A Fast and Highly Stable Aqueous Calcium-Ion Battery for Sustainable Energy Storage.

ABSTRACT: Aqueous alkali-ion batteries are gaining traction as a low-cost, sustainable alternative to conventional organic lithium-ion batteries. However, the rapid degradation of commonly used electrode materials, such as Prussian Blue Analogs and carbonyl-based organic compounds, continues to challenge the economic viability of these devices. While stability issues can be addressed by employing highly concentrated water-in-salt electrolytes, this approach often requires expensive and, in many cases, fluorinated salts. Here, we show that replacing monovalent K⁺ ions with divalent Ca²⁺ ions in the electrolyte significantly enhances the stability of both a copper hexacyanoferrate cathode and a polyimide anode. These findings have direct implications for developing an optimized a

SUBMITTER: Streng RL 

PROVIDER: S-EPMC11912106 | biostudies-literature | 2025 Mar

REPOSITORIES: biostudies-literature