Graphene - LCO Super BatteryNon-Flammable Advanced Lithium ion Battery

Lithium ion batteries have transformed the way society uses energy. They can hold a lot of charge in a small volume, allowing cell phones, laptop computers and even electric cars to exist. So, they are closely related to our

Product Overview

GRAPHENE POWERED

Nanotech Energy has figured out a way to build safer batteries while retaining competitive energy density and cycle life. Utilizing better electrodes made from the new wonder material – graphene, further enhanced by a proprietary nonflammable electrolyte, they provide the ultimate solution in safety.

Graphene is a single layer of carbon atoms and is one of the strongest materials ever known, yet is completely flexible, it can withstand the volume changes of the battery electrodes during charge and discharge, reducing the chances of an internal short circuit leading to a safer and more powerful battery. Graphene is also an excellent conductor of electricity, leading to batteries with lower internal resistance while providing an effective solution to overheating during battery charging.

Nanotech Energy has taken safety a step further by designing a non-flammable electrolyte that can withstand operation at high temperatures without catching fire. The new electrolyte, called OrganoLyteTM, is an organic liquid electrolyte that is eco-friendly and inexpensive to manufacture. We expect this technology to be critical in the future of consumer electronics and electric cars.

Powerful Non-Flammable Graphene Battery

daily lives but they have obvious safety issues. A battery, if shorted, could become a fireball bomb nearly impossible to extinguish using conventional techniques. In February 2018, the U.S. Consumer Product Safety Commission reported over 25,000 overheating and battery fire incidents involving more than 400 types of consumer products over a five-year period. Clearly, building safer batteries will be critical for the future of energy storage technology. Now, Nanotech Energy has developed a game changing non-flammable battery smothering the potential of a flame or explosion and providing a safer battery solution.

We use nail penetration test to simulate what happens to a battery in case of an internal short circuit. If a cell is shorted due to overcharging or during an accident, the energy stored in the battery is suddenly released initiating an unstoppable chain reaction called ‘thermal runaway’. During this event, the temperature rises rapidly, reaching a few hundred degrees within milliseconds, at which point conventional electrolytes cause the battery to burst into flames.

Nanotech batteries will not explode with nail penetration even after trying too hard. The improved properties of graphene electrodes combined with the thermal stability of OrganoLyte™ prevents the battery from catching fire, providing a promising solution to the long-standing safety problems of lithium ion batteries. In addition to its resistance to fire, the new battery has the ability to operate over a wide temperature range (from -20 to +60˚C) and is practical for use in all-weather conditions. We managed to develop this battery without adding to the cost or changing current battery manufacturing protocols. Surely, the new battery is an important advancement towards safer electronics.

Nail Penetration Test and Thermal Runaway

There are many reasons batteries catch fire, but in most cases it has to do with the battery design and electrolyte. Electrolyte plays an important role in the battery as it provides medium for the movement of lithium ions between the anode and cathode. The electrolyte is made by dissolving a lithium salt in the proper solvent whereas additives are often used to improve the cycling stability of the battery. Only electrolytes that meet stringent requirements can be used in a lithium ion battery. After trying a large number of solvents and additive materials, we came up with a new electrolyte, OrganoLyte™,that not only is stable but also is made from inexpensive materials, easy to manufacture and, of course, is non-flammable.

OrganoLyte™: Totally Safe, Non-Flammable Electrolyte

Upon exposure to a flame, traditional lithium ion electrolytes catch fire immediately whereas Nanotech proprietary electrolyte (OrganoLyteTM) can withstand operation at high temperatures

Traditional Battery Nanotech Battery

Traditional Electrolytes Nanotech ORGANOLYTE™

A traditional lithium ion battery catches fires immediately with nail penetration whereas Nanotech batteries remain intact.

Product Specifications

Nominal Capacity (at 20°C)Typ. 2000mAh

Opt. 2400mAh

Nominal Voltage 3.8V

Charging Method Constant CurrentConstant Voltage

Charging Voltage 4.2V

Charging Current Std. 500mA

Charging Time 4.2hrs.

Ambient Temperature

Charge 0 - 45°C

Discharge -20 - 60°C

Storage -20 - 50°C

Weight Typ. 44.8g

Dimensions (Max.)Maximum without tube

(D) 18.4mm

(H) 66.9mm

Volumetric Energy Density 460.6Wh/l

Gravimetric Energy Density 175.7Wh/kg

Internal ResistanceMeasured at freq. 1000hz 25mΩ

Cycling Life Tested 1250 Cycles for 81.6%

Cycling Life Projected >1400 Cycles for 80%

SafetyUses proprietary electrodes and non-flammable electrolyte, providing the

ultimate solution to safety.

Below is our initial specifications for our GEN2 batteries after nearly two years of development. The batterydesign is based on graphene and LCO chemistry. Efforts are currently underway to improve the cell characteristics including higher energy density, extended cycling life and further reduction of the internal resistance of the cells to enable faster charging.

Specifications

Dimensions (Typ.)Of Bare Cell

H 66.9mm

D 18.4mm

d 44.79mm

Dimensions

2.2

2.7

3.2

3.7

4.2

0 500 1000 1500 2000

Volta

ge (V

)

Discharge Capacity (mAh)

40C 20C 0C -10C -20 C

707580859095

100105

0 250 500 750 1000 1250 1500capa

city

rete

ntio

n (%

)

Cycle number

Nanotech Battery Traditional Battery

05001000150020002500

012345

0 0.5 1 1.5 2 2.5

Cur

rent

(mA)

C

apac

ity (m

Ah)

Volta

ge (V

)

Time (Hrs)Voltage Current Capacity

Charge Characteristics

Cycling Performance

2.5

3

3.5

4

4.5

0 500 1000 1500 2000

Volta

ge (V

)

Discharge Capacity (mAh)

0.2C 0.5C 1C

Discharge Characteristics

Charging: CC-CV 0.25C, 4.20V@125 mA cut off at 20°CDischarge: CC 0.2C, 0.5C, 1C, 2.7V at 20°C

Charging: CC-CV 0.5C, 4.20V@125 mA cut off at 20°CDischarge: CC 0.2C, 2.7V at 20°C

Charging: CC-CV 0.5C, 4.20V@125 mA cut off at 20°CDischarge: CC 0.2C, 2.7V at 20°C

Temperature Dependence

Charging: CC-CV 0.2C, 4.20V@125 mA cut off at 20°CDischarge: CC 0.5C, 2.7V at different temperatures

DISCHARGE CHARACTERISTICS TESTED OVER A WIDE TEMPERATURE RANGE: Nanotech battery works over a wide temperature range from -20°C to +40°C. This is superior to solid state batteries currently being developed by competitors that can only work at temperatures above 20°C, excluding it from operation at cold weather conditions.

CYCLE LIFE: While a traditional LCO technology from a leading lithium ion battery manufacturer drops to 80% cutoff within 300 cycles, our cells still maintains 81.6% of the initial capacity after 1250 cycles - projected at >1400 cycles.

Impedance Spectroscopy

-10

0

10

20

30

40

50

0 50 100 150 200

Z'' (

mO

hm)

Z' (mOhm)

Nanotech Battery

Traditional Battery

ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY: Nanotech battery show enhanced impedance characteristics compared to a traditional LCO battery, meaning that our cells exhibit faster ion transport characteristics, lower charge transfer resistance and potentially higher power density.