Study on Stability of Antimony Carbon Anode of Lithium-ion Battery under Compressive Loading

Abstract

Antimony carbon composite was used as active materials in the anode to assemble button lithium-ion batteries (LIBs), and quasi-static plate and contact (steel balls) extrusion loading experiments were carried out. The cycling stability, crack morphology of electrode, and failure of LIBs were investigated. The results indicate the quasi-static plate and contact (steel balls) extrusion load cause the decrease of reversible capacity, and the reversible capacity loss is positively correlated with quasi-static plate and contact load compression load, which can be attributed to increased width of cracks and peeling off of active materials with increasing compression load in the range of 0-960 N. In addition, the contact compression load causes lagre reversible capacity decrease and poor cycling performance, which can be related to large cracks, concave area, and fracture on the electrode formed under contact compression load. The quasi-static plate load causes little reversible capacity loss and no obvious decease of cycling performance, which is attributed to the protective effect of the battery shell. These conclusions provide a reference for the failure study of antimony carbon anode materials under mechanical load.

Keywords

• lithium-ion battery
• antimony carbon anode
• quasi-static plate load
• contact load