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Home NEWS Science News Chemistry

Enhancing Zinc Anodes: A Durable Artificial SEI Film with Zincophilic and Hydrophobic Bifunctional PFA-COOH-CNT

Bioengineer by Bioengineer
September 6, 2025
in Chemistry
Reading Time: 4 mins read
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The excellent cycling performances of Zn anode by using zincophilic and hydrophobic PFA-COOH-CNT artificial SEI film
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In a groundbreaking development within the field of energy storage, a collaborative effort between Professor Gu Xingxing’s team at Chongqing Technology and Business University and Professor Yanglong Hou’s team from Sun Yat-sen University has led to the creation of a novel artificial solid electrolyte interphase (SEI) membrane. This innovative membrane, characterized by its “zincophilic-hydrophobic” dual-functionality, is anticipated to revolutionize aqueous zinc-ion batteries (AZIBs) and significantly enhance the stability and performance of zinc anodes.

The research introduces a unique PFA-COOH-CNT artificial SEI film synthesized using biomass-derived furfuryl alcohol (FA) in combination with carboxyl functionalized carbon nanotubes (COOH-CNT). The significance of this artificial SEI film lies in its unique properties that promote the uniform deposition of zinc ions while concurrently inhibiting the detrimental side reactions that typically plague zinc anodes. This innovation addresses crucial challenges such as zinc dendrite growth and the hydrogen evolution reaction (HER), which are commonly responsible for the cycles’ limited lifespan in current systems.

The PFA-COOH-CNT membrane achieves noteworthy performance metrics, including an ultra-long cycle life of 2200 hours at current densities of 1 mA‧cm−2 and specific capacities of 1 mAh‧cm−2. These metrics far exceed those observed in conventional zinc||zinc symmetric batteries, which typically demonstrate a cycle stability of only 418 hours under similar conditions. The ability of this artificial SEI film to create a stable and efficient operating environment for zinc anodes marks a significant step forward in battery technology.

As the research suggests, the successful incorporation of the PFA-COOH-CNT SEI film leads to a more uniform deposition of zinc ions during the electrochemical processes involved in plating and stripping. This uniformity is crucial as it minimizes the formation of zinc dendrites, mitigating one of the principal causes of battery failure. Furthermore, by effectively hindering the direct contact between the aqueous electrolyte and the zinc anode through hydrophobic properties, the artificial SEI film reduces the likelihood of HER occurrences. This dual functionality is key in enhancing the overall efficiency and longevity of the battery.

In a broader context, the achievement of rechargeable full cells using the PFA-COOH-CNT technology indicates impressive reversible capacities. For instance, the PFA-COOH-CNT@Zn||V2O5 full cell exhibits remarkable electrochemical performances, showcasing a reversible capacity of 150.2 mAh‧g−1 at a high current rate of 1 A‧g−1 after 400 cycles. Such results represent a critical advancement in the feasibility of using zinc-based batteries for sustainable energy storage solutions.

This innovation stems from detailed research into the properties of zinc-ion deposition. Professor Gu emphasized the impactful role that both zincophilic and hydrophobic characteristics play in enhancing anode performance. The traditional barriers faced by aqueous zinc-ion batteries are largely attributed to uneven electric field distributions caused by dendrite formation, the phenomenon known as “dead zinc,” and the irreversible corrosion catalyzed by HER. By expertly leveraging the properties of the newly designed SEI film, the team effectively stabilizes the zinc anode, paving the way for enhanced cyclic performance.

The creation of hybrid artificial SEI membranes has emerged as a superior alternative to conventional designs, which often fall short during the repetitive charging and discharging cycles of batteries. The inorganic layers can detach under continuous cycling, whereas the organic materials lack sufficient zincophilic properties. In contrast, the innovative combination of FA and COOH-CNT in the newly designed membrane provides both structural robustness and excellent functional performance, drastically reducing the chances of failure.

On a molecular level, the process of synthesizing the artificial SEI involves the esterification of FA and COOH-CNT under acidic conditions, followed by heating. This reaction leads to the formation of a three-dimensional porous framework that houses a plethora of zincophilic groups. Additionally, the self-polymerization of FA into polyfurfuryl alcohol results in a compact and homogenous film that adheres tenaciously to the zinc surface. This critical amalgamation of functionalities boosts the zinc anode’s performance significantly.

The implications of this research extend far beyond zinc-ion batteries, revealing opportunities for application in various energy storage systems. The simple and cost-effective methodology described offers a path toward the development of sustainable battery technologies that could better meet the world’s growing energy demands. Scalability is a crucial aspect of this technology, and its straightforward application using readily available raw materials emphasizes its potential for future development in the field.

Supporting the findings, researchers from the Technical Institute of Physics and Chemistry in Beijing contributed significantly to the project, highlighting a collaborative effort that broadens the scope of impact. Through substantial funding from institutions such as the National Natural Science Foundation of China and other academic grants, this research stands as a testament to the importance of interdisciplinary cooperation in the field of renewable energy.

The future of energy storage appears promising with such advancements in technology and material science. The dual-functionality of PFA-COOH-CNT membranes not only paves the way for longer-lasting battery systems but also demonstrates a commitment to tackling global energy challenges with innovative solutions. The hope is that these developments will lead to greater efficiency, sustainability, and reliability in energy storage solutions globally.

This innovative pursuit towards zinc anode stabilization signals a critical milestone in advancing not only battery technologies but also in promoting a deeper understanding of electrochemical processes. Researchers expect that the enhanced stability and performance could lead to exciting advancements in various applications, including consumer electronics, electric vehicles, and renewable energy storage solutions, thereby ushering in a new era in battery technology.

The outcome of this research emphasizes the value of strategic innovation in energy storage solutions, showcasing how scientific inquiry can lead to transformative developments in technology. The future not only looks brighter for zinc-ion technologies but also reaffirms the importance of continued research and collaboration in overcoming the challenges posed by energy storage applications.

Subject of Research: Development of dual-function artificial SEI membrane for zinc anodes
Article Title: Zincophilic and hydrophobic bifunctional PFA-COOH-CNT artificial SEI film for highly stable Zn anode
News Publication Date: 8-Jan-2025
Web References: Nano Research
References: National Natural Science Foundation of China
Image Credits: Nano Research, Chongqing Technology and Business University

Keywords

Energy storage, zinc-ion batteries, solid electrolyte interphase, artificial membranes, battery technology, charge cycles, dendrite inhibition, electrochemical performance, sustainability, hybrid materials, nanoscale innovation, biomass materials.

Tags: advanced energy storage solutionsaqueous zinc-ion batteriesartificial solid electrolyte interphasebattery cycle life enhancementbiomass-derived materials in energy storagecarbon nanotubes in batterieselectrochemical performance metricshydrogen evolution reaction inhibitionPFA-COOH-CNT synthesiszinc anodes technologyzinc dendrite growth preventionzincophilic hydrophobic materials

Tags: aqueous zinc-ion batteriesartificial solid electrolyte interphasebiomass-derived materials in energy storagezinc dendrite growth preventionzincophilic hydrophobic materials
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