The application relates to the field of
electrochemistry, in particular to a
sodium ion battery electrolyte, a
sodium ion battery containing the
electrolyte and an electronic device. The
electrolyte contains a
sodium salt, an
ether solvent and an additive; the additive comprises a
sulfur-based additive and / or a
nitrogen-based additive; the
sulfur-based additive comprises at least one of 1,3-
propane sultone,
ethylene sulfite and propylene-1,3-
sulfonic acid lactone; the
nitrogen-based additive comprises at least one of
ethyl nitrate,
propyl nitrate,
sodium nitrate,
potassium nitrate and
bismuth nitrate; the
electrolyte of the application is an
ether-based electrolyte obtained through the synergistic cooperation of a
sodium salt, an
ether solvent and a
sulfur-based additive and / or a
nitrogen-based additive, which can be used as a negative
electrode-free
sodium ion battery electrolyte, has high
discharge capacity, excellent cycle performance and rate performance and exhibits good electrochemical performance.