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Non-aqueous Electrode Processing and Construction of Lithium-ion Coin Cells

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Published on: February 1, 2016

Gradient Multisite Adsorption of Porous Al-Based Anodes for Fast and Uniform Lithium Kinetic Transport.

Haitao Wang¹, Chuangyu Guo¹, Yiruo Ren¹

¹School of Science, Northeast Electric Power University, Jilin 132012, China.

ACS Applied Materials & Interfaces

|December 29, 2025

Summary

Researchers developed a novel surface modification for aluminum (Al) anodes in lithium-ion batteries (LIBs) using poly(ethylene oxide) and lithium bis(trifluoromethanesulfonyl)imide. This strategy enhances lithium-ion transport and stability, enabling over 500 cycles with 92.8% capacity retention.

Keywords:

Adsorption energy Al-based anode Gradient multisite adsorption Homogenous transport Interface engineering

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Area of Science:

Materials Science
Electrochemistry
Battery Technology

Background:

Aluminum (Al) anodes offer high theoretical capacity for lithium-ion batteries (LIBs).
Practical Al anodes face challenges like volume expansion, dendrite growth, and poor Li+ transport, limiting their use.
Developing stable and efficient Al anodes is crucial for next-generation energy storage.

Purpose of the Study:

To design inorganic-organic hybrid materials for Al anode surface modification.
To create a 3D transport channel and gradient adsorption sites for Li+ on Al anodes.
To improve the cycling stability and performance of Al-based LIBs.

Main Methods:

Synthesized poly(ethylene oxide) (PEO) and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) hybrid materials.
Applied the hybrid material to the Al anode surface to form a modified layer.
Investigated the Li+ adsorption and transport mechanisms using the modified anode.
Tested the electrochemical performance of NCM||Al-PEO-LiTFSI cells under various cycling rates.

Main Results:

The PEO-LiTFSI hybrid material created a uniform porous structure and enhanced Li+ adsorption.
The modified anode facilitated a two-step alloying reaction, improving Li+ flux redistribution and transport homogeneity.
The NCM||Al-PEO-LiTFSI cell demonstrated stable cycling over 500 cycles at 1 C with 92.8% capacity retention.
Excellent rate capability was observed, with 222.4 mA h/g at 5 C.

Conclusions:

The proposed surface modification strategy effectively addresses key limitations of Al anodes in LIBs.
The hybrid PEO-LiTFSI material enables stable and high-performance cycling of Al-based batteries.
This approach provides a practical pathway for developing advanced Al anodes for potential commercial applications.