原位构筑聚糠醇SEI膜用于稳定锌负极的机制研究  

In-Situ Construction of Polyfurfuryl Alcohol SEI Film for Stabilizing Zinc Anode

作　　者：匡玲瑶 乔双 王倩 王星敏 代金航 古兴兴 Kuang Lingyao;Qiao Shuang;Wang Qian;Wang Xingmin;Dai Jinhang;Gu Xingxing(School of Environment and Resources,Chongqing Technology and Business University,Chongqing 400065,China;Youke Publishing Co.,Ltd.,China GRINM Group Co.,Ltd.,Beijing 100088,China)

机构地区：[1]重庆工商大学环境与资源学院,重庆400065 [2]中国有研科技集团有限公司有科期刊出版(北京)有限公司,北京100088

出　　处：《稀有金属》2024年第7期965-975,共11页Chinese Journal of Rare Metals

基　　金：国家自然科学基金青年基金项目(51902036);重庆市自然科学基金面上项目(CSTB2022NSCQ-MSX0828);重庆市教委科学技术研究项目重点项目(KJZD-K202300802);重庆市留学人员回国创业创新支持计划项目(CX2021046)资助。

摘　　要：水系锌离子电池(AZIBs)由于锌金属含量丰富,安全性更高,被认为是锂离子电池很有潜能的替代品。但由于锌负极的无宿主性以及不均匀的剥离/电镀,且在水系电解液中锌表面存在腐蚀、钝化以及析氢等问题显著影响了水系锌电池的库伦效率以及循环稳定性,这也阻碍了AZIBs的进一步推广应用。通过催化糠醇在锌箔表面原位聚合形成一层致密平滑的聚糠醇(PFA)固液界面膜(SEI膜),从而阻碍锌负极被腐蚀以及抑制锌枝晶生长,有效地提升了锌负极的循环稳定性。在最佳SEI膜厚度(20μm)下,Zn@PFA负极在1 m A·cm^(-2)的电流密度下能稳定循环553 h,明显高于纯锌负极的76 h,此外,Zn@PFA与V_2O_5正极组成的全电池在1.0 A·g^(-1)电流密度循环200圈后,可逆容量仍高达100 m Ah·g^(-1),也优于裸锌负极与V_2O_5正极组成的全电池。为实现锌负极稳定循环提供了一种简便且可大规模化操作的策略。Due to its advantages such as light weight,high energy density and long cycle life,lithium-ion batteries were successfully commercialized in the early 1990s and became the hottest and most widely studied battery.However,there were still many problems in lithium-ion batteries:(1)The electrolytes used in lithium0ion batteries were easy flammable and thus causing low safety;(2)Most organic electrolytes were easily oxidized and sensitive to water when exposed to air,and had strict requirements for environmental conditions;(3)Lithium metal reserves were very low.Therefore,low-cost and high-safety aqueous rechargeable batteries had become one of the most potential replacements for lithium-ion batteries.Aqueous Zn-ion batteries(AZIBs)had the advantages of non-toxicity,safety and environmental protections,and its energy density(5851 mAh·g^(-1))was comparable to lithium-ion batteries,and it had a high theoretical capacity(820 mAh·g^(-1))and a low electrochemical potential(-0.76 V(vs.SHE)),which made the researches of AZIBs very attractive,becoming one of the most studied aqueous batteries in recent years.However,zinc anode still faced many problems,among which the corrosion of zinc anode was a major problem in the application of AZIBs.Since the standard reduction potential of Zn/ZnO was-1.26 V and the standard reduction potential of hydrogen evolution was-0.83 V,the hydrogen evolution reaction was more likely to thermodynamically occur.Therefore,it was easy to accumulate a large amount of OH-on the zinc surface and react with the zinc surface to generate zinc oxide or zincate by-products,consuming the electrolyte and zinc anode,and reducing the capacity and utilization rate of active substances.To address these issues,researchers around the world had come up with a variety of strategies.Among them,in the surface coating protection strategy,the artificially constructed solid-liquid interface film(SEI film)on the surface of the zinc negative electrode could effectively isolate the contact between the water in the electrol

关 键 词：锌负极 防腐蚀 锌枝晶 聚糠醇(PFA) 人工固液界面膜(SEI膜) 

分 类 号：TM912[电气工程—电力电子与电力传动]