摘要
为了开发过期藻酸双酯钠药片中的非医疗价值,首先采用扫描电子显微镜、能量色散X射线光谱仪及Fourier红外光谱仪研究了其微观形貌、元素组成及结构,然后进一步利用恒流充/放电与循环伏安技术研究了其电化学储钠/锂性能。结果表明:虽然藻酸双酯钠药片已经过期3年,但其主要成分和结构并未发生明显变化;在50 mA/g循环充/放电时,藻酸双酯钠负极材料在钠离子电池和锂离子电池中的首次放电比容量分别为126.6和282.3 mA?h/g,可逆放电比容量分别为95.7和158.5 mA?h/g,表现了良好的电化学储钠/锂性能及作为钠/锂离子电池负极活性材料的可行性。
In order to exploit the non-medical values of expired propylene glycol alginate sodium sulfate, its morphology, element component and microstructure were firstly characterized by scanning electron microscopy, energy dispersive X-ray spectroscopy and Fourier transform infrared spectroscopy. The corresponding electrochemical Na/Li-storage performance was also investigated by galvanostatic charge/discharge and cyclic voltammetry. The results show that little structural change occurs although propylene glycol alginate sodium sulfate has expired for 3 years. The initial specific capacities of expired propylene glycol alginate sodium sulfate anode in sodium/lithium ion batteries are 126.6 and 282.3 m A?h/g when cycling at 50 m A/g, and the corresponding reversible specific capacities are 95.7 and 158.5 m A?h/g at 50 m A/g, respectively, indicating the optimum Na/Li-storage performances and a high feasibility in sodium/lithium ion batteries.
引文
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