In:
Angewandte Chemie, Wiley, Vol. 133, No. 34 ( 2021-08-16), p. 18596-18601
Abstract:
Large‐scale implementation of all‐solid‐state lithium batteries is impeded by the physical limitations of the interface between the electrode and solid electrolyte; specifically, high resistance and poor stability, as well as poor compatibility with Li + migration. We report double ionic–electronic transfer interface layers grown at electrode–electrolyte interfaces by in situ polymerization of 2,2′‐bithiophene in polyethylene oxide (PEO) electrolyte. For all‐solid‐state LiFePO 4 ∥PT‐PEO‐PT∥Li cells, the formation of a conductive polythiophene (PT) layer at the cathode–electrolyte interface resulted in an at least sevenfold decrease in interface resistance, and realized a capacity retention of about 94 % after 1000 cycles along with a lower polarization voltage under a rate of 2 C. The mixed ionic–electronic conductive layers imparted superior interface stability and contact while keeping good compatibility with the Li anode.
Type of Medium:
Online Resource
ISSN:
0044-8249
,
1521-3757
DOI:
10.1002/ange.v133.34
DOI:
10.1002/ange.202104183
Language:
English
Publisher:
Wiley
Publication Date:
2021
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