High Performance Battery Materials

Cathodes, Anodes, and Electrolytes

Sublimed Sulfur Tapes

Cathode Electrode Sheets

Sulfur cathodes offer a high theoretical capacity of 1,672 mAh/g in a Li-S cell, which is an order of magnitude higher than those of the transition-metal oxide cathodes. The high capacity is based on the conversion reaction of sulfur to form lithium sulfide (Li2S) by reversibly incorporating two electrons per sulfur atom. Li−S cell consists of a lithium metal anode, an organic electrolyte, and a sulfur composite cathode, which leads to a theoretical cell capacity of 1,167 mAh/g. BE-70E has a practical capacity of at least 800 mAh/g. The discharge reaction has an average cell voltage of 2.15 V, resulting in a high theoretical gravimetric energy density of 2,509 Wh/kg at the cell level.

NANOMYTE® BE-70E is a cast electrode tape of Sublimed Sulfur powder. The standard cathode sulfur tape is cast on 5 inch x 10 inch sheets of aluminum foil, single-side coated with a 70% active material loading. Our tapes can also be customized to accommodate different active material loadings, coating thickness, binder type (aqueous/non-aqueous), and binder content, as well as choice of current collector. Select a tab below to learn more.

Electrode Sheets Brochure

Product Specifications

NANOMYTE® BE-70E Specifications

Sublimed Sulfur Electrode Sheets

Active Material Characteristics

  • Product Description: Sublimed Sulfur electrode sheet
  • Formula: S
  • Purity: 99.5%
  • Average Particle Size (APS): < 150 μm

Standard Electrode Tape Characteristics

  • Current Collector: Carbon Coated Aluminum
  • Current Collector Thickness: 16 μm
  • Sheet Size: 5 in x 10 in (12.7 cm x 25.4 cm)
  • Areal Capacity: 3 mAh/cm2 ± 5%
  • Tape Thickness: 55 μm (excluding current collector)
  • Standard Tape Composition: 70% Sulfur; 10% PVDF (binder); 20% Carbon Black (conductive carbon)

Electrical Characteristics

  • Nominal Voltage vs. Li/Li+: ~2.1V
  • Minimum Capacity: 800 mAh/g
  • Nominal Capacity at 0.1C: ≥ 900 mAh/g

Recommended Operating Conditions

  • Maximum Charge Voltage: 2.7 V vs. Li/Li+
  • Cutoff Voltage for Discharge: 1.5 V vs. Li/Li+
  • Maximum Charge Current: N/A
  • Maximum Discharge Current: N/A

Complete Specification Sheet: NANOMYTE® BE-70E (pdf) »

Safety Information

Product Safety Information

Tape Composition / Materials:

Percentage % Material Hazards
70% Sublimed Sulfur (active material) Flammable solid; causes skin irritation; causes serious eye irritation; may cause respiratory irritation; harmful to aquatic life.
10% PVDF (binder) Not a hazardous substance or mixture.
20% Carbon Black (conductive carbon) Suspected of causing cancer.

Precautions for Safe Handling:
Appropriate personal protective equipment should be used at all times. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Further processing of solid materials may result in the formation of combustible dusts. The potential for combustible dust formation should be taken into consideration before additional processing occurs. Provide appropriate exhaust ventilation at places where dust is formed. Appropriate personal protective equipment should be used at all times.

Conditions for Safe Storage:
Store in a dry and sealed pouch or under inert atmosphere. Avoid moisture. Keep away from heat and sources of ignition. Avoid contamination with incompatible materials. Storage class (TRGS 510): 4.1B: Flammable solid hazardous materials

For complete information on the safe use of this material, please refer to the Safety Data Sheet »

NOTE: NEI Corporation believes that the information provided is an accurate description of the typical use of the product. However, NEI disclaims any liability for incidental or consequential damages, which may result from the use of their products that are beyond its control. Employers should use this information only as a supplement to other information gathered by them and should make independent judgment of suitability of this information to ensure proper use and protect the health and safety of employees. Therefore, it is the user’s responsibility to thoroughly test the product in their particular application to determine its performance, efficacy, and safety. Nothing contained herein is to be considered as permission or a recommendation to infringe any patent or any other intellectual right.

Frequently Asked Questions

Frequently Asked Questions

NANOMYTE® BE-70E electrode sheets are made and shipped directly from NEI and are available for purchase in ready-to-ship packages of 2, 5, or 10 sheets (larger quantities available upon request). Standard Sublimed Sulfur electrode sheets are cast single-side on 5 inch x 10 inch sheets of aluminum, with 70% Sulfur (active material), 10% PVDF (binder), 20% Carbon Black (conductive carbon).

Where can I find pricing?

To request pricing or a quote, please fill out our quote form on the next tab. To request a quote for our cathode & anode powders, click here.

Where can I find the specifications?

A list of specification sheets for all of our electrode sheets can be found on the Battery Spec Sheets page »

Can any of the tape specifications be modified?

Yes, we can modify the active material loading, coating thickness, binder type (aqueous/non-aqueous), and binder content, as well as choice of current collector (additional fees may apply).

Where can I find the Material Safety Data Sheet?

A list of available Safety Data Sheets can be found on our MSDS page »

Do you provide any additional materials or compositions not listed?

If you are looking for a particular material or composition not found in our list of products, we may be able to make it for you. As a Specialty Materials company, NEI specializes in producing non-commodity cathode, anode, and solid electrolyte battery materials with compositions and powder morphologies that are not readily readily found in the market.

Can I have a free sample to see if it works for my application?

Unfortunately, we are unable to provide free samples for a number of reasons.

What is the minimum quantity order for your electrode sheets?

The minimum order quantity is 2 sheets per material composition and specification.

How can I place an order?

NEI sells and ships it’s battery materials directly from Somerset, NJ. We accept company and university purchase orders, or we can provide you with an order form. We can also accept orders through third-party buyers. For customers in Korea or Japan, we will put you in touch with our respective representative in your country, and you can place an order directly through them.

What kinds of payments do you accept?

NEI accepts several forms of payment:

  • Domestic – Checks (USD), ACH bank transfers, Credit Cards
  • International – Wire transfer, Electronic Funds Transfer (EFT), Credit Cards

Accepted Credit Cards: Visa, MasterCard, Discover, or American Express

What are your payment terms?

For most new customers, we require a prepayment or credit card, until a relationship is established. After that, we accept NET 30 payment terms, from date of invoice. Invoices are sent at the time of shipment.

How else can I contact you?

Email: You can send us a message, and one of our experts will be happy to answer any of your technical questions regarding our battery products and services.

Give us a Call: +1 (732) 868-3141

Business Hours: Monday – Friday, 8:30 am to 5:30 pm (ET)

Additional questions & answers can also be found on our Frequently Asked Questions Page.

Request Quote

Quote Request Form

To submit a request for pricing or a formal quote, please complete the Quote Request form and someone will be in touch with you soon. We can also customize tapes to your specifications – such as loading, thickness, binder, & collector – for an additional fee (select “Custom” under Specifications on the form).

NEI accepts purchase orders (check, wire, or bank transfer) and credit cards. Please note that by entering your information and submitting this form, you are agreeing to the terms of our privacy policy


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