Solvent-free and large-scale synthesis of SiOx/C nanocomposite with carbon encapsulation for high-performance lithium-ion battery anodes
High-capacity SiO x anodes are fatally limited by poor electrical conductivity and huge volume fluctuations. Nano-engineering can effectively extend battery life, but achieving the transformation of nanostructures from laboratory synthesis to industrial mass production still remains a great challenge. Conventional synthetic routes are plagued by harsh conditions, complex processes, and especially low yields; even if they are adopted by industrial production, the large amounts of solvents in traditional wet chemical methods will pose a potential risk of pollution and energy waste. Herein, a solvent-free and mass-producible strategy is presented to prepare SiO x /C@C nanocomposite via solvent-free sol-gel, ball milling , and carbon coating process . The production exhibits favorable powder properties for conventional LIB fabrication technology, such as narrow particle size distribution , suitable specific surface area, as well as a high yield (40.5%). The prepared SiO x /C@C anode displays a high initial coulombic efficiency (71.4%) and reversible capacity (1279 mAh g −1 at 0.1 A g −1 ), and a great durability (80.08% capacity retention after 1000 cycles at 1.0 A g −1 ). Furthermore, the superior matching performance of SiO x /C@C//LiCoO 2 full-cell is also clearly demonstrated, especially the high energy density (347 Wh kg −1 ). This ingenious and scalable strategy will remarkably promote the commercialization of nanostructures.
危险品化学品经营许可证（带存储）