Enabling high energy density Li-ion batteries through Li2O activation. (September 2016)

• Record Type: Journal Article
• Authors: Abouimrane, Ali; Cui, Yanjie; Chen, Zonghai; Belharouak, Ilias; Yahia, Hamdi B.; Wu, Huiming; Assary, Rajeev; Curtiss, Larry A.; Amine, Khalil
• Is Part Of: Nano energy. Volume 27(2016:Sep.)
• Page Start: 196
• Page End: 201
• Publication Date: 2016-09
• Subjects: Li2O activation -- High energy composite cathode material -- First cycle irreversibility; Nanoscience -- Periodicals; Nanotechnology -- Periodicals; Nanostructured materials -- Periodicals; Power resources -- Technological innovations -- Periodicals; Nanoscience; Nanostructured materials; Nanotechnology; Power resources -- Technological innovations; Periodicals; 621.042
• DOI: 10.1016/j.nanoen.2016.06.050
• Languages: English
• ISSNs: 2211-2855

Abstract

Abstract: Lithium oxide (Li2 O) is activated in the presence of a layered composite cathode material (HEM) significantly increasing the energy density of lithium-ion batteries. The degree of activation depends on the current rate, electrolyte salt, and anode type. In full-cell tests, the Li2 O was used as a lithium source to counter the first-cycle irreversibility of high-capacity composite alloy anodes. When Li2 O is mixed with HEM to serve as a cathode, the electrochemical performance was improved in a full cell having an SiO-SnCoC composite as an anode. The mechanism behind the Li2 O activation could also explain the first charge plateau and the abnormal high capacity associated with these high energy cathode materials. Graphical abstract: Activation of Li2 O in lithium ion battery with HEM-Li2 O. Highlights: Lithium oxide (Li2 O) is activated in the presence of a layered composite cathode material (HEM) significantly increasing the energy density of lithium-ion batteries. The degree of activation depends on the current rate, electrolyte salt, and anode type. In full-cell tests, the Li2 O was used as a lithium source to counter the first-cycle irreversibility of high-capacity composite alloy anodes.