Novel N-doped multichannel carbon nanofiber architecture with porous CoS nanoprisms for high-performance potassium-ion batteries  

作　　者：Jae Bong Lim Seung-Keun Park 

机构地区：[1]Department of Advanced Materials Engineering,Chung-Ang University,Gyeonggi-do,17546,Republic of Korea [2]Department of Intelligence Energy and Industry,Chung-Ang University,Seoul,06974,Republic of Korea [3]Western Seoul Center,Korea Basic Science Institute,Seoul,03759,Republic of Korea

出　　处：《Rare Metals》2024年第3期971-983,共13页稀有金属（英文版）

基　　金：financially supported by a National Research Foundation of Korea(NRF)from the Korean government(MSIT)(No.2020R1C1C1003375)。

摘　　要：Potassium-ion batteries(PIBs)have gained significant attention as an alternative to lithium-ion batteries(LIBs)due to the abundance of potassium(K)and low cost.Nevertheless,the difficulty in finding appropriate electrode materials that can efficiently store the larger K ions has hindered their practical application.Herein,we report a novel anode material,N-doped multichannel carbon nanofibers embedded with porous CoS nanoprisms(CSP@NMCNF),for high-performance PIBs.The CSP@NMCNF was synthesized using a two-step strategy comprising of the electrospinning of Co acetate hydroxide nanoprism/binary polymer blend and a subsequent heat treatment.The porous CoS nanoprisms with an anisotropic morphology were well aligned along the length axis of the N-doped multichannel carbon nanofibers,thus ensuring their structural stability during the repeated charge-discharge process.In addition,numerous pores facilitated the transport of electrons and ions.Accordingly,the CSP@NMCNF anode exhibited excellent electrochemical performance,delivering a high specific capacity of 368 mAh·g^(-1)at 0.5 A·g^(-1)after 200 cycles and excellent rate capability(232 mAh·g^(-1)at 2.0 A·g^(-1)).

关 键 词：K-ion batteries Cobalt sulfide Multichannel structured composite ELECTROSPINNING Nanoprism Porous structure 

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