GM is doing most of the development work on its second-generation Ultium cells internally at its Chemical and Materials Systems Lab, located at the Global Technical Center in Warren, Michigan. This facility features a fabrication line with polymer mixing, slurries, a coating machine and a cell assembly room. (Photo by Steve Fecht for General Motors)

GM is doing most of the development work on its second-generation Ultium cells internally at its Chemical and Materials Systems Lab, located at the Global Technical Center in Warren, Michigan. This facility features a fabrication line with polymer mixing, slurries, a coating machine and a cell assembly room. (Photo by Steve Fecht for General Motors)