The large volume expansion and poor conductivity leading to the deterioration of electrochemical performance, is a significant challenge for Si-anode materials for practical applications. Previous researches have indicated that introducing a TiSi₂ buffer with high conductivity to form Si/TiSi₂ composites can effectively improve the electrochemical performance of Si anode. However, the facile and low-cost synthesis of Si/TiSi₂ composites remains challenging. In this study, we propose a novel approach to preparing Si/TiSi₂ composites as anode materials for lithium-ion batteries by coupling photovoltaic (PV) silicon waste (simulated using inexpensive low-purity Si (98.8%) in experiments) and metallurgical waste (Ti-bearing blast furnace slag, TBBFS) via a new method combining induction melting and mechanical ball milling. A series of Si/TiSi₂ materials were obtained using different ratios of raw materials and investigated using SEM, TEM, XRD, XPS and electrochemical performance tests. The results show that TiSi₂ not only acts as a buffer for the bulk expansion of Si, but also improves the electrical conductivity; therefore, the Si/TiSi₂ materials exhibit enhanced cycling stability when more TiSi₂ is introduced. The sample prepared using a low-purity Si and TBBFS with a mass ratio of 1:3 delivered a reversible capacity of 530 mAh g⁻¹ after 200 cycles at a charge-discharge current density of 800 mA g⁻¹. This work not only provides a new strategy and technology for introducing TiSi₂ into Si-based anode materials, but also provides a green and sustainable technical route for the high value-added recycling of Ti-bearing blast furnace slag.

大体积膨胀和差的电导率导致电化学性能的恶化，对于实际应用的硅阳极材料是一个重大挑战。已有研究表明，引入高导电率的TiSi ₂缓冲液形成Si / TiSi ₂复合材料可以有效提高Si阳极的电化学性能。然而，Si / TiSi ₂复合材料的简便且低成本的合成仍然具有挑战性。在这项研究中，我们提出了一种制备Si / TiSi ₂的新颖方法通过结合一种新方法结合使用光伏（PV）硅废料（在实验中使用廉价的低纯度Si（98.8％进行模拟））和冶金废料（含钛高炉矿渣，TBBFS）将复合材料用作锂离子电池的负极材料感应熔炼和机械球磨。使用不同的原料比例获得了一系列Si / TiSi ₂材料，并使用SEM，TEM，XRD，XPS和电化学性能测试进行了研究。结果表明，TiSi ₂不仅可以作为硅块体膨胀的缓冲剂，而且可以提高导电性。因此，当更多的TiSi ₂时，Si / TiSi ₂材料表现出增强的循环稳定性介绍。使用质量比为1：3的低纯度Si和TBBFS制备的样品在200个循环后以800 mA g ^-1的充放电电流密度提供了530 mAh g ^-1的可逆容量。这项工作不仅为将TiSi ₂引入硅基阳极材料提供了新的策略和技术，而且为含钛高炉渣的高附加值回收提供了绿色和可持续的技术路线。