Understanding oxygen reactions in aprotic Li-O<sub>2</sub>batteries

Understanding oxygen reactions in aprotic Li-O₂batteries

Ma Shunchao^{1, 2, †,}, Zhang Yelong^{1, 2, †,}, Cui Qinghua^{1, 2}, Zhao Jing^{1, 2}, Peng Zhangquan^{1, ‡,}

In situSERS during O₂reduction and re-oxidation on Au in O₂-saturated 0.1 M LiClO₄–CH₃CN. Spectra collected at a series of times and at the reducing potential of 2.2 V versus Li/Li⁺followed by other spectra at the oxidation potentials shown. The peaks are assigned as follows: 1) C–C stretch of CH₃CN at 918 cm^–1, 2) O–O stretch of LiO₂at 1137 cm^–1, 3) O–O stretch of Li₂O₂at 808 cm^–1, and 4) Cl–O stretch ofat 931 cm^–1.^[24]