CAS：21806-61-1| The Application of PST in lithium batteries

Product Name：PST
CAS： 21806-61-1
Molecular Formula：C3H4O3S
Article No.：B0069
Structural Formula：

Product Introduction
1,3-propylsulfonic acid lactone is a sulfonic acid ester compound mainly used as an intermediate in organic synthesis and pharmaceutical chemistry, and can also be used as an additive in electrolytes.
Application of PST
Lithium ion batteries have advantages such as high volume and mass energy density, environmental friendliness, high operating voltage, small size, light weight, and long cycle life, making them widely used in the field of portable consumer electronics. With the rapid development of electric vehicles and mobile electronic devices in recent years, people's demand for energy density, safety, cycle performance, and other related aspects of batteries is increasing. They are looking forward to the emergence of new lithium-ion batteries with comprehensive performance improvement; Among them, energy density and cycling performance have become key technical issues that urgently need to be solved, and improving the active materials in electrodes is one of the research directions to solve these problems. Graphite is currently the most widely used negative electrode material, with advantages such as low polarization and stable charging and discharging platforms. However, the performance of commercial graphite has been almost developed to the extreme, and its reversible capacity and energy density are difficult to further improve without lithium precipitation. Therefore, the CN117859216A patent developed electrochemical devices and electronic devices.
The electrochemical device includes a negative electrode plate, an isolation film, a positive electrode plate, and an electrolyte. Among them, the electrolyte includes organic solvents, electrolyte lithium salts, and additives.
Additives can be one or more of vinyl carbonate (VC), ethyl vinyl carbonate (VEC), succinonitrile (SN), adiponitrile (AND), 1,3-propylsulfonic acid lactone (PST), sulfonic acid cyclic quaternary ammonium salt, tris (trimethylsilane) phosphate (TMSP) or tris (trimethylsilane) borate (TMSB).
The molar ratio of H element to C element in the negative electrode active material layer of the electrochemical device is within an appropriate range, which is conducive to improving the transfer speed of active ions. At the same time, regulating the CB value of the electrochemical device from 0.95 to 1.05 is conducive to improving the energy density of the electrochemical device and improving the lithium evolution situation of the electrochemical device.

References
CN117859216A  Electrochemical devices and electronic equipment.