The cycling stability of Li_1.2Ni_0.2Mn_0.6O₂ cathodes is increased enormously by adding 0.1 %wt 1,4-dicyanobenzene (1,4-DCB) additive in the electrolyte, and the capacity retention increases from 20.3% to 63.8% after 350 cycles. It is found that 1,4-DCB eliminates the trace water in the electrolyte via hydrolysis under acidic conditions. A coating layer on the electrode surface is formed by preferentially oxidized of 1,4-DCB, which reduce the contact between electrolyte and cathode, inhibiting the decomposition of electrolyte solvent. N group in the electrooxidation product of 1,4-DCB can combine with PF₅ to improve the stability of LiPF₆, then reducing the decomposition of LiPF₆. The benzene ring and conjugated bond of 1,4-DCB are favorable for the transfer of interfacial electron and ion, and then the electrochemical performance of lithium-rich layered materials is improved.

Li _1.2 Ni _0.2 Mn _0.6 O ₂正极的循环稳定性在电解液中添加0.1%wt 1,4-二氰基苯（1,4-DCB）添加剂后显着提高，容量保持率从20.3%提高到63.8% 350 个循环。发现 1,4-DCB 在酸性条件下通过水解消除了电解液中的痕量水。1,4-DCB优先氧化在电极表面形成涂层，减少电解液与阴极的接触，抑制电解液溶剂的分解。1,4-DCB电氧化产物中的N基团可以与PF ₅结合提高LiPF ₆的稳定性，从而减少LiPF的分解₆ . 1,4-DCB的苯环和共轭键有利于界面电子和离子的转移，进而提高富锂层状材料的电化学性能。