Nanofibers of metal oxide and production method therefor

Abstract

The invention discloses a production method for nanofibers of metal oxide, wherein the metal oxide is a metal oxide of at least one metal selected from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Zr, Sr, Ba, Mn, Fe, Co, Mg and Ga, comprising: a) spinning a compound precursor containing a salt of the metal, to produce nanofibers of the precursor containing the metal oxide; and b) calcining the nanofibers of the precursor containing the salt of the metal at a temperature in a range of from 500° C. to 800° C., to obtain nanofibers of metal oxide containing the at least one metal element. The invention further discloses nanofibers of metal oxide, a solid electrolyte material, a fuel cell and an oxygen sensor.

1 . A production method for nanofibers of metal oxide, wherein the metal oxide is a metal oxide of at least one metal selected from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Zr, Sr, Ba, Mn, Fe, Co, Mg and Ga, comprising:
 a) spinning a precursor containing a salt of the metal, to produce nanofibers of the precursor containing the salt of the metal; and   b) calcining the nanofibers of the precursor containing the salt of the metal at a temperature ranging from 550° C. to 650° C. for 2 to 4 h, to obtain nanofibers of metal oxide containing the at least one metal element.   
     
     
         2 . The production method according to  claim 1 , wherein the metal oxide is a metal oxide of at least one metal selected from Sc, Y, La, Ce, Pr, Nd, Sm, and Gd. 
     
     
         3 . The production method according to  claim 1 , wherein the precursor contains a macromolecular compound. 
     
     
         4 . The production method according to  claim 1 , wherein the nanofibers of the precursor containing the salt of the metal are prepared by electrospinning or liquid phase spinning method. 
     
     
         5 . Nanofibers of metal oxide, where the metal oxide is a metal oxide containing at least one metal element selected from Sc, Y, La, Ce, Pr, Nd, Sm, Gd, Dy, Ho, Yb, Zr, Sr, Ba, Mn, Fe, Co, Mg and Ga, wherein the average diameter of the nanofibers ranges from 20 to 1000 nm, and the average grain size of the crystals in the nanofibers ranges from 2 to 20 nm. 
     
     
         6 . A solid electrolyte material, which contains the nanofibers of metal oxide according to  claim 5 . 
     
     
         7 . A fuel cell, produced from the solid electrolyte material according to  claim 6 . 
     
     
         8 . An oxygen sensor, produced from the solid electrolyte material according to  claim 6 .