Ni-rich LiNi_xCo_yMn_1−x−yO₂/graphite batteries with Ni ≥ 0.8 have aroused great interest in high-energy–density Li-ion batteries. However, their practical applications still face huge challenges owing to severe capacity fading on unstable cathodic solid electrolyte interfaces (SEI). Herein, we propose an advanced electrolyte additive, tri(2-furyl)phosphine (FuP), to induce the simultaneous formation of robust SEI films on cathode and anode surfaces. This interphase can significantly improve the cyclability of commercial LiNi_0.8Co_0.1Mn_0.1O₂/graphite pouch cells at 45 °C and reduce cell impedance during cycling. The capacity retention rate of the cells with the FuP-based electrolyte can reach 90 % after 600 cycles, which is considerably better than that of baseline batteries (70 %). Mechanistic studies indicate that FuP suppresses the formation of fragile Li₂CO₃ to generate more stable LiF, Li_xPO_yF_z, and additional organic phosphorus species on the electrode surface, thereby preventing cation disorder and irreversible phase transitions. These results provide a facile and efficient strategy for enhancing the performance of Ni-rich Li-ion batteries.

Ni ≥ 0.8的富镍 LiNi _x Co _y Mn _1−x−y O ₂ /石墨电池引起了人们对高能量密度锂离子电池的极大兴趣。然而，由于不稳定的阴极固体电解质界面（SEI）上的严重容量衰减，它们的实际应用仍然面临巨大挑战。在此，我们提出了一种先进的电解质添加剂三（2-呋喃基）膦（FuP），以诱导在阴极和阳极表面同时形成坚固的 SEI 膜。_{该界面可以显着提高商业 LiNi 0.8} Co _0.1 Mn _0.1 O ₂的循环性能/石墨软包电池在 45 °C 并降低循环过程中的电池阻抗。采用 FuP 基电解液的电池在 600 次循环后容量保持率可达 90%，明显优于基准电池（70%）。_{机理研究表明，FuP 可抑制易碎的 Li 2} CO ₃的形成，从而在电极表面生成更稳定的 LiF、Li _x PO _y F _{z和其他有机磷物质，从而防止阳离子紊乱和不可逆相变。}这些结果为提高富镍锂离子电池的性能提供了一种简便有效的策略。