The rechargeable Zn 2+ ion batteries are promising for the sustainable energy storage device applications. Recently they have been extensively evaluated for finding new cathode material and prevention of dendrite growth at Zn plate anode. Herein we have evaluated redox active organic molecule 7,7,8,8Tetracyanoquino dimethane (TCNQ) as a cathode material for aqueous zinc battery with zinc plates as anode in 1 M ZnSO 4 . The charging/discharging of the battery was associated with formation and deformation of Zn-TCNQ complex, which was confirmed by XRD and FTIR. The specific capacity of cathode was found to be 123.2 mAh g −1 at 100 mA current density with 96% coulombic efficiency. Whereas specific capacity at 1 A current density was found to be 60 mAh g −1 with 94% coulombic efficiency. In a cycling experiments we observed the fading of capacity with time by partial dissolution of Zn-TCNQ complex. The fading of capacity was prevented by confin...

中文翻译：

---

局限在多孔有机结构中的TCNQ作为水性锌电池的阴极

Zn 2+离子可充电电池有望用于可持续的储能设备应用。最近，已对它们进行了广泛的评估，以寻找新的阴极材料并防止锌板阳极上的枝晶生长。在这里，我们已经评估了氧化还原活性有机分子7,7,8,8Tetracyanoquino dimethane（TCNQ）作为水性锌电池的正极材料，其中锌板作为阳极在1 M ZnSO 4中。电池的充电/放电与Zn-TCNQ配合物的形成和变形有关，这已通过XRD和FTIR证实。发现在100mA电流密度下具有96％的库仑效率的阴极的比容量为123.2mAh g -1。而发现在1 A电流密度下的比容量为60 mAh g -1，库仑效率为94％。在循环实验中，我们观察到部分Zn-TCNQ络合物溶解会导致容量随时间而下降。限制褪色可以防止容量下降。