Wetting behavior of dialkylimidazolium chloroaluminate, a room-temperature molten salt. Interim report, May-September 1984

Technical Report · Thu Aug 01 00:00:00 EDT 1985

OSTI ID:6308130

Eberhart, J G

The wetting behavior of a battery electrolyte can have a dramatic effect on the internal resistance of the battery as well as its cycle life. Good wetting of battery separators by electrolyte is essential for easy passage of ions through the separator pores during charge and discharge. Porous, gas-diffusion electrodes require, on the other hand, a lesser degree of electrolyte wetting, so that the line of contact of three phases (reactive gas/liquid electrolyte/porous-electrode or current collector) can be maintained within the porous electrode through a balance of capillary and hydrostatic pressures. Advancing and receding contact angles were determined for diakylimidazolium chloroaluminate, room-temperature molten salts on various candidate battery separator and porous electrode materials. The wetting angles were determined for the binary 1-methyl-3-ethylimidazolium chloride/aluminum chloride melt as a function of such variables as composition, chlorination of the imidazolium ion, replacement of AlCl3 by LiCl, solid porosity, and solid surface cleaning procedure. In nearly all cases involving AlCl3 as a second component, the melt easily wets the substrate.

• Research Organization: Air Force Academy, CO (USA). Frank J. Seiler Research Lab.
• OSTI ID: 6308130
• Report Number(s): AD-A-160254/9/XAB
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
ELECTRIC BATTERIES
ELECTROLYTES
ALUMINATES
WETTABILITY
BATTERY SEPARATORS
DIFFUSION
ELECTRODES
MOLTEN SALTS
POROUS MATERIALS
SUBSTRATES
ALUMINIUM COMPOUNDS
ELECTROCHEMICAL CELLS
MATERIALS
OXYGEN COMPOUNDS
SALTS
250903* - Energy Storage- Batteries- Materials
Components
& Auxiliaries