Polaron transport mechanism in maricite NaFePO4: A combined experimental and simulation study
Polaron transport mechanism in maricite NaFePO4: A combined experimental and simulation study
复制标题
海云石 NaFePO4 中的极化子输运机制:实验与模拟相结合的研究
DOI:
10.1016/j.jpowsour.2020.228348
复制
发表时间:
2020
影响因子:
9.2
通讯作者:
P. Kaghazchi
中科院分区:
文献类型:
--
作者:
M. Sharma;Sevi Murugavel;P. Kaghazchi
We report, for the first time, systematic investigations on electronic properties of maricite NaFePO4with different crystallite sizes by a combined experimental and theoretical approach. Ac impedance spectroscopy has been used to study the polaron transport behaviour in maricite NaFePO4structure with different crystallite sizes over a wide range of temperatures. With the decrease in crystallite size, we observe a polaronic conductivity enhancement of approximately an order of magnitude at the nanoscale level as compared with its bulk counterpart. The temperature dependent dc conductivity has been analysed within the framework of the Mott model of polaron hopping and various physical parameters relevant for the polaron hopping process were extracted. Additionally, by introducing an approximated Mott model with calculated hole polaron migration barrier from density functional theory, we evaluated the polaronic conductivity as function of crystallite size in fair agreement with experimental data. The enhanced polaronic conductivity with crystallite size reduction is found to be due to the combined effect of increased polaron concentration, reduced hopping length, and lowered migration barrier.
登录
查看更多内容
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
D. Sidebottom
通讯作者:
D. Sidebottom
DOI:
10.1039/c9cp03838h
发表时间:
2019
期刊:
Physical chemistry chemical physics : PCCP
影响因子:
--
作者:
M. Sharma;P. Kaghazchi;Sevi Murugavel
通讯作者:
Sevi Murugavel
DOI:
--
发表时间:
2017
期刊:
影响因子:
--
作者:
Ashkan Moradabadi;P. Kaghazchi
通讯作者:
P. Kaghazchi
DOI:
--
发表时间:
2013
期刊:
Physical Chemistry, Chemical Physics - PCCP
影响因子:
--
作者:
R. Shahid;S. Murugavel
通讯作者:
S. Murugavel
影响因子:
3.9
作者:
Yonemura, M;Yamada, A;Kanno, R
通讯作者:
Kanno, R