Abstract
Spark plasma sintering (SPS) has been successfully used to produce all-solid-state lithium-ion batteries (ASSLibs). Both regular and functionally graded electrodes are implemented into novel three-layer and five-layer battery designs together with solid-state composite electrolyte. The electrical capacities and the conductivities of the SPS-processed ASSLibs are evaluated using the galvanostatic charge-discharge test. Experimental results have shown that, compared to the three-layer battery, the five-layer battery is able to improve energy and power densities. Scanning electron microscopy (SEM) is employed to examine the microstructures of the batteries especially at the electrode–electrolyte interfaces. It reveals that the functionally graded structure can eliminate the delamination effect at the electrode–electrolyte interface and, therefore, retains better performance.
Highlights
As the use of rechargeable electronic devices has expanded, the need for improvements in energy density, power capacity, and product safety has continued to rise
The present study aims at investigating the effect of regular and functionally graded electrodes on the power density and the interface quality of all-solid-state lithium-ion batteries (ASSLibs) produced by the spark plasma sintering (SPS) technique
The ability of SPS to fabricate functionally graded components of all-solid-state Lithium-ion batteries has been investigated in the present study
Summary
As the use of rechargeable electronic devices has expanded, the need for improvements in energy density, power capacity, and product safety has continued to rise. Li-ion batteries with solid electrolyte are designed to solve above-mentioned issues because they do not need to contain any liquids They can be integrated into the support of the overall product design because they have higher structural stability and they can be used in a much wider temperature range. Substituting Al for Ti in LTP forms Li1+x Alx Ti2−x (PO4 ) (LATP) This doped composite has higher ionic conductivity, lower sintering temperature, and higher crystalline stability than the un-doped one [19,20,21] and is stable against moisture [22,23]. The SPS-processed batteries were subjected to galvanostatic charge-discharge and electrical conductivity tests to determine the effect of electrode compositions on the relative energy and power density. Microstructural analyses were conducted to examine the electrolyte–electrode interfaces as the battery structure changed in correspondence to the evolution of its electrical properties
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