文献类型：期刊文献

英文题名：Interface-Engineered Self-Healing Quasi-solid Fiber Battery with High Energy Density and Robust Mechanical Properties

作者：Wu, Ruilin[1];Wang, Rui[1];Liu, Shixin[1];Wang, Menggang[1];Mo, Runwei[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200037, Peoples R China;[2]East China Univ Sci & Technol, Shanghai Key Lab Intelligent Sensing & Detect, Shanghai 200237, Peoples R China

年份：2025

卷号：7

期号：6

起止页码：1998

外文期刊名：ADVANCED FIBER MATERIALS

收录：;EI(收录号：20253419011853);WOS:【SCI-EXPANDED(收录号:WOS:001549986800001)】；

基金：This research was supported by Shanghai pilotProgram for Basic Research (Grant No. 22TQ1400100-8), Shanghai Pujiang Program (Grant No. 20PJ1402500), Natural Science Foundation of Shanghai (Grant No. 22ZR1416600) and the Fundamental Research Funds for the Central Universities.

语种：英文

外文关键词：Flexible fiber battery; Nanocomposite interfaces; Mechanical properties; Energy density; Power density

摘要：Nanocomposite technology is recognized as a general and effective strategy to enhance the performance of flexible energy storage devices. However, the enhancement of flexible batteries in nanocomposites is usually much lower than expected, which is mainly attributed to the poor interfacial interactions between active material and conductive substrate as well as sluggish Na+ diffusion kinetics and complex assembly techniques. It remains a huge challenge to simultaneously achieve good mechanical properties, excellent electrochemical performance, and high safety in flexible batteries. Here, we developed an interface engineering strategy to prepare a high-strength and high-toughness quasi-solid fiber battery using direct ink writing 3D printing, which was achieved by introducing borate ester dynamic crosslinking as bridging interaction with self-healing properties. This configuration exhibited a remarkably enhanced energy density (104 Wh kg-1) and high power density (20.8 W kg-1), with excellent strain (exceeding 25%) and outstanding thermal stability (200 degrees C), which exceeds those of previously reported. Density functional theory calculations further reveal the mechanism by which the interface engineering-based borate ester dynamic crosslinking affects the performance of fiber battery. Based on this excellent performance, fiber batteries are woven into a mobile phone pouch for wireless charging of wearable electronic devices. This work provides an effective route toward high-performance flexible energy storage devices for a broad range of applications.