Enovix, a Fremont, Calif., battery company, claimed this week that its silicon anode can outdo rival pure lithium-metal technology, which has gained favor among major automakers searching for the next generation of batteries to power electric vehicles.
The company’s chief technology officer, Ashok Lahiri, said Enovix’s silicon-based battery achieves energy density of 900 watt-hours per liter, an extremely high performance that, if borne out, would substantially increase EV driving range. Volkswagen-backed QuantumScape, a leading lithium-metal anode startup, also says its batteries achieve 900 Wh/L, but has projected that claim based on the performance of a far smaller battery. Today’s lithium-ion EV batteries have energy densities of around 400 Wh/L at the pack level.
In data provided first to The Electric, Lahiri also claimed that a new feature of Enovix’s silicon anode will make its batteries substantially safer than solid-state lithium-metal batteries.
Enovix’s assertions are based on a battery made for a smartphone, and QuantumScape grounds its claims on an even smaller model, so there is no certainty they will end up in commercial products. But the energy densities they are describing could boost current EV driving range by 50% and lower ...