Abstract There are still serious barriers from laboratory exploration to large-scale production of commercializing high-quality graphene, especially by environmental-friendly methods. In this study, a simple and efficient electrochemical method for the preparation of high-quality water-dispersible graphene has been developed using molybdate aqueous solutions as the electrolyte. The exfoliation of graphite paper could be achieved in the electrolyte with a high yield of a few layers graphene (1–5 layers, 76%) and uniform lateral size (1–6 μm, 90%). The as-obtained few layers graphene well dispersed in aqueous solution with a solubility of ~4 mg mL−1 and stability for at least 2 months. It provides a new green method to prepare high-quality graphene. The as-prepared water-dispersible graphene films exhibit significant electrothermal performance, with a steady-state temperature of 147 °C under voltage of 10 V and a maximum heating rate achieved of 11.8 °C s-1.

中文翻译：

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钼酸盐水溶液中少层石墨烯的电化学剥离及其在快速电热膜中的应用

摘要 从实验室探索到大规模商业化高质量石墨烯，特别是通过环境友好的方法，仍然存在严重障碍。在这项研究中，开发了一种以钼酸盐水溶液为电解质制备高质量水分散性石墨烯的简单有效的电化学方法。石墨纸的剥离可以在电解液中以几层石墨烯（1-5 层，76%）和均匀的横向尺寸（1-6 μm，90%）的高产率实现。所获得的几层石墨烯很好地分散在水溶液中，溶解度约为 4 mg mL-1，稳定性至少 2 个月。它为制备高质量石墨烯提供了一种新的绿色方法。所制备的水分散性石墨烯薄膜表现出显着的电热性能，