还原氮化法制备多孔氮化钛粉体及其电化学性能  

Preparation of Porous Titanium Nitride Powders by Reduction Nitridation and Its Electrochemical Performance

作　　者：刘盼 魏恒勇 卜景龙 倪洁 吕东风 崔燚 

机构地区：[1]华北理工大学材料科学与工程学院,唐山063000 [2]河北省无机非金属材料重点实验室,唐山063009

出　　处：《材料导报》2017年第21期146-150,共5页Materials Reports

基　　金：国家自然科学基金(51272066);河北省自然科学基金(E2013209183);华北理工大学青年科学研究基金(Z201413)

摘　　要：以乙醇为氧供体,四氯化钛为钛源,采用非水解溶胶-凝胶法制备多孔TiO2粉体,再经900℃氨气还原氮化合成多孔TiN粉体。利用XRD、SEM和BET表征粉体的物相、形貌及孔结构。结果表明,还原氮化产物为NaCl型立方TiN,颗粒呈球形团聚体,晶粒尺寸均匀,直径约30nm,同时具有平均孔径为22nm的介孔结构,孔容为0.18cm3/g,比表面积为34m2/g。循环伏安测试表明TiN粉体具有良好的功率特性,交流阻抗图谱显示其电阻较小,约为1.44Ω。恒流充放电测试表明TiN粉体的比电容达到81F/g,且能量密度随着功率密度增加而缓慢减小。由此可知,该多孔TiN粉体在超级电容器领域有应用潜力。The porous TiO2 powder was prepared by non-hydrolytic sol-gel method using ethanol as the oxygen donor and titanium tetrachloride as the titanium source.The porous TiN powder was synthesized via nitrogen reduction of the porous TiO2 powder at 900 ℃.The XRD,SEM and BET results indicate that the product nitrogen reduction was TiN with NaCl-type cubic phase,and the particles were spherical aggregates.It was found that the grain size of powder was uniform and the diameter was about 30 nm.The product has a mesoporous structure that the average pore size was 22 nm and the pore volume was 0.18 cm3/g.The specific surface area of TiN powder was 34 m2/g.Cyclic voltammetry tests showed that the TiN powder had good power characteristics.And it showed small resistance of about 1.44Ωby EIS.The specific capacitance of TiN powder also reached 81 F/g,and the energy density of it decreased slowly with the increase of power density.It has been found that porous TiN powders have good electrochemical properties and it has potential applications in the field of supercapacitors.

关 键 词：氮化钛粉体 多孔 还原氮化 电化学 

分 类 号：TB34[一般工业技术—材料科学与工程] O614.411[理学—无机化学]