Optimizing Conductivities in Lithium Metal Batteries through a PEO-CMC Polymer Layer

초록

Lithium metal stands as a cornerstone for the evolution of battery technologies, distinguished by its unparalleled energy density and potential for prolonged energy storage. However, the journey towards the broad implementation of Lithium Metal Batteries (LMBs) encounters significant hurdles, with dendrite growth during lithium plating being particularly problematic. These issues undermine the durability, performance, and safety of the batteries and underscore the urgent demand for groundbreaking resolutions. In response, our study delineates a method to finely regulate both the ionic and electrical conductivities within LMBs to inhibit dendritic proliferation at the anode, utilizing a bespoke polymer protective layer derived from Polyethylene Oxide (PEO) and Carboxymethyl Cellulose (CMC). Our research has achieved an optimal enhancement of ionic conductivity and strategic control over electrical conductivity through meticulous adjustment of the PEO-CMC ratio. This dual approach promotes uniform lithium-ion deposition and effectively counters dendrite formation. The empirical data gathered affirm that a mass transfer system tailored to a specific blend ratio substantially curtails the emergence of lithium dendrites, thus significantly elevating the safety and functionality of LMBs. The revelations of this investigation substantially advance the domain of lithium metal battery technology, introducing an innovative methodology to boost the safety and longevity of energy storage systems. The inception of a PEO-CMC-based polymer protective layer system signifies a crucial breakthrough, accelerating the path toward the commercial viability of lithium-ion batteries and expanding their application across essential domains such as electric vehicle manufacturing and expansive energy storage solutions.