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- Title
Effects of phenolic resin on the electrochemical performance of LiV(PO)/C cathode materials.
- Authors
Li, Lingfang; Han, Shaochang; Fan, Changling; Zhang, Kehe; Chen, Jin; Zhang, Xiang
- Abstract
As a kind of lithium-ion battery cathode material, monoclinic lithium vanadium phosphate/carbon LiV(PO)/C was synthesized by adopting phenolic resin as carbon source, both for reducing agent and coating material. The crystal structure and morphology of the samples were characterized through X-ray diffraction (XRD) and scanning electron microscope (SEM). Galvanostatic charge-discharging experiments and electrochemical impedance spectrum (EIS) were utilized to determine the electrochemical insertion properties of the samples. XRD data revealed that phenolic resin does not change the crystal structure of LiV(PO)/C. Furthermore, the morphology of grains and the electronic conductivity of LiV(PO)/C were improved. Galvanostatic charge-discharging and EIS results showed that the optimal electrochemical properties and the minimum charge-transfer resistance of LiV(PO)/C can be reached when added by 5 wt.% of redundant carbon (except the carbon needed to reduce V to V). The initial discharge capacity is 128.4 mAh g at 0.2 C rate and 101.2 mAh g at 5 C in the voltage range of 3.0∼4.3 V.
- Subjects
NANOSTRUCTURED materials; LITHIUM-ion batteries; X-ray diffraction; SCANNING electron microscopes; VANADIUM phosphate; PHENOLIC resins
- Publication
Journal of Solid State Electrochemistry, 2014, Vol 18, Issue 6, p1751
- ISSN
1432-8488
- Publication type
Article
- DOI
10.1007/s10008-014-2410-6