CFX Coating Enables Highly Reversible Zn Metal Anode

IF 5.3 3区工程技术 Q2 ENERGY & FUELS

Energy & Fuels Pub Date : 2025-09-22 DOI:10.1021/acs.energyfuels.5c03134

Siyao Song, , , Jianlin Chen, , , Anli Wang, , , Mengyuan Shen, , , Fei Shen*, , , Qiang Lu, , , Jingjin Xu, , , Zihan Lin, , and , Xiaogang Han*,

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Abstract

Rechargeable aqueous Zn-ion batteries (AZIBs) have garnered significant interest owing to their safety, economic advantages, and environmental protection. However, Zn dendrite growth and undesirable side reactions significantly limit the practical use of ZIBs. Herein, a fluorinated graphite (CF_x) and polyvinylidene fluoride (PVDF) composite interface layer was introduced to enhance the cycling stability of the zinc anode. By coating the Zn anode with a hydrophobic CF_x-PVDF composite interface layer, the direct contact between the Zn anode and H₂O molecules was prevented, thus inhibiting dendrite growth and side reactions concurrently. Thus, the growth of Zn dendrites was effectively suppressed with restricted Zn²⁺ 2D diffusion and limited side reactions. In addition, the symmetric cells achieved stable cycles and a lifespan exceeding 1400 h at 5 mA cm^–2 and 1 mA h cm^–2, significantly outperforming the performance of the cells with a bare Zn anode. The capacity retention rate of CF_x-PVDF@Zn || NH₄V₄O₁₀ was 71.8% after 1000 cycles, which showed an excellent cycle ability.

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CFX涂层实现高度可逆的锌金属阳极

可充电水性锌离子电池（azib）因其安全性、经济性和环保性而受到广泛关注。然而，锌枝晶的生长和不良副反应极大地限制了ZIBs的实际应用。为了提高锌阳极的循环稳定性，引入了氟化石墨（CFx）和聚偏氟乙烯（PVDF）复合界面层。通过在Zn阳极表面涂覆疏水性CFx-PVDF复合界面层，可以防止Zn阳极与H2O分子的直接接触，从而抑制枝晶生长和副反应的同时发生。因此，通过限制Zn2+的2D扩散和限制副反应，有效地抑制了Zn枝晶的生长。此外，对称电池在5 mA cm-2和1 mA h cm-2下实现了稳定的循环和超过1400小时的寿命，显著优于裸锌阳极电池的性能。循环1000次后，CFx-PVDF@Zn || NH4V4O10的容量保持率为71.8%，表现出良好的循环能力。

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来源期刊

Energy & Fuels 工程技术-工程：化工

CiteScore

9.20

自引率

13.20%

发文量

1101

审稿时长

2.1 months

期刊介绍： Energy & Fuels publishes reports of research in the technical area defined by the intersection of the disciplines of chemistry and chemical engineering and the application domain of non-nuclear energy and fuels. This includes research directed at the formation of, exploration for, and production of fossil fuels and biomass; the properties and structure or molecular composition of both raw fuels and refined products; the chemistry involved in the processing and utilization of fuels; fuel cells and their applications; and the analytical and instrumental techniques used in investigations of the foregoing areas.