Printable and Free-standing Silicon-based Anode for Current Collector-free Li-ion Batteries
발표자
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초록
내용
Silicon (Si)-based materials, suitable for high-energy-density applications, have been restricted in practical use due to their inherent structural instability and poor conductivities upon electrochemical cycling. Here, we propose a fully printable and free-standing anode, composed of hollow SiOx/C (H-SiOx/C) composite material and MXene conductive binder, exhibiting high specific capacity, structural reliability, and superior ionic conductivity without any current collector. The hollow structure of H-SiOx/C accommodates volume changes during cycling, while the MXene binder forms a three-dimensional interconnected conducting structure for maintaining the structural integrity of electrodes without a current collector. Furthermore, the printability and freestanding nature of the H-SiOx/C/MXene anode are validated in both coin-type full-cell and heart-shaped pouch-cell configurations through a straightforward stencil printing technique.