File Download

There are no files associated with this item.

  Links for fulltext
     (May Require Subscription)
Supplementary

Article: Effect of electrolyte on electrochemical characteristics of MmNi3.55Co0.72Al0.3Mn0.43 alloy electrode for hydrogen storage

TitleEffect of electrolyte on electrochemical characteristics of MmNi3.55Co0.72Al0.3Mn0.43 alloy electrode for hydrogen storage
Authors
KeywordsHigh-rate discharge
Self-discharge
MmNi3.55Co0.72Al0.3Mn0.43
Electrolyte
Issue Date2009
Citation
International Journal of Hydrogen Energy, 2009, v. 34, n. 13, p. 5422-5428 How to Cite?
AbstractA series of experiments have been performed to investigate the effects of three electrolytes of different compositions (EO, EA and EM) on the electrochemical characteristics of MmNi3.55Co0.72Al0.3Mn0.43 hydrogen storage alloy electrode. Electrolytes EA and EM were obtained by adding appropriate amounts of Al2(SO4)3 and MnSO4 to the original electrolyte EO (6 M KOH + 1 wt% LiOH), respectively. Electrode activation, maximum capacity, cycle life, self-discharge and high-rate discharge characteristics have been studied. It was found that a maximum capacity of about 260 mA h/g has been obtained for the alloy electrodes in all these electrolytes after 5-7 cycles of charging/discharging. The alloy electrodes have a good durability in electrolytes EA and EM, especially after 175 cycles. Using the capacity retention as an indication of self-discharge resistance, almost identical degree of capacity retention (82% after 4 days and 45% after 16 days) has been observed at 298 K, regardless of the electrolytes used. When tested at higher temperature, however, a higher capacity retention (46% after 3 days) at 333 K has been observed for electrodes in electrolyte EA, and about 32% for electrodes in both electrolytes EO and EM. As to high-rate discharge behavior of the results of high-rate discharge tests indicated that about 50% of discharge efficiencies were obtained in the three electrolytes at 333 K by continuous-model high-rate discharge method, at a discharge rate of 7C, and 22% in 298 K. The alloy electrode in electrolyte EM has the best durability, in which about 50% of discharge efficiency at DC = 9C was obtained by step-model high-rate discharge method at 333 K, which was even higher than that at 298 K. © 2008.
Persistent Identifierhttp://hdl.handle.net/10722/222630
ISSN
2015 Impact Factor: 3.205
2015 SCImago Journal Rankings: 1.330

 

DC FieldValueLanguage
dc.contributor.authorWang, Zhong Min-
dc.contributor.authorLi, Chi Ying Vanessa-
dc.contributor.authorChan, Sammy Lap Ip-
dc.date.accessioned2016-01-19T03:36:40Z-
dc.date.available2016-01-19T03:36:40Z-
dc.date.issued2009-
dc.identifier.citationInternational Journal of Hydrogen Energy, 2009, v. 34, n. 13, p. 5422-5428-
dc.identifier.issn0360-3199-
dc.identifier.urihttp://hdl.handle.net/10722/222630-
dc.description.abstractA series of experiments have been performed to investigate the effects of three electrolytes of different compositions (EO, EA and EM) on the electrochemical characteristics of MmNi3.55Co0.72Al0.3Mn0.43 hydrogen storage alloy electrode. Electrolytes EA and EM were obtained by adding appropriate amounts of Al2(SO4)3 and MnSO4 to the original electrolyte EO (6 M KOH + 1 wt% LiOH), respectively. Electrode activation, maximum capacity, cycle life, self-discharge and high-rate discharge characteristics have been studied. It was found that a maximum capacity of about 260 mA h/g has been obtained for the alloy electrodes in all these electrolytes after 5-7 cycles of charging/discharging. The alloy electrodes have a good durability in electrolytes EA and EM, especially after 175 cycles. Using the capacity retention as an indication of self-discharge resistance, almost identical degree of capacity retention (82% after 4 days and 45% after 16 days) has been observed at 298 K, regardless of the electrolytes used. When tested at higher temperature, however, a higher capacity retention (46% after 3 days) at 333 K has been observed for electrodes in electrolyte EA, and about 32% for electrodes in both electrolytes EO and EM. As to high-rate discharge behavior of the results of high-rate discharge tests indicated that about 50% of discharge efficiencies were obtained in the three electrolytes at 333 K by continuous-model high-rate discharge method, at a discharge rate of 7C, and 22% in 298 K. The alloy electrode in electrolyte EM has the best durability, in which about 50% of discharge efficiency at DC = 9C was obtained by step-model high-rate discharge method at 333 K, which was even higher than that at 298 K. © 2008.-
dc.languageeng-
dc.relation.ispartofInternational Journal of Hydrogen Energy-
dc.subjectHigh-rate discharge-
dc.subjectSelf-discharge-
dc.subjectMmNi3.55Co0.72Al0.3Mn0.43-
dc.subjectElectrolyte-
dc.titleEffect of electrolyte on electrochemical characteristics of MmNi3.55Co0.72Al0.3Mn0.43 alloy electrode for hydrogen storage-
dc.typeArticle-
dc.description.natureLink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ijhydene.2008.12.002-
dc.identifier.scopuseid_2-s2.0-67649584045-
dc.identifier.volume34-
dc.identifier.issue13-
dc.identifier.spage5422-
dc.identifier.epage5428-

Export via OAI-PMH Interface in XML Formats


OR


Export to Other Non-XML Formats