ArticleNature communications2026
Enabling high-voltage aqueous dual-ion batteries capable of working at -40 °C in a low-concentration salt electrolyte.
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
Graphite positive electrode-based anion-intercalation aqueous dual-ion batteries using bis(trifluoromethanesulfonyl)imide anion intercalations show the potential because of the high discharge plateau (>1.4 V vs. the standard hydrogen electrode at 25 °C ± 2 °C) for anion chemistry. However, currently, the electrochemical performance of aqueous dual-ion batteries based on bis(trifluoromethanesulfonyl)imide anion intercalation can only be achieved in highly concentrated salt electrolytes. This dependence on high anion concentration to activate intercalation inevitably leads to high costs and prevents operation at low temperatures (e.g., < -20 °C). In this context, we explore a hydrogel electrolyte rich in dipole molecules, incorporating only 1 M lithium bis(trifluoromethanesulfonyl)imine and 2 M zinc chloride, with expanded electrochemical stability windows (>4.6 V at -40 °C) to activate bis(trifluoromethanesulfonyl)imide anion insertion into the graphite positive electrode through high-voltage scanning to 3.0 V. The assembled aqueous dual-ion batteries based on bis(trifluoromethanesulfonyl)imide anion intercalation demonstrate high discharge plateaus of 1.9 V at -20 °C and 1.7 V at -40 °C, along with a specific energy of 595 Wh kg
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