Department of Chemistry, Oregon State University, Corvallis, OR, 97331-4003, USA.
Angew Chem Int Ed Engl. 2017 Oct 9;56(42):13026-13030. doi: 10.1002/anie.201707473. Epub 2017 Sep 13.
Aqueous rechargeable batteries are promising solutions for large-scale energy storage. Such batteries have the merit of low cost, innate safety, and environmental friendliness. To date, most known aqueous ion batteries employ metal cation charge carriers. Here, we report the first "rocking-chair" NH -ion battery of the full-cell configuration by employing an ammonium Prussian white analogue, (NH ) Ni[Fe(CN) ] , as the cathode, an organic solid, 3,4,9,10-perylenetetracarboxylic diimide (PTCDI), as the anode, and 1.0 m aqueous (NH ) SO as the electrolyte. This novel aqueous ammonium-ion battery demonstrates encouraging electrochemical performance: an average operation voltage of ca. 1.0 V, an attractive energy density of ca. 43 Wh kg based on both electrodes' active mass, and excellent cycle life over 1000 cycles with 67 % capacity retention. Importantly, the topochemistry results of NH in these electrodes point to a new paradigm of NH -based energy storage.
水系可充电电池是大规模储能的有前途的解决方案。此类电池具有成本低、固有安全性和环境友好性的优点。迄今为止，大多数已知的水系离子电池采用金属阳离子电荷载流子。在这里，我们报告了首例采用铵普鲁士白类似物（(NH ） Ni[Fe(CN) ] ）作为正极、有机固体 3,4,9,10-苝四羧酸二酰亚胺（PTCDI）作为负极、1.0 m 水系（NH ） SO 作为电解质的全电池构型的“摇椅式”NH -离子电池。这种新型水系铵离子电池表现出令人鼓舞的电化学性能：平均工作电压约为 1.0 V，基于两个电极的活性质量的具有吸引力的能量密度约为 43 Wh kg -1 ，并且在 1000 次循环后具有 67%的容量保持率，具有出色的循环寿命。重要的是，这些电极中 NH 的拓扑化学结果指出了基于 NH 的储能的新范例。
