A Novel Li+-Conducting Polymer Membrane Gelled by Fluorine-Free Electrolyte Solutions for Li-Ion Batteries

被引:10
作者
Navarra, Maria Assunta [1 ]
Tsurumaki, Akiko [1 ]
Vitucci, Francesco Maria [2 ]
Paolone, Annalisa [2 ]
Palumbo, Oriele [2 ]
Panero, Stefania [1 ]
机构
[1] Sapienza Univ Rome, Dept Chem, Piazzale Aldo Moro 5, I-00185 Rome, Italy
[2] Sapienza Univ Rome, CNR, ISC, UOS, Piazzale Aldo Moro 5, I-00185 Rome, Italy
关键词
gel polymer electrolytes; energy storage; one-pot synthesis; lithium-ion batteries; BIS(OXALATO) BORATE; LITHIUM BATTERIES; THERMAL-BEHAVIOR; LIQUID; LIBOB; PVDF; SN; SPECTROSCOPY; ADDITIVES; SALTS;
D O I
10.1002/batt.202000078
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Gel polymer electrolytes (GPEs), composed of poly(vinylidene fluoride) (PVdF), a ternary solvent of ethylene carbonate : propylene carbonate : dimethyl carbonate, and LiBOB, which are characterized by a novel composition with a fluorine-free lithium salt, are here proposed. GPEs were firstly prepared through a solution casting procedure using the ternary carbonate solution as a solvent (namedex situprepared membranes), and then activated by being immersed in a 0.7 M LiBOB-carbonate solution. Fundamental characterizations, including thermal, spectroscopical, mechanical, and electrochemical analyses, were carried out and compared before and after the activation. GPEs, having the same composition, were also prepared by using a novel procedure (namedin situprepared membranes), involving the formation of PVdF membrane and its activation by the LiBOB electrolyte, as well as subsequent electrochemical characterizations, in the same T-shape cell. Thus prepared lithium-ion batteries, employing Sn-C and LiFePO(4)electrodes, were demonstrated to exhibit a high capacity of 150 mAh g(-1) through the course of cycling.
引用
收藏
页码:1112 / 1119
页数:8
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