Key Takeaways & Executive Findings
- •• 3D printing enables fabrication of MSC electrodes with stable macrostructure and GA-crosslinked micropore structure. • Surface modification with MoS2 nanosheets significantly enhances electrochemical performance. • Achieved ultra-high areal capacitance of 3.99 F cm−2 and energy density of 1997 mWh cm−2. • The method offers a simple, efficient route for high-performance MSC electrodes suitable for portable electronics.
Abstract
Micro-supercapacitors (MSCs) are of interest because of their high power density and excellent cycling performance, offering a broad array of potential applications. However, preparing electrodes for the MSCs with an extremely high areal capacitance and energy density remains a challenge. We constructed MSC electrodes with an ultra-high area capacitance and a high energy density, using reduced graphene oxide aerogel (GA) and MoS2 as the active materials, combined with 3D printing and surface modification. Using 3D printing, we obtained electrodes with a stable macrostructure and a GA-crosslinked micropore structure. We also used a solution method to load the surface of the printed electrode with molybdenum disulfide nanosheets, further improving the electrochemical performance. The surface capacitance of the electrode reached 3.99 F cm−2, the power density was 194 μW cm−2, and the energy density was 1 997 mWh cm−2, confirming its excellent electrochemical performance and cycling stability. This work provides a simple and efficient method for preparing MSC electrodes with a high areal capacitance and energy density, making them ideal for portable electronic devices.
1. Introduction
Supercapacitors, a circuit component with fast charge/discharge property, hold great potential for powering future portable energy-storage devices due to their outstanding cycling performance, excellent operational safety, and high power density, compared with lithium-ion batteries, sodium-ion batteries, and the conventional capacitors[1]. Compared with traditional energy storage devices with large volume, low mass loading and poor toughness, micro-supercapacitors (MSCs) are the ideal choice for portable energy storage devices[2]. Nevertheless, the decreased volume poses a challenge as the areal capacitance, energy density, and power density fall short of meeting the requirements. As for the current preparation methods of common MSCs electrodes, the traditional coating technology with low efficiency has strict requirements regarding the flatness of the substrate. In addition, the low load mass of traditional 2D thin film electrode limits its core competitiveness in large-scale applications[3]. These are the prominent problems hindering the preparation of MSCs electrodes.
Customizing the shape of electrodes and enhancing utilization of the loaded mass and volume are clearly effective strategies for enhancing the performance of MSCs[4]. Among them, the interleaved grid structure is an ideal structure. For the MSC electrodes high mass loading of active material per unit area and short distance between electrode lines can greatly promote the rapid transport of ions and electrons[5].
The 3D reduced graphene oxide aerogel (GA) is constructed from graphene sheets in 3D space. Graphene retains its properties while possessing the traits of aerogel, including ultra-low density and high specific surface area. The wide range of applications in energy storage, adsorption, catalysis and other areas make GA highly promising. MoS2 exhibits pseudocapacitive behavior and possesses a characteristic 2D-layered structure similar to graphene.
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WANG Meng-ya, LI Shi-you, GAO Can-kun, FAN Xiao-qi, QUAN Yin, LI Xiao-hua, LI Chun-lei, ZHANG Ning-shuang (2025). The production of electrodes for microsupercapacitors based on MoS2-modified reduced graphene oxide aerogels by 3D printing. SinoTechIntel Verified Research. https://doi.org/10.1016/S1872-5805(NCM2024-39-02-07)
Research & Educational Purpose Only:The translations, structured abstracts, analytical annotations, and data reports provided by SinoTechIntel are intended exclusively for academic research, internal corporate R&D, and educational benchmarking. They do not constitute formal engineering, chemical safety, legal, or professional advice.
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Frequently Asked Questions
What is the main achievement of this research?
The research successfully fabricated micro-supercapacitor electrodes with ultra-high areal capacitance (3.99 F cm−2) and high energy density (1997 mWh cm−2) using 3D printing and MoS2 surface modification of reduced graphene oxide aerogels.
How were the electrodes prepared?
The electrodes were prepared via 3D printing of reduced graphene oxide aerogel to form a stable macrostructure, followed by solution-based loading of MoS2 nanosheets onto the printed electrode surface.
What are the key advantages of using 3D printing for MSC electrodes?
3D printing allows customization of electrode shape, enhances mass and volume utilization, and enables high mass loading per unit area with short ion transport distances, improving overall performance.
What role does MoS2 play in the electrode performance?
MoS2 exhibits pseudocapacitive behavior and its 2D-layered structure similar to graphene enhances the electrochemical performance by increasing capacitance and energy density.
What are the potential applications of these electrodes?
The high areal capacitance and energy density make these electrodes ideal for portable electronic devices, such as wearable electronics and compact energy storage systems.
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