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Hierarchically Superstructured Anisotropic Carbon Particles by Multiscale Assembly Driven by Spinodal Decomposition.

Minkyeong Ban¹, Jisung Lee¹, Jioh Kim¹

¹Department of Chemical and Biomolecular Engineering, Korea Advanced Institute of Science and Technology (KAIST), 291 Daehak-Ro, Yuseong-gu, Daejeon, 34141, South Korea.

Small (Weinheim an Der Bergstrasse, Germany)

|November 15, 2023

Summary

Researchers developed a new method to create anisotropic carbon superstructures with controlled shapes and sizes. These novel materials show promise for advanced energy storage applications, particularly in potassium-ion batteries.

Keywords:

anisotropic oblate shape carbon nanorod superstructures mesoporous materials polymer blends potassium‐ion batteries

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Area of Science:

Materials Science
Nanotechnology
Electrochemistry

Background:

Hierarchical superstructures exhibit unique shape-dependent properties.
Achieving controlled anisotropic carbon superstructures with tunable dimensions remains a challenge.

Purpose of the Study:

To develop a novel hierarchical assembly technique for synthesizing anisotropic oblate mesoporous carbon superstructures (o-MCS).
To demonstrate precise control over the size, shape, and building block dimensionality of these carbon materials.
To evaluate the performance of o-MCS as anode materials in potassium-ion batteries.

Main Methods:

Utilized spinodal decomposition (SD) integrated with block-copolymer (BCP) self-assembly in binary polymer blends.
Leveraged polymer-polymer interface behaviors to form anisotropic oblate particles with ordered nanorod arrays.
Characterized the synthesized o-MCS and tested their electrochemical performance in potassium-ion batteries.

Main Results:

Successfully synthesized anisotropic oblate mesoporous carbon superstructures (o-MCS) with controllable dimensions.
Demonstrated the ability to precisely control particle size, shape, and nanorod array dimensionality.
Achieved a specific capacity of 156 mA h g⁻¹ at 2 A g⁻¹ and long-term stability over 3000 cycles in potassium-ion battery anodes.

Conclusions:

The hierarchical assembly technique provides a viable strategy for designing and synthesizing anisotropic carbon materials.
The o-MCS demonstrate significant potential as high-performance anode materials for potassium-ion batteries.
This work opens new avenues for advanced materials in energy storage and other applications.