Effect of Cu2+ concentration in cathode on power generation and copper removal of thermally regenerative ammonia-based battery
(2.Institute of Engineering Thermophysics, Chongqing University, Chongqing, China 400030)
【Abstract】The thermally regenerative ammonia-based battery (TRAB) exhibits unique advantages and good application prospects in the recycling of waste resources. By constructing TRAB to treat Cu2+-containing waste liquid and recovering electric energy and copper resources, the effects of different Cu2+ concentrations on the battery power generation performance and Cu2+ removal of waste liquid were studied. The results showed that, with the increasing Cu2+ concentration less than 0.2 mol/L, the maximal power, the total charge, the energy density, and copper removal rate increased during the discharging. A very-low final concentration and a high removal rate of Cu2+ indicated that TRAB was feasible for the treatment of the waste water containing Cu2+. The two-step treatment method using TRAB combined with the electrocoagulation method in the follow-up study is expected to further improve the treatment effect, and has good economic and application prospects.
【Keywords】 thermally regenerative ammonia-based battery; Cu2+ concentration; maximal power; Cu2+ removal rate; electrochemistry; wastewater; recovery;
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