Application Analysis of the Film-Forming Electrolyte Additive TMSP

Introduction to the Physical Properties of TMSP

Trimethylsilyl phosphate (TMSP) is a colorless, transparent liquid with a density of 0.953 g/cm³. ³ , room temperature Fold Its refractive index is 1.4071, its normal‑pressure boiling point is 228–229°C, and its normal‑pressure flash point is 110.8°C. Its distinctive phosphorus‑containing structure and trimethylsilyl groups endow TMSP with unique physicochemical properties and broad application prospects.

Uses of TMSP

Lithium-ion battery electrolyte technology field

Research on the application of TMSP in lithium-ion batteries first emerged in 2014, and since then, TMSP has garnered significant attention from both academia and industry as an excellent film-forming additive. With its low redox potential, TMSP preferentially undergoes oxidative decomposition during solvent reduction, thereby forming a dense, smooth CEI layer rich in C, O, P, Si, and other elements on the cathode surface.

In the field of lithium-ion batteries, TMSP exhibits several outstanding performance characteristics:

1. Enhance initial efficiency and reduce impedance

Guochun Yan et al. ^[1] The study found that, in NCM523 batteries, TMSP can form a stable solid electrolyte interphase (SEI) layer during the initial cycling stages and simultaneously mitigate the increase in impedance over long-term cycling. Furthermore, TMSP enhances the battery’s initial coulombic efficiency and improves its cycle life.

2. Suppressing self-discharge

Xiaolin Liao et al. ^[2] It was found that, in NCM111, a 1 wt% addition of TMSP can suppress battery self-discharge and enhance room-temperature cycling performance.

3. Enhance high-rate performance

HaiboRong et al. ^[3] The study found that adding 1 wt% of TMSP can enhance the battery’s high-rate performance at room temperature.

4. Suppressing capacity fade

HaiboRong ^[4] The team experimentally demonstrated that TMSP can suppress the dissolution of transition metals and their deposition on the negative electrode in nickel–manganese oxide batteries, and by inhibiting parasitic reactions at the electrode, it reduces battery capacity fade.

5. Enhancing High-Voltage Cycling Performance

Xu Fei ^[5] It has been found that the addition of 1 wt% TMSP can enhance the high-voltage cycling performance of ternary lithium-ion batteries.

Other fields

TMSP is widely used as a catalyst in organic synthesis. It can serve as a crosslinking agent for polysiloxane resins and organosilicon polymers, employed in the formulation of coatings, adhesives, and sealants. TMSP is also utilized as an organic‑synthetic reagent, functioning as a catalyst in ketone reduction and allylation reactions.

References:

[1] Yan, G.; Li, X.; Wang, Z.; Guo, H.; Wang, C. Tris(trimethylsilyl) Phosphate: A Film-Forming Additive for High Voltage Cathode Material in Lithium-Ion Batteries. Journal of Power Sources 2014, 248, 1306–1311.

[2] Liao, X.; Zheng, X.; Chen, J.; Huang, Z.; Xu, M.; Xing, L.; Liao, Y.; Lu, Q.; Li, X.; Li, W. Tris(trime-thylsilyl) Phosphate as Electrolyte Additive for Self-Discharge Suppression of Layered Nickel Cobalt Manganese Oxide. Electrochimica Acta 2016, 212, 352–359.

[3] Rong, H.; Xu, M.; Xie, B.; Huang, W.; Liao, X.; Xing, L.; Li, W. Performance Improvement of Graphite/LiNi _0.4 Co _0.2 Mn _0.4 O ₂ Battery at High Voltage with Added Tris(trimethylsilyl) Phosphate. Journal of Power Sources 2015, 274, 1155–1161.

[4] Rong, H.; Xu, M.; Xing, L.; Li, W. Enhanced Cyclability of LiNi _0.5 Mn _1.5 O ₄ Cathode in Carbonate Based Electrolyte with Incorporation of Tris(trime-thylsilyl) Phosphate (TMSP). Journal of Power Sources 2014, 261, 148–155.

[5] Xu Fei & Gu Yueru. (2019). Effect of tri(trimethylsilyl) phosphate on the high-voltage performance of ternary lithium-ion batteries. Phosphate and Compound Fertilizer, 34(09), 31–33.

Cheerchem Advanced Material’ TMSP product

Cheerchem Advanced Material consistently upholds the principles of technological innovation and process optimization, successfully developing TMSP products with outstanding performance. Our product features are as follows:

High purity: The product purity remains stable at More than 99.9%

Quality Assurance: Leveraging advanced manufacturing technologies, we ensure consistent and reliable product quality.

Supply Advantage: Sufficient production capacity and stable supply, with long-term service to the lithium‑ion battery industry.

About Cheerchem Advanced Material

Cheerchem Advanced Material is a high-tech enterprise specializing in the research, development, production, and sales of lithium-ion electrolyte additives, lithium salt electrolytes, and functional organosilicon materials. The company has four subsidiaries: Shandong Cheerchem Advanced Material Co., Ltd., Fuzhou Cheerchem New Energy Materials Co., Ltd., Suzhou Qizhu New Materials Co., Ltd., and Hangzhou Sulong Materials Technology Co., Ltd. The company continuously gains insights into industry trends. , the company has researched and developed functional additives suitable for a wide range of cathode and anode chemistries and application scenarios. With an annual production capacity of 36,900 tons of lithium‑ion battery electrolyte additives, it offers an extensive product portfolio that enhances key electrochemical performance metrics, including high‑ and low‑temperature stability, high voltage tolerance, fast‑charge capability, cycle life, safety, and overall stability. In addition, the company has established a comprehensive management system and has successfully obtained ISO 9001, ISO 14001, ISO 45001, IATF 16949, and Level 2 certification for occupational safety and health standards. , gradually achieving sustained, steady, and rapid development.

Cheerchem Advanced Material has been deeply engaged in the lithium‑ion battery electrolyte sector for many years and is one of the world’s earliest suppliers of electrolyte additives. Through continuous technological innovation, the company delivers safer, more environmentally friendly, high‑quality products and services that meet customer needs, helping to build a better life for the nation, creating value for our clients, and adding vibrant color to the world!