Enabling Long‐cycling Aqueous Zn‐Mn 3 O 4 Batteries via Segregated and Interlaced Carbon Frameworks

作者：Yu-Jing Pan, Shiyong Zuo, Guo Ai, Jianjun Wei, Xiaochen Zhao, Wenfeng Mao · 发表于：Small Methods · 年份：2024 · DOI：10.1002/smtd.202401626 · 被引用次数：4 · 研究领域：Advanced battery technologies research、Advanced Battery Materials and Technologies、Advancements in Battery Materials

Abstract Mn 3 O 4 is a promising candidate for aqueous zinc ion batteries (ZIBs) due to its high theoretical capacity (468.5 mAh g −1 ) and environmental friendliness, while its practical application is hindered by slow kinetics and rapid capacity degradation. Herein, a porous Mn 3 O 4 with segregated and interlaced carbon framework (HCF‐Mn 3 O 4 ) is introduced. The in situ hydro‐assembled interlaced carbon nanotube (CNT) forms a porous structure enhancing electron conduction and accelerating Zn 2+ transport; while the segregated CNT network serves as an encapsulation layer to improve mechanical stability. Together, these features facilitate the simultaneous insertion and transformation of H + /Zn 2+ and enhance Zn 2+ diffusion kinetics. As a result, HCF‐Mn 3 O 4 achieves a high specific capacity of 474 mAh g −1 at 0.05 A g −1 , excellent rate performance of 178 mAh g −1 at 1.50 A g −1 , and stable cycling over 3000 cycles with minimal capacity decay (≈0.02% per cycle). This design offers new opportunities for developing high‐rate, long‐lasting ZIBs.