Li Shilin, Zhou Taoyun, Cheng Yun, Li Xinyu
School of Information, Hunan University of Humanities, Science and Technology, Loudi 417000, China.
College of Physics and Electronic Information Engineering & Key Laboratory of Low-Dimensional Structural Physics and Application, Guilin University of Technology, Guilin 541004, China.
Materials (Basel). 2025 May 8;18(10):2166. doi: 10.3390/ma18102166.
With the rapid growth of renewable energy, the need for efficient and stable energy storage systems has become increasingly urgent. Aqueous zinc-ion batteries (AZIBs) can offer high safety, abundant zinc supply, and promising electrochemical properties. However, their performance is limited by poor electronic conductivity, slow Zn diffusion, and structural degradation of conventional cathode materials. To address these issues, an in situ polyaniline (PANI) intercalation strategy for vanadium oxide cathodes is introduced in this paper. The conductive PANI chains play three key roles: (1) expand and stabilize interlayer spacing, (2) enhance electronic conductivity, and (3) provide mechanical support to prevent structural collapse and zinc-dendrite formation. A flower-like PANI-VO hybrid is synthesized via synchronous oxidative polymerization, forming a hierarchical architecture without inert intercalants. The resulting electrode achieves a high specific capacity of 450 mAh·g at 0.1 A·g and retains 96.7% of its capacity after 300 cycles at 1 A·g, with excellent rate performance. These findings demonstrate that PANI intercalation enhances ion transport, electronic conductivity, and structural integrity, offering a promising design approach for next-generation AZIBs cathodes.
随着可再生能源的快速增长，对高效稳定的储能系统的需求变得越来越迫切。水系锌离子电池（AZIBs）具有高安全性、锌资源丰富以及良好的电化学性能。然而，其性能受到电子导电性差、锌扩散缓慢以及传统阴极材料结构退化的限制。为了解决这些问题，本文介绍了一种用于氧化钒阴极的原位聚苯胺（PANI）插层策略。导电的聚苯胺链发挥三个关键作用：（1）扩大并稳定层间距；（2）提高电子导电性；（3）提供机械支撑以防止结构坍塌和锌枝晶形成。通过同步氧化聚合合成了一种花状聚苯胺-氧化钒（PANI-VO）复合材料，形成了一种无惰性插层剂的分级结构。所得电极在0.1 A·g下实现了450 mAh·g的高比容量，在1 A·g下循环300次后仍保留其容量的96.7%，具有优异的倍率性能。这些研究结果表明，聚苯胺插层增强了离子传输、电子导电性和结构完整性，为下一代水系锌离子电池阴极提供了一种有前景的设计方法。
