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Time of India
04-07-2025
- Science
- Time of India
India's rare-earth doping breakthrough hints at future of energy storage
New Delhi: Indian scientists have engineered a new energy storage material that demonstrated 118 per cent energy retention and 100 per cent coulombic efficiency , marking a major development in supercapacitor performance. The breakthrough has been achieved by researchers at the Centre for Nano and Soft Matter Sciences (CeNS), Bengaluru, in collaboration with Aligarh Muslim University. The research team, led by Dr Kavita Pandey at CeNS — an autonomous institute under the Department of Science and Technology — used silver niobate (AgNbO₃), a lead-free material, as the base and introduced lanthanum doping to improve performance. According to the findings, the addition of lanthanum, a rare-earth element, improved the electronic conductivity of the material and reduced particle size, increasing surface area available for energy storage. The doped material retained 118 per cent of its initial capacity after repeated use and achieved 100 per cent coulombic efficiency, with no loss of energy during charge-discharge cycles. A prototype asymmetric supercapacitor developed using the new material was able to power an LCD display. The research has been published in the Journal of Alloys and Compounds. 'This research demonstrates the potential of lanthanum doping as a method to tailor silver niobate for high-performance supercapacitors,' the research paper stated. The study highlights the role of rare-earth doping in improving the properties of silver niobate nanoparticles for electrochemical energy storage. The team said future research would explore doping strategies in other perovskite materials and focus on scaling up lanthanum-doped silver niobate for commercial use.
Time of India
03-07-2025
- Science
- Time of India
Indian scientists develop new material to supercharge green energy storage
BENGALURU: In a breakthrough with potentially far-reaching implications for clean energy, Indian scientists have engineered a next-generation material that significantly boosts the performance of supercapacitors — devices crucial for fast energy storage and delivery. Led by Dr Kavita Pandey at the Centre for Nano and Soft Matter Sciences (CeNS), Bengaluru, in collaboration with Aligarh Muslim University, the research focused on silver niobate (AgNbO₃), an eco-friendly, lead-free compound known for its favourable electrical properties. The team enhanced this material by doping it with lanthanum, a rare-earth element prized for its electronic characteristics. 'The lanthanum atoms shrank the size of the silver niobate nanoparticles, increasing the surface area available for energy storage and improving electrical conductivity. This allowed the supercapacitor to charge and discharge energy faster while also retaining significantly more of it,' the department of science and technology (DST) said. DST added that as a result, the new material demonstrated exceptional performance: it retained 118% of its initial energy capacity even after extensive use and achieved 100% coulombic efficiency — indicating virtually no energy loss during charge-discharge cycles. A working prototype of an asymmetric supercapacitor built using the lanthanum-doped silver niobate successfully powered an LCD display, offering a glimpse into its practical applications. 'Published in the Journal of Alloys and Compounds, the study underscores the role of rare-earth doping in designing high-efficiency energy materials. Researchers say the innovation can accelerate the development of compact, stable storage devices for portable electronics and large-scale renewable energy systems,' DST said. Future work will focus on extending this doping strategy to other perovskite materials and exploring commercial-scale production.
