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Title: A polyoxometalate flow battery

A redox flow battery utilizing two, three-electron polyoxometalate redox couples (SiVV3WVI9O407–/SiVIV3WVI9O4010- and SiVIV3WVI9O4010-/SiVIV3WV3WVI6O4013-) was investigated for use in stationary storage in either aqueous or non-aqueous conditions. The aqueous battery had coulombic efficiencies greater than 95% with relatively low capacity fading over 100 cycles. Infrared studies showed there was no decomposition of the compound under these conditions. The non-aqueous analog had a higher operating voltage but at the expense of coulombic efficiency. The spontaneous formation of these clusters by self-assembly facilitates recovery of the battery after being subjected to reversed polarity. Polyoxometalates offer a new approach to stationary storage materials because they are capable of undergoing multi-electron reactions and are stable over a wide range of pH values and temperatures.
Authors:
; ; ;
Publication Date:
OSTI Identifier:
1062868
Report Number(s):
SAND2013-1139J
Journal ID: ISSN 0378-7753
DOE Contract Number:
AC04-94AL85000
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Power Sources; Journal Volume: 236; Journal Issue: C
Publisher:
Elsevier
Research Org:
Sandia National Laboratories
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE