Beijing National Laboratory for Molecular Science, Key Laboratory of Analytical Chemistry for Living Biosystems, Institute of Chemistry, Chinese Academy of Sciences (CAS), Beijing, 100190, China.
University of Chinese Academy of Sciences, Beijing, 100049, China.
Angew Chem Int Ed Engl. 2023 Jan 23;62(4):e202216530. doi: 10.1002/anie.202216530. Epub 2022 Dec 20.
Proton conductors have attracted great attention in various fields, especially in energy production. Here, we find that graphdiyne oxide (GDYO), derived from graphdiyne (GDY), features the highest proton conductivity of 0.54 S cm (100 % RH, 348 K) among the oxidized carbon allotropes reported so far. The sp- and sp -co-hybridized carbon skeleton of GDY enables GDYO with the giant water uptake, which is 2.4 times larger than that of graphene oxide (GO), resulting in ultrahigh proton conductivity by increasing the proton concentration and proton conduction pathways. This ultrahigh proton conductivity of GDYO is further proved in a methanol fuel cell by using GDYO membrane as proton exchange membrane. The GDYO membrane enables the cell with higher open circuit voltage, larger power density and lower methanol permeability, compared with commercial Nafion 117. Moreover, the GDYO membrane bears high ion exchange capacity, good acidic stability and low swelling ratio.
质子导体在各个领域引起了极大的关注，特别是在能源生产方面。在这里，我们发现源自石墨炔（GDY）的氧化石墨炔（GDYO）具有迄今为止报道的氧化碳同素异形体中最高的质子电导率 0.54 S cm（100% RH，348 K）。GDY 的 sp- 和 sp -杂化碳骨架使 GDYO 具有巨大的吸水性，比氧化石墨烯（GO）大 2.4 倍，从而通过增加质子浓度和质子传导途径实现超高质子电导率。在甲醇燃料电池中使用 GDYO 膜作为质子交换膜进一步证明了 GDYO 的超高质子电导率。与商业 Nafion 117 相比，GDYO 膜使电池具有更高的开路电压、更大的功率密度和更低的甲醇渗透率。此外，GDYO 膜具有高离子交换容量、良好的酸性稳定性和低溶胀率。
