The Baochi Storage Station in Yunnan integrates lithium and sodium-ion technologies at scale, a global first, aiming to stabilize renewable energy and cut costs as China accelerates its energy transit...

Solid-state batteries unlock possibilities for using energy-dense anodes such as lithium metal while addressing key degradation challenges. However, unresolved issues at the material and cell levels h...

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Christopher L. Eisgruber of Princeton University talks about the administration’s move to freeze billions of dollars in funding to higher education institutions.

University President Christopher Eisgruber ’83 signaled that Princeton would not make concessions to the federal government after news broke that the Trump administration had suspended dozens of the U...

In a series of papers, a Princeton research group has revealed fundamental insights into anode-free solid-state batteries, paving the way for efforts to improve their manufacturability.

Lithium-reservoir-free solid-state batteries can fail due to electrical shorting as a result of fracture and lithium metal filament formation. Mechanical stress at the solid electrolyte surface can in...

Three engineering faculty members — Kelsey Hatzell, Aleksandra Korolova and Olga Russakovsky — have been awarded the Presidential Early Career Award for

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The ME professor was named a 2024 National Academy of Inventors Fellow, the highest professional distinction awarded solely to inventors.

BYD has launched what it claimed is the 'world's first high-performance' sodium-ion BESS product, using its Long Blade Battery cell.

Solid-state batteries (SSBs) with silicon anodes could enable improved safety and energy density compared to lithium-ion batteries. However, degradation arising from the massive volumetric changes of silicon anodes during cycling is not well understood in solid-state systems. Here, we use operando X-ray computed microtomography to reveal micro- to macro-scale chemo-mechanical degradation processes of silicon anodes in SSBs. Mud-type channel cracks driven by biaxial tensile stress form across the electrode during delithiation. We also find detrimental cracks at the silicon/solid electrolyte interface that form due to local reaction competition between neighboring domains of different sizes. Continuum phase-field damage modeling quantifies stress-driven channel cracking and shows that the lithiated silicon stress state is critical for determining the extent of interfacial fracture. This work reveals the mechanisms that govern SSBs compared to conventional lithium-ion batteries and provides guidelines for engineering chemo-mechanically resilient electrodes for high-energy batteries.