SnO_(2)/C复合纳米材料的制备及储钠性质的研究

Research on SnO_(2)/C Nanocomposites as Anode Material of Sodium Ion Battery

二氧化锡由于其低电位和高储钠理论容量以及绿色无毒的优点被认为是最有前途钠离子电池负极材料之一。但其导电性不好,且在嵌/脱钠的过程中会发生体积膨胀,从而导致电池的容量和循环稳定性等电化学性能下降。碳具有良好的导电性,同时能减缓材料在脱/嵌钠过程的体积膨胀,本文采用一步合成制备SnO_(2)/C复合纳米材料,并将其作为钠离子电池的负极材料进行研究。结果发现碳包覆花瓣状SnO_(2)复合材料相比于纯的SnO_(2)具有良好的储钠性能.

SO_(2) is considered to be one of the most promising SIBs anode materials due to high theoretical capacity,lower potential,environmental-friendly and non-toxic.But its conductivity is not good,and in the process of sodiation/desodiation,volume expansion will occur,resulting in the battery capacity and cycle stability and other electrochemical performance degradation.Because of carbon has good conductivity,and can inhibit the volume expansion of material in the process of sodiation/desodiation.Therefore,we prepared SnO_(2)/C nanocomposites by one-step synthesis.When as the anodes of sodium-ion batteries(SIBs),the carbon-coated SnO_(2) had better electrochemical properties than pure SnO_(2).