Highly Stable Porous Polyimide Sponge as a Separator for Lithium-metal Secondary Batteries.

ABSTRACT: To inhibit Li-dendrite growth on lithium (Li)-metal electrodes, which causes capacity deterioration and safety issues in Li-ion batteries, we prepared a porous polyimide (PI) sponge using a solution-processable high internal-phase emulsion technique with a water-soluble PI precursor solution; the process is not only simple but also environmentally friendly. The prepared PI sponge was processed into porous PI separators and used for Li-metal electrodes. The physical properties (e.g., thermal stability, liquid electrolyte uptake, and ionic conductivity) of the porous PI separators and their effect on the Li-metal anodes (e.g., self-discharge and open-circuit voltage properties after storage, cycle performance, rate capability, and morphological changes) were investigated. Owing to the therma

SUBMITTER: Choi J 

PROVIDER: S-EPMC7600698 | biostudies-literature | 2020 Oct

REPOSITORIES: biostudies-literature