本研究使用高分子塗層碳材和矽材，測試矽材高分子塗層對所製
備矽碳電極效能的影響，使用高分子塗層可以利用碳材和矽材表面電
荷相異，使矽材能分散在碳材表面，有效分散奈米矽能避免矽鋰化過
程的高體積膨脹造成電極損害。高分子塗層也可能兼具人工固體電解
質中間相層角色，可能減少電極的電阻。研究先分析 MCMB 碳材粒
徑，球磨處理等操作參數的影響，結果顯示當碳越多小粒徑尺寸，會
有電極電容量提升和庫倫效率降低的效果，但對電極循換壽命無顯著
助益。
研究分析使用邱昱誠教授研究室的自修復高分子作為矽塗層，期
望高分子藉由氫鍵或共價鍵生成的自修復特性，減少鋰化矽膨脹造成
電極損害。結果顯示使用丙烯酸丁酯和正羥甲基丙烯醯胺組成的高分
子塗層對矽碳電極效能無提升作用，顯示只依賴氫鍵自修復功能的高
分子塗層矽材無法有效延長電極壽命。當使用添加苯乙烯或甲基丙烯
酸磺基甜菜鹼的高分子組成，可以提升高分子應力，也使得電極電容
量提升，其中以添加 10%苯乙烯的高分子可以獲最佳循環充放電穩定
性和電容量。進一步測試比較此高分子的分子量與塗層用量比例的影
響，結果顯示測試組內的分子量對電極表現沒顯著影響，而隨著高分
子塗層用量增加，矽碳電極的庫倫效率和循環穩定性有較佳的提升效
果。

This study applies polymer coating on carbon(MCMB) and silicon for
fabricating Si-C composite electrode. Polymer coating can change surface
charge of silicon and MCMB for their to assemble via electrostatic
attaction. Effective dispersion of nanosilicon on MCMB can reduce
damage to electrode from high volume expansion of lithiated silicon.
Polymer coating can also function as artificial solid electrolyte interphase
to reduce electrode resistance. Firstly, this study discusses the influence of
MCMB particle size and ball milling treatment. The results show that
smaller MCMB can induce higher capacity but lower coulombic efficiency
of electrode, and the electrode cyclic life is not improved.
This study also examines using self-healing polymer(SHP, from
professor Chiu’s lab) to coat silicon particles, expecting SHP to maintain
electrode structure. When lithiated silicon expands, SHP can possibly help
restoring electrode to its original structure and consequently reduced
electrodes damage. The results show that SHP of random polymer of Butyl
acrylate(BA) and N-methylolacrylamide(NMA) cannot improve electrode
performance. However, the electrodes can have a higher capacity when
sulfobetaine methacrylate(SBMA) and styrene(St) is included partly
replace replace BA. The SHP containing 10%St achieves the best cyclic
life and capacity among all polymer coating examined in this study. The
influences of molecular weight(MW) and polymer coating proportion
using 10%St-SHP are examined. Results showed that the MW examined
does not cause significant influence but increasing polymer coating
proportion results in electrode of improved coulombic efficiency and
cyclic life.

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