Síntesis y caracterización estructural del compuesto de intercalación Li2+xTi3O7 (x=2.25)

A solid solution Li 2+x Ti 3 O 7 (2.0≤x≤2.25) can be obtained by electrochemical lithium insertion in Ramsdellite-Li 2 Ti 3 O7. The upper limit Li 2+x Ti 3 O 7 (x=2.25) has been studied by means of X-ray diffraction and selected area electron diffraction techniques. Although certain disorder along the [010] direction appears, the initial Ramsdellite framework of Li 2 Ti 3 O 7 is maintained in Li 4.25 Ti 3 O 7 . The absence of relevant structural changes explain the high reversibility of the lithium intercalation reaction in Ramsdellite-Li 2 Ti 3 O 7 .