Equipped with a fully lithiated cathode with a bare anode current collector, the anode-free lithium cell architecture presents remarkable advantages in terms of both energy density and safety compared with conventional lithium-ion cells. However, it is challenging to realize high Li reversibility, especially considering the limited Li reservoir (typically zero lithium excess) in the cell configuration. In this study we have introduced Li₂O as a preloaded sacrificial agent on a LiNi_0.8Co_0.1Mn_0.1O₂ cathode, providing an additional Li source to offset the irreversible loss of Li during long-term cycling in an initial-anode-free cell. We show that O₂⁻ species, released through Li₂O oxidation, are synergistically neutralized by a fluorinated ether additive. This leads to the construction of a LiF-based layer at the cathode/electrolyte interface, which passivates the cathode surface and restrains the detrimental oxidative decomposition of ether solvents. We have achieved a long-life 2.46 Ah initial-anode-free pouch cell with a gravimetric energy density of 320 Wh kg^–1, maintaining 80% capacity after 300 cycles.

与传统的锂离子电池相比，无阳极锂电池结构配备了带有裸阳极集电器的全锂化阴极，在能量密度和安全性方面均具有显着优势。然而，实现高锂可逆性具有挑战性，特别是考虑到电池配置中有限的锂储层（通常零锂过量）。在这项研究中，我们在 LiNi _0.8 Co _0.1 Mn _0.1 O ₂正极上引入了 Li ₂ O 作为预负载牺牲剂，提供了一个额外的锂源来抵消在初始无负极长期循环过程中锂的不可逆损失。细胞。我们证明 O ₂ ^-通过 Li ₂ O 氧化释放的物质被氟化醚添加剂协同中和。这导致在阴极/电解质界面处构建基于 LiF 的层，从而钝化阴极表面并抑制醚溶剂的有害氧化分解。我们实现了长寿命的 2.46 Ah 无初始阳极软包电池，重量能量密度为 320 Wh kg ^–1，循环 300 次后仍保持 80% 的容量。