Back to Search Start Over

Constructing a PVDF-based composite solid-state electrolyte with high ionic conductivity Li6.5La3Zr1.5Ta0.1Nb0.4O12 for lithium metal battery.

Constructing a PVDF-based composite solid-state electrolyte with high ionic conductivity Li6.5La3Zr1.5Ta0.1Nb0.4O12 for lithium metal battery.

Authors :
Song, Xin
Zhang, Tianhang
Huang, Saifang
Mi, Jinshuo
Zhang, Yudong
Travas-Sejdic, Jadranka
Turner, Adrian Peter
Gao, Wei
Cao, Peng
Source :
Journal of Power Sources. Apr2023, Vol. 564, pN.PAG-N.PAG. 1p.
Publication Year :
2023

Abstract

A high-safety composite solid-state electrolyte (CSSE) was constructed by embedding the high ionic conductivity garnet type Li 6.5 La 3 Zr 1.5 Ta 0.1 Nb 0.4 O 12 (LLZTNO) powder into a polyvinylidene fluoride (PVDF) matrix. The ionic conductivity of the CSSE containing 10% LLZTNO could reach 1.05 × 10−4 S cm−1, and the electrochemical window was extended to 4.80 V vs Li/Li+. In addition, the evolution and composition of the SEI layer were characterized by in-situ optical microscopic observation, X-ray photoelectron spectroscopy and cryogenic electron microscopy (cryo-EM). When paired with an NCM811 cathode, the batteries showed good rate cycling performance, and the discharge capacity could be maintained at 137.1 and 91.2 mAh g−1 at 0.3C and 2C after 80 and 100 cycles. The needle penetration test further demonstrated superior safety and potential applications of the PVDF-based room-temperature CSSE batteries. • A composite solid-state electrolyte with high ionic conductivity was developed. • It demonstrates a wide electrochemical window and excellent cycling performance. • The characteristics of SEI were identified by cryogenic TEM. • The Li metal battery assembled from the composite electrolyte show excellent safety. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
03787753
Volume :
564
Database :
Academic Search Index
Journal :
Journal of Power Sources
Publication Type :
Academic Journal
Accession number :
162324183
Full Text :
https://doi.org/10.1016/j.jpowsour.2023.232849