A nickel coordination polymer derived from 1,2,4,5-tetraaminobenzene for fast and stable potassium battery anodes.,Chemical Communications

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A nickel coordination polymer derived from 1,2,4,5-tetraaminobenzene for fast and stable potassium battery anodes.
Chemical Communications ( IF 4.3 ) Pub Date : 2020-01-10 , DOI: 10.1039/c9cc07748k
Roman R Kapaev ₁ , Ivan S Zhidkov , Ernst Z Kurmaev , Keith J Stevenson , Pavel A Troshin

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We report the application of a Ni-based coordination polymer derived from 1,2,4,5-tetraaminobenzene (P1) as a fast and stable potassium battery anode. In a voltage range of 0.5-2.0 V vs. K+/K, a reversible capacity of 220 mA h g-1 was obtained at 0.1 A g-1. Even with a relatively high electrode loading of 5.0 mg cm-2 and only 10 wt% carbon additive, 118 mA h g-1 was still retained at 1 A g-1. For thinner electrodes with 30 wt% carbon, a capacity of up to 104 mA h g-1 was observed at 10 A g-1 (charging in ∼40 seconds). An areal capacity of up to 2.73 mA h cm-2 was demonstrated. The capacity fade at 1 A g-1 was only 4.4% after 200 cycles. Structure transformations of P1 during charge/discharge were studied using X-ray photoelectron spectroscopy and in situ X-ray diffraction.

中文翻译：

从1,2,4,5-四氨基苯衍生的镍配位聚合物，用于快速稳定的钾电池阳极。

我们报告了从1,2,4,5-四氨基苯（P1）衍生的镍基配位聚合物作为快速稳定的钾电池阳极的应用。在相对于K + / K的0.5-2.0 V电压范围内，在0.1 A g-1时可获得220 mA h g-1的可逆容量。即使在5.0 mg cm-2的较高电极负载和仅10 wt％的碳添加剂的情况下，仍可在1 A g-1的条件下保持118 mA h g-1的浓度。对于碳含量为30 wt％的较薄电极，在10 A g-1下（约40秒充电），观察到的容量高达104 mA h g-1。面积容量高达2.73 mA h cm-2。200次循环后，在1 A g-1处的容量衰减仅为4.4％。使用X射线光电子能谱和原位X射线衍射研究了P1在充电/放电过程中的结构转变。

更新日期：2020-01-10

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