The Fabrication of All-Solid-State Lithium-Ion Batteries via Spark Plasma Sintering

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.

Optimization of sintering process on Li1+Al Ti2-(PO4)3 solid electrolytes for all-solid-state lithium-ion batteries

“…Identically, the capacity decay of 1 st to 100 th cycle was only 7%, but the capacity decreasing of 100 th to 200 th cycle and 200 th to 300 th cycle was 10% and 13%, respectively. The final capacity at 360 th cycle was 16.7mAh, which was 63.2% of the first cycle. The 0.5C discharging curves show similar voltage plateau from 1 st to 100 th cycle but obvious decay of working voltage from 100 th to 300 th cycle as demonstrated in Fig.…”

“…In addition, LTP has proved to be an adaptable material, with use as an effective electrolyte not only in all-solid-state lithium-ion batteries (ASSLBs) [16][17][18], but also in lithium-air [19,20] and lithium-sulfide systems [21]. NASICON-type LiTi2(PO4)3 forms with a rhombohedral structure composed of octahedral TiO6 which corner-share with tetrahedral PO4.…”

Digital Printing of Solid‐State Lithium‐Ion Batteries

“…Thus, with SLA, it may be possible to avoid formation of disfavorable resistive interfacial phases even if they are the thermodynamically favorable species. Demonstrations of the benefits of field‐assisted sintering for lithium‐ion‐conducting ceramic electrolytes have been shown through spark plasma sintering …”

Spark Plasma Sintering of Lithium Aluminum Germanium Phosphate Solid Electrolyte and its Electrochemical Properties

“…First, the high stability of LAGP SSEs against O 2 and H 2 O means that the synthesis of materials and the assembly of batteries could be performed in an ambient atmosphere, therefore simplifying the manufacturing processes and requirements [3,4,5]. Secondly, the predominant ionic conductivities of LAGP SSEs are in the order of 10 −3 –10 −5 S cm −1 at room temperature (RT), which are relatively high compared with other ceramic electrolytes [29,30]. Thirdly, LAGP SSEs exhibit a large electrochemical stability window (1.8−7 V vs. Li + /Li), good chemical compatibility with cathode materials at different charge states, and excellent interfacial stability towards Li metal anode [6,31,32].…”

“…Compared to the conventional heat treatment, the effective heating and cooling systems in SPS enhanced the densification of SSE powders through grain diffusion mechanisms and avoided grain coarsening to maintain the intrinsic merits of nano-powders [37,38]. Indeed, SPS technique, with the advantages of a flash and short processing time, improves the sintering ability of various powder materials and creates intimate solid–solid interfaces in solid electrolytes and electrodes for ASSLIBs [30,39].…”