**About the Editor**

**Giovanni Battista Appetecchi** is currently a researcher in the Materials and Physicochemical Processes Technical Unit (SSPT-PROMAS-MATPRO) at ENEA (Italian National Agency for New Technologies, Energy and the Sustainable Economic Development). After graduation in Industrial Chemistry at La Sapienza University of Rome on 1993, he was appointed a gran<sup>t</sup> fellowship at La Sapienza University until 2002, and worked as a contract researcher for DAIKIN INDUSTRIES (Japan) and ENEA from 1998 to 2004. In 2004, he was appointed as a researcher at ENEA. In 2013, he spent a one-year sabbatical period in the Department of Chemistry at La Sapienza University in Rome for research activities on materials/components for advanced lithium battery systems. He was the visiting scientist at the Karlsruhe Institute of Technology and the Helmholtz Institute of Ulm (Germany) from 1 September 1 2015 to 2 December 2015; 12 September 2016 to 11 December 2016; and 1 October 2018 to 31 December 2018. For 27 years he has worked on basic and applied research focused on the development of materials and systems for innovative electrochemical energy storage devices, mainly lithium and sodium batteries. His primary research topics are as follows: polymer/gel electrolytes; ionic liquids, composite electrodes. He is the author/co-author of 169 publications in peer reviewed international scientific journals (H-Index = 50, 9,056 citations), 7 book chapters, 163 communications/lectures at scientific meetings, and 3 patents. He is scientifically responsible for ENEA for National and European research projects. In recognition of his work, he was awarded the 1996 "Rotary Club Firenze Est—Herberto Hauda" Award and, in 2012, the Energy and Mobility Award. Dr. Giovani Battista Appetecchi is qualified as a full professor (National Scientific Qualifications accordingly to D.D. 161/2013, January 28, 2013) in the sectors 03/B1 "Principles of Chemistry and Inorganic Systems" and 03/B2 "Chemical Basis of Technology Applications". He is currently Guest Editor of *Membranes* and reviewer of some of the most prestigious international journals in electrochemistry, physical chemistry, science of materials, and power sources.
