1 Department of Physics, Tezpur University, Assam, 784028, India. skdas@tezu.ernet.in.
2 Institute of Physical Chemistry, Justus-Liebig-University Giessen, Heinrich-Buff-Ring 17, 35392 Giessen, Germany. Juergen.Janek@phys.Chemie.uni-giessen.de.
3 Friedrich-Schiller-University Jena, Institute for Technical Chemistry and Environmental Chemistry, Center for Energy and Environmental Chemistry (CEEC Jena), Lessingstraße 12, 07743 Jena, Germany. philipp.adelhelm@uni-jena.de.
We report here the synergistic effect of graphene and diglyme electrolyte in significantly improving the sodium insertion electrochemistry of nanocrystalline anatase TiO2.