硫系添加剂在高镍锂离子电池中的改性研究

为了改善高镍锂离子电池的性能,在电解液中加入PS和DTD两种硫系添加剂。实验结果表明,PS和DTD均可有效改善电池性能,尤其是DTD,显著改善了电池的低温放电性能、倍率性能和高温贮存性能,可作为高镍圆柱形锂离子电池的改性成膜添加剂。

硫磷系权压抗磨添加剂的发展动态

一、前言 汽车工业的飞速发展,迫切要求加快润滑油脂的升级换代。润滑油脂的升级换代,有二种基本方法:一是提高基础油脂的质量;二是改进添加剂的性能。S—P型齿轮油的发展历程就是一个典型例证。S—P型齿轮油经过30多年的发展,已研制和开发出三代产品,其中硫系、磷系添加剂是齿轮油的常见主剂。硫系添加剂主要是硫化烯烃,可以说,S—P型齿轮油的发展主要是围绕含磷剂的改进和添加剂复配技术的开发而发展的。据此,各工业化国家的摩擦学工作者对硫、磷系添加剂进行了大量的研究。

Utilization of coal-derived pyrite by electrolysis

The utilization of coal derived pyrite by electrolysis was studied. It is obvious that the sulfur and Fe in pyrite can be electrolyzed into Fe 3+ and SO 2- 4, and the no pollutant is drained off. In this paper, the influence of conditions, including electrolysis potential, time, temperature, the acidity of electrolysis solutions, the concentration of adding agent, the concentration of pyrite, and the rate of conversion of pyrite (Cr) was investigated. Cr increases with the rise of potential, time, temperature, acidity and the concentration of additive agent, but decreases with the rise of concentration of pyrite. At the certain conditions (at the potential of 3 0 V, temperature of 298 K, time of 12 h, the concentration of MnSO 4 of 6%, concentration of pyrite of 4%, and concentration of acid of 10%), Cr is high to 93%. In the same time, the mechanism of electrolysis of pyrite was provided. The electrolysis of pyrite is actually the recycle of Mn ion between anodic surface and pyrite. At last, the production of FeSO 4·7H 2O through electrolysis of pyrite was introduced.