Batteries for efficient energy extraction from a water salinity difference

Fabio La Mantia, Mauro Pasta, Heather D. Deshazer, Bruce E. Logan, Yi Cui

Research output: Contribution to journalArticle

202 Citations (Scopus)

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 Na2-xMn 5O10 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.

Original languageEnglish (US)
Pages (from-to)1810-1813
Number of pages4
JournalNano letters
Volume11
Issue number4
DOIs
StatePublished - Apr 13 2011

Fingerprint

salinity
electric batteries
Rivers
Seawater
Water
rivers
Entropy
renewable energy
water
Saline water
Nanorods
energy
entropy
Energy utilization
Flow rate
energy consumption
Electrodes
nanorods
oceans
flow velocity

All Science Journal Classification (ASJC) codes

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

Cite this

La Mantia, Fabio ; Pasta, Mauro ; Deshazer, Heather D. ; Logan, Bruce E. ; Cui, Yi. / Batteries for efficient energy extraction from a water salinity difference. In: Nano letters. 2011 ; Vol. 11, No. 4. pp. 1810-1813.
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La Mantia, F, Pasta, M, Deshazer, HD, Logan, BE & Cui, Y 2011, 'Batteries for efficient energy extraction from a water salinity difference', Nano letters, vol. 11, no. 4, pp. 1810-1813. https://doi.org/10.1021/nl200500s

Batteries for efficient energy extraction from a water salinity difference. / La Mantia, Fabio; Pasta, Mauro; Deshazer, Heather D.; Logan, Bruce E.; Cui, Yi.

In: Nano letters, Vol. 11, No. 4, 13.04.2011, p. 1810-1813.

Research output: Contribution to journalArticle

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