PlumX Metrics
Embed PlumX Metrics

Ionic transport kinetics of selective electrochemical lithium extraction from brines

Electrochimica Acta, ISSN: 0013-4686, Vol: 475, Page: 143519
2024
  • 10
    Citations
  • 0
    Usage
  • 11
    Captures
  • 0
    Mentions
  • 0
    Social Media
Metric Options:   Counts1 Year3 Year

Metrics Details

  • Citations
    10
    • Citation Indexes
      10
  • Captures
    11

Article Description

Lithium extraction from brines by electrochemical De-intercalation/Intercalation method with LiFePO 4 as host materials has attracted extensive attention, but the ionic transport properties and rate-determining step of this process are not fully understood. Therefore, to address this knowledge gap, we study the electrode process kinetics of LiFePO 4 /Li 1- x FePO 4 (0 < x < 1) in brines by electrochemical impedance spectroscopy. The results reveal that the diffusion of Li + in electrode is the rate-determining step, the apparent diffusion coefficient D Li shows a trend of first increasing and then decreasing with the increase of electrode coating density, and the maximum value is obtained as 2.23 × 10 −11 cm −2 ·s −1 at 55 mg·cm −2. The charge transfer resistance R ct and Warburg impedance Z ω decrease with increasing temperature and do not change significantly with Li + concentration, but Mg 2+ has an inhibitory effect on Li + charge exchange. Furthermore, the Li + charge transfer at electrode/solution interface is differentiated for different de-lithiated Li 1- x FePO 4 electrodes, the R ct reaches a minimum around Li 0.3 FePO 4. The diffusion of other competing cations is more difficult than Li + in electrodes, which gives theoretical support for selective lithium extraction from brines from a kinetic point of view.

Provide Feedback

Have ideas for a new metric? Would you like to see something else here?Let us know