Universal method for regulating and controlling Prussian blue and tunnel oxide composite material based on multi-dislocation crystal face and application of Prussian blue and tunnel oxide composite material in sodium-ion battery

The invention discloses a universal method for regulating and controlling a Prussian blue and tunnel oxide composite material based on a multi-dislocation crystal face and an application of the composite material in a sodium ion battery. The composite material comprises a tunnel oxide Na < 0.44 > Mn < alpha > TM < 1-alpha > O2 and the multi-dislocation crystal face Prussian blue Na < x > My [N (CN) 6] z.nH2O. Wherein M/N atoms in NaxMy [N (CN) 6] z.nH2O partially replace Mn/TM atoms in Na < 0.4 > Mn < alpha > TM < 1-alpha > O2, so that the composite material is promoted to form a new symbiotic phase. On one hand, the composite positive electrode material fully utilizes the advantages of the two to realize the performance complementation of the sodium-ion battery; on the other hand, NaxMy [N (CN) 6] z.nH2O is innovatively prepared, local stress and distortion exist in the NaxMy [N (CN) 6] z.nH2O, a symbiotic phase is generated in high-energy ball milling, the first-circle coulombic efficiency of the composite