In-situ study of lithium insertion on the electrochemical-mechanical coupling behavior of graphite composite electrodes

Energy Materials, Год журнала: 2025, Номер 5(6)

Опубликована: Фев. 25, 2025

Graphite has long served as one of the most commonly used anode materials in lithium-ion batteries, where its electrochemical-mechanical coupling performance is critical for maintaining structural stability and extending cycle life. This study investigates evolution characteristics graphite electrodes during electrochemical cycling. Experiments were performed using situ curvature testing, combined with X-ray Diffraction analysis. A physical model was created to analyze variations curvature, Young's modulus, strain, partial molar volume composite electrodes. The results indicate that modulus elasticity augments concentration lithium ions lithiation. Additionally, undergoes periodic changes state charge. In-situ experiments revealed lithiation phase transformation process graphite. interlayer spacing calculated by tracking (001) (002) diffraction peaks, which verified accuracy cycle. further elucidates mechanisms intercalation volumetric active material within anode.

Язык: Английский

Fabrication of Ge/TiO2/C composite with oxygen vacancies as anode material for Li-ion batteries

Ceramics International, Год журнала: 2025, Номер unknown

Опубликована: Май 1, 2025

Язык: Английский