A Non-aqueous H3PO4 Electrolyte Enables Stable Cycling of Proton Electrodes
A Non-aqueous H3PO4 Electrolyte Enables Stable Cycling of Proton Electrodes
复制标题
非水 H3PO4 电解质可实现质子电极的稳定循环
DOI：
10.1002/ange.202010554
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发表时间：
2020
影响因子：
--
通讯作者：
Ji, X.
中科院分区：
文献类型：
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作者：
Xu, Y.;Wu, X.;Jiang, H.;Tang, L.;Koga, K. Y.;Fang, C.;Lu, J.;Ji, X.
通过将H3PO4溶解在乙腈中，制备了一种非水质子电解质。该电解液在受激拉曼光谱中表现出独特的振动特征。与酸性水溶液相比，这种电解液表现出独特的特性：1)较高的(去)质子化电位，较低的质子解溶能；2)由于溶解抑制， 具有更好的循环稳定性；以及3)由于缺乏析氧反应， 具有较高的库仑效率。两个非水质子电池与水相对应的电池相比，表现出更好的循环稳定性、更高的库仑效率和更少的自放电。
A non‐aqueous proton electrolyte is devised by dissolving H3PO4into acetonitrile. The electrolyte exhibits unique vibrational signatures from stimulated Raman spectroscopy. Such an electrolyte exhibits unique characteristics compared to aqueous acidic electrolytes: 1) higher (de)protonation potential for a lower desolvation energy of protons, 2) better cycling stability by dissolution suppression, and 3) higher Coulombic efficiency owing to the lack of oxygen evolution reaction. Two non‐aqueous proton full cells exhibit better cycling stability, higher Coulombic efficiency, and less self‐discharge compared to the aqueous counterpart.