الفهرس 
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Abstract
reversible transfer of 1.2 Li+
per formula unit, resulting in an outstanding
specific capacity. Besides, they offer other advantages such as reasonable
working voltage (1.2–3 V) and 3-dimensional (3D) Li+
diffusion with a
low diffusion barrier (0.32 eV). Despite that the moderate working
voltage limits the energy density to some extent; it enables the usage of
various alternative electrolytes which cannot be used at high voltages due
to their instabilities [44]. These materials have structure resembles that of
crystalline Li3OCl superionic conductors. In the Antiperovskites structure
type, cations and anions have switched atomic sites as compared to the
classic perovskite CaTiO3. (Li2TM) ChO compounds (TM = Fe, Mn, Co;
Ch = S and Se) are cubic anti-perovskites, described by the space group
𝑃𝑚3 𝑚. Accordingly, the (Li / TM) atoms are located at the octahedral
vertices, S2−or Se2− at the cube vertices, and O at the cube centers. The
cation site in the antiperovskite structure is randomly occupied by lithium,
iron and cobalt or manganese [43, 45, 46]. The solid state reaction method
is the most common method for synthesizing these materials [43, 44, 46-
49]. Recently [50] succeed to synthesis (Li2Fe)SO by mechanochemical
ball milling method.