Volt Carbon Technologies announced the issuance of a second US patent supporting its dry-separation graphite platform, along with updated technical results from its lithium-metal battery development program.
The work is being conducted at the company’s facility in Guelph, Ontario, reinforcing the North American relevance of its materials and battery research.
The newly issued US patent covers Volt Carbon’s aerodynamic air classification technology, which underpins its dry graphite purification process. This approach is intended to support scalable, low-water graphite processing for battery anode materials, a key component of lithium-based batteries used in electric vehicles (EVs).
The expansion of the company’s U.S. patent portfolio strengthens its position within the North American battery materials supply chain.
In parallel, Volt Carbon reported continued progress in lithium-metal battery development, including extended cycle-life testing, high-rate discharge performance, and improved low-temperature operation. Recent evaluations demonstrate stable long-duration cycling and strong discharge capability under high power demand, supporting the potential suitability of the chemistry for EV platforms that require both durability and performance.
Low-temperature testing showed meaningful improvements compared with earlier results, with lithium-metal cells maintaining operation in temperature ranges where conventional lithium-ion batteries typically experience significant performance degradation. These characteristics are relevant for EV applications in cold climates, including northern North America, where winter performance remains a key engineering challenge.
Volt Carbon also released new test results related to expandable graphite produced using its dry separation process. The material demonstrated rapid expansion under high heat, indicating potential relevance for EV battery thermal management and fire mitigation applications.
The patent issuance and technical updates highlight Volt Carbon’s ongoing efforts to develop battery materials and lithium-metal cell technologies that address energy density, durability, cold-weather performance, and safety considerations for advanced EV systems.
Filed Under: Batteries, Technology News