Zentek provides information about the development of battery technology

GUELPH, ON / ACCESSWIRE / October 28, 2022 / Zentek Ltd. (“centek” or the “company“) (NASDAQ:ZTEK)(TSXV:ZEN), an intellectual property development and commercialization company, announces the start of a four-year, $1.6 million research project in collaboration with Professors Mohini Sain and Ning Yan known from the University of Toronto (“U of T”) and Ford Powertrain Engineering Research and Development Center (“PERDC”). Funding for the project includes $1.2 million from the Mitacs Accelerate program. Prof. Sain is the Ford Motor Canada Endowed Chair in Sustainable Materials, where he works in the field of light energy storage including cell chemistry and battery development for renewable fuels at PERDC, and Prof. Yan is Canada’s Tier 1 Research Chair in Sustainable Bioproducts. Collaboration with PERDC and testing at this facility is essential to demonstrate battery advances at a scale suitable for the automotive industry.

“The Canadian government and auto industry have committed to investing over $10 billion in battery manufacturing in 2022 alone. Given the significant push towards electrification in North America, we are pleased to be collaborating with the team at U of T, who have worked with a number of international battery manufacturers,” said Greg Fenton, CEO of Zentek. “This is an important research project to develop Next-generation graphene-based battery materials to potentially improve energy density, increase charge rates and improve battery safety.”

The project tries to test novel concepts to invent multifunctional materials used in car battery components such as anode, cathode, electrolyte and separator. Zentek will work with U of T researchers to provide and test advanced graphene materials, including Zentek’s patent-pending anode material developed by Dr. Michael Pope (see Zentek press release dated February 18, 2022).

update from dr Michael Pope’s group at the University of Waterloo
According to Zentek’s press releases dated November 22, 2018 and February 18, 2022, Zentek has worked with Dr. Michael Pope at the University of Waterloo to develop battery technology to improve anode performance.

A heavily studied area for the development of lithium-ion batteries (LIB) is the improvement of the anode material. Currently, EV anodes are made of graphite, which has a limited theoretical specific capacity of ~372 mAhg-1. Silicon (Si) has attracted a lot of attention as a substitute material mainly because of its high specific capacity of 4,200 mAhg-1, but also because of its low labor potential, low price and availability of silicon. However, the industrialization of silicon anodes is hampered by an important technical obstacle: silicon exhibits a huge volumetric variation (more than 300% in all dimensions) during charging and discharging. This feature is the root cause of three main problems:

  1. Poor cycle life due to anode self-crushing.
  2. Irreversible loss of capacity and low coulombic efficiency.
  3. Destruction and regeneration of the solid-electrolyte interface, consuming electrolyte and causing thickening and poor ion mobility.

By using silicon in the anode material, Dr. Pope addressed these issues and developed a patent-pending graphene-wrapped silicon anode material.

Key features of the graphene-wrapped silicon anode, as announced in February 2022, include:

  • With a practical mass load of 2.5 mg/cm2the electrode achieved 2.04 mAh/cm2 and retained 79% of that capacity after 200 cycles versus a lithium half-cell.
  • When combined with a commercial lithium iron phosphate cathode, the fully assembled battery retained 93.3% of its original capacity over 100 cycles.
  • Works with current lithium-ion batteries as a replacement for graphite1.

Since April, Dr. Pope’s team optimized the anode material, which now has a specific capacity of over 1,000 mAh/g and retains over 80% of its capacity over 320 charge-discharge cycles. The specific capacity of this material is a significant improvement over traditional graphite anodes; However, the lifespan still needs to be improved compared to typical EV batteries, which lose about 4% of their capacity over 1,000 charge-discharge cycles. The team from Zentek and Dr. Pope will continue to develop this technology with the goal of improving performance to meet the needs of the industry. Newly optimized chemistries achieve specific capacities of up to 1,500 mAh/g, an improvement of over 400% over graphite anodes. This significant improvement in energy density is complemented by impressive cycle stability. These performance tests were performed under accelerated protocols and need to be confirmed in standard tests.

Zentek filed a patent application under the Patent Cooperation Treaty on May 17th2022.

About Zentek Ltd.
Zentek is an IP development and commercialization company focused on the discovery, development and commercialization of novel products utilizing graphene and nanomaterials for use in the healthcare industry and beyond.

Zentek’s proprietary ZenGUARD™ coating is patent pending and has been shown to have 99% antimicrobial activity, including against COVID-19, for use in PPE and potentially HVAC systems and other industries. Zentek’s manufacturing facility for ZenGUARD™ is located in Guelph, Ontario.

For more information:
Ryan Shacklock
Tel: (306) 270-9610
E-mail: [email protected]

To learn more about Zentek Ltd. To learn more, please visit our website at www.Zentek.com. A copy of this news release and all material documents relating to the Company are available on ZEN’s SEDAR profile at http://www.sedar.com/.

Forward-Looking Statements
This press release contains forward-looking statements. Because forward-looking statements address future events and conditions, by their nature they involve risks and uncertainties. Although Zentek believes that the assumptions and factors used in preparing the forward-looking information contained in this press release are reasonable, undue reliance should not be placed on such information, which speaks only as of the date of this press release, and cannot be Any representations are made provided that such events will occur within the periods indicated or at all. Zentek disclaims any intention or obligation to update or revise any forward-looking information, whether as a result of new information, future events or otherwise, except as required by law.

Neither the TSX Venture Exchange nor its Regulation Services Provider (as that term is defined in the policies of the TSX Venture Exchange) accepts responsibility for the adequacy or accuracy of this release.

SOURCE: Zentek Ltd.


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