High-purity LiFePO4 prepared by a rapid one-step microwave-assisted hydrothermal synthesis
Source abstract
Abstract
A microwave-assisted hydrothermal synthesis route to prepare LiFePO4 (LFP) in a very short time and under a low temperature is proposed. Only 10 min at 200 °C was sufficient to produce a high-purity, single-phase LFP, with no need to perform a thermal treatment as a second step that is usual to enhance the structural properties of the material. The obtained LFP was structurally characterized by XRD, HR-TEM and FTIR spectroscopy and morphologically analyzed by SEM. Electrochemical impedance spectroscopy data allowed the estimation of the diffusion coefficient for the lithium ions (DLi+ = 2.0 × 10−14 cm2 s−1) in the LFP structure during the redox reactions related to the charge and discharge processes that occur in a Li-ion battery. Preliminary galvanostatic charge and discharge tests of the prepared LFP as a cathode in a Li-ion cell were carried out in a 1.0 mol L−1 LiPF6 EC/DMC 1:1 (V/V) electrolyte solution, allowing the estimation of the initial specific capacity (126 mA h g−1 at 0.1 C) and coulombic efficiency (94–99%). Hence, the here-reported rapid, clean and facile one-step synthesis of LFP allows the production of a material that has excellent structural properties and a promising electrochemical response, with significant savings in time and energy.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research
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References (63)
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