Batteries for efficient energy extraction from a water salinity difference |
| |
Authors: | La Mantia Fabio Pasta Mauro Deshazer Heather D Logan Bruce E Cui Yi |
| |
Affiliation: | Department of Materials Science and Engineering, Stanford University, Stanford, California 94305, United States. |
| |
Abstract: | The salinity difference between seawater and river water is a renewable source of enormous entropic energy, but extracting it efficiently as a form of useful energy remains a challenge. Here we demonstrate a device called "mixing entropy battery", which can extract and store it as useful electrochemical energy. The battery, containing a Na(2-x)Mn(5)O(10) nanorod electrode, was shown to extract energy from real seawater and river water and can be applied to a variety of salt waters. We demonstrated energy extraction efficiencies of up to 74%. Considering the flow rate of river water into oceans as the limiting factor, the renewable energy production could potentially reach 2 TW, or ~13% of the current world energy consumption. The mixing entropy battery is simple to fabricate and could contribute significantly to renewable energy in the future. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|