Arginine Interfacial Regulation Strategy for Enhanced Cycling Stability of SiOx Anodes

In Li‖SiOx/arginine half-cells, the capacity retention at 0.5C remains close to 100% after 100 cycles, whereas the unmodified SiOx electrode decays to 498.3 mAh·g-1, demonstrating substantially enhanced cycling stability. At 2C, the arginine-coated electrode delivers a high specific capacity of 576.38 mAh·g-1. Further morphological analysis reveals that the electrode swelling ratio decreases from 95.6% to 34.7%, confirming improved structural integrity.

Overall, this work provides a new route for constructing a stable SEI on SiOx anodes and offers a simple yet effective solution for developing high-performance silicon-based lithium-ion batteries.