材料科学
阴极
高分辨率透射电子显微镜
电化学
热液循环
钠
离子
萃取(化学)
化学工程
菱形
单晶
电极
纳米技术
透射电子显微镜
结晶学
化学
冶金
物理化学
几何学
数学
有机化学
色谱法
工程类
作者
Dawei Su,Chengyin Wang,Hyo‐Jun Ahn,Guoxiu Wang
标识
DOI:10.1002/chem.201301563
摘要
Abstract Single crystalline rhombus‐shaped Na 0.7 MnO 2 nanoplates have been synthesized by a hydrothermal method. TEM and HRTEM analyses revealed that the Na 0.7 MnO 2 single crystals predominantly exposed their (100) crystal plane, which is active for Na + ‐ion insertion and extraction. When applied as cathode materials for sodium‐ion batteries, Na 0.7 MnO 2 nanoplates exhibited a high reversible capacity of 163 mA h g −1 , a satisfactory cyclability, and a high rate performance. The enhanced electrochemical performance could be ascribed to the predominantly exposed active (100) facet, which could facilitate fast Na + ‐ion insertion/extraction during the discharge and charge process.
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