多级结构CoNiO2/TiN复合纤维的制备及电化学性能  

Fabrication of CoNiO2/TiN Composite Fibers with Hierarchial Structure and Their Electrochemical Performance

作　　者：刘盼 朱彬 吕东风 崔帅 崔燚 魏颖娜 魏恒勇 卜景龙 LIU Pan;ZHU Bin;LYU Dongfeng;CUI Shuai;CUI Yi;WEI Yingna;WEI Hengyong;BU Jinglong(College of Material Science and Engineering,North China University of Science and Technology,Tangshan 063009,China;Key Laboratory for Inorganic Nonmetallic Materials of Hebei Province,Tangshan 063009,China)

机构地区：[1]华北理工大学材料科学与工程学院,唐山063009 [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》2020年第10期10024-10029,共6页Materials Reports

基　　金：国家自然科学基金(51272066,51472072);河北省自然科学基金(E2013209183,E2019209474);华北理工大学杰出青年基金(JQ201712)。

摘　　要：以钛酸丁酯为钛源,PVP为助纺剂,通过静电纺丝结合氨气还原氮化法制备出TiN纤维,再利用水热法在TiN纤维表面生长CoNiO 2纳米线,得到多级结构CoNiO 2/TiN复合纤维。利用XRD、XPS、SEM及BET等表征纤维的物相、形貌和孔结构。结果表明,纤维为立方相TiN,其直径约为280 nm。经水热处理后,TiN纤维表面生长有直径约10 nm的CoNiO 2纳米线。其中,镍、钴元素分别以Ni^2+/Ni^3+和Co^2+/Co^3+价态形式存在。CoNiO 2/TiN复合纤维比表面积增加至123.8 m^2/g,平均孔径为13.6 nm,孔容达到0.4 cm^3/g。CoNiO 2/TiN复合纤维电极材料储能过程中双电层与赝电容并存,在100 mA/g充放电电流密度下其比电容达到205.4 F/g。当功率密度为66.6 W/kg时,能量密度为26.8 Wh/kg。TiN fibers were prepared by electrospinning combined with ammonia reduction nitridation process using butyl titanate as the titanium source and PVP as spinning agent.The CoNiO 2/TiN composite fibers with hierarchial structure were obtained via hydrothermal method,in which the CoNiO 2 nanowires grew on TiN fibers surface.The XRD,XPS,SEM and BET results indicated that the TiN fibers had cubic phase with the diameter of about 280 nm.The CoNiO 2 nanowires with a diameter of about 10 nm were grown on the TiN fibers after hydrothermal treatment.Nickel and cobalt elements were present in the form of Ni^2+/Ni^3+and Co^2+/Co^3+respectively.The fibers had a mesoporous structure that the average pore size was 13.6 nm and the specific surface area was 123.8 cm^2/g.The pore volume of CoNiO 2/TiN fibers was 0.4 cm^3/g.The CoNiO 2/TiN composite fibers electrode exhibits the characteristics of electric double layer and pseudo capacitance.At the same time,the specific capacitance of CoNiO 2/TiN fibers reached 205.4 F/g at current density of 100 mA/g.When the power density was 66.6 W/kg,the energy density was 26.8 Wh/kg.

关 键 词：CoNiO2/TiN 复合纤维 水热法 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]