In:
Angewandte Chemie International Edition, Wiley, Vol. 63, No. 5 ( 2024-01-25)
Kurzfassung:
Solid‐state lithium (Li) batteries promise both high energy density and safety while existing solid‐state electrolytes (SSEs) fail to satisfy the rigorous requirements of battery operations. Herein, novel polyoxometalate SSEs, Li 3 PW 12 O 40 and Li 3 PMo 12 O 40 , are synthesized, which exhibit excellent interfacial compatibility with electrodes and chemical stability, overcoming the limitations of conventional SSEs. A high ionic conductivity of 0.89 mS cm −1 and a low activation energy of 0.23 eV are obtained due to the optimized three‐dimensional Li + migration network of Li 3 PW 12 O 40 . Li 3 PW 12 O 40 exhibits a wide window of electrochemical stability that can both accommodate the Li anode and high‐voltage cathodes. As a result, all‐solid‐state Li metal batteries fabricated with Li/Li 3 PW 12 O 40 /LiNi 0.5 Co 0.2 Mn 0.3 O 2 display a stable cycling up to 100 cycles with a cutoff voltage of 4.35 V and an areal capacity of more than 4 mAh cm −2 , as well as a cost‐competitive SSEs price of $5.68 kg −1 . Moreover, Li 3 PMo 12 O 40 homologous to Li 3 PW 12 O 40 was obtained via isomorphous substitution, which formed a low‐resistance interface with Li 3 PW 12 O 40 . Applications of Li 3 PW 12 O 40 and Li 3 PMo 12 O 40 in Li‐air batteries further demonstrate that long cycle life (650 cycles) can be achieved. This strategy provides a facile, low‐cost strategy to construct efficient and scalable solid polyoxometalate electrolytes for high‐energy solid‐state Li metal batteries.
Materialart:
Online-Ressource
ISSN:
1433-7851
,
1521-3773
DOI:
10.1002/anie.202317949
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
2024
ZDB Id:
2011836-3
ZDB Id:
123227-7
