岐狀結構材料在鋰電池的應用;The applications of hyperbranched on Li ion batteries

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题名:	岐狀結構材料在鋰電池的應用;The applications of hyperbranched on Li ion batteries
作者:	李昱翰;Li,Yu-han
贡献者:	化學學系
关键词:	高分歧;寡聚物;hyperbranch;oligomer
日期:	2012-10-23
上传时间:	2012-11-12 14:26:29 (UTC+8)
出版者:	國立中央大學
摘要:	我們以雙酮衍生物為起始劑來製備雙馬來亞醯胺高分歧狀寡聚物。並探討其成長機制以及起使劑衍生物、反應時間等對離子動力學的影響。以雙酮衍生物為起始劑能夠有效的增加反應的轉化率而且能夠使其在較低的溫度下進行反應，增進了高分歧狀寡聚物的應用性。再者，我們設計了具有高度運動性之高分歧狀寡聚物應用於電池添加劑。由研究發現帶來電池循環穩定性以及安全性上升，特別是在55℃的高溫循環壽命，另外，也降低了電池的放熱量以及溫度，使電池內短路測試之溫度由700℃之高溫下降至85℃，大幅度提升了電池的安全性。此高分歧狀寡聚物確實可用來作為安全性添加劑，並且滿足了高性能高安全性鋰電池的應用。In this research, we use Diketone derivatives as initiator to prepare Bismaleimide-based Hybranched oligomer and also investigate the propagation mechanism、dynamic characters of Bismaleimide-based Hybranched oligomer affect by the ratio of initiators and the reaction time. The Diketone derivative as initiator can promote the conversion rate. It provides a better ways to promote the conversion rate of Bismaleimide at low temperature (130℃). These findings should be useful for practical application .Furthermore, we used the Hyperbranched oligomer as additive in the electrolyte to improve the safety features in lithium battery. We substitute the Hyperbranch Poly(bismaleimide) as N-Phenylmaleimide containing rich Hyperbranched oligomer to provide the Lithium ion mobility and diffusion rate. It presents less hindrance to Lithium ion transport. Not only can promote the electrochemical performance and safety, but also make the charge-transfer resistance drop down. We bring up a newly method to design a safety additives. To meet the usage of high performance and safety Li-ion batteries.
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