本文選題：全固態(tài)鋰離子電池 + 固體電解質(zhì)　； 參考：《中南大學(xué)》2014年碩士論文

【摘要】：摘要：傳統(tǒng)鋰離子電池由于使用易揮發(fā)、易燃的電解液,存在嚴(yán)重的安全隱患。使用固體電解質(zhì)的鋰離子電池在改善安全性能的同時還能實現(xiàn)外形多樣化加工。本文合成了一種金屬有機(jī)框架MOF-5多孔材料,作為聚氧乙烯(PEO)基固體電解質(zhì)的填料。另外,制備了一種類PEO交聯(lián)型固體電解質(zhì)。基于這兩種電解質(zhì),組裝了全固態(tài)鋰離子電池。主要結(jié)果如下： 1.X射線衍射和掃描電鏡結(jié)果表明,使用滴加溶劑熱法和直接溶劑熱法分別合成了微米級多孔MOF-5材料。激光粒度分析結(jié)果表明,使用滴加溶劑熱法制備的MOF-5粒度分布明顯窄于直接溶劑熱法�；贛OF-5為填料的PEO固體電解質(zhì)LiFePO4/Li電池在80℃及1C倍率下,首次放電比容量為110mAhg-1,循環(huán)120圈后,放電比容量為98.5mAhg-1。 2.通過Y-縮水甘油醚氧丙基三甲氧基硅烷中的甲氧基和聚乙二醇(分子量600)中的羥基反應(yīng)形成了交聯(lián)型固體聚合物。將該聚合物與雙(三氟甲基磺酰)亞胺鋰經(jīng)過物理共混,然后熱壓成半透明狀固體電解質(zhì)薄膜。當(dāng)氧乙烯單元(EO)：Li=20：1時,該電解質(zhì)在25℃的電導(dǎo)率為3.15×10-5S cm-1,分解溫度為300℃。使用該電解質(zhì)組裝的LiFePO/Li電池在80-140℃之間具有良好的倍率循環(huán)性能。在120℃時,電池1C循環(huán)的初始放電比容量和100圈后放電比容量分別為157mAhg-1和92.8mAh g-1.
[Abstract]:Abstract: because of the volatile and flammable electrolyte, the traditional lithium ion battery has serious safety problems. Lithium ion batteries using solid electrolytes can improve safety performance and can be processed in a variety of shapes at the same time. In this paper, a metal-organic framework MOF-5 porous material was synthesized as a filler for polyoxyethylene oxide (PEO-based)-based solid electrolytes. In addition, a kind of PEO crosslinked solid electrolyte was prepared. Based on these two electrolytes, all solid state lithium ion batteries were assembled. The main results are as follows: 1. The results of X-ray diffraction and scanning electron microscopy show that micrometer porous MOF-5 materials have been synthesized by drop addition solvothermal method and direct solvothermal method, respectively. The results of laser particle size analysis show that the particle size distribution of MOF-5 prepared by drop addition solvothermal method is obviously narrower than that of direct solvothermal method. The first discharge specific capacity of PEO solid electrolyte LiFePO4/Li battery based on MOF-5 was 110 mAhg-1 at 80 鈩，

本文編號：1866950