1. Capacitive Neutralization Dialysis for Direct Energy Generation
- Author
-
Ran Zhao, Wei Ou-Yang, Yue Liu, Yi Zhang, Fei Liu, Bruno Bastos Sales, and Zhuo Sun
- Subjects
Ions ,Chemistry ,Electric potential energy ,Capacitive sensing ,Analytical chemistry ,Ionic bonding ,02 engineering and technology ,General Chemistry ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Ion ,Electricity generation ,Electricity ,Electrode ,Environmental Chemistry ,Current (fluid) ,0210 nano-technology ,Dialysis (biochemistry) ,Electrodes - Abstract
Capacitive neutralization dialysis energy (CNDE) is proposed as a novel energy-harvesting technique that is able to utilize waste acid and alkaline solutions to produce electrical energy. CNDE is a modification based on neutralization dialysis. It was found that a higher NaCl concentration led to a higher open-circuit potential when the concentrations of acid and alkaline solutions were fixed. Upon closing of the circuit, the membrane potential was used as a driving force to move counter ions into the electrical double layers at the electrode–liquid interface, thereby creating an ionic current. Correspondingly, in the external circuit, electrons flow through an external resistor from one electrode to the other, thereby generating electrical energy directly. The influence of external resistances was studied to achieve greater energy extraction, with the maximum output of 110 mW/m2 obtained by employing an external resistance of 5 Ω together with the AC-coated electrode.
- Published
- 2017