氧烷
锰
吸收(声学)
杂质
材料科学
钠
氧化钠
氧化物
X射线吸收光谱法
电化学
光谱学
衍射
分析化学(期刊)
吸收光谱法
离子
电池(电)
X射线光电子能谱
化学
电极
化学工程
冶金
物理化学
光学
有机化学
色谱法
量子力学
功率(物理)
复合材料
工程类
物理
作者
Tianyuan Ma,Gui‐Liang Xu,Xiaoqiao Zeng,Li Yan,Yang Ren,Chengjun Sun,Steve M. Heald,Jacob Jorné,Khalil Amine,Zonghai Chen
标识
DOI:10.1016/j.jpowsour.2016.11.022
摘要
In situ high energy X-ray diffraction (HEXRD) and in situ X-ray absorption near edge spectroscopy (XANES) were carried out to understand the solid state synthesis of NaxMnO2, with particular interest on the synthesis of P2 type Na2/3MnO2. It was found that there were multi intermediate phases formed before NaMnO2 appeared at about 600 °C. And the final product after cooling process is a combination of O′3 NaMnO2 with P2 Na2/3MnO2. A P2 type Na2/3MnO2 was synthesized at reduced temperature (600 °C). The influence of Na2CO3 impurity on the electrochemical performance of P2 Na2/3MnO2 was thoroughly investigated in our work. It was found that the content of Na2CO3 can be reduced by optimizing Na2CO3/MnCO3 ratio during the solid state reaction or other post treatment such as washing with water. We expected our results could provide a good guide for future development of high performance cathode materials for sodium-ion batteries.
科研通智能强力驱动
Strongly Powered by AbleSci AI