摘要
以四氯化钛为钛源,P123为模板剂,氰胺为稳定剂,采用溶胶-凝胶法制备多孔TiO 2粉体,再经900℃氨气还原氮化得到多孔TiN粉体。通过XRD,SEM,BET,TEM和SAXD等表征粉体物相组成与微观结构,并采用循环伏安法、交流阻抗法和恒流充放电法测试其电化学性能。结果表明:合成粉体颗粒近似球形,为立方TiN相。相比之下,引入P123时所合成粉体中孔径尺寸为10~50nm的介孔数量增加,并存在孔径大小为2~3nm的微小孔道,同时孔道结构有序性有所提高,这有助于提升TiN粉体的电化学性能。因此,未加入P123合成TiN粉体的比电容仅为81F·g -1 ,内阻 R 1为1.1Ω,离子扩散阻抗 W 1为2.5Ω。引入P123合成TiN粉体的比电容提升到95F·g -1 , R 1和 W 1均有所减小,分别为0.9Ω和0.06Ω。
The porous TiO 2 powders were prepared by sol-gel method using titanium tetrachloride as titanium source, P123 as template agent and cyanamide as stabilizer agent, respectively. The porous TiN powders were synthesized via reduction and nitridation of the porous TiO 2 powders at 900℃ in NH 3. The phase composition and microstructure of the porous TiN powders were characterized by the XRD, SEM, BET, TEM and SAXD. The electrochemistry performance of the porous TiN powders was evaluated through the cyclic voltammetry, AC impedance and constant current charge-discharge techniques. The results show that the porous powders have approximate spherical particles with cubic TiN phase. Compared to the porous TiN powders without P123 adding, the mesopores with pore diameter range of 10-50nm increased in the porous TiN powders with P123 adding. There are also some pores with size range of 2-3nm. Meanwhile the porous TiN powders with P123 adding exhibit more ordered mesopores. This porous structure can improve the electrochemistry performance of the TiN powders. As a result, for the porous TiN powders without P123 adding, the specific capacitance is 81F·g -1 . The internal resistance R 1 is 1.1Ω, and the ion diffusion impedance W 1 is 2.5Ω. For the porous TiN powders with P123 adding, the specific capacitance is increased to 95F·g -1 , the R 1 and W 1 value are decreased to 0.9Ω and 0.06Ω, respectively.
作者
呼世磊
刘盼
崔燚
倪洁
吕东风
魏恒勇
卜景龙
HU Shi-lei;LIU Pan;CUI Yi;NI Jie;LYU Dong-feng;WEI Heng-yong;BU Jing-long(College of Materials Science and Engineering,North China University ofScience and Technology,Tangshan 063009,Hebei,China;Hebei ProvincialKey Laboratory of Inorganic Non-metallic Materials,Tangshan 063009,Hebei,China;College of Automotive Studies,Tongji University,Shanghai 200092,China)
出处
《材料工程》
EI
CAS
CSCD
北大核心
2019年第9期93-100,共8页
Journal of Materials Engineering
基金
国家自然科学基金资助项目(51272066,51472072)
河北省自然科学基金资助项目(E2013209183)
华北理工大学青年科学研究基金资助项目(Z201413)
关键词
多孔TiN粉体
P123
还原氮化
电化学
porous TiN powder
P123
reduction and nitridation
electrochemistry
