摘要:

AbstractIn recent years there has been a continuously growing interest in the development and characterization of polymeric materials having a fast ionic transport. If prepared in the form of thin films, these materials behave as very convenient electrolytic separators for the realization of advanced design, plastic‐like, electrochemical power sources. Various classes of these polymer ionics have been developed and today many choices are available for the realization of devices with different energy and power capabilities. In this paper we describe the properties of a class of composite polymer ionic conductors having improved mechanical and electrochemical properties and which appear particularly suitable for the realization of high‐energy, rechargeable lithium batter

ISSN:1042-7147    

DOI:10.1002/pat.1993.220040221

出版商:John Wiley&Sons, Ltd.    

年代:1993

数据来源: WILEY

摘要:

AbstractGel‐type solid polymer electrolytes (SPE) which consisted of LiBF4as the electrolyte, a mixture of propylene carbonate and 1,2‐dimethoxyethane as the solvents, and a mixture of ethoxypolyoxyethyleneacrylate and trimethylolpropanetriacrylate as the monomers, were prepared by photopolymerization. The composition range for the gelation and the SPE formation was defined. Relationships between the composition of the SPE, and the ionic conductivity and modulus were clarified. The ionic conductivity of the SPE film, the composition of which was 13 wt% monomer, 20 wt% LiBF4and 67 wt% solvent, was 2.7 × 10‐3S/cm, and the modulus was 103dyn/cm2at 25°C. When a polyaniline(PANI)/SPE interface was formed on polyaniline films by photopolymerization at the optimal composition, the redox behavior of PANI was almost equivalent to that in nonaqueous electrolyte solutions. The discharge capacity of a Li/SPE/PANI film rechargeable battery was 116 mAh/g‐PANI (based on the weight of PANI), almost the same as that of a Li/nonaqueous electrolyte solution/

ISSN:1042-7147    

DOI:10.1002/pat.1993.220040222

出版商:John Wiley&Sons, Ltd.    

年代:1993

数据来源: WILEY

摘要:

AbstractTwo approaches for the preparation of highly ionconductive polymeric solid electrolytes have been followed: one was to add crown ether to cross‐linked poly(ethylene oxide) grafted methacrylate polymer swollen by lithium salt/propylene carbonate solution; and the other was to select crosslinked poly(dimethylsiloxane) with a low glass transition temperature for the matrix material. The conductivity of the former electrolyte was 3.2 × 10−3S/cm even in the absence of crown ether at 20°C and increased to 4.0 × 10−3S/cm by the addition of 15‐Crown‐5. The addition of crown ether in the electrolyte also affected the plating and stripping processes of Lion Ni substrate. The latter electrolyte was prepared as a single ion type polymeric solid electrolyte. The conductivity of the electrolyte was ca 10−5S/cm at room temperature. The polarization curves of Li in the electrolyte were symmetric for O V vs. Li/Li+, therefore the plating and stripping of Li electrode in the electrolyte were reversible. The behavior of the latter electrolyte is preferable for rechargeable lithi

ISSN:1042-7147    

DOI:10.1002/pat.1993.220040223

出版商:John Wiley&Sons, Ltd.    

年代:1993

数据来源: WILEY