Multifunctional Sodium Gluconate Electrolyte Additive Enabling Highly Reversible Zn Anodes

ZHAO Kang ¹ZHAO Jianan ²YU Meng ³LIU Fangming ³DONG Yang ³WANG Shiwen ²CHENG Fangyi³

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作者信息

1. College of Chemistry,Nankai University,Tianjin 300071,P.R.China;College of New Energy,Zhengzhou University of Light Industry,Zhengzhou 450002,P.R.China
2. College of New Energy,Zhengzhou University of Light Industry,Zhengzhou 450002,P.R.China
3. College of Chemistry,Nankai University,Tianjin 300071,P.R.China
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Abstract

Sodium gluconate(SG)is reported as an electrolyte additive for rechargeable aqueous zinc batteries.The SG addition is proposed to modulate the nucleation overpotential and plating behaviors of Zn by forming a shielding buffer layer because of the adsorption priority and large steric hindrance effect,which contributes to limited rampant Zn2+diffusion and mitigated hydrogen evolution and corrosion.With the introduction of 30 mmol/L SG in 2 mol/L ZnS04 electrolyte,the Zn anode harvests a reversible cycling of 1200 h at 5 mA/cm2 and a high average Coulombic efficiency of Zn plating/stripping(99.6％).Full cells coupling Zn anode with V2O5·1.6H2O or polyaniline cathode far surpass the SG additive-free batteries in terms of cycle stability and rate capability.This work provides an inspiration for design of a high-effective and low-cost electrolyte additive towards Zn-based energy storage devices.

Key words

Electrolyte additive/Zn anode/Sodium gluconate/Adsorption/Zn dendrite

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基金项目

National Natural Science Foundation of China(21925503)

National Natural Science Foundation of China(22309167)

PhD Research Fund Project of Zhengzhou University of Light Industry,China(2022BSJJZK10)

Science and Technology Project of Henan Province,China(242102241045)

Natural Science Foundation of Henan Province,China(242300420206)

Specially-Appointed Professor Project of Zhengzhou University of Light Industry,China.μ()

出版年

2024

高等学校化学研究(英文版)

吉林大学

高等学校化学研究(英文版)

CSTPCD

影响因子：0.871

ISSN：1005-9040

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