Efficient heat dissipation is a crucial issue for electrochemical energy storage devices like supercapacitors. A large amount of heat is generated during the charging and discharging processes, especially at high current densities. This significantly accelerates capacity fading and serious safety problems such as explosions might occur for energy storage devices, and it can also cause human discomfort and even skin burns for wearable electronic or implantable electronic devices if the heat does not dissipate efficiently. In this contribution, highly thermally conductive electrodes based on graphene–MnO₂ films are developed, which demonstrate high thermal conductivity of 613.5 W m⁻¹ K⁻¹ relative to that of 1.1 W m⁻¹ K⁻¹ of the traditional MnO₂ slurry electrodes. The high thermal conductivity film electrode-based supercapacitor not only exhibits excellent heat dissipation ability during the charging and discharging processes, which is beneficial for the thermal management of supercapacitor devices, but also good cycling performance and excellent rate capacity for a high specific capacity of about 218.8 F g⁻¹ at a high current density of 10 A g⁻¹.

中文翻译：

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用于超级电容器的高导热石墨烯基电极，具有出色的散热能力

对于诸如超级电容器之类的电化学能量存储设备而言，有效的散热是至关重要的问题。在充电和放电过程中会产生大量热量，尤其是在高电流密度下。这显着加速了容量衰减，并且严重的安全问题（例如储能设备可能会发生爆炸），如果热量无法有效消散，还会导致人体不适，甚至可穿戴电子设备或植入式电子设备灼伤皮肤。在这方面的贡献，基于石墨烯的MnO的高导热性电极_2层膜的开发，其证明613.5女男的高导热性^-1 ķ ^-1相对于1.1脉冲W M ^-1 ķ ^-1传统的MnO ₂浆料电极。高导热率薄膜电极基超级电容器不仅在充电和放电过程中表现出出色的散热能力，这有利于超级电容器器件的热管理，而且还具有良好的循环性能和出色的倍率容量，可实现约20的高比容量。 218.8 F G ^-1以10A g的高电流密度^-1。