Materials science breakthroughs promise enhancements in energy storage and environmental monitoring. Researchers developed a MoS2/nitrogen-doped carbon composite exhibiting high efficiency as a lithium-ion battery anode, addressing demands for durable energy storage. Separately, a self-supported Fe-Co/NF electrode advances sensitive electrochemical detection for nitrite, a critical environmental pollutant. These innovations underpin emerging clean energy and sensor technologies crucial for sustainability agendas.