Next Article in Journal
Performance of a 250 kW Organic Rankine Cycle System for Off-Design Heat Source Conditions
Next Article in Special Issue
Understanding of Sulfurized Polyacrylonitrile for Superior Performance Lithium/Sulfur Battery
Previous Article in Journal
Silicon Heterojunction Solar Cells Using AlOx and Plasma-Immersion Ion Implantation
Previous Article in Special Issue
A Combined State of Charge Estimation Method for Lithium-Ion Batteries Used in a Wide Ambient Temperature Range
A correction was published on 22 August 2014, see Energies 2014, 7(8), 5500-5501.

Energies 2014, 7(6), 3664-3683; doi:10.3390/en7063664
Article

Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference

1
,
1
,
2
 and
1,*
Received: 24 April 2014 / Revised: 5 June 2014 / Accepted: 9 June 2014 / Published: 13 June 2014
(This article belongs to the Special Issue Electrochemical Energy Storage—Battery and Capacitor)
View Full-Text   |   Download PDF [238 KB, uploaded 17 March 2015]   |   Browse Figures

Abstract

The conversion of heat into current can be obtained by a process with two stages. In the first one, the heat is used for distilling a solution and obtaining two flows with different concentrations. In the second stage, the two flows are sent to an electrochemical cell that produces current by consuming the concentration difference. In this paper, we propose such an electrochemical cell, working with water solutions of zinc chloride. The cell contains two electrodes, made respectively of zinc and silver covered by silver chloride. The operation of the cell is analogous to that of the capacitive mixing and of the “mixing entropy battery”: the electrodes are charged while dipped in the concentrated solution and discharged when dipped in the diluted solution. The cyclic operation allows us to extract a surplus of energy, at the expense of the free energy of the concentration difference. We evaluate the feasibility of such a cell for practical applications and find that a power up to 2 W per m2 of the surface of the electrodes can be achieved.
Keywords: salinity gradient power; power from low-temperature heat sources; renewable energy; zinc–silver battery salinity gradient power; power from low-temperature heat sources; renewable energy; zinc–silver battery
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote
MDPI and ACS Style

Marino, M.; Misuri, L.; Carati, A.; Brogioli, D. Proof-of-Concept of a Zinc-Silver Battery for the Extraction of Energy from a Concentration Difference. Energies 2014, 7, 3664-3683.

View more citation formats

Article Metrics

For more information on the journal, click here

Comments

Cited By

[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert