Effect of Cu2+ concentration in cathode on power generation and copper removal of thermally regenerative ammonia-based battery

TANG Zhiqiang1,2 ZHANG Liang1,2 ZHU Xun1,2 LI Jun1,2 FU Qian1,2 LIAO Qiang1,2

(1.Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University), Ministry of Education, Chongqing, China 400030)
(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;

【DOI】

【Funds】 National Natural Science Foundation of China (51606022) Natural Science Foundation of Chongqing, China (cstc2017jcyjAX0203) Scientific Research Foundation for Returned Overseas Chinese Scholars of Chongqing, China (cx2017020) Fundamental Research Funds for the Central Universities of Ministry of Education of China (10611 2016CDJXY 145504) Research Funds of Key Laboratory of Low-grade Energy Utilization Technologies and Systems (Chongqing University) (LLEUTS-2018005)

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This Article

ISSN:0438-1157

CN: 11-1946/TQ

Vol 70, No. 12, Pages 4804-4810

December 2019

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Article Outline

Abstract

  • Introduction
  • 1 Experimental materials and methods
  • 2 Results and discussion
  • 3 Conclusions
  • Symbols
  • References