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$In Situ Neutron Powder Diffraction Using Custom-made Lithium-ion Batteries$

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Extremely fast-charging lithium ion battery enabled by dual-gradient structure design.

Lei-Lei Lu^1,2, Yu-Yang Lu³, Zheng-Xin Zhu^1,2

¹Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China, Hefei, Anhui 230026, China.

Science Advances

|April 29, 2022

Summary

Researchers developed a novel graphite anode with a dual-gradient structure for extremely fast-charging lithium-ion batteries. This design significantly improves charging speed and energy density, overcoming limitations in electric vehicle recharging times.

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Characterization of Electrode Materials for Lithium Ion and Sodium Ion Batteries Using Synchrotron Radiation Techniques

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Published on: November 11, 2013

Area of Science:

Materials Science
Electrochemistry
Energy Storage

Background:

Graphite anodes limit the rate capability of lithium-ion batteries, hindering fast charging for electric vehicles.
Poor rate capability in conventional graphite anodes necessitates innovative structural designs for enhanced performance.

Purpose of the Study:

To design and develop a novel graphite anode with a unique particle size and electrode porosity dual-gradient structure.
To achieve extremely fast-charging lithium-ion batteries by addressing the limitations of traditional graphite anodes.

Main Methods:

Development of a polymer binder-free slurry route to construct the dual-gradient graphite anode.
Fabrication of practical graphite anodes incorporating the particle size-porosity dual-gradient structure.

Main Results:

The dual-gradient graphite anode demonstrated extremely fast-charging capability, achieving 60% recharge in 10 minutes.
The developed lithium-ion battery achieved 60% recharge in just 6 minutes at a high charging rate of 6 C.
A high volumetric energy density of 701 Wh liter⁻¹ was achieved with the dual-gradient graphite anode.

Conclusions:

The particle size and electrode porosity dual-gradient structure is a previously unreported design for graphite anodes.
This innovative anode structure enables extremely fast charging and high energy density in lithium-ion batteries.
The findings pave the way for overcoming recharging time limitations in electric vehicles.