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Experimental study demonstrates thin-film-like capacity in spray-deposited silicon nanoparticle anodes, suggesting a scalable pathway toward high-performance solid-state batteries.
This paper reports the electrode performance of a Si anode composed of nanoparticles prepared by spray deposition in a solid-state cell. Upon lithiation, the Si nanoparticles undergo volume expansion, structural compaction, and appreciable coalescence in the confined space between the solid electrolyte layer and current collector in the solid-state cell to form a continuous film similar to that fabricated by the evaporation process. Hence, the particulate anode exhibited excellent performance, previously observed only in thin-film systems. The anode prepared by the scalable process delivers 2655 mAh g –1 even at a high discharge current density of 5.48 mA cm –2 (24C).
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Ohta et al. (2019) studied this question.
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