News
posted on
Oct 19, 2017 08:05AM
Hydrothermal Graphite Deposit Ammenable for Commercial Graphene Applications
Tokyo Tech Identifies Key Reasons for the Ease & High‐Yield Conversion of Zenyatta’s Albany Graphite
to Graphene
Thunder Bay, Ontario – 19 October 2017 – Zenyatta Ventures Ltd. (“Zenyatta” or “Company”) (TSXV:
ZEN) announces testing results from the Tokyo Institute of Technology (‘Tokyo Tech’) in Japan have
identified key reasons for the ease and high‐yield conversion of Albany graphite to graphene.
One of the greatest challenges for commercializing graphene in various applications, since its discovery
at the University of Manchester, is how to produce high‐quality material, on a large scale at low cost, in
a consistent manner.
Dr. Yoshihiko Arao, Assistant Professor in the Department of Chemical Engineering at Tokyo Tech, stated
“Zenyatta’s high‐purity graphite material was tested by our scientific team on mechanical conversion to
graphene and discovered it converted much easier and with higher yields of graphene than our
reference material. We have tested many types of natural graphite but found Zenyatta’s graphite
material to have better exfoliation performance and produce better graphene particles than the
reference material. We believe that this is an extraordinary, unique material and we would like to carry
out further collaborative work with Zenyatta on graphene applications.”
Research by Dr. Arao and Professor Dr. Masatoshi Kubouchi at Tokyo Tech has shown the following
significant test results:
1. D‐Spacing measurements of Zenyatta carbon material is relatively larger compared to three (3)
other commercially available high purity graphite samples. D‐spacing is unique to all crystals
and described as the distance between two (graphene) atomic layers or interlayer spacing. The
Albany graphite also exhibited some turbostratic structure or natural irregular stacking.
Importantly, these factors have contributed to the ease of conversion and greater yield of high quality
graphene from Albany graphite. This can be attributed to the unusual geologic mode of formation
(igneous hydrothermal process) which accounts for the superior purity, crystallinity and overall quality
of the graphite found in this unique deposit.
2. Graphene exfoliated from Albany graphite showed the highest aspect ratio with an average
thickness of 1.43 nanometres or 1‐4 graphene layers. Also, the optical absorbance of the
Zenyatta graphene dispersion was 2‐10 times better than the other 3 tested reference samples
which demonstrate concentrated graphene dispersion can be obtained.
This further confirms the reason for success on graphene development initiatives, especially in
composites, from other collaborators in UK, Canada, USA and Israel. We have established that
Zenyatta’s graphite converts (exfoliates) easily to graphene, producing mono‐layer to tri‐layer material,
has excellent dispersion properties and is highly suitable for many graphene and graphene‐oxide
applications.
Aubrey Eveleigh, President and CEO for Zenyatta stated, “The obstacle to widespread use of graphene
since discovery is the high manufacturing cost. A lower‐cost and disruptive approach is to use high‐
purity natural graphite, like Albany material, as the starting point to get easier and higher yields of
graphene in an environmentally friendly manner. We are eager to start another phase of testing at a
world class facility like Tokyo Tech using our high‐purity graphite material for various innovative
graphene applications.”
Tokyo Tech is the top national university for science and technology in Japan with a history spanning
more than 130 years. It is the largest institution for higher education dedicated to science and
technology, and is considered to be one of the most prestigious universities in Japan and the world.
Tokyo Tech continues to develop global leaders in the fields of science and technology, and contributes
to the betterment of society through its research, focusing on solutions to global issues. The Institute's
long‐term goal is to become the world's leading science and technology university. Characterization of
Zenyatta’s natural graphite was completed at Tokyo Tech using a conversion of mechanical, liquid phase
exfoliation, followed by testing methods comprised of SEM observation, X‐ray diffraction, Raman
spectroscopy, atomic force microscopy (AFM) and optical absorbance analysis.
Zenyatta Ventures Ltd. continues to develop its large and unique Albany graphite deposit in Ontario,
Canada. The Company’s highly crystalline graphite deposit is situated 30 km north of the Trans‐Canada
Highway, power line and natural gas pipeline near the communities of Constance Lake First Nation and
Hearst. A rail line is located 30 km away with an all‐weather road approximately 10 km from the
graphite deposit. The world trend is to develop products for technological applications that need
extraordinary performance using ultra‐high purity graphite powder and graphene at an affordable cost.
High‐purity and highly crystalline carbon material is gaining prominence in the cleantech sector at a time
when Zenyatta discovered an extremely rare igneous hosted, fluid derived graphite deposit. Albany
graphite can be upgraded with the optimum particle size without the use of aggressive acids
(hydrofluoric) or high temperature thermal treatment therefore having an environmental advantage
over other types of upgraded high‐purity graphite material.