氨气还原氮化法制备有序介孔TiN粉体及其电化学性能  

Synthesis of Ordered Mesoporous TiN Powder via Ammonia Reduction Nitridation Reaction and Its Electrochemical Performance

作　　者：倪洁 魏恒勇 卜景龙 刘会兴 崔燚 吕东风 魏颖娜 张利芳 

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

出　　处：《高等学校化学学报》2017年第3期355-361,共7页Chemical Journal of Chinese Universities

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

摘　　要：以四氯化钛为原料,嵌段共聚物P123(PEO_(20)-PPO_(70)-PEO_(20))为模板剂,氰胺为稳定剂,采用非水解溶胶-凝胶法制备有序介孔TiO_2粉体,再经氨气还原氮化处理得到有序介孔TiN粉体.利用广角/小角X射线衍射、电子显微镜和N_2气吸-脱附等对TiN粉体的结构进行了表征,并通过循环伏安和充放电测试表征了电化学性能.结果显示,该粉体为高纯立方TiN相,呈球形颗粒状,具有有序介孔结构,比表面积高达97 m^2/g.在不同扫描速率下循环伏安曲线均呈类矩形,根据电流密度为50 m A/g时的恒流充放电(GCD)曲线计算比电容为233 F/g,且经2000次充放电循环后比容量仍保持90%以上,在功率密度为0.1 k W/kg时能量密度高达65 W·h·kg^(-1).The ordered mesoporous TiN powder was synthesized by reduction-nitridation method based on the nonhydrolytic sol-gel process using titanium tetrachloride as the raw material, P123 as the structure-directing agent and cyanamide as the stabilizer. The structural information of the composite powder was characterized by wide-angle/small-angle X-ray diffraction, scanning electronic microscopy, N2 adsorption-desorption analysis, and the electrochemical properties were characterized by cyclic vohammetry （CV） and galvanostatic charge- discharge （GCD） measurements. The results show that the synthesized TiN powder was highly pure cubic TiN phase and had ordered mesoporous structure, its specific surface area was 97 m2/g. The CV curves at different scan rates look like the rectangle. The specific capacitance was 233 F/g at current density of 50 mA/g, and remained 90% even after 2000 cycles. When the power density was 0. 1 kW/kg, the energy density was as high as 65 W · h/kg.

关 键 词：氮化钛粉体 有序介孔 非水解溶胶-凝胶法 还原氮化 电化学 

分 类 号：O614.41[理学—无机化学] O646[理学—化学]