Valve metal porous body coating electrode foil, manufacturing method and electrolytic capacitor

The invention provides a valve metal porous body coating electrode foil, which comprises an aluminum foil substrate and a valve metal porous body coating bonded on at least one surface of the aluminumfoil substrate in a metallurgical way. The valve metal porous body coating is formed by stacking and sintering valve metal powder into a whole. At least one valve metal compound is contained betweenvalve metal powder particles and between the valve metal powder particles and the aluminum foil substrate, and conductive connection is formed. The valve metal powder contains titanium powder, and thevolume of the titanium powder accounts for 2-100% of the volume of the valve metal powder. The valve metal porous body coating is formed by amorphous accumulation of the valve metal powder and in-situ generation of the valve metal compound among particles to promote metallurgical bonding, and extremely high specific volume can be obtained. The invention further discloses a manufacturing method ofthe electrode foil and an e