Scientists at Harvard University have developed a new solid-state battery that could dramatically reduce electric vehicle (EV) charging times and costs. The battery, which can be charged in the time it takes to fill a petrol tank, retains 80% capacity after 6,000 cycles, equivalent to about 30 years of use.
The breakthrough addresses key barriers to EV adoption, including range anxiety and charging infrastructure. An Ipsos study last year found that along with cost, concerns about battery life and lack of charging stations deter many buyers. The Biden administration aims for half of new US vehicle sales to be electric by 2030, but EVs currently account for only 9%.
Solid-state batteries replace the liquid electrolyte in lithium-ion batteries with a non-flammable ceramic material, improving safety and performance. The Harvard team, led by Dr Xin Li, used a lithium metal anode with ten times the capacity of conventional graphite anodes, and a multilayer design to prevent dendrites—root-like structures that can cause short circuits or fires.
“If the consumer spends less money to buy an EV that will really drive global electrification,” Dr Li said. The battery also has high power density, making it suitable for applications beyond cars, such as electric planes. The researchers have licensed the technology through their startup, Adden Energy, and aim to scale it up for commercial use.
