本研究中合成一系列的嵌段共聚物 PEG-b-PSBMA，該結構中包含了聚乙二醇 (PEG) 嵌段，以及不同比例之兩性離子 (PSBMA) 嵌段，將其應用在鋰離子電池的固態高分子電解質之中。研究首先合成出鏈轉移試劑 CPADB，並與聚乙二醇單甲醚 (MPEG) 經由酯化反應，形成高分子鏈轉移試劑 PEG-CPADB，接著引入不同當量之兩性離子單體 SBMA，透過可逆加成-斷裂鏈轉移聚合反應 (RAFT)，形成聚乙二醇與兩性離子之嵌段共聚物，PEG-b-PSBMA，最後將其混摻於聚環氧乙烷 (PEO) 中，製備出固態高分子電解質。通過1H-NMR 與 FT-IR 光譜儀進行化合物及高分子之結構鑑定，同時也用以確認嵌段共聚物中兩性離子的嵌段比例，而 GPC 將確認高分子之分子量分佈集中情形，熱性質則藉由 TGA 和 DSC 進行測量，最後利用電化學量測探討固態高分子電解質之各種電化學性質，如: 離子電導率、線性掃描伏安法、充放電表現與鋰離子遷移數，其中加入 PEG90-b-PSBMA¬40 於 PEO 基質時 (嵌段共聚物與 PEO的重量比為 1 : 100)，在80 °C下，固態高分子電解質具有 5.43 × 10-4 S/cm 之離子電導率，證實兩性離子的獨特結構能夠加強電解質內鋰鹽之解離能力，以及促進鋰離子於電池內部之遷移能力，此外 PEO電解質在添入 PEG-b-PSBMA ，並經首次充放電循環後，皆可展現出約 100 % 之磷酸鋰鐵正極理論電容值，而 PEG90-b-PSBMA30 添入 PEO所形成的固態高分子電解質，其鋰離子遷移數的數值可達 0.211。本研究結果顯示加入 PEG-b-PSBMA於固態高分子電解質後，能顯著改善電池之電化學性能，並提供新的想法探討兩性離子對於改善電池性能之影響。

This study aims to synthesize a series of block-copolymers, PEG-b-PSBMA, consisting of PEG and zwitterionic segments with different ratios, and apply it in the solid polymer electrolyte (SPE) of lithium-ion batteries. The synthesis begins by preparing a chain transfer agent, CPADB, which reacts with methoxy polyethylene glycol (MPEG) via esterification to obtain macro-chain transfer agent, PEG-CPADB. Subsequently, RAFT polymerization is mediated by CPADB to copolymerize the zwitterion monomer, SBMA, with PEG-CPADB, resulting in the formation of the block-copolymer PEG-b-PSBMA. Finally, the copolymer is blended into polyethylene oxide (PEO) matrix to form the SPE. The structural confirmation of the compounds and segment ratios of the block-copolymer are analyzed by using 1H-NMR and FT-IR spectroscopy, while the molecular weight distribution is determined through GPC. Thermal stability of SPE is tested by TGA and DSC. The electrochemical properties of the SPE, including ionic conductivity, LSV, charge-discharge performance, and lithium-ion transference number, are evaluated using electrochemical measurements. At 80°C, solid polymer electrolyte showed the ionic conductivity with the value 5.43 × 10-4 S/cm, when blended PEG90-b-PSBMA40 into PEO matrix (The weight ratio of block copolymer and PEO is 1:100). It can be confirmed that the unique structure of zwitterion can enhance the dissociation of lithium salts inside the electrolyte and facilitate the migration of lithium ions within the battery. In addition, PEO blended with block copolymers can possess approximately 100% of the theoretical capacity of LiFePO4　cathode after first charging-discharging measurement. Value of lithium transference number can reach 0.211, when PEO matrix blended with PEG90-b-PSBMA30. The results of this study showed that blending PEG-b-PSBMA to the solid polymer electrolyte improve the electrochemical performance of the battery, and also provide more ideas to investigate associating effects of zwitterions on battery performance.

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