聚丙烯膜辐射接枝聚丙烯酰胺制备锂离子二次电池隔膜研究
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摘要
通过共辐射接枝的方法将聚丙烯酰胺(Polyacrylamide,PAAm)接枝到聚丙烯(Polypropylene,PP)膜上,研究了丙烯酰胺单体浓度对接枝率的影响。接枝前后隔膜的红外光谱(Fourier transform infrared spectroscopy,FT-IR)对比表明,聚丙烯酰胺已经成功接枝到PP膜上,对隔膜的热性能、机械性能、电导率等性能进行了表征。将隔膜组装成扣式电池后,充放电循环性能测试结果表明,在相同条件下以PP-g-PAAm作为隔膜的锂离子电池性能优于以原始PP作为隔膜的电池性能。
Background: The separator is an important part of the battery, which prevents physical contact between electrodes during enable lithium ionic transportation. But most commercialized polyolefin porous membranes show low ion conductivity due to their inherent hydrophobic property and low porosity(45%). Purpose: The aim is to introduce polyacrylamide(PAAm) onto polypropylene(PP) separator, which could improve the affinity between nonaqueous electrolytes and electrodes. Methods: PP-g-PAAm separator was prepared by irradiation graft polymerization technique. The structure and the performance of pristine PP and PP-g-PAAm separator were analyzed by Fourier transform infrared spectroscopy(FT-IR) and scanning electron microscope(SEM) from the aspects of mechanical property, liquid electrolyte uptake and lithium-ion conductivity. The coin cell was assembled in the Ar-filled glove box and investigated. Results and Conclusion: The results indicate that the coin cell with the PP-g-PAAm separator performs better than that one with the pristine PP separator under the same condition.
Background: The separator is an important part of the battery, which prevents physical contact between electrodes during enable lithium ionic transportation. But most commercialized polyolefin porous membranes show low ion conductivity due to their inherent hydrophobic property and low porosity(45%). Purpose: The aim is to introduce polyacrylamide(PAAm) onto polypropylene(PP) separator, which could improve the affinity between nonaqueous electrolytes and electrodes. Methods: PP-g-PAAm separator was prepared by irradiation graft polymerization technique. The structure and the performance of pristine PP and PP-g-PAAm separator were analyzed by Fourier transform infrared spectroscopy(FT-IR) and scanning electron microscope(SEM) from the aspects of mechanical property, liquid electrolyte uptake and lithium-ion conductivity. The coin cell was assembled in the Ar-filled glove box and investigated. Results and Conclusion: The results indicate that the coin cell with the PP-g-PAAm separator performs better than that one with the pristine PP separator under the same condition.
引文
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20 Yang X,Deng B,Liu Z,et al.Microfiltration membranes prepared from acryl amide grafted poly(vinylidene fluoride)powder and their p H sensitive behaviour[J].Journal of Membrane Science,2010,362:298-305.DOI:10 .1016/j.memsci.2010.06.057
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22 Gupta B,Anjum N.Development of membranes by radiation grafting of acrylamide into polyethylene films:characterization and thermal investigations[J].Journal of Applied Polymer Science,2001,82:2629-2635.DOI:10 .1002/app.2115
23 杨璇璇,邓波,虞鸣,等.预辐射接枝丙烯酰胺改性PVDF粉体及其亲水性滤膜的制备[J].辐射研究与辐射工艺学报,2011,29(4):209-213YANG Xuanxuan,DENG Bo,YU Ming,et al.Hydrophilic microfiltration membranes prepared from acrylamide grafted PVDF powder byγ-rays pre-irradiation[J].Journal of Radiation Research and Radiation Processing,2011,29(4):209-213
24 Gao K,Hu X,Yi T,et al.PE-g-MMA polymer electrolyte membrane for lithium polymer battery[J].ElectrochimicaActa,2006,52:443-449.DOI:10.1016/j.electacta.2006.05.049
2 Liu J,Li W,Zuo X,et al.Polyethylene-supported polyvinylidene fluoride–cellulose acetate butyrate blended polymer electrolyte for lithium ion battery[J].Journal of Power Sources,2013,226:101-106.DOI:10 .1016/j.jpowsour.2012.10.078
3 Huang X,Hitt J.Lithium ion battery separators:development and performance characterization of a composite membrane[J].Journal of Membrane Science,2013,425:163-168
4 麻明友,何则强,熊利芝,等.量子化学原理在锂离子电池研究中的应用[J].吉首大学学报(自然科学版),2006,27(3):97-105MA Mingyou,HE Zeqiang,XIONG Lizhi,et al.Applications of quantum chemistry principles in research of Li-ion batteries[J].Jishou University Journal(Natural Science),2006,27(3):97-105
5 郭金亮,巩桂芬,张阳.EVOH磺酸锂无纺布薄膜的制备及性能研究[J].电池工业,2012,17:31-34GUO Jinliang,GONG Guifen,ZHANG Yang.Investigation on preparation and properties of EVOH-SO3Li non-woven membrane[J].Battery Industry,2012,17:31-34
6 Ryou M H,Lee Y M,Park J K,et al.Mussel-inspired polydopamine-treated polyethylene separators for high-power Li-ion batteries[J].Advanced Materials,2011,23 :3066-3070.DOI:10.1002/adma.201100303
7 Choi S H,Kang H J,Ryu E N,et al.Electrochemical properties of polyolefin nonwoven fabric modified with carboxylic acid group for battery separator[J].Radiation Physics and Chemistry,2001,60:495-502
8 Zhang S S.A review on the separators of liquid electrolyte Li-ion batteries[J].Journal of Power Sources,2007,164:351 -364.DOI:10.1016/j.jpowsour.2006.10.065
9 Arora P,Zhang Z.Battery separators[J].Chemical Reviews,2004,104:4419-4462
10 Kim J Y,Lim D Y.Surface-modified membrane as a separator for lithium-ion polymer battery[J].Polymer Battery Energies,2010,3:866-885.DOI:10.3390/en 3040866
11 Shi J L,Fang L F,Li H,et al.Improved thermal and electrochemical performances of PMMA modified PE separator skeleton prepared via dopamine-initiated ATRP for lithium ion batteries[J].Journal of Membrane Science,2013,437:160-168.DOI:10.1016/j.memsci.2013.03.006
12 苑洪铭,李吉豪,于洋,等.PVDF粉体预辐照接枝甲基丙烯酸缩水甘油酯制备锂离子二次电池隔膜研究[J].辐射研究与辐射工艺学报,2011,29(5):266-270YUAN Hongming,LI Jihao,YU Yang,et al.Study on lithium-ion secondary battery separator prepared by graft polymerization of GMA onto PVDF powder under preirradiation[J].Journal of Radiation Research and Radiation Processing,2011,29(5):266-270
13 李万新,王自强,俞初红,等.聚乙烯膜表面辐射接枝甲基丙烯酸-4,5-二甲氧基-2-硝基苯甲酯实现光敏化[J].辐射研究与辐射工艺学报,2015,33(2):020301.DOI:10 .11889/j.1000-3436.2015.rrj.33.020301LI Wanxin,WANG Ziqiang,YU Chuhong,et al.Photosensitizing modification of polyethylene film by irradiation grafting with 4,5-dimethyl-2-nitrobenzene methacrylate[J].Journal of Radiation Research and Radiation Processing,2015,33(2):020301.DOI:10 .11889/j.1000-3436.2015.rrj.33.020301
14 Ma H,Yao S,Li J,et al.A mild method of amine-type adsorbents syntheses with emulsion graft polymerization of glycidyl methacrylate on polyethylene non-woven fabric by pre-irradiation[J].Radiation Physics and Chemistry,2012,81:1393-1397.DOI:10.1016/j.radphyschem.2011.11.042
15 于宾,焦小宁.锂离子电池隔膜改性研究现状[J].合成纤维工业,2014,37(1):55-59YU Bin,JIAO Xiaoning.The modification status of the lithium-ion battery separator[J].Synthetic Fiber Industry,2014,37(1):55-59
16 Li J,Zhang C,Chen T,et al.Irradiation and flame retardant effect of poly[bis(phenoxyphosphazene)]and magnesium hydroxide in LDPE composites[J].Nuclear Science and Techniques,2015,26(3):030304.DOI:10 .13538/j.1001-8042/nst.26.030304
17 Deng B,Li J,Hou Z,et al.Microfiltration membranes prepared from polyethersulfone powder grafted with acrylic acid by simultaneous irradiation and their p H dependence[J].Radiation Physics and Chemistry,2008,77 :898-906.DOI:10.1016/j.radphyschem.2008.02.008
18 Deng B,Yang X,Xie L,et al.Microfiltration membranes with p H dependent property prepared from poly(methacrylic acid)grafted polyethersulfone powder[J].Journal of Membrane Science,2009,330:363 -368.DOI:10.1016/j.memsci.2009.01.010
19 Deng B,Yu M,Yang X X,et al.Antifouling microfiltration membranes prepared from acrylic acid or methacrylic acid grafted poly(vinylidene fluoride)powder synthesized via pre-irradiation induced graft polymerization[J].Journal of Membrane Science,2010,350 :252-258.DOI:10.1016/j.memsci.2009.12.035
20 Yang X,Deng B,Liu Z,et al.Microfiltration membranes prepared from acryl amide grafted poly(vinylidene fluoride)powder and their p H sensitive behaviour[J].Journal of Membrane Science,2010,362:298-305.DOI:10 .1016/j.memsci.2010.06.057
21 Martín-Alfonso J E,Franco J M.Influence of polymer reprocessing cycles on the microstructure and rheological behavior of polypropylene/mineral oil oleogels[J].Polymer Test,2015,45:12-19
22 Gupta B,Anjum N.Development of membranes by radiation grafting of acrylamide into polyethylene films:characterization and thermal investigations[J].Journal of Applied Polymer Science,2001,82:2629-2635.DOI:10 .1002/app.2115
23 杨璇璇,邓波,虞鸣,等.预辐射接枝丙烯酰胺改性PVDF粉体及其亲水性滤膜的制备[J].辐射研究与辐射工艺学报,2011,29(4):209-213YANG Xuanxuan,DENG Bo,YU Ming,et al.Hydrophilic microfiltration membranes prepared from acrylamide grafted PVDF powder byγ-rays pre-irradiation[J].Journal of Radiation Research and Radiation Processing,2011,29(4):209-213
24 Gao K,Hu X,Yi T,et al.PE-g-MMA polymer electrolyte membrane for lithium polymer battery[J].ElectrochimicaActa,2006,52:443-449.DOI:10.1016/j.electacta.2006.05.049