Key Takeaways:
A pilot project in China’s Jiangsu province has deployed a new aqueous metal battery with a lifespan at least five times longer than conventional lithium-ion cells, challenging the incumbent technology’s dominance in the commercial and industrial energy storage market.
The fourth-generation aqueous metal battery (AMC) from EnerVenue demonstrates superior durability, stability, and safety, according to a joint announcement from the company and partner HK & CHINA GAS (00003.HK).
Operated by HK & CHINA GAS subsidiary TG SMART ENERGY (01083.HK), the 150 kilowatt-hour system uses 50 AMC batteries to support an electric bus charging station. The system can operate in extreme temperatures from minus 20 to 60 degrees Celsius without the need for active cooling, a major cost and failure point for lithium-ion systems.
As the first global application of this technology, the project provides a crucial test case for a non-flammable, non-toxic alternative to lithium-ion. With utilities and renewable energy developers seeking safer, longer-lasting storage to support grid stability, a successful pilot could accelerate the adoption of new battery chemistries and erode lithium's market share in the stationary storage sector, which is projected to grow exponentially this decade.
The deployment directly addresses the primary drawbacks of lithium-ion batteries in large-scale applications. While lithium-ion cells have a typical design lifespan of 6,000 to 8,000 charge-discharge cycles, their performance can degrade rapidly under the high-frequency use required by grid services. They also carry the risk of thermal runaway—a dangerous chain reaction that can lead to fires, a concern that has led to costly safety and cooling systems for large installations.
EnerVenue’s aqueous metal battery, by contrast, contains no lithium or toxic electrolytes and is inherently non-flammable. The company claims it can endure over 30,000 cycles without degradation, offering a significant advantage in total cost of ownership. The pilot project in Changzhou will see the system perform 2-to-4-hour charging and discharging cycles daily, integrating with an on-site solar power system to reduce energy costs for the bus depot.
The project comes as the energy storage market actively seeks alternatives to lithium-ion, especially for stationary applications where energy density is less critical than safety, durability, and cost. This trend is visible in other major projects, such as the 500 MWh sodium-ion battery system planned for California's Mojave Desert, which also aims to eliminate fire risk and the need for expensive cooling in harsh environments.
By using earth-abundant materials, technologies like aqueous metal and sodium-ion batteries can also mitigate the supply chain and cost volatility associated with lithium and cobalt. For HK & CHINA GAS, a major energy distributor, the technology offers a path to build a portfolio of high-performance, low-maintenance energy storage assets. A successful outcome in Jiangsu could pave the way for broader deployment across its commercial and industrial customer base, positioning the company as a key player in China's energy transition.
This article is for informational purposes only and does not constitute investment advice.
