Tris(trimethylsilyl) borate Chemical Properties

Melting point:

-35°C

Boiling point:

186 °C (lit.)

Density 

0.831 g/mL at 25 °C (lit.)

refractive index 

n20/D 1.386(lit.)

Flash point:

109 °F

storage temp. 

Inert atmosphere,2-8°C

form 

Liquid

Specific Gravity

0.828

color 

Clear colorless

Sensitive 

Moisture Sensitive

Hydrolytic Sensitivity

7: reacts slowly with moisture/water

BRN 

1772733

InChI

InChI=1S/C9H27BO3Si3/c1-14(2,3)11-10(12-15(4,5)6)13-16(7,8)9/h1-9H3

InChIKey

YZYKZHPNRDIPFA-UHFFFAOYSA-N

SMILES

[Si](C)(C)(C)OB(O[Si](C)(C)C)O[Si](C)(C)C

CAS DataBase Reference

4325-85-3

EPA Substance Registry System

Silanol, trimethyl-, triester with boric acid (H3BO3) (4325-85-3)

Safety Information

Hazard Codes 

Xi

Risk Statements 

10-36/37/38

Safety Statements 

26-36

RIDADR 

UN 1993 3/PG 3

WGK Germany 

3

F 

10-21

TSCA 

Yes

HazardClass 

3

PackingGroup 

III

HS Code 

29319090

MSDS

• Language:English Provider:SigmaAldrich
• Language:English Provider:ALFA

Tris(trimethylsilyl) borate Usage And Synthesis

Chemical Properties

Clear colorless liquid

Uses

Tris(trimethylsilyl) borate is used as intermediate of organic synthesis and additive of lithium battery electrolyte.

Properties and Applications

Tris (trimethylsilyl) borate (TMSB) has been investigated as a protective cathode additive for increasing the cycle performance of several high-voltage cathode materials, including LiMn2O4 (4.5 V), LiNi_0.5Co_0.2Mn_0.3O₂ (4.4 V), LiNi_0.5Mn_1.5O₄ (4.9 V) and layered lithium-rich oxide cathode Li[Li_0.2Mn_0.54Ni_0.13Co_0.13]O₂ (4.8 V). TMSB can also be applied as an effective electrolyte additive to raise the cycle life of LiMn2O4 and LiFePO4 cathode Li-ion batteries at 55 °C. Compared with tris(trimethylsilyl)phosphate (TMSP), the CEI film generated from TMSB, which contains B and Si-rich compounds, shows a better ability to restrain the growth of interfacial resistance during cycling. The results reveal that the TMSB additive is easy to complex with Li⁺ ions, thus weakening the intermolecular force between Li+ ions and ethylene carbonate solvent, which is beneficial for the cycle performance. Besides, the changed Li+ solvation structure results in a thin and dense CEI film containing compounds with Si–O and B–O bonds, which favors the transfer of Li+ ions[1–2].

References

[1] Yan Chunfeng . “Tris(trimethylsilyl) borate as an electrolyte additive for high-voltage lithium-ion batteries using LiNi1/3Mn1/3Co1/3O2 cathode.” Journal of Energy Chemistry 25 4 (2016): Pages 659-666.
[2] Jie Wang . “Adjusting the solvation structure with tris(trimethylsilyl)borate additive to improve the performance of LNCM half cells.”Journal of Energy Chemistry 67 (2022): Pages 55-64.

Tris(trimethylsilyl) borate(4325-85-3)Related Product Information

• TRIS(TRIMETHYLSILYL)PHOSPHITE
• Tris(trimethylsilyl)phosphate
• Trimethyl borate
• Vinyl chloroacetate
• Tributyl citrate
• Azoxystrobin
• Dacthal
• 2-Chloroethyl chloroformate
• Methyl 2-bromobenzoate
• Trimethoxypropylsilane
• Dimethyl carbonate
• Propylene carbonate
• Vinylene carbonate
• 1,5,2,4-Dioxadithiane 2,2,4,4-tetraoxide
• Chloroethylene carbonate
• Lurasidone hydrochloride
• Butyl 2-chloroacetate
• Trimellitic Anhydride