Solid electrolytes and impact-resistant ceramics. [Progress report]
In this proposal, we describe a program to exploit recent achievements in two distinct areas of materials science, both of them dependent on the independent motion of singly charged ions through an immobile matrix. The first is the area of non-crystalline solid electrolytes in which this laboratory has gained prominence over the past decade. The second is an area proposed for study in our previous proposal and now verified as a principle worthy of considerable further investigation: it involves the use of mobile ions for fast absorption of mechanical energy from short time impacts hence inhibition of crack nucleation and failure in glassy substances. In the first area, we will study both glassy and polymeric systems. For glassy solid electrolytes, we will perform the first electrochemical measurements of cation and anion self-diffusion coefficients in glasses, to provide data to compare with neutron scattering results and thereby to resolve a theoretical dispute. We will look for an important but so-far-unstudied relationship between conductivity/viscosity decoupling in fast ion glasses, and fragility of the liquid above the glass transition temperature. In polymer-salt systems, we will perform both diagnostic and developmental studies. We will try to demonstrate a continuity of behavior, as function of solvent content, between highly decoupled glass and over-coupled salt/polymer solution behavior. This will incorporate a study of polymer-salt liquid immiscibility at high temperatures to seek the relationship between salts and molecular diluent as additives to the polymer solvent. We propose also to study the effects of perfluorination on both polymer fragility and glass transition, and also on carboxylate basicity for possible improvements in overall polymer-salt performance.
- Research Organization:
- Arizona State Univ., Tempe, AZ (United States). Dept. of Chemistry
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- FG02-89ER45398
- OSTI ID:
- 10150946
- Report Number(s):
- DOE/ER/45398-3; ON: DE92015297
- Resource Relation:
- Other Information: PBD: Aug 1991
- Country of Publication:
- United States
- Language:
- English
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