Performance and Degradation of Advanced Mobile Batteries: Future Prospects for Sustainable Battery Development

This research focuses on comparative analysis of battery health degradation in Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Po) and Silicon-Carbon (Si/C) battery chemistries for future mobile energy storage applications. The key degradation mechanisms, cycle durability, capacity retention, energy density, thermal performance and barriers to large scale adoption are explored. Although Li-Ion does not have the lowest weight or smallest form factor, it is the industry standard because of the existing manufacturing infrastructure, understanding of its degradation characteristics, and a typical cycle life of 1,000 to 2,000 cycles. Although Li-Po batteries offer versatility of shape, low weight and enhanced leakage resistance, they have limited application for high voltage because of the degradation of polymer electrolyte and the instability at the interfaces. While silicon based batteries (Si/C) have a much higher theoretical capacity and superior practical energy density, silicon expansion of greater than 300% causes particle fragmentation, loss of electrical contact, multiple formation of solid electrolyte interphase (SEI) and rapid capacity loss. In the real world, Samsung’s Si/C battery illustrates the importance of the capacity vs mechanical expansion vs cycle life vs reliability balance. Results show that the choice of an optimal battery technology is very application-specific. Advanced Si/C nanostructure engineering, prelithiation strategies, durable binder materials, next generation polymer electrolytes, scalable manufacturing processes, and AI-based battery management systems for enhanced lifetime performance and degradation prediction are the future research priorities.