Novel synthesis of low carbon-coated Li3V2(PO4)3 cathode material for lithium-ion batteries

• Published in: Journal of alloys and compounds Vol. 570; pp. 61 - 64
• Main Authors: Zhang, Lu-Lu, Duan, Song, Peng, Gang, Liang, Gan, Zou, Feng, Huang, Yun-Hui
• Format: Journal Article
• Language: English
• Published: Kidlington Elsevier B.V 05.09.2013; Elsevier
• Subjects: Alloys; Applied sciences; Cathode material; Cathodes; Chemistry; Condensed matter: structure, mechanical and thermal properties; Direct energy conversion and energy accumulation; Discharge; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrochemical performance; Electrochemistry; Electrodes: preparations and properties; Electronics; Exact sciences and technology; General and physical chemistry; Lithium ion battery; Lithium vanadium phosphate; Lithium-ion batteries; Particle size; Physics; Refluxing; Scanning electron microscopy; Structure of solids and liquids; crystallography; Structure of specific crystalline solids; Synthesis; Cathode material; Lithium ion battery; Electrochemical performance; Refluxing; Lithium vanadium phosphate; Raman spectra; Particle size; Electrical conductivity; Electronic conductivity; XRD; Electrode material; Fine particle; Charge transfer; Crystal structure; Scanning electron microscopy; Electronic properties; Monoclinic lattices; Carbon; Coated material; Lithium battery; Electrochemical properties; Composite materials; Lithium phosphate; Morphology; Solid state reaction; Microstructure
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/j.jallcom.2013.03.189

•LVP/C is successfully prepared by a novel refluxing-assisted solid-state reaction.•The LVP/C composite contains much lower carbon than that prepared by hydrothermal method.•The LVP/C exhibits more uniform morphology and a smaller size.•The LVP/C shows a desirable electrochemical performance. A novel refluxing-assisted solid-state reaction (RE-SSR) has been developed to prepare Li3V2(PO4)3/C (LVP/C) composite; hydrothermal-assisted solid-state reaction (HT-SSR) method is employed for comparison. The as-obtained composites have been characterized with XRD, Raman spectrum, SEM, and electrochemical measurements. XRD results indicate that the samples are well indexed as monoclinic LVP. Low carbon-coated LVP prepared by RE-SSR (LVP/C(RE)) shows better electronic conductivity and lower charge-transfer resistance. For LVP/C(RE), SEM image shows uniform morphology and small particle size. It delivers a high initial discharge capacity of 162.3mAhg−1 at 0.1C and an average capacity of 138.5mAhg−1 at 0.5C. Our experiments demonstrate that the low carbon-coated LVP cathode material prepared by RE-SSR exhibits better electrochemical performance than that prepared by HT-SSR.