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The thermal behavior in aluminum-air battery has prominent effect on its operation performance, however, the investigations to the battery thermal behavior are still scarce. In this paper, an alkaline vehicular traction aluminum-air battery was designed and its thermal behavior was experimentally investigated. The impacts of various parameters were examined, including the ambient temperature, electrolyte concentration, and discharge current density on the battery's temperature-rise, outgoing heat-flux, heat generation rate, and discharge efficiency, etc. It is shown that the battery's temperature-rise, outgoing heat-flux, and heat generation rate increase with the ambient temperature decreases and the electrolyte concentration increases. Furthermore, the battery heat generation rate decreases over the discharge time, particularly it decreases drastically at the first half of discharge. The discharge efficiency of the battery increases with the increases of operating temperature and discharge current density. The battery discharge efficiency varies with the electrolyte concentration, which approaches 78 % under the electrolyte concentration of 3.0 mol L−1, but less than 60 % under the concentrations of 1.0 mol L−1 and 6.0 mol L−1. The present study compensates a vacancy of the thermal behavior characterization for a vehicular traction aluminum-air battery, and the results are of significance in understanding the aluminum-air battery's thermal behavior. • An alkaline Al-air battery is devised. • Proposes a measurement method to characterize the Al-air battery thermal behavior. • Impacts of thermal behavior on Al-air battery operating performance is studied. [ABSTRACT FROM AUTHOR]

A novel triptycene-based diamine, 2,6-diaminotriptycene-14-carboxylic acid, was synthesized and used for preparing carboxylic acid containing triptycene-based Tröger's base copolymers, CoPIM-TB-1 and CoPIM-TB-2, with another diamine monomer, 2,6-diaminotriptycene. The copolymers were subsequently post - crosslinked by glycidol to form C-CoPIM-TB-1 and C-CoPIM-TB-2. Glycidol crosslinking greatly impeded inter-chain mobility of the triptycene-based copolymers and subsequently restricted both physical aging rate and CO 2 induced plasticization. Gas permeabilities of 40 days old C-CoPIM-TB-2 film decreased by 7%, 5%, and 9%, to gases H 2 , CO 2 , and O 2 , respectively, which were slower than those of the uncrosslinked PIM-Trip-TB polymer of which permeabilities decreased by 21%, 42%, and 30%, respectively. Mixed gas permeation results showed no CO 2 induced plasticization at a CO 2 partial pressure up to 20 atm. Moreover, separation performance of C-CoPIM-TB-1 and C-CoPIM-TB-2 went over the Robeson 2008 upper bounds for gas pairs including O 2 /N 2 , CO 2 /CH 4 , CO 2 /N 2 and H 2 /N 2 . All these results indicated a great potential for the post-crosslinked Triptycene-Based Tröger's Base polymers for natural gas sweetening. [ABSTRACT FROM AUTHOR]