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Diammonium Hydrogen Citrate-Assisted Spray Pyrolysis Synthesis of Nanostructured LiCoPO Microspheres as High-Voltage Cathode Material for Lithium-Ion Batteries. | LitMetric

AI Article Synopsis

  • Researchers developed nanostructured LiCoPO (LCP) microspheres using a one-step spray pyrolysis method with an additive called diammonium hydrogen citrate (DHC).
  • The resulting LCPs displayed an orthorhombic olivine structure and improved surface area due to the unique effects of DHC during the process.
  • The LCPs demonstrated high initial discharge capacity (132 mA/h/g) and good cycle stability, with further improvements seen when using a fluorinated electrolyte.

Article Abstract

Nanostructured LiCoPO (LCP) microspheres were successfully synthesized by one-step spray pyrolysis, adding an appropriate amount of diammonium hydrogen citrate (DHC) additive to the precursor solution. Comprehensive physical characterization confirmed that the obtained LCPs exhibited a desirable orthorhombic olivine structure with nanostructured morphology and a significant increase in specific surface area. This enhancement was attributed to the dispersion effect due to the carboxyl group and the evolution of the ammonium group of DHC during the pyrolysis process. The resultant LCP delivered a high initial discharge capacity of 132 mA h g with 63.3% capacity retention (vs 103 mA h g and 37.1% of bare-LCP) after 50 cycles at 0.1 C using the conventional electrolyte. Moreover, the electrochemical performance showed additional enhancement when a fluorinated electrolyte was introduced, resulting in initial and 50th discharge capacities of 141 and about 100 mA h g, respectively, at 0.1 C.

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Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11425712PMC
http://dx.doi.org/10.1021/acsomega.4c03752DOI Listing

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