Micro-Supercapacitor Technologies for Energy Storage Applications

Micro-supercapacitors are miniaturised electrochemical storage devices that bridge the gap between conventional capacitors and batteries, offering high power density, rapid charge–discharge capability and excellent cycle stability. Their planar, often interdigitated architectures enable seamless on-chip integration in portable electronics, wearable sensors and Internet-of-Things nodes. Key challenges include maximising energy density within a limited footprint, achieving scalable fabrication and ensuring mechanical flexibility for emerging form factors. Recent progress has centred on advanced electrode materials—such as two-dimensional carbons, transition-metal dichalcogenides and pseudocapacitive composites—and novel microfabrication techniques ranging from maskless laser patterning to inkjet printing. Coupled with solid-state and hybrid electrolytes, these innovations have yielded devices with record volumetric energy densities and series-stack voltage windows compatible with microsystem requirements. As demands for autonomous microsensor networks and medical implants grow, micro-supercapacitor technologies are set to play a pivotal role in decentralised, sustainable energy storage solutions.

Research from Nature Portfolio

Recent studies have demonstrated an ultrafast, maskless femtosecond-laser approach capable of producing thousands of symmetric and asymmetric micro-supercapacitors per minute with submicrometre resolution. Utilising MXene/1T-MoS₂ hybrids and their laser-derived oxides, these devices exhibit exceptional areal capacitances (over 200 mF cm⁻²), volumetric energy densities approaching 0.5 Wh cm⁻³ and power densities above 20 kW cm⁻³, while enabling series assembly up to 50 V. In parallel, a seamlessly integrated wireless-charging micro-supercapacitor has been realised using graphite-paper coils and electrodes in a unified system. This device achieves a record energy density of 460 µWh cm⁻², rapid six-minute recharge to full capacity and immediate high-power output, opening avenues for contactless micro-robotics and flexible electronics. Foundational work on microminiaturised honeycomb alumina nanoscaffolds has further shown that nanometre-thin, stiff architectures can synergise high surface area with efficient ion transport, enabling compact electrodes that deliver industry-leading performance within confined footprints.

Micro-Supercapacitor Technologies for Energy Storage Applications publication trend

The graph below shows the total number of articles in micro-supercapacitor technologies for energy storage applications across all publications each year (not limited to Nature Index journals).

Technical terms

Micro-supercapacitor: A miniaturised electrochemical energy storage device with interdigitated electrodes designed for on-chip integration.

Areal capacitance: Capacitance per unit electrode area, expressed in mF cm⁻², indicating charge storage density on thin films.

Volumetric energy density: Energy stored per unit volume (Wh cm⁻³), critical for compact device applications.

Interdigitated electrode: A comb-like electrode pattern that increases electrode surface area and shortens ion diffusion paths.

Pseudocapacitance: Faradaic charge storage mechanism involving surface redox reactions, enhancing overall capacitance beyond double-layer effects.

References

1. Laser maskless fast patterning for multitype microsupercapacitors. Nature Communications (2023).
2. A seamlessly integrated device of micro-supercapacitor and wireless charging with ultrahigh energy density and capacitance. Nature Communications (2021).
3. Nanoelectrode design from microminiaturized honeycomb monolith with ultrathin and stiff nanoscaffold for high-energy micro-supercapacitors. Nature Communications (2020).
4. Pushing the Electrochemical Performance Limits of Polypyrrole Toward Stable Microelectronic Devices. Nano-Micro Letters (2023).
5. 3D Crumpled Ultrathin 1T MoS2 for Inkjet Printing of Mg-Ion Asymmetric Micro-supercapacitors. ACS Nano (2020).
6. Recent developments of advanced micro-supercapacitors: design, fabrication and applications. npj Flexible Electronics (2020).