Construction of MnO2 Nanowire for a High-Performance Lithium Ion Supercapacitor

• 作者: Haizhu Sun Wenbo Wang Yang Su Yanhong Shi Yihai Wang
• 来源期刊: 材料科学与应用(英文)
• 学科: 工学
• 关键词: MANGANESE dioxide NANOSTRUCTURE N-DOPED porous carbon LITHIUM-ION SUPERCAPACITOR
• 年，卷（期）: 2019,（1）
• 页码范围: 18-23
• 页数: 6页
• 分类号: TB3

摘要

Developing lithium ion capacitors possessing both brilliant energy and power density is still significant for numerous re-searchers.In this paper,we synthesized MnO2 nanowires via a simple hydrothermal process.The nanostructure MnO2 can expose more electrochemical sites and thus optimize the kinetics of Li+.Moreover,we used MnO2 nanowires(MnO2 NWs)as anode and a N-doped porous carbon(NPC)as cathode to assemble lithium ion capacitors(MnO2 NWs//NPC LIC).Compared to the traditional supercapacitor with aqueous electrolyte,the MnO2 NWs//NPC LIC exhibits a wider voltage of 0-4.2 V,which is helpful to enhance its energy and power density.Furthermore,MnO2 NWs//NPC LIC can deliver an excellent capacity of 150 mAh g-1 with an excellent energy density of 82.7 Wh kg-1 and power density of 1.05 kW kg-1.Meanwhile,a good cyclic stability of LICs with a 20%retention after 1000 times charge and discharge process proves its practical potential,indicating a good promising for the application in storage devices.