Use of carbon pyrolyzed from rice husk in LiFePO4/V/C composite and its performance for lithium ion battery cathode

2nd international Tropical Renewable Energy Conference 2017

Sofyan, N.^1,2 ; Sekaringtyas, P.^1 ; Zulfia, A.^1,2 ; Subhan, A.^3

Department of Metallurgical and Materials Engineering, Faculty of Engineering, Universitas Indonesia, Depok

16424, Indonesia^1

Tropical Renewable Energy Center, Faculty of Engineering, Universitas Indonesia, Depok

16424, Indonesia^2

Research Center for Physics, Indonesian Institute of Science (LIPI), Puspiptek Serpong, Cisauk-Banten

15314, Indonesia^3

关键词: Cheap resources;    Hydrothermal routes;    LiFePO4;    Lithium-ion battery cathodes;    Rice husk;    Vanadium concentration;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/105/1/012023/pdf
DOI  :  10.1088/1755-1315/105/1/012023

来源: IOP

【 摘 要 】

The characteristics of activated carbon pyrolyzed from rice husk used in the synthesis of LiFePO4/V/C for the development of lithium ion battery cathode has been examined. The synthesis was begun by synthesizing LiFePO4(LFP) via hydrothermal route using the precursors in stoichiometric amounts of LiOH, NH4H2PO4, and FeSO4.7H2O. The assynthesized LFP was then added with variation of vanadium concentrations and a fix concentration of the carbon pyrolyzed from rice husk to form a composite of LiFePO4/V/C. The composites were characterized using X-ray diffraction (XRD), scanning electron microscope (SEM), and electrochemical impedance spectroscopy (EIS). The XRD results showed that the LiFePO4/V/C has been successfully formed whereas SEM results showed a difference in morphology of vanadium and activated carbon addition. The EIS results showed that the conductivity of LiFePO4/C-0 wt.% V is 1.0196×10-2S/cm, LiFePO4/C-3 wt.% V is 1.0302×10-2S/cm, LiFePO4/C-5 wt.% V is 6.1282×10-3S/cm, and LiFePO4/C-7 wt.% V is 8.3843×10-3S/cm. The best performance for lithium ion battery cathode was given by LiFePO4/V/C at 3 wt.% vanadium. This result indicated that rice husk can be used as a cheap resource for activated carbon in the development of lithium ion battery cathode.