文献类型：期刊文献

英文题名：Autonomous self-healing strategy for flexible fiber lithium-ion battery with ultra-high mechanical properties and volumetric energy densities

作者：Zhao, Chenpeng[1];Wang, Rui[1];Liang, Han[1];Fang, Biao[1];Li, Ruqing[1];Wu, Ruilin[1];Mo, Runwei[1,2]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200030, Peoples R China;[2]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China

年份：2024

卷号：496

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20243116778509);WOS:【SCI-EXPANDED(收录号:WOS:001283276100001)】；

基金：This research was supported by Shanghai pilot Program 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 lithium-ion battery; Structural engineering; Self-healing; Mechanical properties; Volumetric energy densities

摘要：The development of wearable devices urgently requires flexible, lightweight, and high-performance power solutions. Flexible fiber batteries are flexible and deformable, which holds great potential in this field. However, it still face significant challenges in achieving excellent electrochemical performance and good mechanical properties. Herein, we developed a new method for preparing flexible fiber lithium-ion batteries by surface etching and in-situ chemical cross-linking strategies using direct ink writing-based 3D printing technology. On the one hand, the surface of graphene oxide undergoes oxidation and etching to form pores. This unique pore structure provides additional channels for ions, which increases the ion transmission rate. On the other hand, polyvinyl alcohol/sodium metaborate is introduced into the printing ink/coagulation bath. In-situ chemical cross-linking occurs during the printing and curing process, which exhibits self-healing properties. The flexible fiber electrode has excellent strain (similar to 30 %) at the macro level, and the assembled fiber lithium-ion battery exhibits impressive volumetric energy density (157.9 mWh cm(-3)), which exceeds previously reported flexible fiber batteries. And it is also integrated into wearable smart watches for use in daily life. This work proposes an innovative method to fabricate high-performance flexible fiber electrodes, which is of great significance for promoting the development of future portable/wearable electronics.