Phenylboronic Acid Functionalized Calix[4]pyrrole-Based Solid-State Supramolecular Electrolyte.
basic_science · Level V
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- Record sourced from PubMed, PMID 37885345.
- Also identified by DOI 10.1002/adma.202308507.
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Abstract
Solid-state polymer electrolytes (SPEs) suffer from the low ionic conductivity and poor capability of suppressing lithium (Li) dendrites, which limits their utility in the preparation of all solid-state Li-metal batteries (LMBs). It is reported here a flexible solid supramolecular electrolyte that incorporates a new anion capture agent, namely a phenylboronic acid functionalized calix[4]pyrrole (C4P), into a poly(ethylene oxide) (PEO) matrix. The resulting solid-state supramolecular electrolyte demonstrates high ionic conductivity (1.9 × 10<sup>-3</sup> S cm<sup>-1</sup> at 60 °C) and a high Li<sup>+</sup> transference number ( <math xmlns="http://www.w3.org/1998/Math/MathML"> <semantics><msub><mi>t</mi> <msup><mi>Li</mi> <mo>+</mo></msup> </msub> <annotation>${t}_{{\mathrm{Li}}^{\mathrm{ + }}}$</annotation></semantics> </math> = 0.70). Furthermore, the assembled Li|C4P-PEO-LiTFSI|LiFePO<sub>4</sub> cell allows for stable cycling over 1200 cycles at 1 C at 60 °C, as well as good rate performance. The favorable performance of the C4P-PEO-LiTFSI SPE leads to suggest it can prove useful in the creation of high energy density solid-state LMBs.