May 8, 2025: Lead and lithium battery group Narada Power has launched what it described as an ultra-high-capacity solid-state battery to target the energy storage market.
The Chinese firm said on April 10 the 783Ah battery cell marked a breakthrough in its R&D, following the launch of its 20Ah all-solid-state battery in 2024 and later the 30Ah.
Narada said the move marked an advancement in energy density and safety performance through three core technological innovations — flexible biphasic oxide solid electrolyte, multi-layer heterogeneous composite structure design, and in-situ electrolyte film formation technology.
New material used significantly enhances flexibility and mechanical strength, effectively reducing the risk of electrolyte cracking, Narada claimed.
“The electrolyte features a high ionic conductivity of 10⁻³ S/cm, a wide electrochemical window, excellent air stability, and cost-effectiveness, laying a solid foundation for large-scale industrialization.”
The proprietary electrolyte film formation tech enables the electrolyte to infiltrate into the electrode and ‘self-assemble’ into a thin film, creating a flexible coating around the active particles to greatly reduce interfacial resistance.
The cell includes a lithium-conducting (LiCon) functional layer that enables fast ion transport, and a silicon-based interfacial layer that enhances contact between solid components.
Narada said the 783 Ah solid-state battery cell delivers more than 10,000 cycles, single-cell energy above 2.5 kWh, energy efficiency exceeding 95%, and volumetric energy density greater than 430 Wh/L.
To address the key technical challenges of long cycle life, the 783Ah battery uses a low lithium consumption artificial graphite technology, Narada said.
By controlling the interlayer spacing and orientation of the graphite, it reduces the volume changes caused by lithium de-intercalation, effectively enhancing the stability of the anode structure, with the full-charge negative electrode sheet expansion reduced to 18%.
Last March, Batteries International reported that Narada had won a bid to supply VRLA batteries with a contract value of Rmb330 million ($46 million) to China Tower.
