近日，张汝勤同学和朱宇灿老师在电化学储能和热伪装技术领域取得了新的突破！他们成功采用退火处理和化学还原相结合的协同策略，调控了还原氧化石墨烯（rGO）薄膜的含氧官能团，实现了电导率范围为109至1348 S m的rGO薄膜的制备。这一研究不仅有效控制了薄膜制备过程中的电导率，更在材料性能及应用领域有广泛展示。rGO薄膜作为超级电容器的电极材料表现出了令人瞩目的性能。电容性能随着电导率的降低而提高，最终在0.2 A g^-1下获得了181F g^-1的比电容，而在20 A g^-1下的电容保持率高达81.8%。此外，不同电导率的rGO薄膜在热伪装领域也展现出潜力。研究发现，这些薄膜的红外发射率存在显着差异，意味着它们在热伪装中具有巨大的应用潜力。这一发现为超级电容器的性能优化提供了新的思路和方法，同时为石墨烯薄膜在电化学储能和热伪装等领域的应用提供了新的思路和方法。随着技术的进一步发展，石墨烯薄膜将在更多领域展现出其独特的优势和价值。

The regulation of physical and chemical properties for paper-like graphene films can broaden their application fields and enhance their practical value. Here, we propose a synergistic strategy of annealing treatment and chemical reduction, effectively regulating the oxygen-containing functional groups on reduced graphene oxide (rGO) films, constructing the rGO films with a conductivity range of 109–13488 S m. As electrode materials of supercapacitors, the resulting rGO films exhibit gradually improved capacitance performance with the conductivity decreases. Ultimately, the rGO films can obtain a specific capacitance of 181F g at 0.2 A g (81.8% capacitance retention rate at 20 A g). Besides, for infrared stealth, the infrared emissivity of the rGO films with different conductivities exhibits significant differences, expected application in thermal camouflage. Therefore, we believe that the conductivity regulation strategy of the rGO films is expected to enrich the performance parameters of the films, broadening their application fields.

论文题目：Controllable graphene films with different conductivities for electrochemical energy storage and thermal camouflage

论文作者：Yucan Zhu , Ruqin Zhang , Yingying Peng , Zhicheng Liu , Liang Chen , Gangyong Li , Minjie Zhou , Wei Wang , Zhaohui Hou