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NEI Products › Battery Materials › Cathode & Anode Tapes › for Li-ion Batteries › Silicon
Silicon-Graphite Tapes
Anode Electrode Sheets for Lithium-ion Batteries
Silicon (Si) is widely used in high-energy lithium-ion batteries because its theoretical capacity (~) far exceeds that of standard graphite. However, silicon significantly expands and contracts during use, which can lead to mechanical failure.
To address this, NEI offers composite anode sheets with 10% and 20% silicon mixed into a graphite matrix. The graphite acts as a structural support to help manage volume changes, while an integrated network of Multi-Walled Carbon Nanotubes (MWCNTs) and a specialized binder system help maintain electrical contact between particles. These composite sheets provide a practical way to increase energy density over pure graphite while utilizing a matrix designed to improve overall structural integrity during cycling.
NANOMYTE® Silicon-Graphite Electrode Sheets
NEI manufactures two variations of silicon-graphite composite electrodes: NANOMYTE® BE-100E with 10% Silicon and NANOMYTE® BE-150E with 20% Silicon.
Standard electrode sheets are 5 inches x 10 inches (127 mm x 254 mm) and cast either single-sided or double-sided on 10 µm thick copper foil current collectors. NEI also offers customization options, such as different active material loadings, electrode composition, binder type, current collector, and more.
Select a tab below to learn more about each material, including links to our technical and safety data and ordering information.
10% Si-Graphite (BE-100E)
NANOMYTE® BE-100E (10% Silicon-Graphite)
Our 10% Silicon-Graphite anode electrode sheets are composed of 10% Silicon, 77.5% Graphite, 7% SBR-PAA-CMC binder, and 5.5% MWCNT-Carbon Black mixture cast on a copper foil current collector. They are available in ready-to-use packages of 2, 5, 10, 25, 50, and 100 sheets (or more).
Product Specifications:
- Current Collector: Copper (10 µm thick)
- Sheet Size: 5 in x 10 in (127 mm x 254 mm)
- Coating: Single and Double-sided sheets available, coated edge-to-edge (unless specified otherwise)
- Calendered: Yes
- Standard Areal Capacity: 4 mAh/cm2 ± 5% (per side)
- Active Material Loading: 0.77 mg/cm2 ± 5% (per side)
- Tape Thickness: 76 µm ± 5% (excluding current collector)
- Minimum Delithiation Capacity: 520 mAh/g
- Nominal Capacity: ≥ 540 mAh/g
View/Download Specification Sheet (pdf ↓)
Product Safety Information:
This product is a solid, multi-layered article and defined as an “Article” under the OSHA Hazard Communication Standard (29 CFR 1910.1200) and the REACH Regulation (EC) No. 1907/2006.
Hazardous ingredients, including Silicon, MWCNTs, and Carbon Black, are fully encapsulated within a dried polymer matrix of PAA, CMC, and SBR. In this manufactured state, the ingredients are not respirable, nor do they exhibit flammable properties. The product does not meet the criteria for classification as a hazardous substance under GHS/OSHA/REACH. Hazards listed for individual components apply only to the release of dust or fumes through mechanical grinding, high-heat thermal decomposition, or chemical dissolution.
In its manufactured and shipped form, it does not pose a physical hazard or health risk to humans or the environment.
Precautions for Safe Handling
Appropriate personal protective equipment should be used at all times. Avoid contact with eyes and skin. Handle in a well-ventilated area. Avoid creasing and folding, or actions that abrade, sand, or grind the coated surface, as this can cause the brittle Silicon-Graphite coating to delaminate or flake off, creating unnecessary dust. Do not eat or drink in the area where sheets are handled. Wash hands after handling to ensure no conductive carbon particles remain on the skin.
Conditions for Safe Storage
Silicon and PAA binders are hygroscopic. Store sheets flat and in a dry and well-ventilated place, away from heat —ideally a desiccator or a dry box. Exposure to humidity can cause the PAA binder to swell or the silicon to surface-oxidize, degrading electrochemical performance.
For complete information on the safe use of this material, please refer to the Safety Data Sheet:
View/Download Safety Data Sheet (pdf ↓)
20% Si-Graphite (BE-150E)
NANOMYTE® BE-150E (20% Silicon-Graphite)
Our 20% Silicon-Graphite anode electrode sheets are composed of 20% Silicon, 65% Graphite, 9% PAA-SBR binder, and 6% MWCNT-Carbon Black mixture cast on a copper foil current collector. They are available in ready-to-use packages of 2, 5, 10, 25, 50, and 100 sheets (or more).
Product Specifications:
- Current Collector: Copper (10 µm thick)
- Sheet Size: 5 in x 10 in (127 mm x 254 mm)
- Coating: Single and Double-sided sheets available, coated edge-to-edge (unless specified otherwise)
- Calendered: Yes
- Standard Areal Capacity: 4 mAh/cm2 ± 5% (per side)
- Active Material Loading: 1.25 mg/cm2 ± 5% (per side)
- Tape Thickness: 65 µm ± 5% (excluding current collector)
- Minimum Delithiation Capacity: 700 mAh/g
- Nominal Capacity: ≥ 750 mAh/g
View/Download Specification Sheet (pdf) ↓
Product Safety Information:
This product is a solid, multi-layered article and defined as an “Article” under the OSHA Hazard Communication Standard (29 CFR 1910.1200) and the REACH Regulation (EC) No. 1907/2006.
Hazardous ingredients, including Silicon, MWCNTs, and Carbon Black, are fully encapsulated within a dried polymer matrix of PAA, CMC, and SBR. In this manufactured state, the ingredients are not respirable, nor do they exhibit flammable properties. The product does not meet the criteria for classification as a hazardous substance under GHS/OSHA/REACH. Hazards listed for individual components apply only to the release of dust or fumes through mechanical grinding, high-heat thermal decomposition, or chemical dissolution.
In its manufactured and shipped form, it does not pose a physical hazard or health risk to humans or the environment.
Precautions for Safe Handling
Appropriate personal protective equipment should be used at all times. Avoid contact with eyes and skin. Handle in a well-ventilated area. Avoid creasing and folding, or actions that abrade, sand, or grind the coated surface, as this can cause the brittle Silicon-Graphite coating to delaminate or flake off, creating unnecessary dust. Do not eat or drink in the area where sheets are handled. Wash hands after handling to ensure no conductive carbon particles remain on the skin.
Conditions for Safe Storage
Silicon and PAA binders are hygroscopic. Store sheets flat and in a dry and well-ventilated place, away from heat —ideally a desiccator or a dry box. Exposure to humidity can cause the PAA binder to swell or the silicon to surface-oxidize, degrading electrochemical performance.
For complete information on the safe use of this material, please refer to the Safety Data Sheet:
View/Download Safety Data Sheet (pdf) ↓
Custom Options
Customization Options
Don’t settle for a one-size-fits-all solution! NEI understands that your battery development needs are unique. That’s why we offer extensive customization options for our cathode and anode electrode sheets. For a nominal fee, our electrodes can be custom tailored to your specification, such as:
- Active Material Loading: specify the active loading (mg/cm2) per side
- Areal Capacity: specify the desired areal capacity of the electrode (mAh/cm2) per side
- Electrode Composition: modify the ratio of active material, conductive carbon, and binder
- Binder Type & Content: aqueous/non-aqueous
- Current Collector Type: aluminum/copper
- Sheet Size: the sheet size can be modified from our standard 5″ x 10″ sheets
- Uncoated Tab Areas: specify the uncoated areas along the length of one or both sides of the sheet
With NEI’s customizable electrode tapes, you have the power to create the perfect lithium-ion battery solution for your unique needs.
*NEI’s spec tolerance is ± 5%; some customization options are subject to availability and will increase the lead time.
Technical Links
Technical Links
View and download the latest technical data for our Silicon-Graphite composite electrode sheets.
NANOMYTE® BE-100E (10% Silicon-Graphite tapes):
NANOMYTE® BE-150E (20% Silicon-Graphite tapes):
Ordering Information
Ordering Information
To request pricing for any of our electrode sheets, please complete our quote form. Additional details about our ordering process can be found below.
All of NEI’s materials are shipped directly to you from our facilities in Somerset, NJ (USA). For our customers in South Korea and Japan, please send us your request and we will put you in touch with our local representatives.
Minimum Order Quantities (MOQ)
- 2 sheets (per material and specification)
Unfortunately, we are unable to provide free samples.
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Page updated March 12, 2026