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Related Concept Videos

Electrodeposition01:08

Electrodeposition

597
Electrodeposition is a technique used to separate an analyte from interferents by electrochemical processes. Here, the analyte is a metal ion that can be deposited on an electrode immersed in the sample solution. The electrochemical setup consists of an anode and a cathode. When an electric current is applied to the setup, oxidation occurs at the anode. At the cathode, which consists of a large metal surface, metal ions undergo reduction and deposit onto the surface.
Electrodeposition can...
597

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Related Experiment Video

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Probing and Mapping Electrode Surfaces in Solid Oxide Fuel Cells
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Simultaneous Regulating the Surface, Interface, and Bulk via Phosphating Modification for High-Performance Li-Rich

Yuhang Lou1, Zedong Lin2, Jialong Shen1

  • 1Hefei National Research Center for Physical Sciences at the Microscale, National Synchrotron Radiation Laboratory, Department of Materials Science and Engineering, CAS Key Laboratory of Materials for Energy Conversion, University of Science and Technology of China. Hefei, Anhui, 230026, China.

Advanced Materials (Deerfield Beach, Fla.)
|December 10, 2024
PubMed
Summary

An innovative phosphating strategy enhances Li-rich Mn-based layered oxides (LRMOs) for high-energy-density lithium-ion batteries. This "all-in-one" modification improves cycle stability, rate capability, and voltage retention by stabilizing oxygen and preventing material degradation.

Keywords:
Li3PO4 coating layerLi‐rich Mn‐based layered oxidesoxygen redox reversibilityphosphatingphosphorus doping

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Li-rich Mn-based layered oxides (LRMOs) are promising cathode materials for high-energy-density lithium-ion batteries.
  • However, LRMOs suffer from voltage decay, poor cycle stability, and low rate performance due to oxygen release and transition metal dissolution.

Purpose of the Study:

  • To develop an "all-in-one" modification strategy for LRMOs to overcome their inherent limitations.
  • To simultaneously regulate the surface, interface, and bulk of LRMOs.

Main Methods:

  • An in-situ gas-solid interface phosphating reaction was employed to create P-doped Li1.2Mn0.54Ni0.13Co0.13O2@Spinel@Li3PO4.
  • The modification involved Li3PO4 surface coating, in-situ spinel interfacial layer construction, and P-doping to stabilize the lattice.

Main Results:

  • The phosphatized LRMO exhibited excellent capacity retention (82.1% at 1C after 300 cycles) and rate capability (170.5 mAh g-1 at 5C).
  • The modification effectively suppressed oxygen release, reduced transition metal dissolution, and enhanced Li+ diffusion.
  • Improved voltage maintenance and thermostability were also observed.

Conclusions:

  • The "all-in-one" phosphating strategy offers a novel and effective approach to enhance the electrochemical performance of LRMOs.
  • This method provides a pathway for developing next-generation high-energy-density lithium-ion batteries.