Herrera Santiago E, Tesio Alvaro Y, Clarenc Romain, Calvo Ernesto J
INQUIMAE, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabell'on 2, Ciudad Universitaria, AR-1428 Buenos Aires, Argentina.
Phys Chem Chem Phys. 2014 Jun 7;16(21):9925-9. doi: 10.1039/c3cp54621g. Epub 2014 Jan 16.
Ex situ atomic force microscopy (AFM) has been used to study the morphology of oxygen reduction products in the LiPF6-dimethyl sulfoxide (DMSO) electrolyte, i.e. Li2O2 on a highly oriented pyrolytic graphite (HOPG) surface. Both cyclic voltammetry and chronoamperometry have shown that at low cathodic polarization the initial deposits decorate the edge steps of HOPG. At higher overpotentials a massive deposit covers the terraces. Upon charging the battery cathode Li2O2 oxidation and dissolution do not take place until high overpotentials are reached at which solvent decomposition has been demonstrated by in situ FTIR studies.
非原位原子力显微镜（AFM）已被用于研究LiPF6 - 二甲基亚砜（DMSO）电解质中氧还原产物的形态，即在高度取向热解石墨（HOPG）表面上的Li2O2。循环伏安法和计时电流法均表明，在低阴极极化下，初始沉积物会修饰HOPG的边缘台阶。在更高的过电位下，大量沉积物会覆盖平台。在对电池阴极充电时，直到达到高过电位时Li2O2才会发生氧化和溶解，原位傅里叶变换红外光谱（FTIR）研究已证明此时会发生溶剂分解。
