质谱技术与电化学方法相结合，能原位或在线检测电化学反应的中间产物和最终产物，利于深入研究电极反应机理. 本文结合作者应用电化学质谱研究锂-氧电池反应机理的科研背景，综述了目前该技术在研究锂-氧电池体系中的电解液、电极材料和催化剂的进展情况，此外还介绍了电池体系中的不可逆副反应对电池充放电过程的影响.

Mass Spectrometry, coupled with electrochemistry, is a powerful research tool to study mechanisms for a broad range of electrode reactions by identifying and quantifying reaction products and intermediates. In this review, we summarize the recent advances in the Li-O₂ battery researches offered by electrochemical mass spectrometry based on our group investigations. These include the research progresses in electrolytes, cathode materials (electrocatalysts), and parasitic reactions, i.e., the key issues associated with Li-O₂ research. In addition, we also discuss the effects of irreversible side reactions involved in battery systems on charge and discharge processes.