Modern batteries. An introduction to electrochemical power sources

The application and the performance of a new type of poly͑ethylene oxide͒ ͑PEO͒-based gel electrolyte membrane in lithium-ion battery systems are presented and discussed. The compatibility of this PEO-based gel membrane toward composite graphite-based anode and LiCoO 2 -based cathode films, respectively, is first evaluated. Laminated, gel-type, graphite/LiCoO 2 lithium-ion prototypes are assembled using the PEO membrane as an electrolyte separator. The cycling performances of these prototypes are reported and discussed.

Section: Resultsmentioning

confidence: 98%

Investigation of Swelling Phenomena in Poly(ethylene oxide)-Based Polymer Electrolytes:

Appetecchi¹,

Aihara²,

Scrosati³

2003

“…Solvent-free, poly͑ethylene oxide͒ ͓P(EO)͔ n LiX complexes appear to be one of the most suitable electrolytes for the development of reliable lithium polymer batteries ͑LPBs͒. 5,6 These complexes are formed by dissolving a lithium salt, LiX, in a PEO polymer matrix 7 to form a true solid Li ϩ cation conductor. The basic structure of the P(EO) n LiX solvates involves the ether oxygens of the PEO chains coiled around the Li ϩ cations with the counter anions located nearby for electroneutrality.…”

mentioning

confidence: 99%

Poly(ethylene oxide) LiN(SO[sub 2]CF[sub 2]CF[sub 3])[sub 2] Polymer Electrolytes

Capiglia

Imanishi

Takeda

et al. 2003

The present report describes a Raman spectroscopy investigation of polymer electrolytes based on poly͑ethylene oxide͒ ͑PEO͒lithium bis͑perfluoroethylsulfonyl͒imide ͑LiBETI͒, LiN(SO 2 CF 2 CF 3 ) 2 . A wide range of ether oxygen/salt, EO/LiBETI, molar ratios extending from 2 to 50 was considered. The crystalline salt was also investigated and a preliminary assignment of the Raman peaks of the salt, pure and dissolved in PEO, is made. The analysis of the Raman spectra supports the suggested formation of a solvent-separated P(EO) 6(or 7) -LiBETI crystalline solvate. The highest conductivities of polymer electrolytes reported in previous works were for those electrolytes having compositions close to this solvate stoichiometry. The appearance of broad vibrational bands associated with amorphous PEO, even in very salt-diluted samples, confirms the ability of the BETI Ϫ anion to strongly affect the polymer morphology.

“…Solvent-free, poly͑ethylene oxide͒ P͑EO͒-LiX complexes appear to be one of the most suitable electrolytes for the development of reliable lithium polymer batteries ͑LPBs͒. 5,6 These complexes are formed by dissolving a lithium salt, LiX, in a PEO polymer matrix 7 to form a true solid lithium ion conductor. The basic structure of the P͑EO͒-LiX complexes involves the ether oxygens of the PEO chains coiled around the Li ϩ cations with the counter anions located nearby for electroneutrality.…”

mentioning

confidence: 99%

Poly(ethylene oxide)-LiN(SO[sub 2]CF[sub 2]CF[sub 3])[sub 2] Polymer Electrolytes

Appetecchi

Passerini

2002

The present report describes the investigation performed on the interface established between lithium metal and poly(ethylene oxide) (PEO)-lithium bis(perfluoroethysulfonyl)imide (LiBETI), normalLiNfalse(SO2CF2CF3)2 polymer electrolytes. The studies were performed as a function of the polymer electrolyte salt concentration and temperature both in rest and in kinetic conditions by means of impedance measurements and galvanostatic tests, respectively. © 2002 The Electrochemical Society. All rights reserved.