語系:
繁體中文
English
說明(常見問題)
圖資館首頁
登入
回首頁
切換:
標籤
|
MARC模式
|
ISBD
Hybrid Polymer Electrolyte Membranes...
~
Clarkson University.
Hybrid Polymer Electrolyte Membranes Incorporating Ether-Derivatized Ionic Liquid and Glyme-Complex of Lithium Salt.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Hybrid Polymer Electrolyte Membranes Incorporating Ether-Derivatized Ionic Liquid and Glyme-Complex of Lithium Salt.
作者:
Wang, Yanni.
出版者:
Ann Arbor : ProQuest Dissertations & Theses, 2018
面頁冊數:
275 p.
附註:
Source: Dissertation Abstracts International, Volume: 80-03(E), Section: B.
附註:
Adviser: Sitaraman Krishnan.
Contained By:
Dissertation Abstracts International80-03B(E).
標題:
Chemical engineering.
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10745815
ISBN:
9780438507579
Hybrid Polymer Electrolyte Membranes Incorporating Ether-Derivatized Ionic Liquid and Glyme-Complex of Lithium Salt.
Wang, Yanni.
Hybrid Polymer Electrolyte Membranes Incorporating Ether-Derivatized Ionic Liquid and Glyme-Complex of Lithium Salt.
- Ann Arbor : ProQuest Dissertations & Theses, 2018 - 275 p.
Source: Dissertation Abstracts International, Volume: 80-03(E), Section: B.
Thesis (Ph.D.)--Clarkson University, 2018.
Lithium ion batteries (LIBs) are attractive as energy storage devices because of their higher volumetric and gravimetric energy densities than the nickel metal hydride batteries that are currently used in hybrid vehicles. However, conventional lithium ion battery electrolytes are volatile and flammable liquids, and therefore, limit the durability and temperature range of operation of the device. Any event that breaks the battery's hermetic seal could result in a fire due to the low flash point of conventional electrolytes.
ISBN: 9780438507579Subjects--Topical Terms:
206267
Chemical engineering.
Hybrid Polymer Electrolyte Membranes Incorporating Ether-Derivatized Ionic Liquid and Glyme-Complex of Lithium Salt.
LDR
:06136nmm a2200349 4500
001
547540
005
20190513114555.5
008
190715s2018 ||||||||||||||||| ||eng d
020
$a
9780438507579
035
$a
(MiAaPQ)AAI10745815
035
$a
(MiAaPQ)clarkson:10205
035
$a
AAI10745815
040
$a
MiAaPQ
$c
MiAaPQ
100
1
$a
Wang, Yanni.
$3
826836
245
1 0
$a
Hybrid Polymer Electrolyte Membranes Incorporating Ether-Derivatized Ionic Liquid and Glyme-Complex of Lithium Salt.
260
1
$a
Ann Arbor :
$b
ProQuest Dissertations & Theses,
$c
2018
300
$a
275 p.
500
$a
Source: Dissertation Abstracts International, Volume: 80-03(E), Section: B.
500
$a
Adviser: Sitaraman Krishnan.
502
$a
Thesis (Ph.D.)--Clarkson University, 2018.
520
$a
Lithium ion batteries (LIBs) are attractive as energy storage devices because of their higher volumetric and gravimetric energy densities than the nickel metal hydride batteries that are currently used in hybrid vehicles. However, conventional lithium ion battery electrolytes are volatile and flammable liquids, and therefore, limit the durability and temperature range of operation of the device. Any event that breaks the battery's hermetic seal could result in a fire due to the low flash point of conventional electrolytes.
520
$a
The focus of this research is to design, synthesize, and establish structure--property correlations in lithium-ion conducting PEGylated membranes imbibed with ionic liquids (ILs) and a tetraglyme complex of lithium bis(trifluoromethyl)sulfonamide, toward developing rubber-like mechanically robust and thermally stable mebranes with relatively high lithium ion conductivity. The study reported in this dissertation can be divided into three parts. In the first part, three ether-derivatized ILs, whose cations are based on imidazolium, pyrrolidinium, and ammonium moieties, were synthesized, and their thermal and physicochemical properties were characterized. The anion was bis(trifluoromethyl)sulfonamide (bistriflamide, [Tf2N]). Three analogous alkylated ILs were synthesized and evaluated as references. The imidazolium ILs were denser, less viscous, and more ionic conductive than pyrrolidinium and ammoniumILs. The ether-derivatized ILs exhibited lower viscosity and higher ionic conductivity than the corresponding alkylated ILs. The dissolution of LiTf2N into the ILs (0.65 mmol g--1 concentration) resulted in a decrease in the ionic conductivity due to an increase in the viscosity of the solution over that of the neat IL. Raman spectroscopy showed that the ether-derivatized IL supported the dissociation of LiTf2N into Li+ ions with [Tf_2 N]-- and the degree of dissociation increased with a decrease in the concentration of LiTf 2N.
520
$a
In the second part of the study, 1-(2-methoxyethyl)-3-methylimidazolium bis(trifluroromethanesulfonyl)amide ([mEtMeIm][Tf2N], one of six ILs investigated in the first part) was blended with 1:1 complex of LiTf 2N and tetraethylene glycol dimethyl ether (tetraglyme, G4), denoted herein by [Li(G4)][Tf2N], to improve the conductivity of the electrolyte based on [Li(G4)][Tf2N] alone. The addition of [mEtMeIm][Tf 2N] to [Li(G4)][Tf2N] lowered the viscosity and increased the ionic conductivity of the blends. The blends also exhibited improved thermal stability in thermogravimetry experiments. The addition of unchelated LiTf 2N to [mEtMeIm][Tf2N] resulted in a decrease in ionic conductivity at all temperatures of measurement. However, when LiTf2N was added as a 1:1 complex with G4, the conductivity was higher, at the same molar concentration of LiTf2N. We also found that the complex mixture, comprising of three different ionic species (the lithium ion, and the ionic liquid cation and anion) and one nonionic compound (tetraglyme), of significantly different chemical structures and polarities, showed nearly linear mixing rules for density, viscosity and conductivity data.
520
$a
In the third part, a series of copolymer membranes, composed of poly(ethylene glycol) diacrylate (PEGDA) and different mole fractions of each of the three different Tg-modifying comonomers, 2-methoxyethyl acrylate (MEA), n-butyl acrylate (BA), and ethyl acrylate (EA), were prepared and characterized through dynamic mechanical analysis. For each comonomer, the glass transition temperature based on tan delta peak, as well as the activation energy of glass transition, determined using the single-frequency Chang, Thomas, and Sperling approach, decreased with an increase in the concentration of the comonomer. The Tg and activation energy of PEGDA-BA copolymer membranes were lower, at a given molar concentration of BA, than the other two PEGDA-comonomer membranes, with the same comonomer molar concentration. To impart ion conductivity to the membranes, [mEtMeIm][Tf 2N] and [Li(G4)][Tf2N] were incorporated in the polymer matrix. The effects of the type of comonomer, the comonomer concentrations in the copolymer matrix, and the presence of the [mEtMeIm][Tf2N] and G4, on ionic conductivity and mechanical properties were investigated. Among the three comonomers, ethyl acrylate had a lower plasticization effect on the polymer electrolyte membranes, but showed a larger enhancement in ionic conductivity, related to its lower activation energy of polymer segmental motion. It was found that membranes containing both [Li(G4)][Tf2N] and [mEtMeIm][Tf 2N] exhibited the highest ionic conductivity. Ionic conductivity values of 4.6 microS•cm--1 at 10 °C and 589.4 microS•cm --1 at 85 °C, along with the Young's modulus of 31 MPa and elongation at break of about 10%, were achieved.
520
$a
The polymer membranes with good ionic conductivity, thermal stability, and mechanical toughness developed in this research seem promising as electrolytes for lithium ion batteries over a relatively wide temperature range.
590
$a
School code: 0049.
650
4
$a
Chemical engineering.
$3
206267
650
4
$a
Engineering.
$3
210888
690
$a
0542
690
$a
0537
710
2
$a
Clarkson University.
$b
Chemical Engineering.
$3
826837
773
0
$t
Dissertation Abstracts International
$g
80-03B(E).
790
$a
0049
791
$a
Ph.D.
792
$a
2018
793
$a
English
856
4 0
$u
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10745815
筆 0 讀者評論
全部
電子館藏
館藏
1 筆 • 頁數 1 •
1
條碼號
館藏地
館藏流通類別
資料類型
索書號
使用類型
借閱狀態
預約狀態
備註欄
附件
000000163719
電子館藏
1圖書
學位論文
TH 2018
一般使用(Normal)
在架
0
1 筆 • 頁數 1 •
1
多媒體
多媒體檔案
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10745815
評論
新增評論
分享你的心得
Export
取書館別
處理中
...
變更密碼
登入