TMSB (Tris(trimethylsilyl)borate) – Interface Regulation and Performance Enhancement of Lithium-Ion Battery Cathodes
2026-01-15 00:00
Product Overview
TMSB (tris(trimethylsilyl)borate), with the English name Tris(trimethylsilyl)borate, is a structurally simple boron‑containing organosilicon compound. It features a unique three‑dimensional B–O–Si framework, in which a boron atom is coordinated to three oxygen atoms that bridge three trimethylsilyl groups. Since its first reported synthesis by General Electric in 1948, TMSB has seen expanding applications and has now become a key functional additive in lithium‑ion battery electrolytes, while also playing an important role in organic synthesis, materials science, and the nuclear energy industry. Owing to its excellent interfacial‑control properties, TMSB provides essential support for enhancing critical battery performance metrics such as high voltage, long cycle life, and high rate capability, making it an indispensable high‑end material for the emerging lithium‑ion battery industry.
Basic Chemical Information
Chinese name: Tris(trimethylsilyl)borate
English name: Tris(trimethylsilyl)borate
Molecular formula: C₉H₂₇BO₃Si₃
Molecular weight: 278.38
Boiling point: 228–229°C (760 mmHg)
Core Performance and Lithium-Ion Battery Application Value
As an electrolyte additive for lithium‑ion batteries, TMSB’s key advantage lies in its ability to preferentially form a stable interfacial film on the electrode surface, thereby suppressing side reactions. Its electron-deficient structure can complex with PF₆⁻, increasing the distance between PF₆⁻ and Li⁺ and altering the solvation structure of Li⁺, which in turn inhibits the thermal decomposition of LiPF₆ and comprehensively enhances the battery’s cycling performance. The specific improvements in performance are as follows:
1. Enhancing the cycling performance of high-voltage systems
Although LiCoO₂ (LCO) cathode material boasts a high theoretical specific capacity (274 mAh/g) and a high volumetric energy density, its operation at elevated voltages can readily trigger structural collapse and undesirable side reactions at the electrolyte–electrode interface. Experimental results demonstrate that incorporating a 2% TMSB functional additive into the electrolyte increases the capacity retention of LCO batteries over 300 cycles from 68.1% to 74.8%, while improving the coulombic efficiency from 99.83% to 99.85%, thereby significantly enhancing the cycling stability of high‑voltage batteries.
2. Construct a cathode protective film to solidify the foundation of stability.
In the LiNi₀.₅Mn₁.₅O₄ (LNMO) battery system, the addition of TMSB promotes its preferential oxidation over the solvent at the cathode surface, thereby forming a stable cathode–electrolyte interphase (CEI) film that effectively preserves the material’s structural integrity and significantly suppresses self‑discharge during full‑state storage. For the LiMn₂O₄ (LMO) cathode, which suffers from structural distortion, particle fracture, and manganese dissolution due to the Mn³⁺ Jahn–Teller effect, TMSB enhances structural stability and mitigates interfacial side reactions by establishing a robust CEI layer, leading to a substantial improvement in cycling performance. These findings have been corroborated by advanced characterization techniques, including XPS, SEM, and XRD.
3. Break through the impedance bottleneck and unlock rate capability
TMSB can modulate the Li⁺ solvation structure, weaken the interactions between Li⁺ and carbonate solvents, and lower the desolvation energy barrier, thereby effectively enhancing Li⁺ mobility, reducing interfacial impedance, and significantly improving the battery’s rate performance. Studies show that even a TMSB addition level of just 0.5% is sufficient to achieve a substantial improvement in rate performance, meeting the demands of high‑end lithium‑ion battery applications such as fast charging.
Multi‑domain application expansion
As a high-value organosilicon fine chemical, TMSB’s applications span multiple high-end sectors:
- In the field of organic synthesis, it can serve as an efficient protecting group for hydroxyl, carboxyl, amino, and amide functionalities, providing precise control over synthetic pathways in fine chemical production.
- In the field of materials science: serving as a catalyst for polymerization reactions, an intermediate in silicon–boron functional materials, and a precursor in microelectronics technologies, thereby supporting the research, development, and production of advanced materials.
- Nuclear energy industry: Owing to its unique chemical properties, it can serve as a neutron absorber in nuclear‑related applications.
Core Advantages of Cheerchem Advanced Material’ TMSB Products
Suzhou Cheerchem, guided by the principles of technological innovation and process optimization, has successfully developed its TMSB product line, which, thanks to its core competitive advantages, consistently ranks among the market leaders. Its key strengths are as follows:
- High-Purity Assurance: The product’s purity remains consistently above 99.90%, with extremely low impurity levels, enabling precise compliance with the stringent requirements of high-end lithium‑ion battery and fine chemical applications.
- Absolutely stable quality: Employing advanced synthesis and purification processes, coupled with a rigorous, end-to-end quality control system, we ensure consistent product performance across all batches, providing robust support for stable production for our customers.
- Sufficient supply capacity: Leveraging the company’s well‑established production capacity network, TMSB boasts ample manufacturing capacity and a robust supply chain, maintaining a leading market share and meeting the demands of large‑scale industrial procurement.
- Comprehensive Technical Services: Leveraging deep technical expertise cultivated over years in the lithium‑ion battery additives field, we provide customers with comprehensive support—including rapid‑response technical consulting and customized solutions—to help optimize their application performance.
About Cheerchem Advanced Material
Suzhou Cheerchem Advanced Material Co., Ltd. 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.—which together have established a comprehensive industrial footprint.
The company continuously monitors industry trends and has developed a comprehensive portfolio of functional additives suitable for various cathode and anode chemistries. With a total annual production capacity of 36,900 metric tons of lithium‑ion battery electrolyte additives, it effectively enhances battery performance across key parameters, including high‑ and low‑temperature stability, high‑voltage compatibility, rate capability and fast charging, cycle life, safety, and thermal stability. Meanwhile, the company has established a robust management system, obtaining ISO 9001, ISO 14001, ISO 45001, IATF 16949, and Level II certification for workplace safety, enabling sustained, steady, and rapid growth.
As one of the world’s earliest suppliers of lithium‑battery electrolyte additives, Cheerchem Advanced Material consistently places technological innovation at its core, delivering safer, more environmentally friendly, and higher‑quality products and services to meet customer needs, support the nation’s energy transition, create value for our clients, and bring greater vibrancy and excellence to the world.
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Suzhou Qitian New Materials Co., Ltd.
A high-tech enterprise specializing in the research, development, production, and sales of lithium-ion battery electrolyte additives and functional organosilicon materials.
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