期刊
ADVANCED FUNCTIONAL MATERIALS
卷 30, 期 50, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202004885
关键词
aqueous zinc-ion batteries; functional protection layers; Zn metal anodes
类别
资金
- National Key Research and Development Program of China [2016YFB0901503]
- National Natural Science Foundation of China [21875238, 21521001]
A fast ion conductor, NaTi2(PO4)(3)(NTP), is hydrothermally synthesized as a solid-state electrolyte protection layer on the surface of Zn anodes (NTP@Zn). NTP has fast ionic conductivity compared with other insoluble phosphates, such as TiP2O7(TPO) and Zn-3(PO4)(2)(ZPO), which is demonstrated by the density-functional theory calculation and cyclic voltammetry tests. X-ray photoelectron spectrometer, X-ray powder diffraction, and HRTEM analyses show that the internal transport/mobility of Zn(2+)can be achieved in NTP layer as an ion passable fence. The NTP layer with a thickness of 20-25 mu m not only prevents side reactions and zinc dendrites, but also improves the reversibility of Zn deposition and electrochemical performance. The NTP@Zn/MnO(2)battery represents the best long-life performance among Zn/MnO(2)batteries to date, which successfully retains a considerable capacity of 105 mA h g(-1)with a CE nearly 100% after 10 000 charge/discharge cycles at 10 C (approximate to 1.5 A g(-1)). Each cycle capacity attenuation rate is only 0.004%. This work represents an advanced step toward long-life Zn metal anodes for aqueous zinc-ion batteries.
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