The high-yield, low-quality issue in the mainstream ball milling production process of silicon-carbon anodes is a major barrier hindering the commercialization of silicon-based batteries. Utilizing biomedical Microjet technology, this research aimed to produce high-quality multilayer graphene in a simple, cost-effective, and environmentally friendly way, in conjunction with the ball milling process for silicon-based anode production to overcome its challenges. By utilizing Microjet-assisted ball milling, the graphene-supported carbon-coated silicon anode (Gr/Si@C) was synthesized. The amorphous carbon shell and graphene framework synergistically reduce Si volume expansion, prevent electrolyte decomposition, control Solid Electrolyte Interphase (SEI) growth, and improve Li-ion migration. Compared to Si@C without graphene support as filler in a single ball milling process, Gr/Si@C demonstrated an initial Coulombic efficiency (ICE) of 92.97% and 1622 mAh g −1 at 1/3C (∼0.7A g −1 ), indicating a 17% increase in -ICE and a 48% increase in capacity. The NCM811//(Gr/Si@C) pouch cell delivered 7.0 mAh cm −2 of areal capacity and 310 Wh kg −1 of energy density, outperforming -certain commercial batteries. This innovative cross-disciplinary approach not only addresses the problem of high-yield, low-quality ball-milled silicon carbon anodes inexpensively, but it also leads the way in applying biomedical Microjet technology to cost-effective graphene.
Cao et al. (Mon,) studied this question.