Lithium Isotope Effects upon Electrochemical Release from Lithium Manganese Oxide. (May 2015)

• Record Type: Journal Article
• Authors: Okano, Koji; Takami, Yuta; Yanase, Satoshi; Oi, Takao
• Is Part Of: Energy procedia. Volume 71(2015)
• Page Start: 140
• Page End: 148
• Publication Date: 2015-05
• Subjects: lithium isotopes -- isotope effects -- lithium manganese oxide -- separation factor -- lithium ion secondary batteries -- ethylene carbonate; Power resources -- Congresses; Power resources -- Periodicals; Power resources; Conference proceedings; Periodicals; 333.7905
• DOI: 10.1016/j.egypro.2014.11.864
• Languages: English
• ISSNs: 1876-6102

Abstract

Abstract: Lithium was electrochemically released from lithium manganese oxide (LiMn2 O4 ) to an electrolyte solution, a 1:2 v/v mixed solution of ethylene carbonate (EC) and ethylmethyl carbonate (EMC) containing 1 M lithium perchlorate or sodium perchlorate (EC/EMC/LiClO4 or EC/EMC/NaClO4 ) to observe the lithium isotope effects that accompanied the lithium release. The lighter isotope of lithium, 6 Li, was preferentially fractionated to the electrolyte solution phase, with the value of the lithium isotope separation factor ranging from 0.989 to 0.971 at 25 °C. The degree of the lithium isotope fractionation was slightly smaller in the LiMn2 O4 -EC/EMC/NaClO4 system than in the LiMn2 O4 -EC/EMC/LiClO4 system. The present systems are in great contrast with the lithium cobalt oxide (LiCoO2 )-the electrolyte solution systems concerning the direction and magnitude of the lithium isotope effects, which seems mostly ascribable to the structural difference between LiMn2 O4 and LiCoO2。