Lithium Metal Batteries: Reducing Capacity and Voltage Decay of Co‐Free Li 1.2 Ni 0.2 Mn 0.6 O 2 as Positive Electrode Material for Lithium Batteries Employing an Ionic Liquid‐Based Electrolyte (Adv. Energy Mater. 34/2020)

In article number 2001830, Guk-Tae Kim, Stefano Passerini and co-workers highlight the benefits of employing ionic-liquid electrolytes (ILE) in combination with cobalt-free, lithium-rich layered oxide positive electrodes. The ILE dramatically reduces the capacity and voltage fading of Li1.2Ni0.2Mn0.6O2 by suppressing the structural decay of the Li1.2Ni0.2Mn0.6O2 cathode enabling long-term stable cycling of lithium metal batteries.