ArticleNature communications2026
Grain boundary engineered aluminum current collector for energy-dense initially anode-free sodium metal batteries.
Article in Nature communications, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The initially anode-free sodium metal batteries represent promising candidates for high specific energy and safe battery systems, relying solely on cathodic sodium reservoirs. However, the irreversible accumulation of electrochemically inactive "dead" Na and unstable solid electrolyte interphases fundamentally constrains cyclability through rapid active Na depletion. Here, we utilize a grain-boundary gallium-rich polycrystalline aluminum current collector to trigger controlled dissolution of aluminum ions. The dissolved aluminum ions modify the local coordination environment of the electrolyte, thereby perturbing the solvation equilibrium of sodium ions and facilitating sodium ions migration toward the positive electrode for charge compensation. The gallium-rich aluminum current collector enables stable Na plating/stripping for over 2500 cycles. The pouch cell with Na
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