<abstract xmlns="http://www.w3.org/1999/xhtml">LiFe0.95Cr0.05PO4/C was successfully synthesized by one-step solid-state reaction using a single mode microwave reactor. The effect of incorporation of chromium on LiFePO4 lattice parameters was systematically investigated by X-ray diffraction. Surface analysis was done by scanning electron microscopy and transmission electron microscopy. The ratio of amorphous to graphitic carbon was determined from Raman spectroscopic data. The influence of chromium incorporation on electrochemical properties was studied by recording charge/discharge cycles combined with electrochemical impedance spectroscopy (EIS) and cyclic voltammetry. It was found that Cr incorporation significantly enhanced the electrochemical performance of LiFePO4 at all current densities up to 10 C. LiFe0.95Cr0.05PO4/C prepared exhibited the best performance with an initial specific discharge capacity of 157.7, 144.8, 138.3, 131.0, 124.1 and 111.1 mAh·g−1 at 0.1 C, 0.5 C, 1.0 C, 2.0 C, 5 C and 10 C, respectively. The doped sample displayed excellent capacity retention, which was substantially superior than that of pristine LiFePO4/C at a higher current rate.</abstract>

LiFe0.95Cr0.05PO4/C was successfully synthesized by one-step solid-state reaction using a single mode microwave reactor. The effect of incorporation of chromium on LiFePO4 lattice parameters was systematically investigated by X-ray diffraction. Surface analysis was done by scanning electron microscopy and transmission electron microscopy. The ratio of amorphous to graphitic carbon was determined from Raman spectroscopic data. The influence of chromium incorporation on electrochemical properties was studied by recording charge/discharge cycles combined with electrochemical impedance spectroscopy (EIS) and cyclic voltammetry. It was found that Cr incorporation significantly enhanced the electrochemical performance of LiFePO4 at all current densities up to 10 C. LiFe0.95Cr0.05PO4/C prepared exhibited the best performance with an initial specific discharge capacity of 157.7, 144.8, 138.3, 131.0, 124.1 and 111.1 mAh·g−1 at 0.1 C, 0.5 C, 1.0 C, 2.0 C, 5 C and 10 C, respectively. The doped sample displayed excellent capacity retention, which was substantially superior than that of pristine LiFePO4/C at a higher current rate.

Impact of incorporation of chromium on electrochemical properties of LiFePO4/C for Li-ion batteries

State Key Laboratory of Advanced Technology for Materials Synthesis and Processing

Key Laboratory of Fiber Optic Sensing Technology and Information Processing

Ministry of Education, Wuhan University of Technology

Materials Science-Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Impact of incorporation of chromium on electrochemical properties of LiFePO/C for Li-ion batteries

LiFe0.95Cr0.05PO4/C was successfully synthesized by one-step solid-state reaction using a single mode microwave reactor. The effect of incorporation of...

Impact of incorporation of chromium on electrochemical properties of LiFePO₄/C for Li-ion batteries

Published Online: Jan 06, 2016

Page range: 742 - 750

Received: Dec 09, 2014

Accepted: May 26, 2015

DOI: https://doi.org/10.1515/msp-2015-0087

Keywords
one step solid state reaction, chromium incorporation, LiFeCrPO/C, higher current densities

© 2015 Amol Naik et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Impact of incorporation of chromium on electrochemical properties of LiFePO4/C for Li-ion batteries

Published Online: Jan 06, 2016

Page range: 742 - 750

Received: Dec 09, 2014

Accepted: May 26, 2015

DOI: https://doi.org/10.1515/msp-2015-0087

Keywordsone step solid state reaction, chromium incorporation, LiFeCrPO/C, higher current densities

© 2015 Amol Naik et al., published by De Gruyter Open

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Impact of incorporation of chromium on electrochemical properties of LiFePO₄/C for Li-ion batteries

Keywords
one step solid state reaction, chromium incorporation, LiFeCrPO/C, higher current densities