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Thermal-Induced Loose Solute Configuration Activates Organic Electrolyte for Zinc Metal Battery
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DOI：10.1002/adfm.77675.png)
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Abstract
En 中文
Zinc metal batteries face issues of low coulombic efficiency and persistent side reactions due to the active H2O in aqueous electrolytes. Organic electrolytes that can reduce side reactions and coulombic efficiency loss still suffer from sluggish Zn2+ transfer and difficult desolvation. We propose a thermal-induced loose solute configuration to activate rapid Zn2+ transfer in “Zn(OTf)2 + ACN” pure organic electrolyte. Zn metal batteries with the pure organic electrolyte realize stable and long-term cycling for over 5500 h at 5 mA cm−2 and 10 mAh cm−2. Moreover, a practical parameter of cumulative capacity reaches 7.5 Ah cm−2 at DOD > 90%. As an application demonstration, the pouch cells assembled with our organic electrolyte can be photo-charged by illumination and drive LEDs or other portable electronics in daily life. The organic electrolyte activated by thermal-induced loose solute configuration demonstrates long-cycle lifespan and application potential, offering a new choice for electrolytes in Zn metal batteries.
Keywords:
electrolyte thermal regulation
organic electrolyte
photo-charging battery
zinc metal battery
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19
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3.4W
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