作者：SuHyunYang,Seung-KeunPark,YunChanKang 单位：DepartmentofMaterialsScienceandEngineering,KoreaUniversity；DepartmentofChemicalEngineering,KongjuNationalUniversity 本文刊于： 《Nano-Micro Letters》 2021年第01期
关键词:
Metal–organicframeworks HollowmesoporousKeywords
Metal–organic frameworks, Hollow mesoporous carbon nanospheres, Potassium-ion batteries, Cobalt selenides, Electrode materials
全文下载：需积分3点。
摘要
In this work, a novel vacuum-assisted strategy is proposed to homogenously form Metal–organic frameworks within hollow mesoporous carbon nanospheres（HMCSs） via a solid-state reaction. The method is applied to syn-thesize an ultrafine CoSe2 nanocrystal@N-doped carbon matrix confined within HMCSs（denoted as CoSe2@NC/HMCS） for use as advanced anodes in high-performance potassium-ion batteries（KIBs）. The approach involves a solvent-free thermal treatment to form a Co-based zeolitic imidazolate framework（ZIF-67） within the HMCS templates under vacuum conditions and the subsequent seleniza-tion. Thermal treatment under vacuum facilitates the infiltration of the cobalt pre-cursor and organic linker into the HMCS and simultaneously transforms them into stable ZIF-67 particles without any solvents. During the subsequent selenization process, the "dual confinement system", composed of both the N-doped carbon matrix derived from the organic linker and the small-sized pores of HMCS, can e ectively suppress the overgrowth of CoSe2 nanocrystals. Thus, the resulting uniquely structured composite exhibits a stable cycling perfor-mance(442 mAh g-1 at 0.1 A g-1 after 120 cycles) and excellent rate capability(263 mAh g-1 at 2.0 A g-1) as the anode material for KIBs.
本文地址：www.fabiao.net/content-24-2899-1.html
本文地址：www.fabiao.net/content-24-2899-1.html
上一篇：
下一篇：太阳能单罐相变蓄热系统实验测试和数值模拟研究
