A Layered P2-and O3-Type Composite as a High-Energy Cathode for Rechargeable Sodium-Ion Batteries
A Layered P2-and O3-Type Composite as a High-Energy Cathode for Rechargeable Sodium-Ion Batteries
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DOI：
10.1002/anie.201411788
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发表时间：
2015-05-11
影响因子：
16.6
通讯作者：
Zhou, Haoshen
中科院分区：
文献类型：
--
作者：
Guo, Shaohua;Liu, Pan;Zhou, Haoshen
为了获得高能量密度和长循环寿命的钠离子电池，提出了一种P2和O3一体化的层状复合材料。用X射线衍射仪、SAED、HAADF和ABF-STEM在原子分辨率上清楚地表征了这种层状氧化物中P2和O3结构的整合。在电化学反应过程中，这种层状P2+O3复合材料中的两相协同作用被很好地建立起来。这种层状复合材料可以提供高的可逆容量，最大能量密度为640mAhg(-1)，并且具有良好的容量保持率，超过钠提取和插入的150倍。
A layered composite with P2 and O3 integration is proposed toward a sodium-ion battery with high energy density and long cycle life. The integration of P2 and O3 structures in this layered oxide is clearly characterized by XRD refinement, SAED and HAADF and ABF-STEM at atomic resolution. The biphase synergy in this layered P2 + O3 composite is well established during the electrochemical reaction. This layered composite can deliver a high reversible capacity with the largest energy density of 640 mAh g(-1), and it also presents good capacity retention over 150 times of sodium extraction and insertion.