Abstract:

Lithium-ion batteries have served as efficient energy storage devices over the past decades, significantly influenced modern lifestyles through their applications in electric vehicles, drones, and portable electronics. However, their limited energy density and flammability have recently driven researchers to explore the field of lithium-metal based solid-state-battery, where inflammable solid electrolyte plays a crucial role. Among various types of solid electrolytes, composite polymer electrolytes and sulfide electrolytes are regarded as the most promising candidates for next-generation applications. While a critical issue that impedes the development of composite polymer electrolyte is the non-uniform dispersion of the ceramic and organic phase, which notably limits both their mechanical properties and ionic conductivity. The ‘grafting’ technique was a popular solution to this issue. But it only partially mitigates the agglomeration problem with compromising of optimal conductivity. Herein, a new method is proposed to use porous polymer framework as natural traps and to grow inorganic ceramics in-situ within these pores. Efficient utilization of these polymer-ceramics conducting interfaces would lead to remarkable improvement in conductivity and energy density. This strategy offers new insights into efficient design of composite polymer electrolyte and realizing safe next-generation solid state electrolyte.

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