Vanadium flow battery electrolyte synthesis via chemical reduction of V₂O₅ in aqueous HCl and H₂SO₄

Journal Article · Wed Jun 01 00:00:00 EDT 2016 · Proposed Journal Article, unpublished

OSTI ID:1326364

Small, Leo J. ^[1]; Soundappan, Thiagarajan ^[2]; Pratt, III, Harry D. ^[1]; Anderson, Travis Mark ^[1]; Chalamala, Babu R. ^[1]; Subramanian, Venkat ^[3]; Tiwari, Monika ^[4]

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1. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
2. Washington Univ., St. Louis, MO (United States)
3. Washington Univ., St. Louis, MO (United States); Univ. of Washington, Seattle, WA (United States)
4. Indian Institute of Technology Bombay, Mumbai (India)

Here, we report a simple method to synthesize V⁴⁺(VO²⁺) electrolytes as feedstock for all vanadium redox flow batteries (RFB). By dissolving V₂O₅ in aqueous HCl and subsequently adding glycerol as a reducing agent, we have demonstrated an inexpensive route for electrolyte synthesis to concentrations >2.5 M V⁴⁺ (VO²⁺). Electrochemical analysis and testing of laboratory scale RFB demonstrate improved thermal stability across a wider temperature range (-10-65°C) for V⁴⁺(VO²⁺) electrolytes in HCl compared to in H₂SO₄ electrolytes.

• Research Organization: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
• Sponsoring Organization: USDOE Office of Electricity (OE)
• DOE Contract Number: AC04-94AL85000
• OSTI ID: 1326364
• Report Number(s): SAND-2016-5805J; 642211
• Journal Information: Proposed Journal Article, unpublished, Journal Name: Proposed Journal Article, unpublished; ISSN 9999-9999
• Publisher: See Research Organization
• Country of Publication: United States
• Language: English

Related Subjects

25 ENERGY STORAGE
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY