Composite materials containing Si as a component, are growing importance in the field of Li‐ion battery due to their extremely high theoretical capacity (3500 mAh g⁻¹ at room temperature). However, the capacity of Si anode material decays dramatically because of serious volume variation during lithiation and delithiation process, which lead to deformation of Si electrode and resulted in poor cycle performance. In the present work, we have reported improved performance of modified Si electrode as an anode in Li‐ion battery. Si obtained from kerf‐loss slurry have been alloyed with Ni nanoparticles to improve its conductivity. A mechanistic study of the deposition of LiPON with respect to deposition pressure also presented. It is seen that LiPON layer serves as a protective layer with high ionic conductivity (1.38×10⁻⁶ S cm⁻¹) to improve the electrochemical activity of Si−Ni electrode. The optimal 1^st charge capacity of LiPON modified‐ Si−Ni composite was 915 mAh g⁻¹ at a current density of 50 mA g⁻¹ in a potential window of 1.2 V to 0.005 V. The charge capacity retained 56.2% of the initial cycle after 90^th cycling measurement.

中文翻译：

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在用于锂离子电池的低等级复合硅基阳极上优化锂磷氧氮化物保护层的厚度

由于其极高的理论容量（3500 mAh g ^-1在室温下）。然而，由于在锂化和脱锂过程中体积的严重变化，导致硅阳极材料的容量急剧下降，从而导致硅电极变形并导致较差的循环性能。在目前的工作中，我们已经报道了改进的硅电极作为锂离子电池阳极的性能有所提高。从切缝损失浆液中获得的Si已与Ni纳米颗粒形成合金，以提高其导电性。还介绍了LiPON沉积相对于沉积压力的机理研究。可以看出，LiPON层用作具有高离子电导率（1.38×10 ^-6 S cm ^-1）的保护层，以改善Si-Ni电极的电化学活性。最佳1^日在1.2 V至0.005 V的电势窗口中，电流密度为50 mA g ^-1时，LiPON改性的Si-Ni复合材料的充电容量为915 mAh g ^-1。在^第90^次充电后，充电容量保留了初始循环的56.2％循环测量。