The document discusses paper batteries, which combine carbon nanotubes with conventional paper to create a flexible energy storage device. A paper battery acts as both a battery and supercapacitor, providing both steady power and bursts of energy. It is made by infiltrating aligned carbon nanotubes into cellulose paper soaked in an ionic liquid electrolyte. The combination of carbon nanotubes and paper allows the creation of a high-energy, flexible battery that can be twisted, folded or cut without losing performance.

2. Cellulose Paper
+ Nano-technology
An Overview of the battery technology that powers
our mobile society.
___________________________
?

3. INTRODUCTION
• The creation of the paper battery drew from a diverse pool of
disciplanes, requiring expertise in materials science, energy
storage and chemistry.
• In august 2007, a research team at Rensselear polytechnic
Institute led by Drs. Robert Linhardt, the Ann and John H.Broad
Bent, senior constellation professors of bio catalysis and
Metabolic engineering at Rensselaer, the Pulickel M.Ajayan,
Professor of materials science and engineering AND Omkaram
Nalamasu, professor of chemistry with a joint appointment in
Material science and engineering developed the paper battery,
also known as nano composite paper.

4. Battery Chemistry
Electrochemical reaction - a chemical reaction
between elements which creates electrons.
Oxidation occurs on the metals (“electrodes”),
which creates the electrons.
Electrons are transferred down the pile via the
saltwater paper (the “electrolyte”).
A charge is introduced at one pole, which builds
as it moves down the pile.

5. Recharge-ability & the
“memory effect”
Recharge-ability: basically, when the direction
of electron discharge (negative to positive) is
reversed, restoring power.
The Memory Effect: (generally) When a
battery is repeatedly recharged before it has
discharged more than half of its power, it will
“forget” its original power capacity.
Cadmium crystals are the culprit! (NiCd)

6. Lithium (Ion) Battery
Development
In the 1970’s, Lithium metal was used but its
instability rendered it unsafe and impractical.
Lithium-cobalt oxide and graphite are now
used as the lithium-Ion-moving electrodes.
The Lithium-Ion battery has a slightly lower
energy density than Lithium metal, but is
much safer. Introduced by Sony in 1991.

7. Advantages of Using
Li-Ion Batteries
POWER – High energy density means greater
power in a smaller package.
160% greater than NiMH
220% greater than NiCd
HIGHER VOLTAGE – a strong current allows it to
power complex mechanical devices.
LONG SHELF-LIFE – only 5% discharge loss per
month.
 10% for NiMH, 20% for NiCd

9. Disadvantages of Li-Ion
EXPENSIVE -- 40% more than NiCd.
DELICATE -- battery temp must be monitored
from within (which raises the price), and
sealed particularly well.
REGULATIONS -- when shipping Li-Ion
batteries in bulk (which also raises the price).
Class 9 miscellaneous hazardous material
UN Manual of Tests and Criteria (III, 38.3)

10. Environmental Impact of
Li-Ion Batteries
Rechargeable batteries are often recyclable.
Oxidized Lithium is non-toxic, and can be
extracted from the battery, neutralized, and
used as feedstock for new Li-Ion batteries.

11. The Intersection
“In terms of weight and size, batteries have become one
of the limiting factors in the development of electronic
devices.”
“The problem with...lithium batteries is that none of the
existing electrode materials alone can deliver all the
required performance characteristics including high
capacity, higher operating voltage, and long cycle life.
Consequently, the other way is to optimize available
electrode materials by designing new composite
structures on the nanoscale.”

12. “Nano”-Science and
-Technology
The attempt to manufacture and control
objects at the atomic and molecular level (i.e.
100 nanometers or smaller).
1 nanometer = 1 billionth of a meter (10-9)
1 nanometer : 1 meter :: 1 marble : Earth
1 sheet of paper = 100,000 nanometers

13. Nano + Li-Ion = ?
Nanotechnology and Li-Ion applications in the
commercial sector are apparent...
lighter, more powerful batteries increase
user mobility and equipment life.
DeWalt 36volt cordless power tools
Nanotechnology & Li-Ion applications in the
residential sector are not so obvious...
Micro-generated energy storage?

14. Micro-Generated
Energy Storage
Li-Ion batteries’ high energy density allows
batteries them to power complex machinery.
Li-Ion batteries recharge quickly and hold
their charge longer, which provides flexibility
to the micro-generator.
particularly helpful for wind and solar
generators!
Lightness, and power per volume allow for
storage and design flexibility.

15. • It is a hybrid energy storage device that
combines characteristics of batteries and
super capacitors.
• It takes the high energy storage capacity of
the battery and the high energy density of
the super capacitor which producing bursts
of extreme power.
What is Nanocomposite paper

16. Materials and Description
This energy storage device is based on two basic, inexpensive
materials: carbon nanotubes and cellulose. Also an ionic liquid
provides the third component: electrolyte. Engineered together,
they form nanocomposite paper. It is as thin and flexible as a
piece of paper—it can be twisted, folded, rolled and cut to fit
any space without losing any of its energy. The paper battery
can also be stacked to boost the total power output.

17. How it is made
• To create this paper we have to first dissolve the
cellulose in the ionic liquid and then infiltrate the
cellulose paper with aligned carbon nanotubes
which form the uniform film.
• Then it is solidified on dry ice, after this it is
soaked in ethonal to remove the ionic liquid and
dried in a vacume, which gives us our final product:
Nanocomposite paper.

18. BLOCK D IAGRAM

19. A paper battery is a flexible, ultra-thin energy storage and
production device formed by combining carbon nanotube s with
a conventional sheet of cellulose-based paper.
A paper battery acts as both a high-energy battery and super
capacitor , combining two components that are separate in
traditional electronics .
This combination allows the battery to provide both long-term,
steady power production and bursts of energy. Non-toxic,
flexible paper batteries have the potential to power the next
generation of electronics, medical devices and hybrid vehicles,
allowing for radical new designs and medical technologies.
Paper battery:

20. WHAT IS A CARBON NANOTUBE?
• A carbon nanotube is a tube-shaped material, made
of carbon, having a diameter measuring on the
nanometer scale.
• A nanometer is one billionth of the meter or about
one ten-thousandth the thickness of the human hair.
• The graphite layer appears somewhat like a rolled-
up chicken wire with a continuous unbroken
hexagonal mesh and carbon molecules at the
apexes of the hexagons.
• Carbon Nanotubes have many structures, differing in
length, thickness, and in the type of helicity and
number of layers.
• Although they are formed from essentially the same
graphite sheet, their electrical characteristics differ
depending on these variations, acting either as
metals or as semiconductors.

21. • As a group, Carbon Nanotubes typically have
diameters ranging from <1 nm up to 50 nm. Their
lengths are typically several microns, but recent
advancements have made the nanotubes much
longer, and measured in centimeters.
• . They are among the stiffest and strongest fibers
known, and have remarkable electronic properties
and many other unique characteristics.
• Carbon Nanotubes can be categorized by their
structures:
 Single-wall Nanotubes (SWNT)
 Multi-wall Nanotubes (MWNT)
 Double-wall Nanotubes (DWNT)

22. How Does Nanocyl Produce Carbon
Nanotubes?
• Nanocyl uses the "Catalytic Carbon Vapour
Deposition" method for producing Carbon
Nanotube Technologies.
• It involves growing nanotubes on substrates,
thus enabling uniform, large-scale production
of the highest-quality carbon nanotubes
worldwide.
• This proven industrial process is well known
for its reliability and scalability.

23. What are the Properties of a Carbon
Nanotube?
• The intrinsic mechanical and transport properties of
Carbon Nanotubes make them the ultimate carbon
fibers.
• The following tables compare these properties to
other engineering materials. Mechanical properties of
engineering fibers are:
Fiber
material
Specific
density
Energy Strength Strain at
break(%)
Carbon
nanotube
1.3 to 2 1 10 to 60 10
Carbon
fiber-PAN
1.7 to 2 0.2 to 0.6 1.7 to 5 0.3 to2.4
Carbon
fiber-PITCH
2 to 2.2 0.4 to 0.96 2.2 to 3.3 0.27 to 0.6
Glass 2.5 0.07/0.08 2.4/4.5 4.8
Kelvar*49 1.4 0.13 3.6 to 4.1 2.8
Steel 7.8 0.2 4.1 <10

24. • Transport properties of conductive materials are:
Material Thermal conductivity
(w/mk)
Electrical
conductivity
Carbon nanotube >3000 106 to 107
Copper 400 6*107
Carbon fiber-PITCH 1000 2 to 8.5*106
Carbon fiber-PAN 8 to 105 6.5 to 14*106
• Overall, Carbon Nanotubes show a unique combination of
stiffness, strength, and tenacity compared to other fiber materials
which usually lack one or more of these properties.
• Thermal and electrical conductivity are also very high, and
comparable to other conductive materials.

30. At Stanford, nanotubes + ink + paper =
instant battery
• Dip an ordinary piece of paper into ink infused with carbon
nanotubes and silver nanowires, and it turns into a battery or
super capacitor. Crumple the piece of paper, and it still works.
This is new way of storing electricity.
•Paper battery is the one that holds promise for new types of
lightweight, high-performance energy storage.
• ordinary paper could one day be used as a lightweight
battery to power the devices that are now enabling the printed
world to be eclipsed by e-mail, e-books and online news.

31. • While a conventional battery contains a number of separate
components, the paper battery integrates all of the battery
components in a single structure, making it more energy
efficient, Integrated devices.
• "The warm up time, power loss, component malfunction; you don't
get those problems with integrated devices. When you transfer
power from one component to another you lose energy. But you
lose less energy in an integrated device."
• You can implant a piece of paper in the body and blood would
serve as an electrolyte.
• The battery contains carbon nanotubes, each about one millionth
of a centimeter thick, which act as an electrode. The nanotubes are
embedded in a sheet of paper soaked in ionic liquid electrolytes,
which conduct the electricity.
.
How a paper battery works?

32. • Electricity is the flow of electrical power or electrons
• Batteries produce electrons through a chemical reaction
between electrolyte and metal in the traditional battery.
• Chemical reaction in the paper battery is between
electrolyte and carbon nanotubes.
• Electrons collect on the negative terminal of the battery and
flow along a connected wire to the positive terminal.
• Electrons must flow from the negative to the positive
terminal for the chemical reaction to continue.

33. • The flexible battery can function even if it is rolled up,
folded or cut.
• Although the power output is currently modest,
increasing the output is easy.
• "If we stack 500 sheets together in a ream, that's 500
times the voltage. If we rip the paper in half we cut
power by 50%. So we can control the power and voltage
issue."
• Because the battery consists mainly of paper and
carbon, it could be used to power pacemakers within the
body where conventional batteries pose a toxic threat.
• “We wouldn't want the ionic liquid electrolytes in our
body, but it works without them that is we can implant a
piece of paper in the body and blood would serve as an
electrolyte."

34. EXAMPLE:
• Let us take an example how the ionic liquid is used as an electrolyte
for the paper batteries.
• As the ionic liquid does not contain any water, there will be nothing to
evaporate and the use of ionic liquid in making paper batteries makes
the battery to withstand at extreme temperatures.
• Let us see how the sulphuric acid acts as an electrolyte by studying
its properties.
• Sulphuric acid or sulfuric acid is a strong mineral acid with the
molecular formula H2SO4. Its historical name is vitriol.
• It is soluble in water at all concentrations. It has many applications
and is a basic substance in the chemical industry.
• Polarity and conductivity of H2SO4:
• H2SO4 is a very polar liquid, having a dielectric constant of around
100.
• It has a high electrical conductivity caused by dissociation through
protonating itself, a process known as autopyrolysis.

35. Physical properties:
Mass fraction
H2SO4(%)
Density kg/L Concentration
mol/L
Common name
10 1.07 ~1 Dilute H2SO4
29 to 32 1.25 to 1.28 4.2 to 5 Battery acid
used in lead
acid batteries
62 to 70 1.52 to 1.60 9.6 to 11.5 Chamber acid
Fertilizer acid
78 to 80 1.70 to 1.73 13.5 to 14 Tower acid
Glover acid
95 to 98 1.83 ~18 Conc. H2SO4

36. Chemical properties:
• Reaction with water:
• The hydration reaction of sulfuric acid is highly exothermic.
• One should always add the acid to the water rather than the
water to the acid. Because the reaction is in an equilibrium that
favors the rapid protonation of water, addition of acid to the water
ensures that the acid is the limiting reagent.
• This reaction is best thought of as the formation of hydronium
ions:
• H2SO4 + H2O → H3O+ + HSO4−
• HSO4− + H2O → H3O+ + SO42−
• Because the hydration of sulfuric acid is thermodynamically
favorable, sulfuric acid is an excellent dehydrating agent.

37. Reaction with others:
• Concentrated sulfuric acid reacts with sodium chloride, and gives
hydrogen chloride gas and sodium bisulfate:
• NaCl + H2SO4 → NaHSO4 + HCl
• Dilute H2SO4 attacks iron, aluminium, zinc, manganese,
magnesium and nickel, but reactions with tin and copper require
the acid to be hot and concentrated.
• Lead and tungsten, however, are resistant to sulfuric acid.
• The reaction with iron shown below is typical for most of these
metals, but the reaction with tin produces sulfur dioxide rather than
hydrogen.
• Fe (s) + H2SO4 (aq) → H2 (g) + FeSO4 (aq)
• Sn (s) + 2 H2SO4 (aq) → SnSO4 (aq) + 2 H2O (l) + SO2 (g)
• These reactions may be taken as typical: the hot concentrated acid
generally acts as an oxidizing agent whereas the dilute acid acts a
typical acid.
• Hence hot concentrated acid reacts with tin, zinc and copper to
produce the salt, water and sulfur dioxide, whereas the dilute acid
reacts with metals high in the reactivity series to produce a salt
and hydrogen.

38. • Concentrated sulfuric acid has a very strong affinity for water. It is
sometimes used as a drying agent and can be used to dehydrate
(chemically remove water from) many compounds, e.g., carbohydrates.
• When the concentrated acid mixes with water, large amounts of heat are
released.
• Dilute sulfuric acid is a strong acid and a good electrolyte; it is highly
ionized, much of the heat released in dilution coming from hydration of
the hydrogen ions.
• The dilute acid has most of the properties of common strong acids. It
turns blue litmus red.
• It reacts with many metals (e.g., with zinc), releasing hydrogen gas, H2,
and forming the sulfate of the metal.
• It reacts with most hydroxides and oxides, with some carbonates and
sulfides, and with some salts. Since it is dibasic (i.e., it has two
replaceable hydrogen atoms in each molecule).
• The Fe3+ produced can be precipitated as the hydroxide or hydrous
oxide:
• Fe3+ (aq) + 3 H2O → Fe(OH)3 (s) + 3 H+

39. • Summary:
• In case of the lead-acid batteries, the RAYON serves as an
electrolyte. But the rayon is made with sulphuric acid. It
contains 33% of H2SO4 and with specific gravity 1.25, and is
commonly called battery acid.
• As the sulphuric acid is a strong acid and a good electrolyte, it
acts a one of the electrolytes in the manufacture of the paper
batteries.
• Due to its better properties that is physical and chemical
properties and the reactions with water and with other reagents,
keeping all this in consideration, the sulphuric acid is used as
one of electrolytes of the paper battery.
• Thus in case of other ionic liquid also, we must consider all
these properties, to make it use for the purpose of making
paper batteries

40. uses
 The paper battery combined with the structure of the nanotubes
embedded within gives them their light weight and low cost, making
them attractive for portable electronics, aircraft, automobiles and
toys (such as model aircraft), medical devices such as pacemakers.
The medical uses are particularly attractive because they do not
contain any toxic materials and can be biodegradable, a major
drawback of chemical cells.
 However, there is a caution that commercial applications may be
a long way away, because nanotubes are still relatively expensive
to fabricate. Currently, they are making devices a few inches in
size.
 In order to be commercially viable, they would like to be able to
make them newspaper size, a size which taken all together would
be powerful enough to power a car.

41. Applications
Cosmetic path: paper battery is set in iontophoresis patch for whitening
and wrinkles.
Medical path: paper battery is set in iontophoresis patch. It helps to
deliver functional drug i.e., local anesthesia, antichloristic,
anodyne, etc.. Into skin.
RFID tag: paper battery is useful to use as a power source of active
RFID tag.
Functional card: paper battery is possible to use as a power source of
melody and display card.
Micro processor; paper battery supply power to micro processor.

43. Paper battery offers future power
The black piece of paper can power a small light.
 Flexible paper batteries could meet the energy demands of
the next generation of gadgets.
The ambition is to produce reams of paper that could one day
power a car.
The paper battery was a glimpse into the future of power
storage.
 The versatile paper, which stores energy like a conventional
battery, can also double as a capacitor capable of releasing
sudden energy Bursts for high-power applications.

44. CONCLUSION
• This energy storage device is cost-effective because the
device can be able to be used in the smallest and most
diversly designed electronics. Such as cell phones, mp3
players and medical equipment.
• The reasearchers say that it can also be used in
automobiles and aircraft. But it has a poor processibility,
being that it is particularly insoluble of infuseble. Lastly,
the use of ionic liquid makes the device environmentally
friendly; a major concern in nanotechnology.

45. Finally, an interesting idea...
Background:
battery research results in annual capacity
gains of approximately 6%
Moore’s Law: The number of transistors on
a computer microchip will double every two
years. (40 years of proof!)
Idea: If battery technology had developed at
the same rate, a heavy duty car battery would
be the size of a penny.

46. Links to References
http://electronics.howstuffworks.com/battery.htm
http://everything2.com/e2node/Lithium%2520ion%2520battery
http://www.batteryuniversity.com
http://news-service.stanford.edu/news/2008/january9/nanowire-
010908.html
http://www.nano.gov/html/research/industry.html
http://en.wikipedia.org/wiki/Buckminster_Fuller
http://www.nanowerk.com/spotlight/spotid=5210.php