Paper battery is a thin, flexible energy production & storage device. This device is a combination of carbon nano-tubes with cellulose based paper. Paper batteries may be folded, cut for different applications without any loss of integrity or efficiency. The paper battery can act in two ways. A battery as well as a super capacitor. These non-toxic, flexible batteries can be used as a power source to next generation electronic devices, medical devices, hybrid vehicles, etc.
In embedded sensors, there has been a corresponding need for alternative power sources in the Internet of Things (IoT). The high cellulose content and lack of toxic chemicals in paper batteries make them environmentally friendly, as compared to the lithium ion batteries used in many present-day electronic devices.
Paper batteries can be used in humans and animals, including RFID tags, medicine-delivery systems and pacemakers.
The Future Power Source
Researcher’s have developed paper batteries of size slightly larger than a postal stamp that can produce energy that is enough to illuminate a small bulb. In our future, we can expect a stack of paper batteries that is able to power up a vehicle. These are the power source to next generation electronic devices, medical devices, pace makers, hybrid vehicles, etc.
Normal battery contains a lot of separate components. But a paper battery all these components are made to a single unit, which makes it more energy efficient.
The main components of a paper battery are carbon nano-tubes having thickness one millionth of a centimeter. The carbon is the reason for the thick black colour for the battery. These nano-tube films act as the electrodes which are embedded in cellulose based paper, soaked in ionic electrolytic liquid. The electrolyte does not contain any water content. So as there is nothing to freeze or evaporate, it can be used in any environmental conditions. The battery can produce power even if it is folded or cut.
To grow the nano-tubes on a silicon substrate and then filling the gaps in the matrix with cellulose. Combining the sheets together with the cellulose sides facing inwards, the battery structure is formed. The electrolyte is added to the structure.
Main advantage of the paper batteries are that it can be folded, cut or shaped for the required applications without any loss in its efficiency. If the battery is cut into half, the energy produced by them is halved. Stacking more than one paper batteries multiplies its power output. A postal stamp sized paper battery can able to produce about 2.5 volts of electricity. These batteries are also environment-friendly. Presence of cellulose and lack of toxic contents in paper batteries makes the device environmentally friendly as compared to the traditional lithium ion batteries.