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首页> 外文期刊>Carbon: An International Journal Sponsored by the American Carbon Society >SULFATE GRAPHITE INTERCALATION COMPOUNDS - NEW ELECTROCHEMICAL DATA AND SPONTANEOUS INTERCALATION
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SULFATE GRAPHITE INTERCALATION COMPOUNDS - NEW ELECTROCHEMICAL DATA AND SPONTANEOUS INTERCALATION

机译：硫酸盐石墨嵌入化合物-新的电化学数据和自发嵌入

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During the electrochemical intercalation and deintercalation processes of sulfuric acid into graphite, the electrical resistivity along the graphene layers was followed with a contactless method. At 20 degrees C, the intercalation process is associated with a large decrease of resistivity; the lowest values are observed for stages 8 to 5 formation, and remain nearly constant until stage 1. However, the intercalation reaction is limited by the oxidation of sulfuric acid and by graphite overoxidation; these effects appear for an apparent charge transfer of C-10(+). Between 190 and 300 degrees C (1 or 1000 bar), pure sulfuric acid intercalates readily into graphite without external chemical or electrochemical oxidation. The formation of sulfate GIC is related to the decomposition of H2SO4 progressively evolving sulfur trioxide, which is a powerful oxidizing agent. Oxidation reaction, increasing with temperature above 250 degrees C, is expressed by the apparition of corrosion holes. The samples have been characterized by X-ray diffraction, resistivity measurements, and scanning electron microscopy. [References: 15]
机译：在硫酸到石墨的电化学嵌入和脱嵌过程中，沿石墨烯层的电阻率采用无接触方法。在20摄氏度时，插层过程会导致电阻率大大降低;在第8到第5阶段的形成过程中观察到了最低值，直到第1阶段几乎保持恒定。但是，插层反应受到硫酸的氧化和石墨过氧化的限制;这些作用表现为C-10（+）的明显电荷转移。在190至300摄氏度（1或1000巴）之间，纯硫酸容易插入石墨中，而无外部化学或电化学氧化作用。硫酸盐GIC的形成与H2SO4的分解有关，H2SO4逐渐释放出三氧化硫，这是一种强大的氧化剂。氧化反应随温度升高超过250摄氏度而增加，表现为腐蚀孔的出现。通过X射线衍射，电阻率测量和扫描电子显微镜对样品进行了表征。 [参考：15]

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