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

• Autorzy: Naik A. , Zhou J. , Gao C. , Liu G. , Wang L.

Identyfikatory

DOI

10.1515/msp-2015-0087

• Języki publikacji: EN

Abstrakty

EN

LiFe_0.95Cr_0.05PO₄/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. LiFe_0.95Cr_0.05PO₄/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.

Słowa kluczowe

EN

one step; solid state reaction; chromium incorporation; LiFe0; 95Cr0; 05PO4/C; higher current densities

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2015
• Tom: Vol. 33, No. 4
• Strony: 741--750
• Opis fizyczny: Bibliogr. 33 poz., rys., tab.

Twórcy

autor

Naik A.

• State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China

autor

Zhou J.

• State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China

autor

Gao C.

• State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China

autor

Liu G.

• State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China

autor

Wang L.

• Key Laboratory of Fiber Optic Sensing Technology and Information Processing, Ministry of Education, Wuhan University of Technology, Wuhan 430070, P. R. China

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