To enhance the comprehensive utilization of agricultural waste in new energy materials, sulfur/nitrogen dual-doped porous C/SiO_x composites (SN@C/SiO_x) are successfully prepared via a facile and economical method. In this approach, rice husks are used as the C and Si source and thiourea as the S and N source. This SN@C/SiO_x composite possesses a high specific surface area and SiO_x particles are evenly distributed in the S/N-doped C matrix. The S/N-doped C matrix not only improves electrical conductivity and impedes the agglutination of particles, but also buffers the volume variation of SiO_x, achieving enhanced electrochemical properties. As a lithium-ion battery (LIBs) anode, the as-synthesized SN@C/SiO_x composite delivers an impressive specific capacity (1150 mAh/g) and enhanced initial coulombic efficiency (CE) of 70.4%. Even at a large current density of 1.0 A/g, the reversible capacity remains 632 mAh/g after 1200 cycles. This doping carbonization strategy offers the potential for using rice husks in the development of high-performance lithium ion batteries.

为提高农业废弃物在新能源材料中的综合利用，通过简便，经济的方法成功制备了硫/氮双掺杂多孔C / SiO _x复合材料（SN @ C / SiO _x）。在这种方法中，稻壳用作C和Si来源，硫脲用作S和N来源。这种SN @ C / SiO _x复合材料具有较高的比表面积，并且SiO _x颗粒均匀分布在S / N掺杂的C基体中。掺S / N的C基体不仅提高了电导率并阻止了颗粒的凝集，而且还缓冲了SiO _x的体积变化，从而实现了增强的电化学性能。作为锂离子电池（LIB）阳极，合成后的SN @ C / SiO_x复合材料具有令人印象深刻的比容量（1150 mAh / g），初始库仑效率（CE）提高了70.4％。即使在1.0 A / g的大电流密度下，在1200次循环后，可逆容量仍保持632 mAh / g。这种掺杂碳化策略为开发高性能锂离子电池提供了使用稻壳的潜力。