Boosting sodium storage of mesoporous TiO2 nanostructure regulated by carbon quantum dots  

作　　者：Minghong Wu Yanping Gao Yu Hu Bing Zhao Haijiao Zhang 

机构地区：[1]Institute of Nanochemistry and Nanobiology,Shanghai University,Shanghai 200444,China [2]School of Environmental and Chemical Engineering,Shanghai University,Shanghai 200444,China

出　　处：《Chinese Chemical Letters》2020年第3期897-902,共6页中国化学快报（英文版）

基　　金：financial support from the Shuguang Program supported by Shanghai Education Development Foundation and Shanghai Municipal Education Commission(No.18SG035);Shanghai Pujiang Program(No.17PJD015)。

摘　　要：It has been demonstrated that the conductivity and electrochemical properties of TiO2 nanomate rials can be significantly improved by an incorporation of carbon additives.In the study,we develop a novel Ndoped TiO2 mesoporous nanostructure via the addition of carbon quantum dots(CQDs)solution following a scalable hydrothermal process.The as-made TiO2 product shows well-defined morphology,high conductivity,large surface area,and abundant mesopores.When evaluated as anodes for sodiumion batteries,the CQDs@TiO2 product annealed at 500℃exhibits a superior sodium storage capability.It delivers a high reversible capacity of 168.8 mAh/g at 100 mA/g over 500 cycles and long cycling stability.The remarkable performance of CQDs@TiO2 mainly arises from the large surface area and mesoporous architecture constructed by ultrathin TiO2 nanosheets,as well as the full coope ration between CQDs and TiO2.

关 键 词：TiO2 MESOPOROUS NANOSTRUCTURE Carbon quantum DOTS ANODE materials Sodium-ion batteries 

分 类 号：TQ134.11[化学工程—无机化工] TB383.1[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]