通过静电纺丝技术制备得到了聚酰亚胺 (PI)纤维膜,经过扫描电子显微镜、傅里叶红外吸收光谱和热失重测试确定静电纺丝的最优方案,即:纺丝电压为15kV,纺丝速度为0.6mL/h,后处理为化学亚胺化和热亚胺化各3h。经过接触角测试表明,PI纤维膜与电解液有很好的润湿性能,孔隙率可达107%。一系列的测试表明,通过结构调控得到的PI纤维膜可以很好地替代传统的聚烯烃锂离子电池隔膜。
Conventional polyolefin lithium ion battery separators have serious safety hazards due to low melting point,poor thermal stability and the like.Polyimide (PI) can make up for the defects of traditional polyolefin lithium ion battery separators due to its excellent mechanical strength and thermal stability.The polyimide fiber membrane prepared by the electrospinning technology has high porosity,excellent electrolyte wettability and high thermal properties,and can be well applied in the field of lithium ion battery separators.After scanning electron microscopy,fourier infrared absorption spectroscopy and thermal weight loss test,the optimal solution for electrospinning was determined,namely:voltage was 15kV,spinning speed was 0.6mL/h,and post-treatment was chemical imidization.And thermal imidization for 3h,the contact angle test showed that the membrane and the electrolyte had good wetting properties,and the calculated porosity can reach 107%.A series of tests shown that the membrane obtained by structural regulation can be a good substitute for the traditional polyolefin lithium ion battery separators.
[1] Li L,Liu P,Fu Q S,et al.Study on preparation of polyacrylonitrile/polyimide composite lithium-ion battery separator by electrospinning[J].Journal of Materials Research,2019,34 (4):642-651.
[2] Wu Z S,Ren W C,Wen L,et al.Graphene anchored with Co3O4 nanoparticles as anode of lithium ion batteries with enhanced reversible capacity and cyclic performance[J].ACS Nano,2010,4 (6):3187-3194.
[3] Yan L K,Zhang G,Zhang L,et al.Robust construction of underwater superoleophobic CNTs/nanoparticles multifunctional hybrid membranes via interception effect for oily wastewater purification[J].Journal of Membrane Science,2019,569:32-40.
[4] 段应娇,王倩.非对称型超级电容器电极材料研究进展[J].化工新型材料,2019,47 (6):7-12.
[5] Lin J,Xu Y L,Wang J,et al.Preinserted li metal porous carbon nanotubes with high coulombic efficiency for lithium-ion battery anodes[J].Chemical Engineering Journal,2019,373:78-85.
[6] Zhou G M,Wang D W,Li F,et al.Graphene-wrapped Fe3O4 anode material with improved reversible capacity and cyclic stability for Lithium ion batteries[J].Chemistry of Materials,2010,22 (18):5306-5313.
[7] Wang H,Cui L F,Yang Y,et al.Mn3O4-graphene hybrid as a high-capacity anode material for lithium ion batteries[J].J Am Chem Soc,2010,132 (40):13978-13980.
[8] 于洪珺,储海蓉,张玉环,等.高容量锂离子电池负极材料ZnMn2O4-Fe2O3的制备[J].化工新型材料,2019,47 (3):99-103.
[9] Zhang T W,Shen B,Yao H B,et al.Prawn shell derived chitin nanofiber membranes as advanced sustainable separators for li/na-Ion batteries[J].Nano Lett,2017,17 (8):4894-4901.
[10] Baginska M,Blaiszik B J,Merriman R J,et al.Autonomic shutdown of Lithium-ion batteries using thermoresponsive microspheres[J].Advanced Energy Materials,2012,2 (5):583-590.
[11] Dong X L,Mi W L,Yu L H,et al.Zeolite coated polypropylene separators with tunable surface properties for lithium-ion batteries[J].Microporous and Mesoporous Materials,2016,226:406-414.
[12] Shi C,Dai J,Li C,et al.A modified ceramic-coating separator with high-temperature stability for lithium-ion battery[J].Polymers (Basel),2017,9 (5).
[13] Shi C,Zhu J W,Shen X,et al.Flexible inorganic membranes used as a high thermal safety separator for the lithium-ion battery[J].RscAdvances,2018,8 (8):4072-4077.
[14] Yu L H,Jin Y,Lin Y S.Ceramic coated polypropylene separators for lithium-ion batteries with improved safety:effects of high melting point organic binder[J].Rsc Advances,2016,6 (46):40002-40009.
[15] Wang Z H,Xiang H F,Wang L J,et al.A paper-supported inorganic composite separator for high-safety lithium-ion batteries[J].Journal of Membrane Science,2018,553:10-16.
[16] Zhao J H,Kang T,Chu Y L,et al.A polyimide cathode with superior stability and rate capability for lithium-ion batteries[J].Nano Research,2019,12 (6):1355-1360.
[17] Zhu Y T,Hui D,Qiu Y P.Mechanical,electrical and thermal properties of aligned carbonnanotube/polyimide composites[J].Composites Part B-Engineering,2014,56:408-412.
[18] Cai M,Zhu J W,Yang C C,et al.A parallel bicomponent TPU/PI membrane with mechanical strength enhanced isotropic interfaces used as polymer electrolyte for lithium-ion battery[J].Polymers,2019,11 (1).
[19] Chao M.Synthesis and characterization of semicrystalline polyimides containing bridged linkages[J].International Journal of Polymer Science,2018,2018:1-7.
[20] Jiang S H,Hou H Q,Agarwal S,et al.Polyimide nanofibers by “green” electrospinning via aqueous solution for filtration applications[J].ACS Sustainable Chemistry & Engineering,2016,4 (9):4797-4804.
[21] 张燕,职欣心,武晓,等.聚酰亚胺材料在智能制造领域的应用进展[J].化工新型材料,2019,47 (5):1-4.
[22] Guo Y Q,Xu G J,Yang X T,et al.Significantly enhanced and precisely modeled thermal conductivity in polyimide nanocomposites with chemically modified graphene via in situ polymerization and electrospinning-hot press technology[J].Journal of Materials Chemistry C,2018,6 (12):3004-3015.
[23] Yi B,Zhao Y T,Tian E L,et al.High-performance polyimide nanofiber membranes prepared by electrospinning[J].High Performance Polymers,2018,31 (4):438-448.
[24] Kohse S,Grabow N,Schmitz K P,et al.Electrospinning of polyimide nanofibres-effects of working parameters on morphology[J].Current Directions in Biomedical Engineering,2017,3 (2).
[25] Lasprilla B J,Álvarez L M,Lagaron J M.The influence of electrospinning parameters and solvent selection on the morphology and diameter of polyimide nanofibers[J].Materials Today Communications,2018,14:1-9.
[26] 易波,赵运涛,李静,等.电纺聚酰亚胺/氧化石墨烯复合纳米纤维膜的制备及性能研究[J].化工新型材料,2019,47 (5):64-67.
基金资助
大学生创新创业训练计划项目(201810710121)
PDF
(7990KB)
