一种层状 P2 和 O3 型复合结构作为可充电钠离子电池的高能阴极。
A layered P2- and O3-type composite as a high-energy cathode for rechargeable sodium-ion batteries.
机构信息
Energy Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Umezono 1-1-1, Tsukuba, 305-8568 (Japan); Graduate School of System and Information Engineering, University of Tsukuba, Tennoudai 1-1-1, Tsukuba, 305-8573 (Japan).
出版信息
Angew Chem Int Ed Engl. 2015 May 11;54(20):5894-9. doi: 10.1002/anie.201411788. Epub 2015 Apr 1.
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.
提出了一种具有 P2 和 O3 整合的层状复合材料，用于制造具有高能量密度和长循环寿命的钠离子电池。通过 XRD 细化、SAED 和 HAADF 以及原子分辨率的 ABF-STEM，清楚地对这种层状氧化物中的 P2 和 O3 结构的整合进行了表征。在电化学反应过程中，这种层状 P2+O3 复合材料中的双相协同作用得到了很好的建立。这种层状复合材料具有较高的可逆容量，最大能量密度为 640 mAh g(-1)，并且在 150 次以上的钠提取和插入过程中具有良好的容量保持率。
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