Tavorite-like structure LiFePO₄F has been recently studied as potential alternative cathode materials for lithium-ion batteries due to its outstanding structural stability, abundant resources and remarkable safety. However, its poor electronic conductivity and lithium-ion diffusion coefficient leads to the unsatisfactory cycling stability and rate capabilities of LiFePO₄F. Herein, Ag decorated LiFePO₄F nanospheres have been synthesized for the first time via a precipitation method with in-situ reduction of Ag⁺, simultaneously improving electronic conductivity and lithium-ion diffusion coefficient. The Ag nanoparticles with size of ∼10 nm are in-situ grown on the surface of LiFePO₄F nanospheres with impressive electrochemical performance. It delivers a high discharge capacity of 148.7 mAh g⁻¹ (very close to the theoretical capacity of 152 mAh g⁻¹) at 0.1 C. It is worth mentioning that the Ag-decorated LiFePO₄F nanospheres reveal superior cycling stability. The initial discharge capacities of Ag-decorated LiFePO₄F reaches up to 120.3 mAh·g⁻¹ at 0.5 C, and the capacity retention is as high as 96.1% after 300 cycles, which is remarkable higher than that of pure LiFePO₄F nanospheres with initial discharge capacity of 110.2 mAh·g⁻¹ and capacity retention of 83.1% after 300 cycles. Furthermore, the Ag-decorated LiFePO₄F displays the average discharge potential loss of only 0.7% which is lower than pure LiFePO₄F of 4.7% after 300 cycles, and the corresponding specific energy retention ratio of 95.5% which is higher than that of 80.1%.

由于其出色的结构稳定性，丰富的资源和显着的安全性，最近已研究了类似铁钛矿结构的LiFePO ₄ F作为锂离子电池的潜在替代正极材料。然而，其差的电导率和锂离子扩散系数导致LiFePO ₄ F的循环稳定性和倍率性能不理想。本文首次通过原位还原沉淀法合成了装饰有Ag的LiFePO ₄ F纳米球。Ag ⁺，同时提高电子电导率和锂离子扩散系数。在LiFePO的表面上原位生长尺寸约为10 nm的Ag纳米颗粒₄ F纳米球具有令人印象深刻的电化学性能。它在0.1 C时可提供148.7 mAh g ^-1的高放电容量（非常接近理论值152 mAh g ^-1）。值得一提的是，用Ag修饰的LiFePO ₄ F纳米球具有出色的循环稳定性。用Ag修饰的LiFePO ₄ F在0.5 C时的初始放电容量达到120.3 mAh·g ^-1，经过300次循环后容量保持率高达96.1％，明显高于纯LiFePO ₄ F纳米球。300次循环后的初始放电容量为110.2mAh·g ^-1，容量保持率为83.1％。此外，用银装饰的LiFePO₄ F显示300次循环后的平均放电电势损失仅为0.7％，低于纯LiFePO ₄ F的4.7％，并且相应的比能量保持率为95.5％，高于80.1％。