Fe(OH)_(3)@多孔碳正极材料的制备与性能研究  

Research on Preparation and Performance of Fe(OH)_(3)@Porous Carbon Cathode Material

作　　者：史广峰 柳和生 Shi Guangfeng;Liu Hesheng(Jiangxi Key Laboratory of Polymer Micro Nano Manufacturing and Devices,School of chemical biology and Material Science,East China University of Technology,Jiangxi Nanchang 330013)

机构地区：[1]东华理工大学化学生物与材料科学学院江西省聚合物微纳制造与器件重点实验室,江西南昌330013

出　　处：《江西化工》2021年第2期90-93,共4页Jiangxi Chemical Industry

摘　　要：相比于锂离子电池,锂硫电池具有更高的理论容量与能量密度。通过简单的油浴加热将FeCl 3溶液在氧化石墨烯(GO)/面粉水热碳化后的材料上原位生成了Fe(OH)_(3)纳米颗粒,随后进行渗硫制备出了锂硫正极复合材料。Fe(OH)_(3)具有大量的亲水基团,能够对多硫化物进行物理、化学吸附。GO与面粉水热碳化后的材料具有较高的比表面积,能够负载更多的活性物质S。该锂硫正极复合材料组装后的电池具有优异的电化学性能,在0.2 C时有1124 mAh/g的初始容量,循环100圈后仍有800 mAh/g以上的容量;在0.5 C时有900 mAh/g初始容量且在高达300圈的循环后仍然具有600 mAh/g以上的容量。Compared with lithium-ion batteries,lithium-sulfur batteries have a higher theoretical capacity and energy density.The FeCl 3 solution was heated in a simple oil bath to generate Fe(OH)_(3)nanoparticles in situ on the graphene oxide(GO)/flour hydrothermally carbonized material,and then sulfurized to prepare a lithium-sulfur cathode composite material.Fe(OH)_(3)has a large number of hydrophilic groups that can physically and chemically adsorb polysulfides.The material after the hydrothermal carbonization of GO and flour has a higher specific surface area and can load more active substance S.The assembled battery of the lithium-sulfur cathode composite material has excellent electrochemical performance.It has an initial capacity of 1124 mAh/g at 0.2 C,and still has a capacity of more than 800 mAh/g after 100 cycles;it has a capacity of 900 mAh/g at 0.5 C.The initial capacity of mAh/g and the specific capacity of 600 mAh/g or more after up to 300 cycles.

关 键 词：氧化石墨烯 面粉 锂硫电池 正极材料 

分 类 号：TM912[电气工程—电力电子与电力传动] TB332[一般工业技术—材料科学与工程]