發(fā)布時間：2018-04-01 12:27

  本文選題：鋰/氟化碳電池　切入點(diǎn)：C5H11PF2O3　出處：《云南師范大學(xué)》2014年碩士論文

【摘要】：本文主要工作如下： 1、簡要論述了鋰電池發(fā)展歷程，鋰/氟化碳電池的優(yōu)缺點(diǎn)，鋰電池有機(jī)電解液的分類和選取，氟化碳材料的制備工藝和近期發(fā)展。 2、合成了一種氟化酯類有機(jī)化合物C5H11PF2O3，將其用于鋰/氟化碳電池電解液體系。 3、深入研究常溫時電極/電解液界面性能，探討鋰鹽、有機(jī)溶劑對其電化學(xué)性能的影響。從鋰鹽方面來說，LiBF4具有良好的電化學(xué)穩(wěn)定性和高低溫性能。在有機(jī)溶劑方面，制備所得的C5H11PF2O3粘度大，導(dǎo)電性能較差，不可以單獨(dú)作為鋰/氟化碳電解液的溶劑。PC:DME=1:1體系與氟化碳電極的倍率性能較好。C5H11PF2O3（A）與常用電解液體系混合（PC:DME:A=1:1:1, v:v:v），會影響電解液體系的性能。 4、進(jìn)一步研究高溫55℃時鋰/氟化碳電池電極與電解液之間的界面電化學(xué)性能。C5H11PF2O3作為單一溶劑構(gòu)成電解液，性能發(fā)揮的不佳。PC:DME=1:1小倍率下性能良好，但大倍率時性能較差，容量衰減較快。C5H11PF2O3（A）與常用電解液體系混合（PC:DME:A=1:1:1, v:v:v），在大倍率下?lián)碛懈叩姆烹婋妷海烹娗�平滑，可以表現(xiàn)出較佳的高溫性能。 5、研究了不同氟化度的氟化碳材料對鋰/氟化碳電池性能的影響。采用球形碳作為碳源制備氟化碳材料，，通過SEM、FT-IR、XRD等測試手段分析了不同氟化度氟化碳材料的結(jié)構(gòu)特點(diǎn)，并對不同氟化度氟化碳材料的電化學(xué)性能進(jìn)行了測試和比較，深入地了解了氟化碳材料結(jié)構(gòu)對其電化學(xué)性能的影響因素。
[Abstract]:The main work of this paper is as follows:1. The development of lithium battery, the advantages and disadvantages of lithium / fluorocarbon battery, the classification and selection of organic electrolyte for lithium battery, the preparation technology and recent development of fluorocarbon material are briefly discussed.A fluorinated ester organic compound C5H11PF2O3 was synthesized and used in lithium / carbon fluoride battery electrolyte system.3. The interfacial properties of electrode / electrolyte at room temperature were studied, and the effects of lithium salts and organic solvents on their electrochemical properties were discussed.LiBF4 has good electrochemical stability and high and low temperature properties from the aspect of lithium salts.In the aspect of organic solvent, the prepared C5H11PF2O3 has high viscosity and poor conductivity.It can not be used alone as the solvent of lithium / fluorocarbon electrolyte. PC: DME1: 1: 1 system and carbon fluoride electrode have better rate performance. C5H11PF2O3A) and common electrolyte system can be mixed with PCDME1: A1: 1: 1: 1, vvvvv1%, which will affect the performance of electrolyte system.4. The interfacial electrochemical performance of lithium / carbon fluoride battery electrode and electrolyte at 55 鈩

本文編號：1695595