Ion selective GPure graphene polymer membrane for lithium-ion battery electrode protection

20-Mar-17

Grafoid Inc., a Canadian graphene R&D, investment and technology licensing company announced the development of its GPURE Graphene Polymer nano-porous membrane intended for next generation Li-Ion battery applications. Grafoid's largest shareholder is Focus Graphite Inc., owner of the Lac Knife high-grade graphite deposit in Quebec. Focus Graphite holds two off-take agreements with Grafoid to supply it with high-purity graphite for graphene application commercialization with joint venture partners.

The GPURE graphene polymer membrane (GPM) technology is the seventh graphene-based companion to the company's expanding GPURE Platform of new, high performing, ultra-thin materials for diverse industrial applications. The product was developed as a chemically inert, freestanding membrane using graphene composites to test ion selectivity using both monovalent and divalent ions. Ion selectivity is a key requirement for a semi permeable membrane in a Li-ion battery structure. By protecting the chemically sensitive electrode materials from unwanted chemical species GPURE GPM diffuses only energy harvesting monovalent ions such as Li+, Na+ etc. Conventional membranes lack such unique property.
On February 16, 2017 Grafoid unveiled its initial family of GPURE Platform membrane technologies spanning a range of scalable industrial applications requiring novel, disruptive solutions to create new products or enhance or supplant existing membrane technologies.

GPURE membranes include:

GPURE (A) - A high performing, free-standing membrane developed for water desalination applications

GPURE (B) - A stable, large area membrane developed for wastewater filtration suitable for very high temperature operating applications

GPURE (C) - A large area free-standing membrane developed for water filtration pre-treatment and may be suitable for use in gas separation applications and may be used as a lightweight component for automotive and sports equipment applications

GPURE (D) - A large area membrane that may be used for gas separation and sensing applications

GPURE (E) - A large area membrane intended for use in gas separation applications

GPURE (F) - May be applied as a graphene varnish for wood surfaces to protect against moisture, UV light and high temperatures

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