Siqi Lyu , Kai-Lun Zhang , Yaoda Xin , Na Li , Xiao-Hua Guo , Zhen Liang , Yannan Zhang , Hao-Sen Chen , Wei-Li Song
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Comparison of monitoring gas evolution in commercial Li-ion batteries: Differential electrochemical mass spectrometry versus operando internal non-destructive gas sensors
Lithium-ion batteries (LIBs) face capacity degradation and safety risks from internal gas evolution. This study compares differential electrochemical mass spectrometry (DEMS) and in-situ non-dispersive infrared (NDIR) gas sensors for monitoring gas in graphite/NMC811 batteries. DEMS enables real-time gas detection but relies on carrier gases and causes 49.7 % capacity loss in small cells. NDIR sensors in 800 mAh pouch cells offer continuous, non-destructive monitoring with <1 % capacity loss, detecting gas accumulation and consumption. NDIR proves robust for operando gas monitoring in high-capacity LIBs, aiding failure mechanism analysis and safety improvement.
期刊介绍:
Chemical Physics Letters has an open access mirror journal, Chemical Physics Letters: X, sharing the same aims and scope, editorial team, submission system and rigorous peer review.
Chemical Physics Letters publishes brief reports on molecules, interfaces, condensed phases, nanomaterials and nanostructures, polymers, biomolecular systems, and energy conversion and storage.
Criteria for publication are quality, urgency and impact. Further, experimental results reported in the journal have direct relevance for theory, and theoretical developments or non-routine computations relate directly to experiment. Manuscripts must satisfy these criteria and should not be minor extensions of previous work.