Silicon-carbon composite is recognized as one of the most promising anodes for high-energy lithium-ion batteries. In this work, a kind of sub-micro-sized silicon (Si) recycled from solar cell industrial cutting waste has been explored as lithium-ion battery anode through a simple compound process. Coated and bound by chitosan pyrolyzed hard carbon, the Si particles (most) were distributed in graphite particles in a balanced way to form silicon-graphite-carbon (SCG) composite. Hence, as-prepared SCG anode delivers a stable cycling performance, with a reversable capacity of 741 mAh g⁻¹ at 100 mA g⁻¹ after 400 cycles and retention of 98.8%. In addition, that the slower electrolyte penetration phenomenon for chitosan derived hard carbon anode plus SCG anode has been found, should and can be modified by pre-activation. The better stability as well as higher rate capability (587 mAh g⁻¹ at 400 mA g⁻¹) of SCG anode proved that the strategy of hard carbon as a glue while graphite as main frame structure works on making up defects of sub-micron Si. The remarkable cycling performances and low-cost manufacturing process make Si particles of larger size also show important commercial application values.

硅碳复合材料被公认为是高能锂离子电池最有希望的阳极之一。在这项工作中，通过简单的复合工艺，已经探索了一种从太阳能电池工业切削废料中回收的亚微米级硅（Si）作为锂离子电池阳极。被壳聚糖热解硬碳覆盖并结合后，Si颗粒（大部分）以平衡的方式分布在石墨颗粒中，从而形成了硅-石墨-碳（SCG）复合材料。因此，所制备的阳极SCG提供了一个稳定的循环性能，具有741毫安g的可逆式容量^-1在100mA克^-1经过400次循环，保留率达到98.8％。另外，已经发现壳聚糖衍生的硬碳阳极加SCG阳极的电解质渗透现象较慢，应该并且可以通过预活化进行改性。SCG阳极具有更好的稳定性和更高的倍率能力（在400 mA g ^-1时为587 mAh g ^-1），证明了硬碳作为胶水而石墨作为主框架结构的策略有效地弥补了亚微米缺陷。硅。出色的循环性能和低成本的制造工艺使较大尺寸的Si颗粒也显示出重要的商业应用价值。