A Facile Route to Synthesize Sheet-like Na2Ti3O7 with Improved Sodium Storage Properties

作     者：XIE Man WANG Kangkang CHEN Renjie LI Li WU Feng 

作者机构：Beijing Key Laboratory of Environmental Science and Engineering School of Chemical Engineering and Environment National Development Center of High Technology Green Materials Beijing Institute of Technology Beijing 100081 P. R. China 

出 版 物：《Chemical Research in Chinese Universities》 (高等学校化学研究（英文版）)

年 卷 期：2015年第31卷第3期

页      面：443-446页

核心收录：

学科分类：08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 081202[工学-计算机软件与理论] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：the National Natural Science Foundation of China(No.21373028) 

主　　题：Na2Ti307 Sodium-ion battery Anode Hollow sphere TiO2 

摘      要：A high purity sheet-like Na2Ti307 material was synthesized by a new facile solid-state method with hollow sphere TiO2 as titanium source. X-Ray diffraction（XRD） measurement proves that no impurity phase existed when the sample was heated at 900 ℃. Charge/discharge measurement was performed in a potential range of 0.01m2.5 V at different current-rates（C-rates）. The initial charge/discharge capacities are 191/424 mA.h/g at 0.1 C and still remain as high as 101 mA.h/g after 50 cycles. CV test proves that the large irreversible capacity in the initial cycle results from the formation of the solid electrolyte interface（SEI）. However, the electrode presents an increased initial cou- lombic efficiency in a 1 mol/L NaPF6 electrolyte compared to that in a 1 mol/L NaCIO4 electrolyte.