Solid Polymer Electrolytes from Crosslinked PEG and Dilithium N,N'-Bis(trifluoromethanesulfonyl)perfluoroalkane-1,ω-disulfonamide and Lithium Bis(trifluoromethanesulfonyl)imide Salts

2008 ◽  
Vol 73 (12) ◽  
pp. 1777-1798 ◽  
Author(s):  
Olt E. Geiculescu ◽  
Rama V. Rajagopal ◽  
Emilia C. Mladin ◽  
Stephen E. Creager ◽  
Darryl D. Desmarteau
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Minimum Energy ◽  
Ionic Conductivities ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Segmental Motion ◽  
Concentrated Electrolytes ◽  
Two Factors ◽  
Poly Ethylene

The present work consists of a series of studies with regard to the structure and charge transport in solid polymer electrolytes (SPE) prepared using various new bis(trifluoromethanesulfonyl)imide (TFSI)-based dianionic dilithium salts in crosslinked low-molecular-weight poly(ethylene glycol). Some of the thermal properties (glass transition temperature, differential molar heat capacity) and ionic conductivities were determined for both diluted (EO/Li = 30:1) and concentrated (EO/Li = 10:1) SPEs. Trends in ionic conductivity of the new SPEs with respect to anion structure revealed that while for the dilute electrolytes ionic conductivity is generally rising with increased length of the perfluoroalkylene linking group in the dianions, for the concentrated electrolytes the trend is reversed with respect to dianion length. This behavior could be the result of a combination of two factors: on one hand a decrease in dianion basicity that results in diminished ion pairing and an enhancement in the number of charge carriers with increasing fluorine anion content, thereby increasing ionic conductivity while on the other hand the increasing anion size and concentration produce an increase in the friction/entanglements of the polymeric segments which lowers even more the reduced segmental motion of the crosslinked polymer and decrease the dianion contribution to the overall ionic conductivity. DFT modeling of the same TFSI-based dianionic dilithium salts reveals that the reason for the trend observed is due to the variation in ion dissociation enthalpy, derived from minimum-energy structures, with respect to perfluoroalkylene chain length.

scholarly journals Electrospun poly(ethylene oxide) nanofibrous composites with enhanced ionic conductivity as flexible solid polymer electrolytes

High Voltage ◽  
2017 ◽  
Vol 2 (1) ◽  
pp. 25-31 ◽  
Author(s):  
Jun‐Wei Zha ◽  
Na Huang ◽  
Kang‐Qiang He ◽  
Zhi‐Min Dang ◽  
Chang‐Yong Shi ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Ethylene Oxide ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Ionic conductivity in polyethylene-b-poly(ethylene oxide)/lithium perchlorate solid polymer electrolytes

2007 ◽  
Vol 53 (4) ◽  
pp. 1503-1511 ◽  
Author(s):  
L.A. Guilherme ◽  
R.S. Borges ◽  
E. Mara S. Moraes ◽  
G. Goulart Silva ◽  
M.A. Pimenta ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Ethylene Oxide ◽  
Polymer Electrolytes ◽  
Lithium Perchlorate ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

scholarly journals Solid Polymer Electrolytes Derived from Crosslinked Polystyrene Nanoparticles Covalently Functionalized with a Low Lattice Energy Lithium Salt Moiety

2020 ◽  
Vol 4 (3) ◽  
pp. 44
Author(s):  
Xinyi Mei ◽  
Wendy Zhao ◽  
Qiang Ma ◽  
Zheng Yue ◽  
Hamza Dunya ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Room Temperature ◽  
Lithium Salt ◽  
Lattice Energy ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Polystyrene Nanoparticles ◽  
Crosslinked Polystyrene ◽  
Poly Ethylene

Three new crosslinked polystyrene nanoparticles covalently attached with low lattice energy lithium salt moieties were synthesized: poly(styrene lithium trifluoromethane sulphonyl imide) (PSTFSILi), poly(styrene lithium benzene sulphonyl imide) (PSPhSILi), and poly(styrene lithium sulfonyl-1,3-dithiane-1,1,3,3-tetraoxide) (PSDTTOLi). A series of solid polymer electrolytes (SPEs) were formulated by mixing these lithium salts with high molecular weight poly(ethylene oxide), poly(ethylene glycol dimethyl ether), and lithium bis(fluorosulfonyl)imide. The crosslinked nano-sized polymer salts improved film strength and decreased the glass transition temperature (Tg) of the polymer electrolyte membranes. An enhancement in both ionic conductivity and thermal stability was observed. For example, the SPE film containing PSTFSILi displayed ionic conductivity of 7.52 × 10−5 S cm−1 at room temperature and 3.0 × 10−3 S cm−1 at 70 °C, while the SPE film containing PSDTTOLi showed an even better performance of 1.54 × 10−4 S cm−1 at room temperature and 3.23 × 10−3 S cm−1 at 70 °C.

Role of Free Volumes and Segmental Dynamics on Ion Conductivity of PEO/LiTFSI Solid Polymer Electrolytes Filled with SiO2 Nanoparticles: A Positron Annihilation and Broadband Dielectric Spectroscopy Study

2021 ◽  
Author(s):  
Pranav Utpalla ◽  
Sandeep Kumar Sharma ◽  
S. K. Deshpande ◽  
Jitendra Bahadur ◽  
Debasis Sen ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Sio2 Nanoparticles ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Segmental Dynamics ◽  
Broadband Dielectric Spectroscopy ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Limited ionic conductivity of polymer electrolytes is a major issue in their industrial application. Enhancement in ionic conductivity in Poly (ethylene oxide), PEO, based electrolyte have been achieved by loading...

Effects of LiClO4 on the Characteristics and Ionic Conductivity of the Solid Polymer Electrolytes Composed of PEO, LiClO4 and PLiAA

2013 ◽  
Vol 743-744 ◽  
pp. 53-58 ◽  
Author(s):  
Rui Yang ◽  
Shi Chao Zhang ◽  
Lan Zhang ◽  
Xiao Fang Bi
Keyword(s):  
Ionic Conductivity ◽  
Ethylene Oxide ◽  
Polymer Electrolytes ◽  
Electrochemical Stability ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Poly Ethylene Oxide ◽  
Electrochemical Stability Window ◽  
Poly Ethylene

Solid polymer electrolytes (SPEs) which were composed of poly (ethylene oxide) (PEO), poly (lithium acrylate) (PLiAA), and LiClO4were prepared in order to investigate the influence of LiClO4content on the ionic conductivity of the electrolyte. All of the membranes were investigated by XRD, DSC, and EIS, et.al. The dependence of SPEs conductivity on temperature was measured, and the maximum ionic conductivity is 5.88×10-6S/cm at 293 K for membrane which is composed of PEO+PLiAA+15wt% LiClO4. The electrochemical stability window of the PEO+PLiAA+15wt% LiClO4is 4.75 V verse Li.

Holey graphene oxide as filler to improve electrochemical performance of solid polymer electrolytes

2019 ◽  
Vol 9 (9) ◽  
pp. 1055-1061
Author(s):  
Qi Wang ◽  
Zhoujie Zhang ◽  
Fei Shen ◽  
Bin Zhao ◽  
Xiaogang Han
Keyword(s):  
Graphene Oxide ◽  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Lithium Ion ◽  
Solid Polymer Electrolytes ◽  
Cycle Performance ◽  
Solid Polymer ◽  
Electrochemical Window ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene

Solid polymer electrolytes (SPE) have attracted wide attention of researchers because of their high safety performance and high mechanical strength. In this paper, holey graphene oxide (HGO) was added to poly(ethylene oxide) (PEO) solid polymer electrolytes with lithium bis(trifluoromethane sulfonimide) (LiTFSI) as salt to improve the ionic conductivity of solid polymer electrolytes. It was shown that the addition of holey graphene oxide improved the electrochemical window and ionic conductivity. When the amount of holey graphene oxide was 0 wt%, the ionic conductivity was 2.06 × 10–4 S/cm at 60 °C. In comparison, when the amount of holey graphene oxide was 0.2 wt%, the ionic conductivity was greatly increased to 6.05 × 10–4 S/cm. This was mainly due to the fact that addition of holey graphene oxide reduced the crystallization of polymer and promoted the migration of lithium ion. Meanwhile, the electrochemical window was expanded to 5.2 V and the cycle performance for the batteries was also improved.

scholarly journals Effect of Chemical Structure and Salt Concentration on the Crystallization and Ionic Conductivity of Aliphatic Polyethers

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 452 ◽  
Author(s):  
Jorge Olmedo-Martínez ◽  
Leire Meabe ◽  
Andere Basterretxea ◽  
David Mecerreyes ◽  
Alejandro Müller
Keyword(s):  
Ionic Conductivity ◽  
Polymer Electrolytes ◽  
Crystallization Rate ◽  
Solid Polymer Electrolytes ◽  
Solid Polymer ◽  
Degree Of Crystallinity ◽  
Electrochemical Window ◽  
Poly Ethylene Oxide ◽  
Poly Ethylene ◽  
The Degree Of Crystallinity

Poly(ethylene oxide) (PEO) is the most widely used polymer in the field of solid polymer electrolytes for batteries. It is well known that the crystallinity of polymer electrolytes strongly affects the ionic conductivity and its electrochemical performance. Nowadays, alternatives to PEO are actively researched in the battery community, showing higher ionic conductivity, electrochemical window, or working temperature range. In this work, we investigated polymer electrolytes based on aliphatic polyethers with a number of methylene units ranging from 2 to 12. Thus, the effect of the lithium bis(trifluoromethanesulfone) imide (LiTFSI) concentration on the crystallization behavior of the new aliphatic polyethers and their ionic conductivity was investigated. In all the cases, the degree of crystallinity and the overall crystallization rate of the polymers decreased drastically with 30 wt % LiTFSI addition. The salt acted as a low molecular diluent to the polyethers according to the expectation of the Flory–Huggins theory for polymer–diluent mixtures. By fitting our results to this theory, the value of the interaction energy density (B) between the polyether and the LiTFSI was calculated, and we show that the value of B must be small to obtain high ionic conductivity electrolytes.

Study of a novel gel electrolyte based on poly-(methoxy/hexadecyl-poly(ethylene glycol) methacrylate) co-polymer plasticized with 1-butyl-3-methylimidazolium tetrafluoroborate

RSC Advances ◽  
2014 ◽  
Vol 4 (68) ◽  
pp. 36357-36365 ◽  
Author(s):  
Long Wang ◽  
Hua-jun Zhu ◽  
Wei Zhai ◽  
Feng Cai ◽  
Xiao-min Liu ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Ethylene Glycol ◽  
Polymer Electrolytes ◽  
Solid Polymer Electrolytes ◽  
Gel Electrolyte ◽  
Solid Polymer ◽  
Gel Polymer Electrolytes ◽  
Poly Ethylene Glycol ◽  
Glycol Methacrylate ◽  
Poly Ethylene

Compared with traditional liquid electrolytes, solid polymer electrolytes possess higher reliability and safety but lower ionic conductivity, which can be improved by incorporating plasticizers to form gel polymer electrolytes (GPEs).

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