|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Materials for Energy Conversion and Storage
||High Energy Density Lithium Ion Battery Based on Li2O Activation
||Ali Abouimrane, Yanjie Cui, Zonghai Chen, Ilias Belharouak, Hamdi B. Yahia, Huiming Wu, Rajeev Assary, Larry A. Curtiss, Khalil Amine
|On-Site Speaker (Planned)
Li2O has been successfully activated in Li-ion battery (LIB). This activation was conducted when Li2O was mixed with layer composite cathode materials such as Li2MnO3-LiMO2 (M=Mn, Ni, Co). The degree of activation depends significantly on the current rate, electrolyte salt, and anode type. The mechanism of Li2O activation will be presented and discussed. We provide a full evaluation of the possible causes of this activation. A key finding is the possible formation of a redox shuttle species during this activation. In full-cell tests, the Li2O was used as a lithium source to counter the first-cycle irreversibility of high capacity anodes. Indeed, when Li2O was mixed with a layer composite cathode material to serve as a cathode, the electrochemical performance was improved in a full cell having SiO-SnCoC composite material as an anode. Our hypothesis regarding Li2O activation can also explain the first charge plateau observed for the layer composite cathode material. These findings have implication for improving the energy density of both next generation LIB and lithium-air batteries.
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