In‐Situ Fabrication of Bone‐Like CoSe<sub>2</sub> Nano‐Thorn Loaded on Porous Carbon Cloth as a Flexible Electrode for Na‐Ion Storage
Huinan Guo, Guishu Liu, Mengying Wang, Yan Zhang, Weiqin Li, Kai Chen, Yafei Liu, Mengyuan Yue, Yijing Wang
Abstract
Abstract Sodium‐ion batteries (SIBs) based on flexible electrode materials are being investigated recently for improving sluggish kinetics and developing energy density. Transition metal selenides present excellent conductivity and high capacity; nevertheless, their low conductivity and serious volume expansion raise challenging issues of inferior lifespan and capacity fading. Herein, an in‐situ construction method through carbonization and selenide synergistic effect is skillfully designed to synthesize a flexible electrode of bone‐like CoSe 2 nano‐thorn coated on porous carbon cloth. The designed flexible CoSe 2 electrode with stable structural feature displays enhanced Na‐ion storage capabilities with good rate performance and outstanding cycling stability. As expected, the designed SIBs with flexible BL−CoSe 2 /PCC electrode display excellent reversible capacity with 360.7 mAh g −1 after 180 cycles at a current density of 0.1 A g −1 .