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采用水热法合成了新型锂离子电池阳极材料Zn2SnO4纳米晶。研究了水热时间对材料结构、形貌及电化学性能的影响。通过X射线衍射、透射电镜和电化学法表征了产物的结构和形貌,并测试了材料的电化学特性。结果表明:水热时间将影响产物的形貌、尺寸和结晶度,从而影响其电化学性能。220 ℃水热处理 28h后,所获得的Zn2SnO4具有较小的颗粒尺寸和较高的结晶度,其初始放电比容量,在 100mA/g 恒电流密度和0～1.4V电压范围内,达 591.9 (mA.h)/g;同样温度处理24h 后获得的Zn2SnO4其初始放电容量为502.7mA.h/g,充放电14次后仍有409.5 (mA.h)/g。220 ℃水热处理获得的Zn2SnO4具有锂离子电池阳极材料应用所需的优异的电化学特性。
Hydrothermal synthesis of a new type of lithium ion battery anode material Zn2SnO4 nanocrystals. The effect of hydrothermal time on the structure, morphology and electrochemical properties of the material was investigated. The structure and morphology of the product were characterized by X-ray diffraction, transmission electron microscopy and electrochemical methods, and the electrochemical properties of the material were tested. The results show that the hydrothermal time will affect the morphology, size and crystallinity of the product, thus affecting its electrochemical performance. After hydrothermal treatment at 220 ℃ for 28h, the obtained Zn2SnO4 has a smaller particle size and higher crystallinity. The initial discharge specific capacity of the obtained Zn2SnO4 reaches 591.9 (mA) at a constant current density of 100mA / g and a voltage range of 0 ~ 1.4V .h) / g. The initial discharge capacity of Zn2SnO4 obtained after the same temperature treatment for 24h was 502.7mA.h / g, and 409.5 (mA.h) / g remained after 14 charge and discharge cycles. The Zn2SnO4 hydrothermally treated at 220 ° C has the excellent electrochemical properties required for anode materials for lithium-ion batteries.