General Motors is expanding its battery ambitions beyond electric vehicles, announcing a major push into sodium-ion battery technology for grid-scale energy storage systems (ESS). The initiative, developed in partnership with Peak Energy and supported by GM Ventures, aims to address growing electricity demand and the increasing energy needs of data centers and utilities.
In a statement published by GM, Kurt Kelty, Vice President of Battery & Sustainability, described sodium-ion batteries as a promising solution for delivering reliable, affordable, and long-duration energy storage. Unlike electric vehicles, where energy density and charging speed are critical, grid operators prioritize durability, safety, and cost efficiency.
Sodium-ion batteries operate similarly to lithium-ion batteries by storing and releasing energy through ion movement. However, sodium’s unique characteristics enable batteries that can function across a broader temperature range and endure more charging cycles. These advantages could allow future energy storage systems to operate without active cooling, reducing maintenance requirements, energy losses, noise, and overall system complexity.
GM believes these benefits make sodium-ion technology particularly attractive for large-scale stationary energy storage applications. The company highlighted Peak Energy’s existing sodium-ion storage platform as an example of how the chemistry can lower operational costs while improving reliability.
The automaker also sees significant long-term potential in sodium-ion technology due to the abundance of sodium, one of the most widely available elements on Earth. This could help create more resilient and accessible battery supply chains while reducing dependence on materials facing supply constraints.
According to GM, sodium-ion batteries remain in the early stages of development, leaving substantial room for future improvements. The company expects advances in energy density could eventually enable sodium-ion cells to compete with or even surpass mature battery chemistries such as lithium iron phosphate (LFP).
To accelerate innovation, GM will begin prototyping sodium-ion battery cells this year at its Wallace Battery Cell Innovation Center in Warren, Michigan. The project builds on the company’s extensive battery research and complements its work on advanced EV battery technologies.
Alongside long-term investments, GM is also pursuing immediate energy storage opportunities. Through its Ultium Cells joint venture with LG Energy Solution, the company plans to begin producing LFP batteries for commercial energy storage applications. GM is additionally working with Redwood Materials to deploy approximately 10,000 repurposed EV batteries into energy infrastructure projects, including powering AI-focused data centers.
Looking ahead, GM intends to deploy second-life battery packs at one of its Michigan manufacturing plants, where the system is expected to provide 7.2 MWh of dispatchable energy and generate more than $3 million in electricity savings over its operational lifetime.
As demand for reliable energy storage continues to rise, GM believes sodium-ion technology could play a pivotal role in building a more resilient, affordable, and flexible electricity grid for the future.
