發(fā)布時(shí)間：2018-02-20 04:11

  本文關(guān)鍵詞： 鋰離子電池 凝膠聚合物 電解質(zhì) 離子液體　出處：《哈爾濱理工大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：鋰離子電池誕生于20世紀(jì)末，因其性能優(yōu)越而備受親睞。近年來，商用鋰離子電池中液體電解質(zhì)因其漏液而頻發(fā)事故，迫使人們尋求新的材料來替代液體電解質(zhì)，以解決這類問題。根據(jù)物質(zhì)的三種狀態(tài)研究發(fā)現(xiàn)，固體電解質(zhì)由于多種限制因素的影響并不能達(dá)到實(shí)際應(yīng)用，因此介于固、液態(tài)間的凝膠電解質(zhì)引起了人們的關(guān)注。 本文選擇溴化N-甲基-N-丙基哌啶(Pp_(13)Br)、溴化N-甲基-N-丁基哌啶(Pp_(14)Br)、溴化N-甲基-N-丙基吡咯烷(Py_(13)Br)和溴化N-甲基-N-丁基吡咯烷(Py_(14)Br)四種物質(zhì)與雙三氟甲磺酰亞胺基鋰(LiTFSI)搭配反應(yīng)得到四種離子液體：N-甲基-N-丙基哌啶雙三氟甲磺酰亞胺(Pp_(13)TFSI)、N-甲基-N-丁基哌啶雙三氟甲磺酰亞胺(Pp_(14)TFSI)、 N-甲基-N-丙基吡咯烷雙三氟甲磺酰亞胺(Py_(13)TFSI)、N-甲基-N-丁基吡咯烷雙三氟甲磺酰亞胺(Py_(14)TFSI)。 利用原位法，以甲基丙烯酸甲酯(MMA)、離子液體(Pp_(13)TFSI、Pp_(14)TFSI、Py_(13)TFSI、Py_(14)TFSI)、鋰鹽(LiTFSI)、交聯(lián)劑乙二醇二甲基丙烯酸酯(EDMA)和引發(fā)劑過氧化苯甲酰(BPO)為原料，制備了凝膠聚合物電解質(zhì)膜(GPE)。GPE中的基體為聚甲基丙烯酸甲酯(PMMA)。 采用線性掃描伏安曲線(LSV)法、X射線衍射(XRD)法、差式量熱法(DSC)、原子力顯微鏡(AFM)、充放電循環(huán)等方法對(duì)Pp_(13)TFSI/LiTFSI/PMMA電解質(zhì)膜、Pp_(14)TFSI/LiTFSI/PMMA電解質(zhì)膜、Py_(13)TFSI/LiTFSI/PMMA電解質(zhì)膜、Py_(14)TFSI/LiTFSI/PMMA電解質(zhì)膜這四種不同類型的凝膠聚合物電解質(zhì)膜各種性能進(jìn)行測(cè)試。測(cè)試結(jié)果表明，四種不同類型的凝膠聚合物電解質(zhì)膜各自對(duì)應(yīng)的電化學(xué)穩(wěn)定窗口值分別為4.5V、4.2V、5.0V、5.2V，符合鋰離子電池對(duì)膜的穩(wěn)定電壓的要求，同時(shí)，得到的Py_(13)TFSI/LiTFSI/PMMA電解質(zhì)膜和Py_(14)TFSI/LiTFSI/PMMA電解質(zhì)膜的穩(wěn)定性比Pp_(13)TFSI/LiTFSI/PMMA和Pp_(14)TFSI/LiTFSI/PMMA的穩(wěn)定性更好。除此以外，，Pp_(13)TFSI/LiTFSI/PMMA電解質(zhì)膜、Pp_(14)TFSI/LiTFSI/PMMA電解質(zhì)膜、Py_(13)TFSI/LiTFSI/PMMA電解質(zhì)膜、Py_(14)TFSI/LiTFSI/PMMA電解質(zhì)膜這四種不同類型的凝膠聚合物電解質(zhì)膜各自的首次充電比容量分別為132.1mAh/g、144.0mAh/g、160.3mAh/g、164.5mAh/g。
[Abstract]:Lithium-ion battery (Li-ion battery) was born at the end of 20th century, and it is popular for its superior performance. In recent years, liquid electrolytes in commercial lithium-ion batteries have been subjected to frequent accidents due to their leakage, forcing people to seek new materials to replace liquid electrolytes. In order to solve this kind of problem, according to the study of three states of substance, it is found that solid electrolyte can not be used in practice because of the influence of many limiting factors, so the gel electrolyte between solid and liquid has attracted people's attention. N- methyl-N- propyl piperidine bromide (N- methyl-N- propyl piperidine), N- methyl-N- Ding Ji piperidine piperidine bromide, N- methyl-N- propyl pyrrolidine (Pyrrolium) and N- methyl-N- methyl-N-methyl-pyrrolidine pyrrolidine pyrrolidine-Pyrrolium-14 Br-) are selected to match with bisfluoromethyl sulfidylithiocarbamate (LiTFSII) in this paper. The two substances are N- methyl-N- propyl piperidine bromide (N- methyl-N-propylpyrrolidine) and N- methyl-N-propylpyrrolidine bromide. Four ionic liquids, N- methyl-N- propyl piperidine bis-trifluoromethyl sulfonimide (PpS), PpS, PpS, N- methyl-N--Ding Ji-piperidine, piperidine bis-trifluoromethyl sulfonyl-imide, N- methyl-N- propylpyrrolidine-bis-trifluoromethane-pyrrolidine-pyrrolidine-trifluoromethyl-pyrrolidine-pyrrolidine-Nmethyl-N#china_person1#-pyrrolidine bis-trifluoromethyl-pyrrolidine-pyrrolidine-pyrrolidine. Trifluoromethylsulfonimide (TSF). Using in situ method, using methyl methacrylate (MMA), ionic liquid (Ionic liquid) (Ionic liquid), and ionic liquid (Ionic liquid), as raw materials, the following materials were used as raw materials: methyl methacrylate (MMA), ionic liquid (IPL) 13TFSIP, TFSI14, LiTFSIM, crosslinker EDMAand initiator, benzoyl peroxide (BPO). The matrix of the gel polymer electrolyte membrane (GPE-GPE. GPE) was prepared by polymethyl methacrylate (PMMA). The linear scanning voltammetry (LSVV) method and X-ray diffraction (XRD) method were used. Differential calorimetry (DSC), atomic force microscopy (AFM), charge / discharge cycles and other methods were used to test the various properties of four different types of gel polymer electrolyte membranes, namely, Pp_(13)TFSI/LiTFSI/PMMA electrolyte membrane PpS / LiTFSI14 / LiTFSIP / PMMA electrolyte membrane, Pystani / LiTFSI13 / PMMA electrolyte membrane, Pystav / LiTFSIR / PMMA electrolyte membrane, four different types of gel polymer electrolyte membranes. The corresponding electrochemical stability window values of the four different types of gel polymer electrolyte membranes are 4.5V ~ 4.2V ~ 5.0V ~ 5.2V respectively, which meet the requirements of the lithium ion battery for the stability voltage of the membrane, at the same time, The stability of the obtained Py_(13)TFSI/LiTFSI/PMMA electrolyte membrane and Py_(14)TFSI/LiTFSI/PMMA electrolyte membrane is better than that of Pp_(13)TFSI/LiTFSI/PMMA and Pp_(14)TFSI/LiTFSI/PMMA. In addition, the Py_(13)TFSI/LiTFSI/PMMA / LiTFSI / PMMA electrolyte membrane has better stability than that of Pp_(13)TFSI/LiTFSI/PMMA and Pp_(14)TFSI/LiTFSI/PMMA. Their initial charging capacity was 132.1 mg / g 144.0 mg / g = 160.3 mg / g / g = 164.5 mg / g respectively.
【學(xué)位授予單位】：哈爾濱理工大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM912;O646

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