Accession Number : ADA258331


Title :   Poly(Ethylene Oxide)-Based Zn(II) Halide Electrolytes


Descriptive Note : Technical rept. 31 May 1991-30 Jun 1992


Corporate Author : PENNSYLVANIA UNIV PHILADELPHIA DEPT OF CHEMISTRY


Personal Author(s) : Yang, H ; Farrington, G C


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a258331.pdf


Report Date : 12 Jun 1992


Pagination or Media Count : 42


Abstract : Poly(ethylene oxide) (PEO)-based Zn(II) halide electrolytes with optimized compositions exhibit rather high conductivities compared to other PEO solutions of divalent cation salts. Chemical diffusion studies have clearly demonstrated that both Zn(II) and Br(-I) are mobile. It appears that Zn(H) cations occur in two forms, one associated with the ether oxygens and another associated with the anions. It is reasonable that the former should be less mobile than the latter. Regrettably, quantitative measurement of the transference number and diffusion coefficients of the charge carriers using elecrochemical techniques proved difficult Other measurements found that the value of Tg for the completely amorphous forms of the electrolytes increases linearly with the mole ration of (Zn) (O), indicating that Zn(II) cations interact with ether oxygens in the PEO chains to form inter- and/or intrachain cross-links. Poly(Ethylene oxide), Zn(II) Halide electrolytes, Divalent cation salts, Cations, Anions, Mole ration, Transference number, Diffusion coefficients, Charge carriers, Interchain and intrachain cross-links.


Descriptors :   *POLYMERS , *ETHYLENE , *HALIDES , *ELECTROLYTES , *ZINC , IONS , CATIONS , MEASUREMENT , ELECTROCHEMISTRY , THERMAL STABILITY , OXIDES , CHAINS , BROMIDES , RATIONS , NUMBERS , SALTS , VALUE , DIFFUSION , VALENCE , ETHERS , MOBILE , ETHYLENE OXIDE , ANIONS , COEFFICIENTS , CROSSLINKING(CHEMISTRY) , OXYGEN , CHARGE CARRIERS , CONDUCTIVITY , CHEMICALS , PHASE TRANSFORMATIONS


Subject Categories : Physical Chemistry
      Polymer Chemistry
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE