HZDR Researchers Identify Capacity Loss Causes in High-Temperature Sodium-Zinc Batteries
Researchers at Helmholtz-Zentrum Dresden-Rossendorf have used operando X-ray imaging to uncover aging processes in sodium-zinc molten-salt batteries, which operate at around 600 C. These batteries, promising for stationary energy storage due to low-cost materials, have struggled with stability and persistent capacity loss despite their operational advantages.
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Helmholtz-Zentrum Dresden-Rossendorf (HZDR) researchers have utilized operando X-ray imaging to investigate sodium-zinc molten-salt batteries operating at approximately 600 C. This study marks the first direct observation of aging processes in these batteries.
Although the technology is promising for stationary energy storage due to the low cost and abundance of materials, it has not achieved the necessary stability for deployment. The high operating temperature allows for quick transport of liquid metals within the cell, but also complicates control, leading to significant performance loss during operation. HZDR's Norbert Weber coordinates the EU project SOLSTICE, which explores various sodium-zinc storage concepts.
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