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Graphene Battery Energy Density- Introduction, Comparison and Checking
It won’t be wrong to give credits to technology for changing the absolute course of our lives. Thanks to technology that we can now think of electric cars. Over the years, we have seen dynamic changes in technology due to which now we do not have to depend upon any power station to get our electronics charged. Batteries were invented way back, and they have been acting as our savior ever since.
Over the years, we have seen different kinds of batteries coming into the market. Each of them is different in its internal chemistry, energy density, shape, functions, and much more. But now graphene batteries are all set to come into the markets, and if reports are to be believed, then it won’t be incorrect here to mention that with the introduction of graphene batteries, the scenario of future transportation will become even smarter and faster.
What is the energy density of graphene?For years, we have used Lithium-ion batteries in almost all electronic appliances, but soon we might try our hands on the latest battery technology, which would be based on a very amazing material, i.e., graphene. In simple terms, the two-dimensional structure of the graphite is known as graphene. It is the material that is also used to make pencils. When it comes to battery, it won’t be wrong here to highlight that with graphene; we can make some of the most amazing internal chemistries of the battery.
For those who have no idea about the qualities of graphene, it is important for them to know that graphene is approximately 100 times more strong than steel. Only two atomic layers of the graphene material holds the power to stop even a bullet. Above all of this, it a great conductor of heat and electricity. And since it is extremely light in weight, super powering batteries can be made with graphene. You will be astonished to know that from power tools to all the electric gadgets including cars will be able to charge at a faster speed, they could hold more amount of power and will be available at competitive prices as well.
When it comes to the energy density of the graphene battery, the numbers will surely be going to impress all the tech-savvy persons. In comparison to the good old lithium-ion batteries, graphene batteries will have a much higher energy density. This is because lithium-ion batteries tend to store up to 180 Wh per kilogram; on the other hand, graphene batteries are capable of storing up to 1000 Wh per kilogram. Therefore, now you can have a higher energy density battery pack in the same size as any other battery.
Other than higher energy density, there are many other advantages of graphene batteries. Some of them are listed down below; in order to make a good comparison, you can consider these points:
As mentioned earlier, graphite is extremely light in weight; if you stack 3 million layers of graphene, then you are going to get 1 mm thickness. Therefore, it will be justified here to mention that graphene batteries will not going to take much space in any electric device
All the batteries which are prevailing in the market right now are not able to handle more than 500 charge cycles; on the other hand, graphene batteries can easily handle approximately 1500 charge cycles
Graphene batteries respond to the concept of fast charging technology in a much advanced manner as it will take only approx. 20 minutes to charge a 3000 mAh cell with a 60-watt charger
Graphene batteries dissipate less heat as compared to other batteries because of the fact that graphene is a good conductor of heat
When it comes to safety and thermal management then also graphene-based batteries are regarded best
What battery has the highest energy density?Before moving to the highest energy density battery, it is vital for you to know about its significance. Therefore, in order to understand this concept in a simple manner, let’s say if the energy density of a storage device is larger than another storing device then, it means it can be smaller in size and/or weigh much less while containing the equal amount of energy. Due to this, technologies such as mobile phones, require higher energy density because it is compact in size and light in weight.
Batteries with higher energy density are able to supply energy over a much longer period of time. That is why higher energy batteries are required for portable electronics or vehicles, including electric cars. As of now, after the introduction of graphene batteries, the highest energy density battery is graphene battery because it can store up to 1000 WH per kilogram due to the lightweight of graphite. In order to draw the comparison, we have mentioned a few cell chemistries down below with their energy density. You can consider them to evaluate which is the high energy density battery:
Lead-Acid: 30 To 40 WH/ Kg
Zinc-Carbon Battery: 36 WH/ Kg
Mercury Oxide-Zinc Battery: 99 To 123 WH/ Kg
Nickel-Iron Battery: 19 To 25 WH/ Kg
Nickel-Cadmium Battery: 30 WH/ Kg
Lithium-Manganese Dioxide Battery: 150 To 330 WH/ Kg
Lithium-Carbon Monofluoride: 260 To 780 WH/ Kg
Lithium-Cobalt Oxide Battery: 195 WH/ Kg
How do you find the energy density of a battery?The amount of energy that can be stored in the given mass of a battery is known as its energy density. Generally, energy density can be expressed in two methods; both of them are mentioned down below:
Volumetric Energy Density: It is the amount of energy a system can contain as compared to its volume. It is expressed in the form of watt-hours per liter, i.e., Wh/L or Mega joules per liter, i.e., MJ/L
Gravimetric Energy Density: It is the amount of energy that a system can contain as compared to its mass. It is expressed in watt-hours per kilogram, i.e., WH/ kg, or Mega joules per kilogram, i.e., MJ/ kg