Jiayi Xu , Kongjun Zhu , Zhen Zhu , Penghua Liang , Zheng Zhang , Hongjuan Zheng , Jingsong Liu , Kang Yan , Jing Wang
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引用次数: 0
摘要
结构储能技术是减轻电能储存系统重量的潜在解决方案。锌离子纤维电池因其灵活性、安全性和轻量化而对该技术具有重要意义。作为纤维电池生产的一个组成部分,纤维电极的结构设计陷入了两难境地。有芯的纤维电极难以连续制备,而无芯的纤维电极机械强度又不尽人意。本文采用湿法纺丝,以 25 mm s-1 的速度连续制备带芯的纤维电极。将未加工的商用五氧化二钒粉末、乙炔黑和聚偏氟乙烯混合成浆料。设计了一个特殊的锥形凹面喷嘴,使浆料充分浸润芯材并能很好地挤出。因此,纤维电极具有 303 兆帕的高极限抗拉强度,并能在 5000 次弯曲循环后保持微观结构不变。经过 100 次循环后,锌离子纤维电池在 0.1 A g-1 条件下的比容量为 134 mAh g-1。这项工作展示了一种简单高效的带芯纤维电极制备方法,为柔性电子制造和结构储能技术提供了一种新策略。
Continuous wet spinning of V2O5 fiber electrodes with silver-plated yarn core for Zn ion fiber batteries
Structural energy storage technology is a potential solution to reduce the weight of electrical energy storage systems. Zn ion fiber batteries are important for this technology given their flexibility, safety, and lightweight. As a component of fiber battery production, the structural design of fiber electrodes is caught in a dilemma. Fiber electrodes with core are difficult to prepare continuously, while fiber electrodes without core have unsatisfactory mechanical strength. Herein, a wet spinning method is used to prepare fiber electrodes with core continuously at a speed of 25 mm s−1. Raw commercial vanadium pentoxide powders, acetylene black, and polyvinylidene fluoride are mixed into a slurry. A special tapered concave nozzle is designed to make the slurry saturate the core fully and be extruded well. Therefore, the fiber electrodes own a high ultimate tensile strength of 303 MPa and maintain the microstructure after 5000 bending cycles. The Zn ion fiber batteries exhibit a specific capacity of 134 mAh g−1 at 0.1 A g−1 after 100 cycles. This work shows a simple and efficient way to prepare fiber electrodes with core, which provides a new strategy for flexible electronic manufacturing and structural energy storage technology.
期刊介绍:
The Journal of Power Sources is a publication catering to researchers and technologists interested in various aspects of the science, technology, and applications of electrochemical power sources. It covers original research and reviews on primary and secondary batteries, fuel cells, supercapacitors, and photo-electrochemical cells.
Topics considered include the research, development and applications of nanomaterials and novel componentry for these devices. Examples of applications of these electrochemical power sources include:
• Portable electronics
• Electric and Hybrid Electric Vehicles
• Uninterruptible Power Supply (UPS) systems
• Storage of renewable energy
• Satellites and deep space probes
• Boats and ships, drones and aircrafts
• Wearable energy storage systems