本文選題：聚合物鋰離子電池 + 聚合物電解質(zhì)�。� 參考：《江蘇科技大學》2014年碩士論文

【摘要】：聚合物鋰離子電池是目前鋰電池研究的最高水平，它不僅具有液態(tài)鋰離子電池的特點，而且還在形狀設(shè)計、容量、充放電效率、循環(huán)壽命和環(huán)保性能等方面更具優(yōu)勢。此外，聚合物鋰離子電池還不存在液態(tài)電解質(zhì)電池所存在的漏液污染和燃燒爆炸等問題，從根本上解決安全隱患。 本文重點研究了聚偏氟乙烯(PVDF)基體的復合多孔凝膠聚合物電解質(zhì)，用不同方法設(shè)計制備了三種復合多孔凝膠聚合物電解質(zhì)：(1)采用原位聚合和溶膠凝膠法制備出新型添加劑SiO2(Li+)，以浸沒沉淀法制備出復合多孔凝膠聚合物電解質(zhì)樣品。通過SEM對其形貌進行表征，對樣品進行電化學方面的交流阻抗、線性伏安掃描和電池性能進行了測試。研究結(jié)果表明，添加5%SiO2(Li+)的復合聚合物電解質(zhì)形貌均勻，對應(yīng)的凝膠聚合物電解質(zhì)的室溫離子電導率達4.6×10-3S/cm，電化學穩(wěn)定窗口可達5.1V；(2)采用溶液聚合反應(yīng)與中和反應(yīng)合成一種新型離子聚合物：聚氨酯鋰鹽(PLS)，以熱相分離法制備出混合多孔凝膠聚合物電解質(zhì)。電化學性能測試表明，10%PLS共混的復合多孔凝膠聚合物電解質(zhì)室溫離子電導率可達2.5×10-3S/cm、離子遷移數(shù)達0.457、電化學穩(wěn)定窗口可達4.95V以及充放電50次循環(huán)后的放電容量仍然可達到初始放電容量的89%；(3)采用原位聚合法與酸堿中和法制備出一種有機物包覆無機相的新型有機/無機納米粒子(SiO2-PAALi)，以靜電紡絲法制備出納米復合凝膠聚合物電解質(zhì)。機械性能測試表明，，摻雜SiO2-PAALi納米顆粒制備出的靜電紡膜，其拉伸強度和斷裂伸長率分別可達48.8MPa和25.6%。電化學測試分析表明，添加SiO2-PAALi顆粒凝膠聚合物電解質(zhì)的電化學性能得到了很大的提升。其室溫離子電導率為3.5×10-3S/cm、離子電導率與溫度的關(guān)系符合阿累尼烏斯關(guān)系式；電化學穩(wěn)定窗口可達5.05V、及充放30次循環(huán)后的放電容量仍然可達到初始放電容量的96.99%，表現(xiàn)出良好的循環(huán)性能。
[Abstract]:Polymer lithium-ion battery is the highest research level at present. It not only has the characteristics of liquid lithium-ion battery, but also has more advantages in shape design, capacity, charge / discharge efficiency, cycle life and environmental protection performance. In addition, polymer lithium-ion batteries do not have the problems of liquid leakage pollution and combustion explosion in liquid electrolyte batteries, which fundamentally solve the potential safety problems. In this paper, the polyvinylidene fluoride (PVDF) matrix composite porous gel polymer electrolyte was studied. Three kinds of composite porous gel polymer electrolytes were designed and prepared by different methods. In situ polymerization and sol-gel method were used to prepare a new additive, SiO2(Li, and the composite porous gel polymer electrolyte samples were prepared by immersion precipitation method. The morphology was characterized by SEM, electrochemical impedance, linear voltammetry and battery performance were measured. The results show that the morphology of the composite polymer electrolyte with 5%SiO2(Li) is uniform. The ionic conductivity of the corresponding gel polymer electrolyte was 4.6 脳 10 ~ (-3) S / cm at room temperature, and the electrochemical stability window could reach 5.1 V ~ (2) A new ionic polymer, polyurethane lithium-ion salt, was synthesized by solution polymerization and neutralization reaction. The polymer was prepared by thermal phase separation method. Mixed porous gel polymer electrolyte. The electrochemical performance test shows that the ionic conductivity of composite porous gel polymer electrolyte mixed with 10PLS is 2.5 脳 10 ~ (-3) S / cm at room temperature, the ion mobility is 0.457, the electrochemical stability window can reach 4.95 V and the discharge capacity can still be obtained after 50 cycles of charge and discharge. A novel organic / inorganic nano-particle, SiO2-PAALiN, was prepared by in-situ polymerization and acid-base neutralization, and nano-composite gel polymer electrolyte was prepared by electrospinning. The mechanical properties show that the tensile strength and elongation at break of the electrospun films prepared by doped SiO2-PAALi nanoparticles can reach 48.8MPa and 25.6, respectively. Electrochemical analysis showed that the electrochemical properties of polymer electrolytes with SiO2-PAALi particles were greatly improved. The ionic conductivity at room temperature is 3.5 脳 10 ~ (-3) S / cm, and the relationship between ionic conductivity and temperature is in accordance with the Arrhenius relation. The electrochemical stability window can reach 5.05 V, and the discharge capacity after 30 cycles can still reach 96.99% of the initial discharge capacity, showing good cycling performance.
【學位授予單位】：江蘇科技大學
【學位級別】：碩士
【學位授予年份】：2014
【分類號】：TM912

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本文編號：1971066