Layered Na2Ti3O7 has shown promising electrochemical performance to be used as anode material in room temperature sodium ion batteries. We have synthesized several phases in the solid solutions Na2-x(H,Li)xTi3O7 including both end members, all of them being electrochemically active. We would like to study the phases Na2-x(H,Li)xTi3O7 with neutron diffraction as well as and their chemically sodiated counterparts, in order to precisely determine Na, Li and H positions and correlate the structural differences with their different electrochemical behavior. The described protonated samples will be studied at low temperature to locate sodium ions, already pre-located with X-ray diffraction. Data will also be collected in deuterated samples equivalent to the proton containing systems in order to reduce incoherent scattering and so as to look at the proton/deuterium positions