熔盐锌热法制备三维多孔碳用于高性能钾离子电池负极材料
Three-Dimensional Porous Carbon Prepared by Molten Salt Zinc-Thermal Method as Anode for High Performance Potassium Ion Batteries
作者单位E-mail
马凯 中国科学技术大学化学与材料科学学院, 合肥 230026  
林宁 中国科学技术大学化学与材料科学学院, 合肥 230026 ningl@mail.ustc.edu.cn 
摘要: 采用熔盐锌热法,以蔗糖为前驱体成功制备了三维多孔碳材料,并将其用作钾离子电池负极材料。所制备的三维多孔碳具有大量相互贯通的孔道,有效地缓解了电极在充放电循环过程中的体积效应,提高了电解液对电极的浸润性,缩短了钾离子的扩散路径,从而展现出优异的循环稳定性和倍率性能。三维多孔碳电极在0.5 A·g-1的电流密度下,经过2 500次循环后仍展现174.6 mAh·g-1的比容量,甚至在4.4 A·g-1的高倍率下容量仍保持在170 mAh·g-1
关键词: 锌热  三维多孔碳  倍率性能  循环稳定性  钾离子电池
基金项目: 国家自然科学基金(No.21701163,No.21671181,No.21831006)和安徽省青年基金(No.1808085QB25)资助项目
Abstract: Three-dimensional (3D) porous carbon materials are successfully prepared by molten salt zinc-thermal method using sucrose as precursor and used as anode materials for potassium ion batteries. The prepared 3D porous carbon has a large number of interconnected channels, which can effectively alleviate the volume effect of the electrode during the charge-discharge cycling process, improve the infiltration of electrolyte to the electrode, shorten the diffusion path of K+. Therefore, it shows excellent cycle stability and rate performance. 3D porous carbon electrode delivers the specific capacity of 174.6 mAh·g-1 after 2 500 cycles at current density of 0.5 A·g-1 and 170 mAh·g-1 at a high rate of 4.4 A·g-1.
Keywords: zinc-thermal  3D porous carbon  rate performance  cycle stability  potassium ion batteries
投稿时间:2019-07-01 修订日期:2019-09-24
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马凯,林宁.熔盐锌热法制备三维多孔碳用于高性能钾离子电池负极材料[J].无机化学学报,2020,36(3):415-420.
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