In Situ Engineering of the Electrode-Electrolyte Interface for Stabilized Overlithiated Cathodes.

Evans, Tyler; Piper, Daniela Molina; Sun, Huaxing; Porcelli, Timothy; Kim, Seul Cham; Han, Sang Sub; Choi, Yong Seok; Tian, Chixia et al. · Adv Mater · 2017

basic_science · Level V

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Abstract

The first-ever demonstration of stabilized Si/lithium-manganese-rich full cells, capable of retaining >90% energy over early cycling and >90% capacity over more than 750 cycles at the 1C rate (100% depth-of-discharge), is made through the utilization of a modified ionic-liquid electrolyte capable of forming a favorable cathode-electrolyte interface.