Handle URI:
http://hdl.handle.net/10754/599460
Title:
Recent results on aqueous electrolyte cells
Authors:
Wessells, Colin; Huggins, Robert A.; Cui, Yi
Abstract:
The improved safety of aqueous electrolytes makes aqueous lithium-ion batteries an attractive alternative to commercial cells utilizing flammable and expensive organic electrolytes. Two important issues relating to their use have been addressed in this work. One is the extension of the usable voltage range by the incorporation of lithium salts, and the other is the investigation of a useful negative electrode reactant, LiTi 2(PO 4) 3. The electrochemical stability of aqueous lithium salt solutions containing two lithium salts, LiNO 3 and Li 2SO 4, has been characterized using a constant current technique. In both cases, concentrated solutions had effective electrolyte stability windows substantially greater than that of pure water under standard conditions. At an electrolyte leakage current of 10 μA cm -2 between two platinum electrodes in 5 M LiNO 3 the cell voltage can reach 2.0 V, whereas with a leakage current of 50 μA cm -2 it can reach 2.3 V. LiTi 2(PO 4) 3 was synthesized using a Pechini method and cycled in pH-neutral Li 2SO 4. At a reaction potential near the lower limit of electrolyte stability, an initial discharge capacity of 118 mAh g -1 was measured at a C/5 rate, while about 90% of this discharge capacity was retained after 100 cycles. This work demonstrates that it is possible to have useful aqueous electrolyte lithium-ion batteries using the LiTi 2(PO 4) 3 anode with cell voltages of 2 V and above. © 2010 Elsevier B.V. All rights reserved.
Citation:
Wessells C, Huggins RA, Cui Y (2011) Recent results on aqueous electrolyte cells. Journal of Power Sources 196: 2884–2888. Available: http://dx.doi.org/10.1016/j.jpowsour.2010.10.098.
Publisher:
Elsevier BV
Journal:
Journal of Power Sources
Issue Date:
Mar-2011
DOI:
10.1016/j.jpowsour.2010.10.098
Type:
Article
ISSN:
0378-7753
Sponsors:
This work was performed with support from the King Abdullah University of Science and Technology (KAUST) and the Global Climate and Energy Project (GCEP) at Stanford University.
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorWessells, Colinen
dc.contributor.authorHuggins, Robert A.en
dc.contributor.authorCui, Yien
dc.date.accessioned2016-02-28T05:51:33Zen
dc.date.available2016-02-28T05:51:33Zen
dc.date.issued2011-03en
dc.identifier.citationWessells C, Huggins RA, Cui Y (2011) Recent results on aqueous electrolyte cells. Journal of Power Sources 196: 2884–2888. Available: http://dx.doi.org/10.1016/j.jpowsour.2010.10.098.en
dc.identifier.issn0378-7753en
dc.identifier.doi10.1016/j.jpowsour.2010.10.098en
dc.identifier.urihttp://hdl.handle.net/10754/599460en
dc.description.abstractThe improved safety of aqueous electrolytes makes aqueous lithium-ion batteries an attractive alternative to commercial cells utilizing flammable and expensive organic electrolytes. Two important issues relating to their use have been addressed in this work. One is the extension of the usable voltage range by the incorporation of lithium salts, and the other is the investigation of a useful negative electrode reactant, LiTi 2(PO 4) 3. The electrochemical stability of aqueous lithium salt solutions containing two lithium salts, LiNO 3 and Li 2SO 4, has been characterized using a constant current technique. In both cases, concentrated solutions had effective electrolyte stability windows substantially greater than that of pure water under standard conditions. At an electrolyte leakage current of 10 μA cm -2 between two platinum electrodes in 5 M LiNO 3 the cell voltage can reach 2.0 V, whereas with a leakage current of 50 μA cm -2 it can reach 2.3 V. LiTi 2(PO 4) 3 was synthesized using a Pechini method and cycled in pH-neutral Li 2SO 4. At a reaction potential near the lower limit of electrolyte stability, an initial discharge capacity of 118 mAh g -1 was measured at a C/5 rate, while about 90% of this discharge capacity was retained after 100 cycles. This work demonstrates that it is possible to have useful aqueous electrolyte lithium-ion batteries using the LiTi 2(PO 4) 3 anode with cell voltages of 2 V and above. © 2010 Elsevier B.V. All rights reserved.en
dc.description.sponsorshipThis work was performed with support from the King Abdullah University of Science and Technology (KAUST) and the Global Climate and Energy Project (GCEP) at Stanford University.en
dc.publisherElsevier BVen
dc.subjectAqueous cells over 2 Ven
dc.subjectAqueous electrolytesen
dc.subjectLithium-ion batteriesen
dc.subjectStability of aqueous electrolytesen
dc.titleRecent results on aqueous electrolyte cellsen
dc.typeArticleen
dc.identifier.journalJournal of Power Sourcesen
dc.contributor.institutionStanford University, Palo Alto, United Statesen
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