Cycle Issue and Failure Analysis of Li–N 2 Batteries

作者：Xingyu Ma, Yibo Ma, Houkang Sun, Houkang Sun, Hongjun Zhou, Hui Sun, Hui Sun · 发表于：ACS Sustainable Chemistry & Engineering · 年份：2025 · DOI：10.1021/acssuschemeng.4c09349 · 被引用次数：7 · 研究领域：Advancements in Battery Materials、Advanced Battery Materials and Technologies、Chemical Synthesis and Characterization

Li–N 2 is a subset of Li–air batteries, without a testing protocol. Porous graphene was employed as the cathode to study the cycling of Li–N 2 . The nitrogen reduction mechanism was revised to an electrochemical interaction between lithium and nitrogen. The role of the Li 3 N interface during cycling was discovered. Using in situ electrochemical impedance, the study discerns the instability of the interface formed during the initial cycles. An abnormal phenomenon that the discharge voltage platform rose after cycling prompts a detailed characterization of the interface evolution during the initial and subsequent cycles. In the later stage of the Li–N 2 battery, it seems that N 2 fixation no longer occurs due to the occurrence of side reactions. Finally, the study proposes preforming the cathode interface to improve cycling performance. The article sheds light on the challenges and opportunities for metal–N 2 batteries.