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918059

Sigma-Aldrich

1 M 9,9-dimethylfluorene in THF

a precursor solution to prepare the prelithiation reagent for Si anode

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About This Item

Empirical Formula (Hill Notation):
C15H14
CAS Number:
4569-45-3
Molecular Weight:
194.27
MDL number:
MFCD00114670
UNSPSC Code:
12352401
NACRES:
NA.23

Quality Level

100

form

liquid

impurities

≤1000 ppm H2O

application(s)

battery manufacturing

storage temp.

2-8°C

SMILES string

CC1(C)C2=C(C=CC=C2)C3=C1C=CC=C3

InChI

1S/C15H14/c1-15(2)13-9-5-3-7-11(13)12-8-4-6-10-14(12)15/h3-10H,1-2H3

InChI key

ZHQNDEHZACHHTA-UHFFFAOYSA-N

Application

This product offered here allows an ambient-air-tolerant method for negative electrode prelithiation prior to assembly of Li ion batteries. The redox potential of this product makes it useful for those most reported negative electrodes including Si with high capacities and short processing time. It could not only compensate for the initial active lithium loss, but also enable the pairing with high-capacity lithium-free positive electrodes (e.g. sulfur, oxygen, V2O5 etc.) that requires the supply of Li source from the negative electrode to configure Li ion batteries with high energy densities.
Recommended instructions (this should be a separate document):Soak your electrode with the anode material coated on a copper current collector in this prelithiation reagent for a set amount of time. Discard the solution and then wash your electrode twice with THF. For a 1cm diameter electrode with 1∼3 mg acitve material per cm2, use 0.5∼1 mL of prelithiation solution will be enough. You can use an empty coin cell casing as the treatment vessel. Electrode soaking time is important and may need to be optimized for your application. A good time to try is ∼10 min. Longer prelithiation time may cause eletrode structure deformation, leading to a decreased discharge/charge capacity.

Signal Word

Danger

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 2 - Carc. 2 - Eye Irrit. 2 - Flam. Liq. 2 - STOT SE 3

Target Organs

Central nervous system, Respiratory system

Supplementary Hazards

EUH018,EUH019

Storage Class Code

3 - Flammable liquids

WGK

WGK 3

Flash Point(F)

1.4 °F

Flash Point(C)

-17.0 °C

Certificates of Analysis (COA)

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High performance lithium-ion and lithium?sulfur batteries using prelithiated phosphorus/carbon composite anode.
Wang G, et al.
Energy Storage Materials, 24, 147-152 (2020)
Gongwei Wang et al.
ACS applied materials & interfaces, 11(9), 8699-8703 (2019-02-20)
This study reports an ambient-air-tolerant approach for negative electrode prelithiation by using 1 M lithium-biphenyl (Li-Bp)/tetrahydrofuran (THF) solution as the prelithiation reagent. Key to this strategy are the relatively stable nature of 1 M Li-Bp/THF in ambient air and the
High performance lithium-ion and lithium−sulfur batteries using prelithiated phosphorus/carbon composite anode..
Wang F, et al.
Energy Storage Materials, 24, 147-152 (2020)

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