X-ray diffraction patterns of graphite oxide(GO)are theoretically simulated as a function of the displacements of carbon atoms using the Debye–Waller factor in terms of the Warren–Bodenstein equation.The results dem...X-ray diffraction patterns of graphite oxide(GO)are theoretically simulated as a function of the displacements of carbon atoms using the Debye–Waller factor in terms of the Warren–Bodenstein equation.The results demon-strate that GO has the turbostratically stacked structure.The high order(001)peaks gradually disappear with the increase in atomic thermal vibrations along𝑑c-axis while the(ℎk0)ones weaken for the vibrations along a-axis.When the displacement deviation𝑣ua𝑏=0.015nm and𝑣𝑑uc=0.100nm the computed result is consistent with the experimental measurements.展开更多
文摘利用工艺简单,成本低廉的共沉淀法制得Co OOH,并用作非水性锂-氧气电池阴极催化剂。通过恒流充放电、线性伏安扫描(LSV)和电化学阻抗(EIS)测试研究了电极的电化学性能。结果表明:由于Co OOH能够明显提高氧气还原反应(ORR)的催化活性,与未使用Co OOH的电极相比较,使用Co OOH为催化剂的电极首次放电容量高达5 093 m Ah·g^(-1),提高了1.7倍。电池的充电过电压降低了约460 m V,充电可逆性得到增强,充放电可逆性提高,使得循环性能得到显著改善。
基金Supported by the Innovation Foundation of the Ministry of Science and Technology of China under Grant No 10C26224302621.
文摘X-ray diffraction patterns of graphite oxide(GO)are theoretically simulated as a function of the displacements of carbon atoms using the Debye–Waller factor in terms of the Warren–Bodenstein equation.The results demon-strate that GO has the turbostratically stacked structure.The high order(001)peaks gradually disappear with the increase in atomic thermal vibrations along𝑑c-axis while the(ℎk0)ones weaken for the vibrations along a-axis.When the displacement deviation𝑣ua𝑏=0.015nm and𝑣𝑑uc=0.100nm the computed result is consistent with the experimental measurements.
