A thermally regenerative ammonia-based battery (TRAB) is a new electrochemical energy device used for the recovery of low-grade waste heat. The use of a three-dimensional (3D)-printed Cu/C composite electrode was proposed to promote electrode stability and to solve the high mass transfer resistance inside the porous electrode. Scanning electron microscopy (SEM) and energy-dispersive X-ray spectroscopy (EDS) tests indicated the successful copper electroplating on the surface of 3D-based porous carbon. The performance of TRAB using Cu/C electrodes (TRAB-Cu/C) was compared with that of TRAB with copper foam electrodes (TRAB-Cu), and the effects of electrode pore size were investigated. Results showed that the maximum power density of TRAB-Cu/C was 42.3 ± 2.4 W m^–2, which was 5.8% higher than that of TRAB-Cu (40 ± 1.6 W m^–2). The pore size of the Cu/C composite electrode significantly influenced the electrode specific surface area and mass transfer inside the porous electrode. The highest maximum power density (42.3 W m^–2) was obtained in a TRAB-Cu/C with a pore size of 0.6 mm.

中文翻译：

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具有3D打印的Cu / C复合电极的蓄热式电池的性能：电极孔径的影响

蓄热式氨电池（TRAB）是一种用于回收低级废热的新型电化学能源设备。提出了使用三维（3D）打印的Cu / C复合电极来提高电极稳定性并解决多孔电极内部的高传质阻力的问题。扫描电子显微镜（SEM）和能量色散X射线光谱（EDS）测试表明，在3D基多孔碳表面成功进行了铜电镀。比较了使用Cu / C电极的TRAB（TRAB-Cu / C）和使用泡沫铜电极的TRAB（TRAB-Cu）的性能，并研究了电极孔径的影响。结果表明，TRAB-Cu / C的最大功率密度为42.3±2.4 W m ^–2，比TRAB-Cu（40±1.6 W m ^–2）高5.8％。Cu / C复合电极的孔径显着影响多孔电极内部的电极比表面积和传质。在孔径为0.6 mm的TRAB-Cu / C中获得了最高的最大功率密度（42.3 W m ^–2）。