NiTe电极材料的制备及其在超级电容器中的应用  

Preparation of NiTe Electrode Material and Its Application in Supercapacitor

作　　者：叶蓓融 龚超 黄妙良[1] 刘培德[1] 范乐庆[1] 林建明[1] 吴季怀[1] 

机构地区：[1]华侨大学材料科学与工程学院,材料物理化学研究所,环境友好功能材料教育部工程研究中心,厦门361021

出　　处：《人工晶体学报》2018年第1期9-17,共9页Journal of Synthetic Crystals

基　　金：国家自然科学基金“促进海峡两岸科技合作联合基金”重点项目(U1205112);福建省自然科学基金(2010J01289)

摘　　要：采用二氧化碲(TeO_2)为碲源,泡沫镍作为镍源及基底,水合肼(N_2H_4·H_2O)为还原剂,利用一步水热法原位生长片状Ni Te材料。将制得的Ni Te作为超级电容器的电极材料,研究了水热温度对产物的微观形貌及电化学性能的影响规律,结果表明:当水热温度为180℃时,所制得的Ni Te为均匀的片状结构,在三电极体系下获得的Ni Te电极最大的质量比电容为603.6 F·g^(-1)。利用Ni Te和AC分别作为正极和负极,制备了非对称超级电容器(ASC)。NiTe//AC ASC可以将电位窗口扩展到1.6 V,最大的能量密度和功率密度分别为25.8 Wh·kg^(-1)和3994W·kg^(-1)。ASC显示出良好的循环稳定性,5000次循环之后保持了初始电容的83.3%。The flake-like NiTe materials were successfully synthesized by one-step hydrothermal method using TeO2 as tellurium source, nickel foam as the nickel source and substrate and hydrazine hydrate （N2 H4 · H2O） as the reducing agent. The effects of hydrothermal temperature on the microstructure and electrochemical properties of the product were studied by using NiTe as the electrode material of Supercapacitor. Results shown that when the reaction temperature was 180 ℃, the prepared NiTe bad a homogeneous flake-like structure. The maximum specific capacitance of NiTe electrode obtained under the three-electrode system was 603.6 F·g-1. In addition, an asymmetric supercapacitor （ASC） was prepared using NiTe and AC as positive and negative electrode, respectively. The NiTe//AC ASC could extend the potential window to 1.6 V and had the maximum energy density and power density of 25.8 Wh ·kg-1 and 3994 W ·kg-1, respectively. In addition, ASC exhibited good circulatory stability, 83.3% of initial specific capacitance was maintained after 5000 cycles.

关 键 词：NI TE 原位生长 非对称超级电容器 

分 类 号：TM53[电气工程—电器] O614.813[理学—无机化学]