摘要
通过水热合成实现三维花状纳米结构α-Ni(OH)2和正多面体结构Ni(HCO3)2的制备,研究其特殊形貌对电极材料充放电性能的影响。结果表明:三维花状纳米结构的电极材料比电容较高,电流密度为2.0A·g^-1时,比电容最高为1212.12F·g^-1,电流密度为1.0A·g^-1时循环10000次后的容量保持率为76%。由于α-Ni(OH)2三维花状结构中较薄的纳米片厚度,极大的增加了活性物质与电解液的接触面积,为电解液中离子顺畅进出材料内部提供了便利,使得赝电容反应更加充分,有利于电化学性能的迅速提升。
The preparation of three-dimensional flower structureα-Ni(OH)2 and regular polyhedron structure Ni(HCO3)2 was realized by hydrothermal synthesis method.The effects of nickel base morphology on the charging and discharging properties of electrode materials were studied.The results show that the specific capacitance of the three-dimensional flower-shaped nanostructure is higher,the maximum specific capacitance is 1212.12 F·g^-1 when the current density is 2.0 A·g^-1.After 10,000 cycles,the capacity retention rate was 76%when the current density is 1.0 A·g^-1.Due to the thin nanometer thickness in theα-Ni(OH)2 three-dimensional flower-shaped nanostructure,the contact area between the active substance and the electrolyte is greatly increased.This structure facilitates the ions in the electrolyte to enter and exit the material more smoothly,and makes the pseudocapacitance reaction more adequate,which is conducive to the improvement of electrochemical performance.
作者
刘文文
朱鹏程
向康宁
黄杰
姚丹
LIU Wen-wen;ZHU Peng-cheng;XIANG Kang-ning;HUANG Jie;YAO Dan(College of Enginering,Yantai Nanshan College,Yantai 265713,China)
出处
《人工晶体学报》
EI
CAS
北大核心
2019年第7期1320-1325,1349,共7页
Journal of Synthetic Crystals
基金
山东省自然科学基金(ZR2017BEM034)
