The invention discloses application of a
cathode material in reduction of oxidation-
reduction potential and an electrochromic device, and belongs to the technical field of electrochromic materials. The general formula of the
cathode material is # imgabs0 #, wherein R1 and R1'are independently selected from an
alkyl group, an
aryl group or an
alkoxy group; r2, R6, R2'and R6 'are independently selected from H, F, Cl, Br, I, CN, NO2,
alkyl, alkoxy or
aryl; x <-> is selected from BF4 <-> or PF6 <->. Compared with a conventional
cathode material, the
cathode material has the advantages that the
electron obtaining capacity is weakened, the
electron losing capacity is enhanced, the
potential difference absolute value of an electrochromic solution prepared from the
cathode material and dimethyl
phenazine is increased, and the
potential energy required by a
positive reaction of the
cathode material in the oxidation-reduction process is increased; correspondingly, the
electric potential energy required by the reverse reaction is reduced, so that the
transmittance of the device in the initial state is improved, and the time required for color
fading is shortened.