The invention relates to
gadolinium oxysulfide
powder based on a
molten salt method and a preparation method of the
gadolinium oxysulfide
powder. The preparation method specifically comprises the following steps: preparing a precursor solution, and cleaning and
drying an obtained
precipitation product to obtain precursor
powder; the precursor powder is one of Gd2O2CO3, Gd2 (SO4) 3.8 H2O, Gd2 (OH) 4SO4. XH2O and Gd2 (OH) 5NO3. XH2O, and the precursor powder is one of Gd2O2CO3, Gd2 (SO4) 3.8 H2O, Gd2 (OH) 4SO4. XH2O and Gd2 (OH) 5NO3. XH2O; uniformly mixing the prepared precursor powder, a
sulfur source and fused salt, putting the mixture into a
crucible,
sintering at high temperature in a protective
atmosphere to enable the mixed powder to form a
molten state, and cleaning and
drying after
sintering and cooling to obtain
gadolinium oxysulfide powder; and the
molten salt is one of Li2CO3 and Na2CO3, Li2CO3 and K2CO3, Li2CO3 and K2CO3, and Na2CO3. The invention also discloses a preparation method of the
lithium ion battery. Compared with the prior art, the method has the advantages that the Gd2O2S powder is synthesized in the air or the
reducing atmosphere or the
inert atmosphere, compared with a traditional high-temperature
solid-
phase synthesis method, the synthesis temperature is greatly reduced, and the generated Gd2O2S is good in
crystallinity, high in purity, free of
impurity phases and high in
dispersity.