[tt] Next Big Future - Enerdel Technologies targets halving the cost of lithium ion batteries
Eugen Leitl
<eugen at leitl.org> on
Mon Sep 1 09:46:05 UTC 2008
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Subject: Next Big Future - Enerdel Technologies targets halving the cost of lithium ion batteries
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"[2]Next Big Future" - 1 new article
1. [3]Enerdel Technologies targets halving the cost of lithium ion
batteries
2. [4]More Recent Articles
3. [5]Search Next Big Future
[6]Enerdel Technologies targets halving the cost of lithium ion batteries
[7]Ener1 Inc's battery division Enerdel believes that they can reduce
the cost of lithium ion batteries to half of their current cost when
produced in high volume. This will mean a payback of two years instead
of eight years for making a car a hybrid and having the fuel savings
pay for the extra costs.
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Chemistry Advantages
EnerDel believes longevity, safety and cost are the most important
elements demanded by the automotive customers. To achieve these key
attributes, EnerDel is convinced that a non-graphite anode material is
key for success in automobile battery business. EnerDel has developed
our own Lithium Titanate Anode material in collaboration with Argonne
National Laboratory (ANL) for HEV applications. We have also developed
a Hard Carbon anode lithium ion battery for PHEV/EV applications.
Mechanical Design Advantages
The mechanical design inside the EnerDel cell is a stack design where
the electrodes are stacked on top of each other, i.e. multiple anode
and cathode pairs of electrodes are stacked on top of each other. This
differs markedly from almost all lithium ion batteries in the market
today, including batteries for notebook computers, mobile phones,
power tools, etc., which are using a wound design, i.e. where one
anode and one cathode electrode of the same lengths are wound up.
Manufacturing Process Advantage
EnerDel's stack design in the cell is accomplished with a fully
automated mass production process.
[14]In separate work, the latest development in biology-based circuity
comes courtesy of researchers at MIT who have crafted a battery with
an anode wired-up using a virus. These nanoscale batteries can be
[15]printed onto most conducting surfaces.
The virus' coat of proteins self-assembles from thousands of
identical proteins, which allows researchers to manipulate the
protein structure in order to allow the virus to serve as a
template for other materials. In this case, a few tweaks to the
protein's sequence allowed it to interact with cobalt oxides, which
can function as anodes in lithium-based batteries.
But an anode is only part of a functional battery. The new paper
describes a process that allows the battery components to largely
self-assemble. The researchers built a template of
polydimethylsiloxane that contained round posts roughly five
microns in diameter. On top of the post, they deposited a dozen
alternating layers of two solid electrolytes: polyethlenimine and
polyacrylic acid. These layers formed a cap on the substrate about
150nm thick. On top of that, the researchers deposited the M13
virus, dipped in a cobalt oxide solution that converted the viral
layer into the nanobattery's anode.
Less than a centimeter's worth of the batteries managed to hold
anywhere from 375 to 460 nAh, depending on the charging conditions.
These batteries aren't likely to be solutions for big problems,
like laptop batteries, but they could find a niche in the world of
miniaturized, low-power devices.
[16]the recent virus battery abstract:
Stamped microbattery electrodes based on self-assembled M13 viruses
The fabrication and spatial positioning of electrodes are becoming
central issues in battery technology because of emerging needs for
small scale power sources, including those embedded in flexible
substrates and textiles. More generally, novel electrode
positioning methods could enable the use of nanostructured
electrodes and multidimensional architectures in new battery
designs having improved electrochemical performance. Here, we
demonstrate the synergistic use of biological and nonbiological
assembly methods for fabricating and positioning small battery
components that may enable high performance microbatteries with
complex architectures. A self-assembled layer of virus-templated
cobalt oxide nanowires serving as the active anode material in the
battery anode was formed on top of microscale islands of
polyelectrolyte multilayers serving as the battery electrolyte, and
this assembly was stamped onto platinum microband current
collectors. The resulting electrode arrays exhibit full
electrochemical functionality. This versatile approach for
fabricating and positioning electrodes may provide greater
flexibility for implementing advanced battery designs such as those
with interdigitated microelectrodes or 3D architectures.
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