2000 km on a Single Charge: Brighsun's Li-S Batteries to Enter Industrial Trials
2020年4月21日 - 08:30AM
JCN Newswire (英)
FRANKSTON, AUS, Apr 21, 2020 - (ACN Newswire) - Lithium
batteries will soon power Electric Vehicles (EVs) traveling 2,000
km on a single charge, say the team at Brighsun New Energy. The
company is preparing for industrial trials later in the year for a
range of lithium-sulfur (Li-S) batteries that can power a cell
phone for over a week and can theoretically travel close to 2,000
km on a single charge. The revolution is underway.
Lithium Sulfur (Li-S) Battery Technology Breakthrough
Through nearly 8 years of research, the Brighsun team developed
lithium-sulfur (Li-S) batteries with an energy density 5-8 times
higher than conventional secondary batteries. According to results
from an internationally accredited testing agency (SGS), Brighsun's
new technology allows an Li-S battery to keep 91% of its initial
capacity after 1,700 cycles at a rate of 2C (being fully
charged/discharged in 30 mins). That means the capacity decay per
cycle is as low as 0.01%. Even at a more aggressive rate of 5C
(being fully charged/discharged in 12.5 mins), Brighsun's Li-S
battery retains 74% of its initial capacity after 1,000 cycles
(capacity decay per cycle of 0.026%). The cathode energy density
for the 1th cycle after activation at charge rate of 1C is
2103.8Wh/kg.
Driven by the growing markets world-wide for EVs, the battery
industry has explored a range of chemical combinations: lithium
iron phosphate, lithium cobalt oxide and, currently, nickel
manganese cobalt. However, current battery systems still suffer
from the major disadvantages of relatively low energy density, high
raw material costs and secondary pollution during recycling.
A Game Changer
Brighsun's advanced Li-S chemistry, offering high energy density
and resultant low raw material costs, will be a game changer in the
EV industry. Li-S batteries also have the potential to become the
most promising energy storage systems for future railways, ships
and airlines. Industries such as electric supply grid storage,
mobile phones, drones and AI will also benefit from dramatically
higher energy density storage provided by Brighsun's new battery
system.
Companies in the US, Germany, Korea and China have been developing
Li-S batteries and have achieved promising breakthroughs. However,
these systems still face a number of challenges, including volume
expansion of cathode materials during cycling, the shuttling effect
of polysulfides, and the dendritic growth of lithium on the anode.
This results in shorter cycling life and poor fast-charging
capability, both major obstacles to their application in the world
automotive industry.
Brighsun's Revolutionary Approach
Brighsun has patented Li-S battery technology that prevents the
generation of polysulfide on the sulfur cathode and effectively
suppresses dendritic growth of Li on the anode Li-S, paving the way
for Li-S battery use in EVs.
The company has already developed processes for the production of
cathode materials (electrolytes, separators and lithium sheet
anodes), of which the core materials (anodes, electrolytes, and
separators) can be produced in batches. Trial production of
high-power cells with an expected energy density in excess of 1,000
Wh/kg is about to begin. Brighsun is also developing a solid-state
electrolyte compatible with its Li-S system, aiming at further
improvements in the cycling life, energy density and safety of its
Li-S batteries.
Plentiful and Low Cost Battery Materials
The main raw materials for Brighsun's Li-S batteries are widely
available in Australia, with a supply sufficient for hundreds of
years. Indeed, at under AUD100 for 1kWh, the expected production
cost of Brighsun-branded 2U Li-S batteries is lower than
conventional lithium ion batteries - providing a major boost to the
development of electric vehicle and related industries in Australia
and around the world.
Going Forward
Brighsun is currently in discussion with potential investors in the
large-scale trial production of Li-S batteries. The development
process for large-scale production is expected to be finished by
end-2020, followed by the mass production of Li-S batteries.
Brighsun's new energy-dense Li-S battery is expected to accelerate
EV take-up around the world, spurred by dramatically improved
single-charge travel performance, low cost and long life. Combined
with the relative simplicity of EV design compared to internal
combustion engine/hybrid vehicles, consumers and the industry alike
are set to benefit from lower cost, emission-free transport. At the
same time, Brighsun's 2U Li-S batteries offer huge benefits to the
mobile phone and solar-electric storage industries, generating
dramatic performance improvements in both.
About Brighsun EV Group
Brighsun sees its EV technology as a contribution to society's need
for more cost effective and less polluting transport. Our Head
Office is in Australia and focuses on using new energy technology
to produce market ready solutions. Our intellectual property is
fully owned by Brighsun and patented in Australia. Our technology
comes from our research & development, critical to maintaining
our competitive edge. We are building a production base built on
our world leading technologies in lithium batteries, and expanding
our Zhejiang battery production. For information, please visit
http://www.brighsun.com/Index_En.asp.
Brighsun
Sherry Xiao
Frankston, Australia
kevinhuang@brighsun.com
http://www.brighsun.com
Source: Brighsun New Energy Pty Ltd
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