HF (Hydrofluoric Acid) Scavenging Glass
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Technical Details of HF (Hydrofluoric Acid) Scavenging Glass Frit

The HF-absorbing glass is sold under glass code G018-405. It is melted as standard under permanent control of physical and chemical properties. Further processing into a homogeneous powder with a defined particle size distribution is based on decades of experience in a specialized process. This creates a high quality product with reproducible properties.

Enhanced lifetime and safety through functionality

Enhanced lifetime via hydrofluoric acid scavenging

The degradation of the cell by HF, which manifests itself in premature capacity loss and gas formation, is permanently prevented. Particularly sensitive new electrode materials with high energy densities can therefore be made possible in next-generation battery cells.

Temperature-stable and low abrasion

The glass is sufficiently temperature stable to be used in the field of ceramic coating to increase safety. Here, it's also characterized by a lower abrasiveness than common ceramic materials. As a result, metal particles from the production process can be avoided.

Chemically and electrochemically stable

The HF glass is stable in standard conducting salts and standard salts. In addition, it's electrochemically stable in a wide voltage window, both in low- and high-voltage situations.

Optimum production methods

This HF-absorbent glass undergoes a closely monitored two-stage production process to ensure optimum results. First the raw glass is melted in specially designed aggregates before being ground into fine powders of different grain sizes.
Material Data
Chemical Process

SCHOTT HF Scavenging Glass G018-405

HF Scavenging Glass G018-405

Glass powder grain sizes [µm] 

d(50)

d(99)

Standard (UF1.0) / Fine (UF0.7)

1.0/0.7

<7 /<5
Specific surface are (BET method) [m2 f / g] 5/8
HF scavenging glass efficiency [mg F / g] 40-60
Max. operation temperature [°C] > 600
Hardness (Knoop) 440
Density [g/cm3] 4.1
Coefficient of thermal expansion (-30/+70 °C) [10-6/K-1] 10.1
Young's Modulus [GPa] 68
Wettability with electrolyte (contact angle bulk Θ) [°] 15-30

 

Chemical Process

Integration I: HF scavenger particles as heat-resistant separation layer.

HF scavenger particles as heat-resistant separation layer

This offers a combination of safety and lifetime enhancement.

 

 

Intergration I: HF scavenger additive mixed with cathode material. 

HF scavenger additive mixed with cathode material

HF scavenger additive mixed with cathode material

Local HF attack hindered by glass particles mixed with electrode material.

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David Bühlmeyer, Sales Manager Europe
David Bühlmeyer

Sales Manager Europe