A paper battery is basically a device which can act both as a capacitor and as a battery. It is a flexible, light weight device made up of carbon nano tubes emboldened on paper (cellulose). It is basically formed by combination of cellulose with carbon nanotubes. It consists of infusion of carbon nanotubes with paper consisting of an ionic liquid as an electrolyte.
The major components
- Carbon Nanotube (CNT) used for cathode terminal
- Lithium metal (Li+) used for anode terminal
- Different types of electrolytes that include blood, urine, and sweat (which are termed as bio-electrolytes)
- Paper (Cellulose-Separator)
Principle
- This battery produces electricity in the same way as the conventional lithium-ion batteries, but all the components that have been incorporated into are lightweight, flexible sheet of paper.
- These devices are formed by combining cellulose with an infusion of aligned carbon nanotubes.
- The electrolyte and the ions that carry the charge can be varied depending the use of the battery.
- A conventional Li-ion battery can be incorporated in cellulose-nanotube.
Properties
- excellent porosity
- biodegradability
- non-toxic
- recyclability
- high-tensile strength and good absorption capacity
Advantages 
- Unlike the conventional batteries, these battery can be used by folding, cutting, and rolling.
- This battery functions as a battery as well as a capacitor.
- The battery is a modern storage device with ultra-thin in size.
- The battery can generate electrical energy of 1.5V.
- The output voltage of paper battery can be customized based on requirement.
Disadvantages
- The carbon nanotubes used in paper battery are very expensive.
- The battery wastage may damage lungs if it is inhaled.
- The e-wastage is generated by these batteries.
Applications
In electronics, these batteries are mainly used in the electronic devices such as mobile phones, calculators, laptop batteries, digital cameras and also in the wireless communication devices like mouse, Bluetooth, keyboard, speakers and headsets.
SUMMARY
After analysis of paper battery we can conclude that the major component of paper battery is CNT. If the cost is kept economical the batteries will revolutionize the electronics industry. With these batteries we can predict a whole a new world of possibilities and endless applications which will one day change our daily lives.
