Poly(ethylene oxide)-based electrolytes for lithium-ion batteries

Abstract

This article reviews the PEO-based electrolytes for lithium-ion batteries.Poly(ethylene oxide) (PEO) based materials are widely considered as promising candidates of polymer hosts in solid-state electrolytes for high energy density secondary lithium batteries. They have several specific advantages such as high safety, easy fabrication, low cost, high energy density, good electrochemical stability, and excellent compatibility with lithium salt. However, the typical linear PEO does not reach the production requirement because its insufficient ionic conductivity due to the high crystallinity of the ethylene oxide (EO) chains, which can restrain the ionic transition due to the stiff structure especially at low temperature. The scientists have explored different approaches to reduce the crystallinity hence to improve the ionic conductivity of PEO-based electrolytes, including: blending, modifying and making PEO derivatives etc. This review is focused on surveying the recent developments and issues about PEO-based electrolytes for lithium-ion batteries.

Perspectives for solid biopolymer electrolytes in dye sensitized solar cell and battery application

“…The cathode materials used in batteries are vanadium oxide, molybdenum sulfide, molybdenum oxide, manganese oxide, silicates, LiCoO 2 , LiFePO 4 , LiMn 2 O 4 etc. [1][2][3][4][5]. The different types of electrolyte materials based on biopolymer are studied briefly in this review.…”

“…It is also identified that Li-ion batteries (LIBs) are the preferred system for electric vehicles, grid energies and flexible electronic devices due to their high energy and power density [4]. Particularly, flexible and wearable electronics are expected to increase an exceptional importance in the future as energy storage devices.…”

“…The most commonly studied polymer electrolytes are the complexes of metal salts with high molecular weight polymer polyethylene oxide (PEO) [1][2][3]. However, one of the major drawbacks of PEObased solid polymer electrolytes is their low ionic conductivity (10 À 7 S/cm) at ambient temperature, which limits their practical applications [4,5]. To date, a large number of other synthetic polymers, such as polymethyl methacrylate (PMMA), poly acrylonitrile (PAN), poly(vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP), polyvinyl alcohol (PVA), and polyvinylpyrrolidone (PVP) etc, have been studied in electrolyte applications [6][7][8][9].…”

“…Polymer electrolytes are one of the most important materials used in fabricating many electrochemical devices [1][2][3][4][5]. Polymers are classified into two main categories (1) synthetic and (2) natural.…”

“…As a result, safety issues are the major concerns in the applications of batteries. In such a situation, the development of solid-state electrolytes is a major challenge to be faced by scientific research [1][2][3][4][5].…”