Duan Wenyuan, Chen Shenghua, Li Yanlin, Chen Shaoquan, Zhao Yuzhen
Xi'an Key Laboratory of Advanced Photo-electronics Materials and Energy Conversion Device, Xijing University Xi'an 710123 China
School of Materials Science and Engineering, Xi'an University of Architecture & Technology Xi'an 710055 China
RSC Adv. 2023 Nov 1;13(45):32023-32027. doi: 10.1039/d3ra05754b. eCollection 2023 Oct 26.
The energy crisis is a the worldwide problem which needs humans to solve immediately. To solve this problem, it is necessary to develop energy storage batteries. It is worth mentioning the aqueous rechargeable zinc ion batteries (ARZBs) which have some advantages, such as low cost, good safety and no need for an organic electrolyte as in the traditional lithium-ion batteries. However, it is still a challenge to find suitable and reliable electrode materials. In this work, as-prepared HVO nanorods and MXene composites are used as cathode materials in ARZBs which were designed well using a hydrothermal method after optimizing the reaction time. The results showed that HVO/MXene ARZBs could provide a good transport path for zinc ions, which were based on special 1D HVO nanorods and 2D multi-layered MXene materials, which exhibited an outstanding initial specific discharge capacity of 373 mA h g at 200 mA g, good rate capability and a long lifecycle with only 15.8% capacity decay at 500 mA g after 5000 cycles. The HVO/MXene composites with a good electrochemical performance bring insight into their promising applications for energy storage batteries. They provided enhanced rate performance and excellent cycling stability, which was ascribed to the multi-step and multi-mode zinc ion insertion/extraction process. This was confirmed by the use of the 1D/2D integrated structure of the HVO/MXene composites, which was conductive to zinc ion diffusion.
能源危机是一个需要人类立即解决的全球性问题。为了解决这个问题，开发储能电池是必要的。值得一提的是水系可充电锌离子电池（ARZBs），它具有一些优点，如成本低、安全性好，且不像传统锂离子电池那样需要有机电解质。然而，找到合适且可靠的电极材料仍然是一个挑战。在这项工作中，所制备的HVO纳米棒和MXene复合材料被用作ARZBs的阴极材料，在优化反应时间后通过水热法精心设计而成。结果表明，基于特殊的一维HVO纳米棒和二维多层MXene材料，HVO/MXene ARZBs能够为锌离子提供良好的传输路径，在200 mA g下表现出373 mA h g的出色初始比放电容量、良好的倍率性能和长循环寿命，在500 mA g下5000次循环后容量仅衰减15.8%。具有良好电化学性能的HVO/MXene复合材料为其在储能电池中的应用前景提供了思路。它们提供了增强的倍率性能和出色的循环稳定性，这归因于多步和多模式的锌离子插入/脱出过程。这通过HVO/MXene复合材料的一维/二维集成结构得以证实，该结构有利于锌离子扩散。
