Review—Recent Advances and Remaining Challenges for Lithium Ion Battery Cathodes: II. Lithium-Rich, xLi2MnO3⋅(1-x)LiNiaCobMncO2. Issue 1 (1st January 2017)

• Record Type: Journal Article
• Authors: Erickson, Evan M.; Schipper, Florian; Penki, Tirupathi Rao; Shin, Ji-Yong; Erk, Christoph; Chesneau, Frederick-Francois; Markovsky, Boris; Aurbach, Doron
• Is Part Of: Journal of the Electrochemical Society. Volume 164:Issue 1(2017)
• Page Start: A6341
• Page End: A6348
• Publication Date: 2017-01-01
• Subjects: cathode -- composite -- integrated -- Li-rich -- Li2MnO3 -- Mn rich -- solid solution; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0461701jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : Electrodes prepared from lithium-rich (Li-rich) xLi2 MnO3 ⋅(1-x)LiNia Cob Mnc O2 materials (a + b + c = 1) show extremely high discharge capacities, arising from excess Li + present in their Li2 MnO3 component, and the ability to reversibly store charge with O 2− anions. These electrodes suffer serious voltage and capacity fading however, due to the migration of transition metals to the Li-layer at advanced states of charging, partial structural layered-to-spinel transformation and other reasons. In this focus paper, the current understanding of the above materials is summarized, briefly concluding with attempts by our groups to mitigate the voltage and capacity fade of these electrodes.