General Motors announced a partnership with Peak Energy to develop sodium-ion batteries aimed at stabilizing electrical grids strained by surging AI data center demand. Sodium-ion chemistry offers a lower-cost alternative to lithium-ion for stationary grid storage, with fewer supply chain dependencies. GM did not disclose the financial terms of the deal or a specific deployment timeline. The partnership positions GM in a market that grid operators and utilities are watching closely as data center load growth strains transmission infrastructure.