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Title: An electrochemical system for efficiently harvesting low-grade heat energy

Journal Article · · Nature Communications
DOI:https://doi.org/10.1038/ncomms4942· OSTI ID:1385294
 [1];  [2];  [1];  [2];  [2];  [2];  [3]
  1. Stanford Univ., CA (United States)
  2. Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
  3. Stanford Univ., CA (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)

Capable and low-cost thermal energy-harvesting systems are necessary to utilize the tremendous low-grade heat sources. Although thermoelectric devices are attractive, its efficiency is limited by the relatively low figure-of-merit and low-temperature differential. An alternative method is to explore thermodynamic cycles. Thermogalvanic effect, the dependence of electrode potential on temperature, can construct such cycles. In one cycle, an electrochemical cell is charged at a temperature and then discharged at a different temperature with higher cell voltage, thereby converting heat to electricity. Here we report an electrochemical system using a copper hexacyanoferrate cathode and a Cu/Cu2+ anode to convert heat into electricity. The electrode materials have low polarization, high charge capacity, moderate temperature coefficients and low specific heat. These features lead to a high heat-to-electricity energy conversion efficiency of 5.7% when cycled between 10 and 60 °C, opening a promising way to utilize low-grade heat.

Research Organization:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office; National Research Foundation of Korea (NRF)
Grant/Contract Number:
SC0001299; FG02-09ER46577; EE0005806
OSTI ID:
1385294
Journal Information:
Nature Communications, Vol. 5, Issue 1; Related Information: S3TEC partners with Massachusetts Institute of Technology (lead); Boston College; Oak Ridge National Laboratory; Rensselaer Polytechnic Institute; ISSN 2041-1723
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 326 works
Citation information provided by
Web of Science

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Cited By (36)

Engineering the Electrochemical Temperature Coefficient for Efficient Low-Grade Heat Harvesting journal July 2018
Toward Low-Frequency Mechanical Energy Harvesting Using Energy-Dense Piezoelectrochemical Materials journal October 2015
Formation of Ni-Fe Mixed Diselenide Nanocages as a Superior Oxygen Evolution Electrocatalyst journal September 2017
Hollow Structures Based on Prussian Blue and Its Analogs for Electrochemical Energy Storage and Conversion journal July 2018
Recent Progress on Integrated Energy Conversion and Storage Systems journal May 2017
Reversible Multivalent (Monovalent, Divalent, Trivalent) Ion Insertion in Open Framework Materials journal April 2015
Flexible Ionic Diodes for Low-Frequency Mechanical Energy Harvesting journal November 2016
Thermal-Electric Nanogenerator Based on the Electrokinetic Effect in Porous Carbon Film journal January 2018
Heat recovery in energy production from low temperature heat sources journal December 2018
Prussian Blue Analogues as Promising Thermal Power Generation Materials journal August 2018
Poly(3,4‐Ethylene Dioxythiophene)/Poly(Styrene Sulfonate) Electrodes in Electrochemical Cells for Harvesting Waste Heat journal December 2019
Performance analysis of multistep sorption energy storage using compound adsorbents journal July 2017
Improved Thermal Cyclability of Tertiary Battery Made of Prussian Blue Analogues journal August 2019
Harvesting low-grade heat energy using thermo-osmotic vapour transport through nanoporous membranes journal June 2016
The path towards sustainable energy journal December 2016
New approach to waste-heat energy harvesting: pyroelectric energy conversion journal June 2019
Aqueous thermogalvanic cells with a high Seebeck coefficient for low-grade heat harvest journal December 2018
Direct thermal charging cell for converting low-grade heat to electricity journal September 2019
Cellulose ionic conductors with high differential thermal voltage for low-grade heat harvesting journal March 2019
Thermal efficiency of a thermocell made of Prussian blue analogues journal October 2018
Iron (II/III) perchlorate electrolytes for electrochemically harvesting low-grade thermal energy journal June 2019
Electrochemical Redox Refrigeration journal September 2019
Exponential energy harvesting through repetitive reconfigurations of a system of capacitors journal March 2018
Thermionic Energy Conversion Based on Graphene van der Waals Heterostructures journal April 2017
Control of electro-chemical processes using energy harvesting materials and devices journal January 2017
The effect of 3d-electron configuration entropy on the temperature coefficient of redox potential in Co 1−z Mn z Prussian blue analogues journal January 2019
A bimetallic thermally regenerative ammonia-based battery for high power density and efficiently harvesting low-grade thermal energy journal January 2019
Electrodeposition of nanowires of a high copper content thiourea precursor of copper sulfide journal January 2019
A CoHCF system with enhanced energy conversion efficiency for low-grade heat harvesting journal January 2019
Thermo-osmotic energy conversion and storage by nanochannels journal January 2019
Solar evaporation for simultaneous steam and power generation journal January 2020
Performance optimization of a photovoltaic solar cell-based hybrid system journal July 2018
Analysis and Optimization of Thermally-Regenerative Ammonia-Based Flow Battery Based on a 3-D Model journal January 2019
All-Day Thermogalvanic Cells for Environmental Thermal Energy Harvesting journal October 2019
Poly(3,4‐Ethylene Dioxythiophene)/Poly(Styrene Sulfonate) Electrodes in Electrochemical Cells for Harvesting Waste Heat journal May 2020
Energy harvesting thermocell with use of phase transition journal February 2020

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