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Related Concept Videos

Electrodeposition01:08

Electrodeposition

663
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...
663

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In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries
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Elucidating local diffusion dynamics in nickel-rich layered oxide cathodes.

Beth I J Johnston1,2, Innes McClelland1,2, Peter J Baker3,2

  • 1Department of Materials Science and Engineering, The University of Sheffield, Sir Robert Hadfield Building, Sheffield, S1 3JD, UK. beth.johnston@sheffield.ac.uk.

Physical Chemistry Chemical Physics : PCCP
|September 18, 2023
PubMed
Summary

Investigating lithium-ion (Li-ion) transport in nickel-rich cathodes is key for better batteries. Higher nickel content improves Li-ion diffusion, crucial for high energy density applications.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Solid-State Chemistry

Background:

  • Optimizing electrochemical performance in high energy density lithium-ion batteries requires understanding Li-ion transport in Ni-rich cathodes.
  • Ni-rich layered oxides are promising cathode materials but face challenges in Li-ion diffusion.

Purpose of the Study:

  • To elucidate the local-scale Li-ion diffusion characteristics in microwave-prepared Ni-rich layered oxide cathodes.
  • To investigate the impact of cation dopants and increasing nickel content on Li-ion transport properties.

Main Methods:

  • Muon spin relaxation (μSR) techniques were employed to probe local Li-diffusion dynamics.
  • A series of Ni-rich layered oxide cathodes with varying nickel content and dopants were synthesized using microwave methods.

Main Results:

  • Local Li-diffusion properties were found to improve with increasing nickel content in the studied cathode materials.
  • The observed improvements in Li-ion transport are dependent on substitutional effects introduced by dopants.

Conclusions:

  • Microwave-assisted synthesis provides a viable route to Ni-rich cathodes with enhanced Li-ion transport.
  • Understanding dopant effects on Li-ion diffusion is critical for designing next-generation high energy density batteries.