原位制备负载在多孔碳布上的类骨状CoSe纳米刺作为用于钠离子存储的柔性电极

In-Situ Fabrication of Bone-Like CoSe Nano-Thorn Loaded on Porous Carbon Cloth as a Flexible Electrode for Na-Ion Storage.

作者信息

Guo Huinan, Liu Guishu, Wang Mengying, Zhang Yan, Li Weiqin, Chen Kai, Liu Yafei, Yue Mengyuan, Wang Yijing

机构信息

Department Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), Renewable Energy Conversion and Storage Center, College of Chemistry, Nankai University, 300071, Tianjin, P. R. China.

出版信息

Chem Asian J. 2020 May 4;15(9):1493-1499. doi: 10.1002/asia.202000189. Epub 2020 Apr 7.

DOI:10.1002/asia.202000189

PMID:32176427

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 nano-thorn coated on porous carbon cloth. The designed flexible CoSe 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 /PCC electrode display excellent reversible capacity with 360.7 mAh g after 180 cycles at a current density of 0.1 A g .

摘要

最近，基于柔性电极材料的钠离子电池（SIBs）正在被研究，以改善缓慢的动力学并提高能量密度。过渡金属硒化物具有优异的导电性和高容量；然而，它们的低导电性和严重的体积膨胀带来了寿命短和容量衰减等具有挑战性的问题。在此，巧妙地设计了一种通过碳化和硒化物协同效应的原位构建方法，以合成一种涂覆在多孔碳布上的骨状CoSe纳米刺柔性电极。所设计的具有稳定结构特征的柔性CoSe电极表现出增强的钠离子存储能力，具有良好的倍率性能和出色的循环稳定性。正如预期的那样，具有柔性BL-CoSe/PCC电极的所设计的SIBs在0.1 A g的电流密度下循环180次后，显示出360.7 mAh g的优异可逆容量。