Influence of silica aerogel on the properties of polyethylene oxide-based nanocomposite polymer electrolytes for lithium battery

Abstract In this study, a series of nanocomposite polymer electrolytes (NCPEs) with high conductivity and lithium ion transference number, PEO/LiClO 4 /SAP, were prepared from high molecular weight polyethylene oxide (PEO), LiClO 4 and low content of homemade silica aerogel powder (SAP), which had higher surface area and pore volume than the conventional silica particle. From the SEM images it was found that the SAP nanoparticles were well dispersed in the PEO polymer electrolyte matrix. The characterization and interactions in the CPEs were studied by DSC, XRD, FT-IR and 7 Li NMR analysis. The ac impedance results showed that the ionic conductivity of the CPE was significantly improved by the addition of the as-prepared SAP. The maximum ambient ionic conductivity obtained from the CPE with EO/Li = 6 and 2 wt.% of SAP (O6A2) was about threefold higher than that of the corresponding polymer electrolyte without SAP (O6). In addition, the lithium ion transference number ( t + ) of O6A2 at 70 °C was as high as 0.67, which was also three times higher than that of O6 and has not been previously reported for the PEO–LiX-based polymer electrolytes.

[1]  M. Ayers,et al.  Synthesis and properties of chitosan–silica hybrid aerogels , 2001 .

[2]  Diana Golodnitsky,et al.  The sei model—application to lithium-polymer electrolyte batteries , 1995 .

[3]  B. Scrosati,et al.  Enhancement of ion transport in polymer electrolytes by addition of nanoscale inorganic oxides , 2001 .

[4]  Jingyu Xi,et al.  Composite polymer electrolyte doped with mesoporous silica SBA-15 for lithium polymer battery , 2005 .

[5]  Michael J. Zaworotko,et al.  Air and water stable 1-ethyl-3-methylimidazolium based ionic liquids , 1992 .

[6]  Jingyu Xi,et al.  Enhanced electrochemical properties of PEO-based composite polymer electrolyte with shape-selective molecular sieves , 2006 .

[7]  T E Browder,et al.  Observation of the D(sJ)(2317) and D(sJ)(2457) in B decays. , 2003, Physical review letters.

[8]  Jong-Wan Park,et al.  Electrochemical characteristics of two types of PEO-based composite electrolyte with functional SiO2 , 2003 .

[9]  P. V. Wright,et al.  Complexes of alkali metal ions with poly(ethylene oxide) , 1973 .

[10]  Markus Antonietti,et al.  Room-temperature ionic liquids as template to monolithic mesoporous silica with wormlike pores via a sol-gel nanocasting technique , 2004 .

[11]  Yuanhua Lin,et al.  Enhanced ionic conductivity of polymer electrolytes containing nanocomposite SiO2 particles. , 2003, Physical review letters.

[12]  Felix B. Dias,et al.  Trends in polymer electrolytes for secondary lithium batteries , 2000 .

[13]  K. Gubbins,et al.  Nitrogen adsorption in carbon aerogels: A molecular simulation study , 2002 .

[14]  M. Marcinek,et al.  Effect of Filler Surface Group on Ionic Interactions in PEG−LiClO4−Al2O3 Composite Polyether Electrolytes , 2000 .

[15]  M. J. Reddy,et al.  7Li NMR spectroscopy and ion conduction mechanism in mesoporous silica (SBA-15) composite poly(ethylene oxide) electrolyte , 2004 .

[16]  B. Scrosati,et al.  Nanocomposite polymer electrolytes for lithium batteries , 1998, Nature.

[17]  M. Dissanayake,et al.  Effect of nano-porous Al2O3 on thermal, dielectric and transport properties of the (PEO)9LiTFSI polymer electrolyte system , 2002 .

[18]  Y. Chen-Yang,et al.  Polyphosphazene Electrolytes. 1. Preparation and Conductivities of New Polymer Electrolytes Based on Poly[bis(amino)phosphazene] and Lithium Perchlorate , 1997 .

[19]  Jingyu Xi,et al.  Enhanced electrochemical properties of poly(ethylene oxide)-based composite polymer electrolyte with ordered mesoporous materials for lithium polymer battery , 2006 .

[20]  W. Wieczorek,et al.  Ionic Interactions in Polymeric Electrolytes Based on Low Molecular Weight Poly(ethylene glycol)s , 1998 .

[21]  Bruno Scrosati,et al.  Physical and chemical properties of nanocomposite polymer electrolytes , 1999 .

[22]  B. Scrosati,et al.  A novel composite polymer electrolyte: Effect of mesoporous SiO2 on ionic conduction in poly(ethylene oxide)–LiCF3SO3 complex , 2005 .

[23]  Bradley F. Chmelka,et al.  Nonionic Triblock and Star Diblock Copolymer and Oligomeric Surfactant Syntheses of Highly Ordered, Hydrothermally Stable, Mesoporous Silica Structures , 1998 .

[24]  H. Kao,et al.  Multinuclear solid-state NMR, self-diffusion coefficients, differential scanning calorimetry, and ionic conductivity of solid organic-inorganic hybrid electrolytes based on PPG-PEG-PPG diamine, siloxane, and lithium perchlorate , 2006 .

[25]  M. Dissanayake,et al.  Effect of concentration and grain size of alumina filler on the ionic conductivity enhancement of the (PEO)9LiCF3SO3:Al2O3 composite polymer electrolyte , 2003 .

[26]  M. Salomon,et al.  Molecular Structure and Dynamics of LiClO4-Polyethylene Oxide-400 (Dimethyl Ether and Diglycol Systems) at 25 .degree.C , 1994 .

[27]  O. Kwon,et al.  Interlamellar silylation of H-kenyaite with 3-aminopropyltriethoxysilane , 2004 .

[28]  P. Bruce,et al.  Steady state current flow in solid binary electrolyte cells , 1987 .

[29]  P. Bruce,et al.  Electrochemical measurement of transference numbers in polymer electrolytes , 1987 .

[30]  H. Kao,et al.  An organic-inorganic hybrid electrolyte derived from self-assembly of a poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer. , 2004, Angewandte Chemie.

[31]  S. Pennycook,et al.  Preparation of silica aerogel using ionic liquids as solvents , 2000 .

[32]  H. Kao,et al.  Functionalized mesoporous silica MCM-41 in poly(ethylene oxide)-based polymer electrolytes: NMR and conductivity studies , 2005 .

[33]  L. Hong,et al.  Morphology, crystallinity, and electrochemical properties of in situ formed poly(ethylene oxide)/TiO2 nanocomposite polymer electrolytes , 2003 .