3, 3’-sulfonyldipropionitrile (SDPN) is structurally different from previously reported compounds and was studied as a film-forming additive for the LiMn₂O₄ cathode at elevated temperature. The retention capacity of the LiMn₂O₄/Li cell with the electrolyte (1.0 M LiPF₆–EC/DMC/EMC) containing 0.5 wt% SDPN cycled at 55 °C and increased significantly from 56.7% to 70.3% after 200 cycles. The SDPN is more easily oxidized than the solvents, and may take part in the formation of the interface layeon the cathode surface. The results of electrochemical impedance spectroscopy (EIS) and nuclear magnetic resonance spectroscopy (NMR) show that the solid electrolyte interphase (SEI) is gradually formed during cycling. The X-ray photoelectron spectroscopy (XPS) and transmission electron microscopy (TEM) data demonstrate that a thinner SEI with less inorganic degradation products can be formed on the surface of the LiMn₂O₄ cathode due to SDPN.

3，3'-磺酰基二丙腈（SDPN）在结构上与先前报道的化合物不同，并已在高温下作为LiMn ₂ O ₄阴极的成膜添加剂进行了研究。LiMn ₂ O ₄ / Li电池对电解质的保持能力（1.0 M LiPF ₆包含0.5 wt％SDPN的–EC / DMC / EMC）在55°C下循环，并在200个循环后从56.7％显着增加至70.3％。SDPN比溶剂更容易被氧化，并可能参与形成阴极表面的界面。电化学阻抗谱（EIS）和核磁共振谱（NMR）的结果表明，在循环过程中逐渐形成了固体电解质相（SEI）。X射线光电子能谱（XPS）和透射电子显微镜（TEM）数据表明，由于SDPN ，可以在LiMn ₂ O ₄阴极的表面上形成具有较少无机降解产物的更薄的SEI 。