We report an approach to fabricate high conductivity graphite sheets based on a heat-and-current treatment of filtrated, exfoliated graphite flakes. This treatment combines heating (~ 900 °C) and in-plane electrical current flow (550 A·cm⁻²) to improve electrical conductivity through the reduction of crystalline defects. This process was shown to require only a 1-min treatment time, which resulted in a 2.1-fold increase in electrical conductivity (from 1088 ± 72 to 2275 ± 50 S·cm⁻¹). Structural characterization by Raman spectroscopy and X-ray diffraction indicated that the improvement electrical conductivity originated from a 30-fold improvement in the crystallinity (Raman G/D ratio increase from 2.8 to 85.3) with no other observable structural transformations. Significantly, this treatment was found to act uniformly across a macroscopic (10 mm) sheet surface indicating it is on the development of applications, such as electrodes for energy generation and storage and electromagnetic shielding, as well as on the potential for the development of large-scale treatment technologies.

我们报告了一种基于对滤过的，脱落的石墨片进行热流处理的高导电率石墨片的制造方法。该处理结合了加热（〜900°C）和面内电流（550 A·cm ^-2），以通过减少晶体缺陷来提高电导率。结果表明，该过程仅需要1分钟的处理时间，从而导致电导率增加2.1倍（从1088±72到2275±50 S·cm ^-1）。通过拉曼光谱和X射线衍射进行的结构表征表明，电导率的提高源自结晶度的30倍提高（拉曼G / D比从2.8提高至85.3），没有其他可观察到的结构转变。值得注意的是，发现这种处理在整个宏观（10毫米）板材表面上均一地起作用，这表明该处理正在开发中，例如用于能量产生和存储以及电磁屏蔽的电极，以及开发大型纸的潜力。规模的处理技术。