Structural optimization of carbonized polymer dots for modulation of electrochemical performance of aqueous electrolytes
Year: 2025
Type: article
Abstract: Aqueous zinc ion batteries (AZIBs) are considered to be one of the most promising energy storage devices due to the advantages of high cost-effectiveness, safety, and environmental friendliness. However, they suffer from problems such as Zn dendrites growth and by-product generation. Carbonized polymer dots (CPDs) with polar groups as additive have been introduced to modulate the solvated structure of Zn2+ and reduce the water activity, promoting the uniform deposition of Zn and inhibiting the occurrence of side reactions. However, CPDs with different functional group contents from different precursor molar ratios variably affect the electrochemical performance of aqueous electrolytes. Therefore, in this work, we designed and synthesized CPDs with different molar ratios of the precursors (citric acid and urea) as electrolyte additives for AZIBs and explore the optimal molar ratios of the precursors. The Zn//Zn symmetrical cells using electrolytes with the optimal ratios CPDs achieve an extended cycle life over 615 h at 2 mA∙cm−2 and 1 mAh∙cm−2. This work offers great potential for future practical applications of CPDs.
Source: Journal of Molecular Science
Authors: Xinyao HUANG, Jiahui WANG, Guoduo YANG, Xin JI, Haizhu SUN
Institution: Northeast Normal University
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
Awards: G5929724909, G856814303
OpenAlex ID: W4413081090