Nano One Develops Novel Coating Technique for a Longer Lasting Battery
April 19 2018 - 4:03AM
Dr. Stephen Campbell, Principal Scientist at Nano One (TSX-V:NNO)
(OTC:NNOMF) (Frankfurt:LBMB), announced today that Nano One has
developed coating technology that stabilizes cathodes for use in
advanced lithium ion batteries and has applied for patent
protection related to this coating technique.
“The innovation applies a coating to particles
of cathode material without adding steps to our process,” explained
Dr. Campbell, “and this reduces degradation and resistance between
the cathode and the electrolyte in lithium ion batteries. We are
encouraged by the preliminary results of our findings as this could
help solve long-standing degradation mechanisms, enable energy
dense battery designs, and increase the number of times that a
battery can be recharged over its lifetime.”
Figure 1: Nano One Coating
Process
To view an enhanced version of Figure 1, please
visit:
https://orders.newsfilecorp.com/files/3606/34129_a1524110455273_13.jpg
“The improvements are pronounced under warmer
operating conditions, such as those seen in electric vehicles,”
added Dr. Campbell. “This is particularly suited to the
commercialization of high energy and high voltage cathode
materials, where the elimination or reduction of cobalt requires
alternatives to enhance stability and durability.”
These advances have now enabled Nano One to
increase its collaborative work with European and Asian commercial
interests in the automotive supply chain, with the aim of
developing materials for next generation solid state batteries. A
detailed and technical explanation of the opportunity is provided
below.
A stable, ion conducting coating on the surface
of Nano One’s High Voltage Spinel (HVS) could solve interfacial
problems for both liquid and solid ceramic electrolytes by
inhibiting manganese dissolution in liquids and increasing
conductivity with solid state electrolytes. Nano One has developed
two types of coatings that stabilize the cathode when cycled at
55°C which could improve durability and stability without impacting
capacity.
HVS has attracted attention in the lithium
battery supply chain for two reasons. Firstly, the material
contains no cobalt and based on cobalt supply constraints, HVS
could reduce supply risk. The material contains primarily manganese
and a small portion of nickel, and thereby measurably lower costs.
Secondly, HVS has the highest and one of the most constant
discharge voltages, measuring 4.7 volts which offsets its lower
capacity. HVS also has high rate capability, which means that it
can be charged and discharged rapidly without losing capacity.
On its own, HVS degrades rapidly when cycled at
55°C which is a design criterion for electric vehicles. Also,
charging and discharging at 4.7 volts may cause the degradation of
common liquid electrolytes which are considered unstable above 4.2
volts.
One solution to the electrolyte issue is to
replace the liquid electrolyte with a solid polymer, glass or
ceramic fast ion conductor. The Solid-State Electrolyte (SSE) makes
dendritic cell failure and fire unlikely, and so enables the use of
a lithium metal anode, replacing the bulky graphite with an
ultra-thin anode and increasing the energy density of the cell.
This solid-state design opens the opportunity for a safer, denser
and high voltage lithium ion cell. Ceramic fast ion conductors such
as Li3.25Ge0.25P0.75S4 (ref Kanno and Murayama J. Electrochem.
Soc.;148(2001) A742) can have lithium conductivities as high as
current liquid electrolyte.
Unfortunately, the physics of the HVS/SSE
interface creates a highly resistive layer and high ionic
conductivity is not realized when cells are constructed. Nano One
has developed a coating that could increase ion conductivity with
SSE’s and passivate manganese dissolution in liquid electrolytes
while reducing electrolyte instability above 4.2 volts. This
innovation has led Nano One to apply for patent protection.
CEO Dan Blondal added “We are encouraged by this
innovation and we believe this technology could be of similar value
to nickel-rich low-cobalt NMC’s where instabilities, voltage
limitations and degradation are preventing commercial adoption in
lithium ion batteries. Work initiated with commercial interests is
growing and will focus on the integration of these materials with
other advances in high energy and solid-state batteries. We look
forward to sharing progress on these initiatives as they develop in
the future.”
Nano One Materials Corp.
Dan Blondal, CEO
For information with respect to Nano One or the
contents of this news release, please contact John Lando
(President) at (604) 669-2701 or visit the website
at www.nanoone.ca.
About Nano One:
Nano One Materials Corp (“Nano One” or “the
Company”) is developing patented technology for the low-cost
production of high performance battery materials used in electric
vehicles, energy storage, consumer electronics and next generation
batteries. The processing technology addresses fundamental supply
chain constraints by enabling wider raw materials specifications
for use in lithium ion batteries. The process can be configured for
a range of different nanostructured materials and has the
flexibility to shift with emerging and future battery market trends
and a diverse range of other growth opportunities. The novel
three-stage process uses equipment common to industry and Nano One
has built a pilot plant to demonstrate high volume production and
has preliminary engineering plans in place for full scale
production of a range of cathode materials. This pilot plant
program is being funded with the assistance and support of the
Government of Canada through Sustainable Development Technology
Canada (SDTC) and the Automotive Supplier Innovation Program (ASIP)
a program of Innovation, Science and Economic Development Canada
(ISED). Nano One also receives financial support from the National
Research Council of Canada Industrial Research Assistance Program
(NRC-IRAP). Nano One’s mission is to establish its patented
technology as a leading platform for the global production of a new
generation of nanostructured composite materials. For more
information, please visit www.nanoone.ca
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