摘要
应用电化学交流阻抗法 (EIS)研究了不同荷电状态下的α Ni(OH) 2 的质子扩散系数 (使用Equivcrt软件拟合实验数据 )。结果表明 ,质子扩散系数是电极荷电状态的函数 ,在荷电状态为 2 0 %左右时 ,质子扩散系数具有最大值 ,并且在荷电状态大于 1 0 %时 ,均大于 β Ni(OH) 2 活性物质。在电极荷电状态为 0 %时 ,阻抗谱为半圆(在频率小于 1 0Hz时 ) ,未显示固相有限扩散控制的特征。从理论上讨论了此结果。
The electrochemical AC impedance spectrogram (EIS) was used for studying the proton diffusion coefficients (PDC) of α Ni (OH) 2 with various charges. The results show that PDC is a function of charge of state. When the state of charge is about 20%, PDC has the biggest value, and at>10% of state of charge, the PDC for α Ni (OH) 2 is bigger than β Ni(OH) 2. At 0% of state of charge a semi circle appears (<10 Hz), EIS does not display the solid phase limited diffusion characteristic. This result has been theoretically discussed. [
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2000年第5期656-658,共3页
The Chinese Journal of Nonferrous Metals
