The new technique, which involves injecting a lithium-ion carrier molecule into old batteries, has been found to extend their life beyond 12,000 discharge cycles.
The technique was developed by a team at Fudan University in Shanghai, and published in the journal Nature.
This could have huge implications across several sectors, including electric vehicles (EVs), smartphones and energy-storage facilities. This breakthrough is not only highly effective but also remarkably low-cost.
Such technology would prove revolutionary for batteries typically lasting between 1,000 and 1,500 cycles (around six to eight years of use).
For an EV that charges twice a day, this means the battery could last up to 18 years. In comparison, current EV batteries usually lose 30 per cent of their performance in just 2.7 years with the same charging routine.
A lithium-ion battery consists of a cathode, anode, and active lithium ions in between. These batteries are key for many modern technologies, from smartphones to electric vehicles. However, as these batteries age, they often become less efficient – a process that cold weather accelerates. A typical battery is retired when it loses too many ions.
Gao Yue from Fudan University said that the new technology relies on a lithium carrier molecule, which can be injected into old batteries to replenish lost lithium ions. Likened to precision surgery in human beings, this new method could extend battery life and offer important benefits for reducing battery waste and environmental pollution.
“A commercially used lithium iron phosphate battery, after undergoing the treatment, retained its initial health after 12,000 charge cycles, compared with the usual lifespan of 2,000 cycles,” Gao told broadcaster CCTV.
“The new solution not only delays battery retirement but also slashes resource waste and pollution,” said Gao . “Whether extending the battery lifespan or preventing large-scale waste and environmental pollution, this ‘precision treatment’ offers a viable technical solution,” said a statement by Fudan University.
Sources:
- Interesting Engineering, Feb 15, 2025. https://interestingengineering.com/…/reverse-aging…
- South China Morning Post, Feb 14, 2025. https://www.scmp.com/…/chinese-scientists-develop…
China Environment News 