演題：Synthesis of Li4Ti5O12 and Design for Hybrid Capacitors
Electrochemical capacitors (ECs), also called super-capacitors or ultra-capacitors, are charge storage device with capacities intermediate between those of electrolytic capacitors and rechargeable batteries. ECs store charge at the electrode/electrolyte interface either through conventional non-Faradic means, by forming an electric double layer (called electrochemical double layer capacitors, EDLCs), or by a limited Faradic reaction (pseudocapacitors). In addition, more recently, researchers have begun to explore the combination of both Faradic and non-Faradic processes in the same hybrid device to overcome the limits of conventional EDLCs. The combination of an electric double-layer electrode, usually activated carbon (AC), with a battery electrode has drawn a considerable amount of research attention, for example, AC/Ni(OH)2 with an aqueous electrolyte and
AC/Li4Ti5O12 (LTO) with a non-aqueous electrolyte. This is because the high working voltage and energy density of the battery electrode afford significantly higher overall energy density than that possible with EDLCs.
In particular, there has been considerable interest in the combination of AC positive electrodes with nanostructured LTO negative electrodes in organic or Li salt electrolytes. In this study, We investigated the electrochemical properties of the hybrid capacitor by applying this synthesis of LTO material.
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