Ni‐based coordination polymer derived from 3,3′‐diaminobenzidine (Ni‐DAB) is reported as a stable potassium battery anode working in the safe voltage window of 0.4–2.0 V versus K⁺/K. At a low current density of 50 mA g⁻¹, specific discharge capacity of 183 mA h g⁻¹ is reached. Capacity of 158 mA h g⁻¹ is obtained at 1 A g⁻¹, whereas capacity decay is only 0.014% per cycle over 600 cycles, which is among the best cycling stability results reported for electrode materials used in potassium batteries.

中文翻译：

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镍基配位聚合物有望成为钾电池的负极材料

据报道，衍生自3,3'-二氨基联苯胺（Ni-DAB）的镍基配位聚合物是一种稳定的钾电池阳极，其相对于K ⁺ / K的安全电压范围为0.4–2.0V 。在50 mA g ^-1的低电流密度下，比放电容量达到183 mA h g ^-1。在1 A g ^-1下可获得158 mA h g ^-1的容量，而在600次循环中，每个循环的容量衰减仅为0.014％，这是报告用于钾电池的电极材料的最佳循环稳定性结果之一。