Identification | Back Directory | [Name]
TRIS(TRIMETHYLSILOXY)BORON | [CAS]
4325-85-3 | [Synonyms]
TMSB BORON TRIMETHYLSILOXIDE TRIS(TRIMETHYLSILOXY)BORON TRIS(TRIMETHYLSILYL) BORATE Borane, tris(trimethylsiloxy)- TRIS(TRIMETHYLSILYL) BORATE 99% TRIS(TRIMETHYLSILOXY)BORON 97+% Tris(trimethylsiloxy)boron ,96% TRIS(TRIMETHYLSILOXY)BORON TMSB Tris(triMethylsilyl) borate 25GR Silanol, trimethyl-, borate (3:1) Tris(triMethylsilyl) borate, 98%+ Tris(triMethylsilyl) borate (TMSB) Tris(trimethylsiloxy)boron,min.97% boricacidtris-(trimethylsilyl)ester Tris(trimethylsiloxy)boron, min. 97% Tris(trimethylsiloxy)borate, min. 97% trimethyl-silanotriesterwithboricacid(h3bo3) Silanol,trimethyl-,triesterwithboricacid(H3BO3) Silanol, trimethyl-, triester with boric acid (H3BO3) Tris(trimethylsilyl)borate(Tris(trimethylsiloxy)boron) Boric acid tris(trimethylsilyl) ester~Tris(trimethylsiloxy)boron | [EINECS(EC#)]
-0 | [Molecular Formula]
C9H27BO3Si3 | [MDL Number]
MFCD00051588 | [MOL File]
4325-85-3.mol | [Molecular Weight]
278.38 |
Chemical Properties | Back Directory | [Appearance]
Clear colorless liquid | [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.)
| [Fp ]
109 °F
| [storage temp. ]
Flammables area | [form ]
Liquid | [color ]
Clear colorless | [Specific Gravity]
0.828 | [Hydrolytic Sensitivity]
7: reacts slowly with moisture/water | [Sensitive ]
Moisture Sensitive | [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) |
Hazard Information | Back Directory | [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), LiNi0.5Co0.2Mn0.3O2 (4.4 V), LiNi0.5Mn1.5O4 (4.9 V) and layered lithium-rich oxide cathode Li[Li0.2Mn0.54Ni0.13Co0.13]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.
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