4,5-Dimethyl-[1,3]dioxol-2-one (DMDO) was used as a novel electrolyte additive for lithium-ion batteries. The effect of DMDO on the formation of the solid electrolyte interface (SEI) on anode and cathode of MCMB/LiNi_0.8Co_0.2O₂ cells was investigated via a combination of electrochemical methods, X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations. It is found that cells with electrolyte containing 2% DMDO have better capacity retention than cells without DMDO and this improved performance is ascribed to the assistance of DMDO in forming better SEIs on anode and cathode. DMDO-decomposition products are identified experimentally on the surface of the anode and cathode and supported by theoretical calculations.

4,5-二甲基-[[1,3]二氧杂-2-酮（DMDO）被用作锂离子电池的新型电解质添加剂。结合电化学方法，X射线光电子能谱（XPS）和密度泛函理论研究了DMDO对MCMB / LiNi _0.8 Co _0.2 O ₂电池阳极和阴极上固体电解质界面（SEI）形成的影响。（DFT）计算。发现具有含2％DMDO的电解质的电池比没有DMDO的电池具有更好的容量保持性，并且这种改善的性能归因于DMDO在阳极和阴极上形成更好的SEI的帮助。DMDO分解产物在阳极和阴极的表面上进行了实验鉴定，并得到了理论计算的支持。