<em>High-Voltage Sodium-Ion Storage Devices Based on Asymmetric Carbon Electrode Pair</em>
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The rapid growth of modern technology has accelerated the use of diverse state-of-the-art electronic devices that require suitable power sources. Accordingly, rechargeable batteries are used in a wide variety of electronics because of their high energy density, high round-trip energy efficiency, useful power capability and long-term cycle life. On the other hand, the broad range of application devices sometimes require a higher power density and longer lifespan, requiring a diversification of applicable power sources. Supercapacitors (SC) can deliver a high power density and cycling stability of more than 10,000 charge discharge cycles. As one of the strategies to achieve a SC-like high power density and battery-like high energy density, suggested as hybrid capacitors. In this study, high-voltage sodium-ion storage devices based on asymmetric carbon-based electrode pair was developed, and their electrochemical performances were characterized.