Freestanding MoSe_(2)nanoflowers for superior Li/Na storage properties  

作　　者：Qiao Cu Chao-Qun Shang Guo-Fu Zhou Xin Wang 

机构地区：[1]Guangdong Provincial Key Laboratory of Optical Information Materials,South China Normal University,Guangzhou 510006,China [2]School of Materials Science and Engineering and Hubei Key Laboratory of Plasma Chemistry and Advanced Materials,Wuhan Institute of Technology,Wuhan 430205,China [3]International Academy of Optoelectronics at Zhaoqing,South China Normal University,Zhaoqing 526060,China

出　　处：《Tungsten》2024年第1期238-247,共10页钨科技（英文）

基　　金：supported by the National Natural Science Foundation of China (No.52102296);the Guangzhou Municipal Science and Technology Bureau (No.202102020055);the Science and Technology Program of Guangzhou (No.2019050001);the Outstanding Youth Project of Guangdong Natural Science Foundation (No.2021B1515020051);the Yunnan Expert Workstation (No.202005AF150028)。

摘　　要：MoSe_(2),with high theoretical specific capacity,has attracted a lot of attention.There remains an open challenge to effectively suppress the irreversible selenium dissolution and rapid capacity decrease induced by severe volume change during cycling.Herein,we synthesize MoSe_(2)nanoflowers dispersed on one-dimensional(1D)N-doped carbon nanofibers(MoSe_(2)@NCNFs)for use as a freestanding electrode.In this unique structure,the 1D N-doped carbon nanofibers are found to not only enhance the conductivity but also ensure the structural integrity during the Li^(+)/Na^(+)insertion/destraction processes.As expected,at 2 A·g^(-1),the specific capacity of the MoSe_(2)@NCNFs is maintained at 180 mAh·g^(-1)after 500 cycles when used in lithium storage applications.Furthermore,in the case of sodium storage,at 1 A·g^(-1),the MoSe_(2)@NCNFs shows a capacity of 122mAh·g^(-1)after 500 cycles.These findings suggest that the MoSe_(2)@NCNF electrodes may be a promising candidate for use in reversible Li/Na storage applications.

关 键 词：Li/Na storage Freestanding electrode MoSe_(2) Electrochemical reaction kinetics Structural integrity 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]