收藏本站
收藏 | 手机打开
二维码
手机客户端打开本文

Electrospun Poly(Vinylidene Fluoride)/Poly(Methyl Methacrylate)/Cellulose Acetate Nanofiber Membrane Separators for Re-Chargeable Liquid Electrolyte Li-ion Batteries

TUSIIMIRE YVONNE  
【摘要】:Optimum electrospinning conditions for PVDF membranes was first done.This was carried out by verifying the solution concentrations 10wr%,12wt%,14wt%and 16wt%while varying the electrospinning voltage between 14kV,16kV and 18kV and the spinning distance varied between 16cm,20cm and 22cm.The electrospinning rate of 0.8ml/h,solvent mixture acetone:DMAc ratio at 3:7 and atmospheric conditions were kept constant.The surface morphology was analyzed using the SEM to determine the nanofiber diameter distribution and average.It was deduced that uniform fiber production and distribution was at a solution concentration of 12wt%,electrospinning voltage of 16kV at a spinning distance of 20cm.These spinning conditions were then used for this research.With the optimized conditions,blended polymer membranes were then electrospun at PVDF:PMMA ratios of 100:0,90:10,85:15 and 80:20.Characterization tests were analyzed and discussed.It was found out that addition of PMMA led to increase of absorption properties,pore size,mechanical properties and average nanofiber diameter.It was also observed that addition of PMMA led to a decrease in the contact angle to 100°,melting temperature to 159.7℃(80/20 PVDF/PMMA)and crystallinity%to 30.93%(80/20 PVDF/PMMA).These observations were due to the amorphous nature of PMMA and also due to its big side group CH3OCO-.To electrospin CA based membrane,optimizing the mixing solvent was paramount.This was because there were literature proving that with certain ratios of acetone:DMAc,CA was not possible to electrospin.Therefore acetone:DMAc ratios were varied as 7:3 and 3:7.The two ratios were used to mix and electrospin PVDF:PMMA:CA ratios of 90:0:10 and 90:5:5 respectively.Characterization tests were analyzed and discussed.It was observed that to electrospin relatively uniform nanofiber diameters with better distribution,acetone:DMAc at a ratio of 3:7 was to be used.With the verified optimum conditions,blended polymer membranes were electrospun at PVDF:PMMA:CA ratios of 100:0:0,90:10:0,90:5:5 and 90:0:10.These membranes were then tested for various properties and later analyzed.It was found out that addition of CA to the electrospun blended membrane brought about further increase in the porosity absorption%of 99%at 90/0/10 PVDF/PMMA/CA.It was then concluded that addition of PMMA to PVDF improved the wettability and absorption but the fiber membrane could not retain these absorbed liquids due to an increase in pore size.Lack of good retention led to less storage of the liquid electrolyte thus less lithium ions were stored in the membrane.This led to an increase in membrane resistance causing a reduction in ionic conductivity.To improve the retention capability of the membrane,CA was introduced.Addition of CA led to an observed increase in absorption and retention of the liquids.However due to the cellulose based derivatives,there was a reduction in the ionic conductivity.With the attempt to improve the PVDF properties by addition of PMMA and CA,membrane ionic properties were compromised.


知网文化
【相似文献】
中国期刊全文数据库 前20条
1 Jing Yang;Hong-Li Wan;Zhi-Hua Zhang;Gao-Zhan Liu;Xiao-Xiong Xu;Yong-Sheng Hu;Xia-Yin Yao;;NASICON-structured Na_(3.1)Zr_(1.95)Mg_(0.05)Si_2PO_(12) solid electrolyte for solid-state sodium batteries[J];Rare Metals;2018年06期
2 Seyed Hossein Mazloumi;;Correlation of the mean activity coefficient of aqueous electrolyte solutions using an equation of state[J];Chinese Journal of Chemical Engineering;2016年10期
3 肖围;李新海;王志兴;郭华军;王接喜;黄思林;甘雷;;Physicochemical properties of a novel composite polymer electrolyte doped with vinyltrimethoxylsilane-modified nano-La_2O_3[J];Journal of Rare Earths;2012年10期
4 肖围;李新海;郭华军;王志兴;杨波;吴贤文;;Preparation and properties of composite polymer electrolyte modified with nano-size rare earth oxide[J];Journal of Central South University;2012年12期
5 濮琦;;Electrochemical Behavior of Steel Bar in Electrolytes:Influence of pH Value and Cations[J];Journal of Wuhan University of Technology(Materials Science Edition);2011年06期
6 黄涌波;瞿向东;周孑民;;Coupled heat/mass-balance model for analyzing correlation between excess AlF_3 concentration and aluminum electrolyte temperature[J];Transactions of Nonferrous Metals Society of China;2009年03期
7 ;Preparation of YSZ solid electrolyte by slip casting and its properties[J];Rare Metals;2009年04期
8 张晓燕;陈云贵;陶明大;吴朝玲;;Effect of electrolyte concentration on low-temperature electrochemical properties of LaNi_5 alloy electrodes at 233 K[J];Journal of Rare Earths;2008年03期
9 ;Impedance Studies of Spinel LiMn_2O_4 Electrode/electrolyte Interfaces[J];Chemical Research in Chinese Universities;2008年04期
10 潘春跃;冯庆;王丽君;张倩;巢猛;;Morphology and conductivity of in-situ PEO-LiClO_4-TiO_2 composite polymer electrolyte[J];Journal of Central South University of Technology;2007年03期
11 周乃君;夏小霞;王富强;;Numerical simulation on electrolyte flow field in 156 kA drained aluminum reduction cells[J];Journal of Central South University of Technology;2007年01期
12 ;Preparation and characteriza-tion of a novel composite mi-croporous polymer electrolyte for Li-ion batteries[J];Chinese Science Bulletin;2005年14期
13 邢光建;申万;杨志民;毛昌辉;杜军;;Fabrication and electrochemical properties study of LiSiPON electrolyte films[J];广东有色金属学报;2005年Z1期
14 ;Relation between powder size and electrolyte properties in nano YSZ system[J];Journal of University of Science and Technology Beijing(English Edition);2005年01期
15 ;Electrochemistry study on PEO-LiClO_4-ZSM5 composite polymer electrolyte[J];Chinese Science Bulletin;2004年08期
16 ;Relationship between CO_2 Sensor Voltage Response and Phase Equilibrium of Solid Electrolyte Na,K-β/β″-Al_2O_3[J];Journal of Materials Science & Technology;2003年05期
17 陈卫祥 ,成旦红 ,刘淑兰 ,郭鹤桐;Electrocatalytic activity and electrochemical hydrogen storage of Ni-La alloy prepared by electrodeposition from aqueous electrolyte[J];Transactions of Nonferrous Metals Society of China;2002年02期
18 方正,方圆,张全茹,李元高;Modeling of thermodynamic properties of multi-component electrolyte solutions[J];Transactions of Nonferrous Metals Society of China;2001年03期
19 J.X.Zhang,Y.F.Zheng,W.Cai,L.C.Zhao;THE TYPE II DEFECT IN 18R MARTENSITE IN A Cu-Zn-Al ALLOY[J];Acta Metallurgica Sinica(English Letters);1998年01期
20 ;Phase and structure of polycrystal Sr_(0.69) La_(0.31)F_(2.31)+SrS solid electrolyte material[J];Transactions of Nonferrous Metals Society of China;1999年03期
中国重要会议论文全文数据库 前10条
1 Jing Zhang;Rong Xu;Wei Zhang;Xunying Wang;Xiang Yang;Yan Wu;Bin Zhu;;Electrochemical properties and catalyst functions of natural CuFe oxide mineral-LZSDC composite electrolyte[A];中部四省化学化工学会2016年学术年会摘要集[C];2016年
2 ;LC-electrolyte effects in combination with pulse gradient chromatography enhance overall method performance of LC-MS-MS bioanalytical assays in supporting pharmacokinetic study for drug discovery[A];中国药理学会临床药理学专业委员会会议暨第十次全国临床药理学学术会议论文集[C];2007年
3 宋美荣;;Preparation of aluminum ultrafine particles by anodizing aluminum foil in acidic electrolyte containing chloride ions[A];第二届中国科学院博士后学术年会暨高新技术前沿与发展学术会议程序册[C];2010年
4 Levey Carol;;Self Fluxing Electrolytes for High Speed Tin Electrodeposition[A];第十届中国钢铁年会暨第六届宝钢学术年会论文集III[C];2015年
5 M.Mathias;;Hurdles in the race to automotive fuel cell commercialization materials status/needs for polymer electrolyte fuel cells[A];2008 International Hydrogen Forum Programme and Abstract[C];2008年
6 王常珍;;Study on Thermodynamics of Chemical Sensors and Materials Using Solid Electrolytes e. m. f. Method[A];第十二届中国固态离子学学术会议论文集稀土专辑[C];2004年
7 Feiwu Chen;Qing Ren;;Novel surface absorption behavior of liquid at the air-liquid interface[A];中国化学会第十六届胶体与界面化学会议论文摘要集——第四分会:胶体与界面化学中的理论问题[C];2017年
8 ;The influence of additives on the aging of potassium fluorozirconate electrolyte,discharges and PEO films during PEO process[A];第十四届全国等离子体科学技术会议暨第五届中国电推进技术学术研讨会会议摘要集[C];2009年
9 ;Investigation of La_2NiO_(4+δ)-based cathodes for SDC-carbonate composite electrolyte intermediate temperature fuel cells[A];2008 International Hydrogen Forum Programme and Abstract[C];2008年
10 ;Degradation behaviors of polymer electrolyte membrane fuel cell under freeze/thaw cycles[A];2008 International Hydrogen Forum Programme and Abstract[C];2008年
中国博士学位论文全文数据库 前2条
1 Getachew Alemu Anshebo;应用于介观太阳能电池再生过程的扫描电化学显微镜研究[D];华中科技大学;2015年
2 Aiman Mukhtar;[D];华中师范大学;2016年
中国硕士学位论文全文数据库 前4条
1 TUSIIMIRE YVONNE;[D];东华大学;2014年
2 Peipei Xu;[D];中国海洋大学;2015年
3 姜萍;[D];东华大学;2014年
4 Zahid Ali Zafar;[D];济南大学;2017年
 快捷付款方式  订购知网充值卡  订购热线  帮助中心
  • 400-819-9993
  • 010-62982499
  • 010-62783978