关键词: 阴离子-石墨嵌层化合物, 电化学电容器, 溶剂化效应, 双离子电池

Abstract: Anions can be electrochemically intercalated into a graphite electrode with a reversible capacity as high as 120 mAh·g^-1 at the high potential near 5 V vs. Li/Li⁺. Besides, graphite is environmentally benign, economic and abundant in China. Therefore, graphite is a very promising positive electrode material for asymmetric capacitors using non-aqueous electrolytes. However, the performance of graphite positive electrode is quite sensitive to various affecting factors, such as the compositions of electrolyte solutions, graphite type and ambient temperature, and so on. In the platform of activated carbon/graphite capacitors, the electrochemical behavior of anion-graphite intercalation compounds can be systematically studied by a series of in situ electrochemical techniques. Future development in this type of electrode materials has been anticipated in terms of new electric energy storage devices under different circumstances.

Key words: Anion-graphite intercalation compounds, Electrochemical capacitors, Solvation effect, Dual-ion cells.