Sr-V-O Based Electrode Material for Strontium Batteries and Manufacturing Method Thereof

Sr-V-O Electrode Material for Reversible Strontium Ion Intercalation Synthesized via Osmotic Ion Exchange

This technology synthesizes a novel Sr-V-O electrode material capable of reversible strontium ion intercalation by immersing a NaV3O8 (NVO) precursor in an aqueous strontium salt solution, utilizing osmotic pressure to replace sodium ions with strontium ions.

Conventional lithium and sodium secondary batteries face physical and chemical limitations related to resource scarcity and ion volume. While strontium secondary batteries have gained attention as next-generation energy storage, a suitable electrode material capable of reversible strontium ion intercalation had not yet been developed.

This technology involves coating a current collector with NaV3O8 powder and immersing it in an aqueous Sr salt solution, where osmotic pressure facilitates the exchange of Na ions for Sr ions to produce an electrode material with the composition Sr1+xV6O16·y(H2O) for use in strontium ion batteries. Its key advantage is a streamlined process that completes the electrode simply through immersion, without the need for high-temperature synthesis or applied voltage, making it applicable to strontium ion battery electrodes, aqueous multivalent ion battery prototypes, and low-cost, large-capacity storage devices.

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Key Features:

• Uniformly coating NaV3O8 powder onto a current collector and preparing a separate aqueous Sr salt solution
• Immersing the NaV3O8-coated current collector in the aqueous Sr salt solution, allowing hydrated Sr particles to replace Na in the NVO via osmotic pressure
• Synthesizing the Sr1+xV6O16·y(H2O) strontium electrode material through the substitution reaction and washing the current collector surface with water
• An aqueous solution containing one or more Sr salts selected from Sr(NO3)2, Sr(ClO4)2, Sr(OOCCH3)2, and SrCl2

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