All-Solid-State Li-Ion Battery Using Li1.5Al0.5Ge1.5(PO4)3 As Electrolyte Without Polymer Interfacial Adhesion
Journal
The Journal of Physical Chemistry C
Date Issued
2018
Author(s)
Abstract
Solid-state lithium-ion batteries are promising candidates for energy storage devices that meet the requirements to reduce CO2 emissions. NASICON-type solid-state electrolytes (SSE) are most promising materials as electrolytes for high-performance lithium ion batteries because of their good stability and high ionic conductivity. In this study, we successfully fabricate NASICON-based Li1.5Al0.5Ge1.5(PO4)3 lithium fast-ion conductors through melt-quenching with post-crystallization. The effect of crystallization temperature on the structure of LAGP and their ionic conductivity is systematically studied using Rietveld analysis of Synchrotron X-ray powder diffraction patterns, multinuclear magnetic resonance, and electrochemical analysis, revealing that the mobility of Li ion is dependent on crystallization temperature. The glass-ceramic LAGP annealed at 800 °C for 8 h exhibits the highest conductivity of 0.5 mS cm-1 at room temperature. Moreover, we report the viability of the prepared LAGP glass-ceramic as a solid electrolyte in Li-ion batteries without polymer adhesion. The cycling of Li/LAGP/LFP all-solid-state cell, provides a stable cycling lifetime of up to 50 cycles. This approach demonstrates that LAGP glass-ceramic can have good contact with the electrodes without interfacial layer and can deliver a reasonable discharge capacity after 50 cycles. © 2018 American Chemical Society.
SDGs
Other Subjects
Adhesion; Aluminum compounds; Electric discharges; Germanium compounds; Glass ceramics; Ionic conduction in solids; Ionic conductivity; Ions; Lithium compounds; Lithium-ion batteries; Rietveld analysis; X ray powder diffraction; Crystallization temperature; Discharge capacities; Electrochemical analysis; High-performance lithium-ion batteries; Interfacial adhesions; Solid state lithium ion battery; Solid-state electrolyte; Synchrotron X ray powder diffraction; Solid electrolytes
Publisher
American Chemical Society ({ACS})
Type
journal article