Computer like paper

   Do you believe that in the near future, mobile phones will be as thin as business cards, and computers will be like a piece of A4 paper that can be taken away in a roll? Because in the future, batteries and disks are just a piece of plastic.
   British scientists have invented a plastic battery. The composition of the plastic battery is very simple. It is two layers of carbon fiber membrane with a layer of glass fiber membrane in between. The carbon fiber generates an electric charge when it is connected to the electrode, while the glass fiber is insulated and non-conductive. Thus, such a sandwich film becomes a battery that can be charged and discharged. When charging, the electrode is connected to the carbon fiber membrane, and positive charge will be accumulated at the positive electrode and negative charge will be accumulated at the negative electrode. When electricity is used, the positive and negative charges will be offset by the wire, and there will be current in the wire, so that the appliance can operate.
   The thin-film battery model created by the scientists for the first time only takes 5 seconds to charge, and this 5-second charge can power an LED bulb for 20 minutes. Of course, this model cannot be used as a battery. Researchers are looking for more superior films as the positive and negative electrodes of the battery, hoping to develop a practical thin-film battery with a large power storage capacity.
   Therefore, we imagine that the mobile phone in the future is like a business card, which is not a fantasy at all, because the battery that occupies the most volume in the mobile phone. If the thin-film battery is really put into use, the first thing that becomes flat is the mobile phone.
   In addition, plastic magnets have also been developed by scientists, using the property of a conductive polymer that under certain circumstances, the spins of electrons in molecules will be neatly oriented in the same direction. This plastic magnetic film can be used at room temperature, and scientists are thinking about using it to replace current computer hard drives. Therefore, in the future, both the battery and the hard disk of the notebook computer can become a film, and the notebook computer will become as thin as paper.