IN NEWS: Novel Supercapacitors with Dual-Functional Porous Graphene for High-Performance Energy Storage
Introduction
Researchers at the International Advanced Research Centre for Powder Metallurgy and New Materials under the Department of Science and Technology (DST) have developed a high-voltage supercapacitor based on a dual-functional porous graphene carbon nanocomposite (PGCN) electrode. The innovation enables operation at 3.4 V, surpassing the conventional 2.5–3.0 V limitation of commercial supercapacitors. The development can significantly improve the performance of electric vehicles (EVs), renewable energy systems, and portable electronics by providing higher energy density, faster acceleration, compact module design, and improved durability.
What are Supercapacitors?
Supercapacitors are advanced energy-storage devices that bridge the gap between conventional capacitors and batteries. They are known for:
- Rapid charging and discharging
- High power density
- Long operational life
- Excellent cyclic stability
However, conventional supercapacitors face limitations due to:
- Low operating voltage range
- Electrolyte instability at higher voltages
- Flammability concerns
- Lower energy density compared to batteries
Key Innovation in the PGCN-Based Supercapacitor
The newly developed technology uses a dual-functional porous graphene carbon nanocomposite (PGCN) electrode engineered to overcome the limitations of traditional systems.
Major Technological Advancements
| Feature | Conventional Supercapacitors | PGCN-Based Supercapacitor |
|---|
| Operating Voltage | 2.5–3.0 V | 3.4 V |
| Energy Density | Lower | 33% Higher |
| Cycle Stability | Moderate | 96% retention after 15,000 cycles |
| Power Density | Lower | Up to 17,000 W/kg |
| Electrolyte Stability | Limited | Enhanced |
| Safety | Flammability concerns | Improved stability |
Why is the PGCN Electrode Significant?
The enhanced performance originates from the specially engineered surface characteristics of the PGCN material.
Dual Functional Characteristics
1. Water-Repellent Surface
- Suppresses water-induced degradation
- Enhances long-term stability
- Reduces electrolyte decomposition risks
2. Electrolyte-Compatible Porous Structure
- Facilitates rapid electrolyte infiltration
- Enhances ion transport efficiency
- Improves electrochemical performance
The material possesses a micro- and mesoporous architecture, enabling:
- Faster ion movement
- High energy storage
- Improved power output
- Better electrochemical efficiency
Implications for Electric Vehicles (EVs)
The innovation can substantially improve EV performance through:
- Faster acceleration
- Higher energy storage
- Extended driving range
- Reduced charging time
- Improved power delivery during peak demand
The higher operating voltage also reduces the need for stacking multiple low-voltage cells, leading to:
- Compact module design
- Reduced system complexity
- Improved energy efficiency
- Lower manufacturing costs
Broader Applications
The technology has potential applications in:
- Grid-scale energy storage
- Solar power systems
- Portable electronics
- Hybrid vehicles
- Backup power systems
Its high durability and rapid charge-discharge capability make it suitable for renewable energy integration and next-generation mobility solutions.
Eco-Friendly Manufacturing Process
The PGCN electrodes are produced using an environmentally sustainable hydrothermal carbonization process.
Important Features of the Process
- Uses 1,2-propanediol as precursor
- Conducted at 300°C for 25 hours
- No harsh chemicals used
- No external gases required
- Yield exceeds 20%
- Scalable for industrial production
This makes the process:
- Environmentally friendly
- Cost-effective
- Suitable for large-scale manufacturing
Significance for India
The development supports:
- India’s clean energy transition
- Electric mobility expansion
- Aatma Nirbhar Bharat initiative
- Indigenous advanced energy-storage capability
The innovation can reduce dependence on imported energy-storage technologies while strengthening India’s position in emerging clean-tech sectors.
NECESSARY STATIC PART
International Advanced Research Centre for Powder Metallurgy and New Materials (ARCI)
- Autonomous institute under the Department of Science and Technology (DST)
- Focuses on:
- Advanced materials research
- Powder metallurgy
- Nanotechnology
- Energy materials
- Surface engineering
- Manufacturing technologies
Department of Science and Technology (DST)
- Functions under the Government of India
- Responsible for:
- Promotion of science and technology
- Scientific research funding
- Innovation and technological development
- Emerging technology missions
Publication Details
- Study published in the Chemical Engineering Journal (Elsevier)
- Supported under the Technical Research Centre (TRC) initiative of DST
Updated -26 Jan 2026 ; 11:38 AM | DST | News Source