新型锡基凝胶Polymer电极及其在钠离子电容器中的应用
Novel Tin-based Gel Polymer Electrode and Its Use in Sodium-ion Capacitor
摘要：
我们提出了一种新的锡基柔性，凝胶聚合物负电极用于钠离子器件。通过将锡微粒捕获在由浸没沉淀相转化形成的多孔电解质膜中并浸泡在钠离子传导液体电解质中来制备电极。锡颗粒是活性电极材料以及电子导体，而凝胶聚合物能够有效地将离子转移到锡颗粒。用扫描电镜对复合凝胶电极及其在钠离子电容器中的性能进行了分析。X射线衍射、循环伏安法和恒电流充放电。电容器的比容量显示出初始增加，高达175次充放电循环。这种增加可以通过锡的表面积增加来解释，这是由于在钠的重复插入/脱嵌时较大颗粒的崩解。还测量了在1 A g-1下的210 mAh g-1的高电容。
英文摘要：
We present a novel tin based flexible, gel polymer negative electrode for use in sodium-ion devices. The electrodes have been prepared by trapping tin micro-particles in a porous electrolyte membrane formed by immersion precipitation phase-inversion and soaking in a sodium-ion conducting liquid electrolyte. The tin particles are the active electrode materials as well as electron conductors, while the gel polymer enable efficient ion-transfer to the tin particles. The composite gel electrode and its performance in sodium-ion capacitor has been analyzed using scanning electron microscopy. x-ray diffraction, cyclic voltammetry and galvanostatic charge-discharge. The specific capacity of the capacitor shows an initial increase, up to 175 charge-discharge cycles. This increase has been explained by the increase in surface area of tin due to disintegration of the larger particles upon repeated insertion/de-insertion of sodium. A high capacitance of 210 mAh g-1 at 1 A g-1 has also been measured.
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