温度的上升而减小.在不同的光照强度下,光伏电池板的P-V曲线的总变化趋势是相似的.仿真结果与实验结果一致. 相似文献
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《海外英语》2007,(5):10-11
Many college freshmen arrive woefully unprepared to do college work, and as disadvantaged populations continue to grow, the share of the American work force that has made it through college is expected to plummet. Many experts blame that educational failure not just on high schools but also on colleges. School & College, a special report by The Chronicle, looks at efforts to fix the system. What reforms would better prepare students for college? What should schools and colleges be doing differently? How should state and federal officials help? 相似文献
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罗艳萍 《读与写:教育教学刊》2008,5(6)
The communication of people partially is the communication of cultures. Culture has a direct effect on international commercial activities in all aspects. Different conceptions about time, space, equality, law and the like, lead people to deal with things in different ways. So to know cultures of the counterpart is to facil-itate our enterprises so as to have a smooth and successful communication in commercial activity. 相似文献
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《海外英语》2007,(4):36
There are numbers of crossroads on our long and unpredictable life journey where we totally have no idea about which direction to choose. No matter what our decision is, we should not turn back, but face the music and go ahead instead. I am this kind of girl who always does try without regretting, one example is how I dealt with my love. 相似文献
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Migration occurs behind a variety of reasons and has a great effect on the whole world. People may migrate in order to improve their economic situation, or in order to escape civil strife, persecution, and environmental disasters. The impact of migration is complex, bringing both benefits anddisadvantages. This paper briefly talks about the causes of migration, the allocation of benefits, and the ways in which individual countries and the international community deal with this important subject. 相似文献
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Richard Denner 《海外英语》2007,(4):14-15
Rosco and I wait for the fishermen to return.I sit at a wooden bench near the store at Mt.Baker Resort and watch the clouds change shape. Rosco has my belt around his neck and an eight foot tow chain hooked to a tree. Dogs must be on a leash. Ducks and rabbits are loose. 相似文献
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Sister Carrie is one of the most controversial characters in American literature.Thought as a "fallen woman" firstly,she was defined as a "new woman" by some critics later. However, by digging into the motivaton behind the whole process of Carrie's "success", the relationship between Carrie and her creator (the author), the social conditions of then American, it can be found that Carrie has never been free-standing on her thought and she has never found her real-sdf even after becoming a famous actress. In a society dominated by mass consumerism Carrie is only an adherent of her own desires. She also is a representative of all those country girls flooded into cities, a symbol and a sacrifice of the urbanization of America in a time countryside was overcome by cities. 相似文献
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RUZBEHANI Mohsen 《重庆大学学报(英文版)》2004,3(1):20-25
1.IntroductionOne-cyclecontrolmethod,whichwasproposedaboutonedecadeago[1],hasbecomeanattractivemethodinspecialfieldssuchaspowerfactorcorrection[2-6],switchingamplifiers[7,8],etc.Themainideaofthiscontrollerisbasedonintegrationofdiodevoltageinone-cycleandforcesittobeexactlyequaltothereferencevalue.Themainadvantageofthiscontrollerisitsrealtimeabilitytorejectthevariationofinputvoltage[1].Despitethisgreatability,ithasnogoodperformancesinrejectingofloaddisturbanceandfollowingreferencecommands.Espec… 相似文献