Li₃N is an excellent zero-residue positive electrode pre-lithiation additive to offset the initial lithium loss in lithium-ion capacitors. However, Li₃N has an intrinsic problem of poor compatibility with commonly used aprotic polar solvents in electrode manufacture procedure due to its high reactivity with commonly used solvents like N-methy-2-pyrrolidone (NMP) and etc. It is the Valley of Death between research and large-scale commercialization of Li-ion capacitors using Li₃N as prelithiation agent. In this work, Li₃N containing electrode is prepared by a commercially adoptable route for the first time, using N,N-dimethylformamide (DMF) to homogenate the electrode slurry. The DMF molecular stabilizing mechanism is confirmed via experiment analysis and DFT simulation, indicating that the dehydrogenation energy for DMF is obviously larger than other commonly used solvents such as NMP and etc. The soft package lithium-ion capacitors (LIC250) with only 12 wt% Li₃N addition in AC positive electrode exhibits excellent rate capability, cyclic stability and ultrahigh specific energy. Its specific energy is 2.3 times higher than the Li₃N-free devices, with energy retention as high as 90% after 10,000 cycles.

Li ₃ N是一种出色的零残留正电极预锂化添加剂，可抵消锂离子电容器中的初始锂损失。然而，Li ₃ N固有的问题是在电极制造过程中与常用的非质子极性溶剂相容性差，这是因为其与常用的溶剂（如N-甲基-2-吡咯烷酮（NMP）等）具有很高的反应性。使用Li ₃ N作为预锂化剂的锂离子电容器的研究与大规模商业化之间的死亡。在这项工作中，黎₃含N电极通过首次商业上可采用的路线制备，其中使用Ñ，Ñ-二甲基甲酰胺（DMF）匀浆电极浆料。通过实验分析和DFT模拟证实了DMF的分子稳定机理，表明DMF的脱氢能明显大于其他常用溶剂（如NMP等）。软包装锂离子电容器（LIC250）仅占12 wt％交流正极中的Li ₃ N表现出优异的倍率性能，循环稳定性和超高比能。它的比能是不含Li ₃ N的器件的2.3倍，在10,000次循环后的能量保持率高达90％。