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Phase Change Nanocapsules Enabling Dual-Mode Thermal Management for Fast-Charging Lithium-Ion Batteries.

Xin Geng1, Chenyang Wang1, Jing Chen1

  • 1School of Chemical Engineering, Sichuan University, Chengdu 610065, China.

ACS Nano
|April 19, 2024
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Summary

Phase change nanocapsules regulate temperature for fast-charging lithium-ion batteries (LIBs). This thermal management improves performance and safety in both low and high temperatures, preventing failures.

Keywords:
lithium-ion batteriesnanocapsulesphase change materialsphotothermal conversionthermal management

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Thermal Engineering

Background:

  • Fast-charging lithium-ion batteries (LIBs) performance is temperature-dependent.
  • LIBs face operational failures in extreme low or high temperatures due to Joule heating.
  • Effective thermal management is crucial for developing robust, fast-charging LIBs.

Purpose of the Study:

  • To develop a thermal engineering framework for temperature regulation in LIBs.
  • To enhance the safety and performance stability of fast-charging LIBs across temperature variations.

Main Methods:

  • Fabrication of phase change nanocapsules with polyurea shells decorated with polyaniline.
  • Utilizing the nanocapsules as a surface thermal regulating layer on LIBs.
  • Investigating light-to-heat conversion for low-temperature enhancement and latent heat storage for high-temperature modulation.

Main Results:

  • Polyaniline decoration enabled effective light-to-heat conversion, increasing temperature in cold conditions.
  • The n-octadecane core's latent heat storage capacity effectively managed heat release during high-rate charging.
  • The thermal regulating layer successfully prevented side reactions and thermal runaway at high temperatures.

Conclusions:

  • Phase change nanocapsules offer a promising solution for optimizing LIB operating temperatures.
  • This thermal regulator enhances the safety and performance stability of fast-charging LIBs.
  • Optimized thermal management is key to realizing the full potential of advanced battery technologies.