Thermally cured semi-interpenetrating electrolyte networks (s-IPN) for safe and aging-resistant secondary lithium polymer batteries

被引：94

作者：

Nair, Jijeesh R. ^{[1
]}

Destro, Matteo ^{[1
,2
]}

Bella, Federico ^{[1
]}

Appetecchi, Giovanni B. ^{[3
]}

Gerbaldi, Claudio ^{[1
]}

机构：

[1] Politecn Torino, Dept Appl Sci & Technol DISAT, CHENERGY Grp, GAME Lab, Corso Duca Abruzzi 24, I-10129 Turin, Italy

[2] LITHOPS Batteries Srl, Via Rocca 27, I-10123 Turin, Italy

[3] Agcy New Technol Energy & Sustainable Econ Dev, SSPT PROMAS MATPRO, ENEA, Via Anguillarese 301, I-00123 Rome, Italy

来源：

JOURNAL OF POWER SOURCES | 2016年 / 306卷

关键词：

Interpenetrating polymer network; Thermal polymerization; Polymer electrolyte; Lithium battery; Aging resistance; IONIC-CONDUCTIVITY; SALT-CONCENTRATION; GEL ELECTROLYTE; ENERGY; OXIDE; TRANSPORT; MEMBRANE; ECONOMY; GREEN; TEMPERATURE;

D O I：

10.1016/j.jpowsour.2015.12.001

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Truly solid polymer electrolyte membranes are designed by thermally induced free radical polymerisation. The overall membrane architecture is built on a semi-interpenetrating polymer network (s-IPN) structure, where a di-methacrylate oligomer is cross-linked (in situ) in the presence of a long thermoplastic. linear PEO chain and a supporting lithium salt to obtain a freestanding, flexible and non-tacky film. In the envisaged systems, the di-methacrylate functions as a soft cross-linker, thus avoiding physico-mechanical deformation of the s-IPNs at elevated temperature, without hampering the ionic conductivity. s-IPNs exhibit remarkable stability towards lithium metal and no traces of impurity are detected while testing their oxidation stability (4.7 V vs. Li/Li+) towards anodic potential. The newly elaborated system is also successfully tested at moderately high temperature in Li metal cells in which LiFePO4/C is used as the cathode active material, showing excellent indications of safe and highly durable electrolyte separator (i.e., 2000 cycles at reasonably high 1C rate). (C) 2015 Elsevier B.V. All rights reserved,

引用

页码：258 / 267

页数：10

共 55 条

[1] Definitions of terms relating to the structure and processing of sols, gels, networks, and inorganic-organic hybrid materials (IUPAC Recommendations 2007) [J].