Lecture Series Assignment
Dr. Jodie L. Lutkenhaus from the Artie McFerrin Department of Chemical Engineering at Texas A&M gave a talk titled "Harnessing the Power of Plastics in Li-Ion Batteries". In this talk, she discussed the developments that are being made to create new forms of batteries. She covered how a battery works, specifically how a Li-ion battery works, using polymers to create batteries, and other interesting forms of batteries including "graffiti" batteries and batteries on fabrics.
She explained that batteries work because they contain three basic parts. An anode, or a negative region, a cathode, a positive region, and an electrolyte which separates the two. Because the anode is negatively charged, it has a buildup of electrons
…show more content…
The active material in the cathode would be either LiCoO2 , LiFePo4, or V2O5. Along with this, it of course contains a polymer and a binder which functions to insulate and hold everything together. It also contains some form of carbon to act as a conductive additive. Additionally polyethylene oxide is included to conduct lithium ions. Then a different polymer which "hates" the original polymer is added, and the two repel each other. Then a block copolymer, like V2O5, is added to force the two to interact. This therefore increase the energy and charge inside of the battery. The more polymer that is added, the more flexible the battery will be and therefore the more mechanical properties it will have.
Another topic she discussed was the development of "graffiti" batteries. This is essentially spray-paint that, when applied to the wall, can function as a battery. This is because the paint is made up of electrodes. Their functioning capacity depends on the discharge current, which is the rate in which the battery is discharged in relation to its maximum capacity. She explained that they have good stability and their charge storage arises from both polyaniline and reduced graphene
Electricity is an interesting subject. There is so much you can learn from it, like how our lights turn on or how we make cell phones. This is all a mystery until we finally get a little bit of information in our brains. I've just read two articles, "Energy Story" and "Conducting solutions". I also watched a video called Hands-on Science with Squishy circuits. I learned so much valuable information from these resources.
http://www.army.mil/article/79388/ (accessed March 16, 2014). Tiwari, G.N., and R.K. Mishra. Advanced Renewable Energy Sources. Cambridge, U.K.: RSC Publishing, 2011. U.S. Congressional Record - Senate.
She starts of by reminiscing about “graffiti’s beginnings” and how it was about “empowering people who had no voice” and graffiti was an “exhilarating chapter in the city’s history” (Grayson par. 5). This is appropriate for her audience because it reminds them why graffiti belongs in New York, and makes them happy to remember this beautiful artwork they remembered seeing. She then goes on to make her audience feel guilty for the negative conception they have about the artists and their art. She evokes that guiltiness when she says, “it is ludicrous to think that an exhibit at the Brooklyn Museum would have inspired gangs of graffiti goons … You know what inspires tagging? Bad architecture. Commercialism. The sanitized state of the city” (Grayson par. 9). It is appropriate because it makes the audience realize that this was a great thing for the city and they need to get it
An electrode is a component of an electric circuit that connects the conventional wiring of the circuit to a conducting medium such as an electrolyte or a gas. The electrically positive electrode is called the anode and the negative electrode the cathode. If an anode and a cathode are placed in a solution of an electrolyte and a source of direct current is connected between them, the positive ions in the
Finally (fourth transparency again), the loose set of values associated with the notions of achievement and reward allowed the Voltaic battery - this little understood artifact for which in 1800 nobody could predict the bright future of - to enjoy center-stage in a painting like this. Everyone was thus reassured - as I think we still are - of the worth of an inconspicuous, "philosophical" artifact like the battery. A worth that should induce us to include the battery in the long and varied list of valuable items rightly belonging to the legacy of the Enlightenment.
One thunderous afternoon on June 1752, Benjamin Franklin conducted what is known today as the “Kite Experiment”. He wanted to prove that if one object was electrical, the energy from that object could be transferred to another object, therefore being classified as electricity and lightning. With his son William, Ben took a string and attached the kite to it, then he attached an iron key to the kite. Next, they tied a thin metal wire from the key and put the wire inside a Leyden jar which stored all the electrical charge. His experiment profitably showed that his accusations were correct. Many other scientist tried the same experiment and were electrocuted, but Ben Franklin was the lucky one. He changed the world of science.
The first term that I noted during the movie was Conductive Polymers. Conductive polymers are almost always organic meaning a large class of chemical compounds whose molecules contain carbon. These polymers have extended delocalized bonds which are bonds found in a molecule that do not belong to a single atom or covalent bond. They are conjugated systems of double bonds and in a aromatic systems. The conjugated systems are atoms covalently bonded with alternating single and double bonds. When the electrons are removed or added into the valence bands the electrical conductivity increases. The conductive polymer has a low conductivity until the electron is removed from the valence band called (p-doping) or (n-doping) until it becomes more conductive. The movement of the charges is what is responsible for electrical conductivity. These polymers are plastic which are organic polymers and with mechanical properties such as flexibility and elasticity.
Metals contain a sea of electrons (which are negatively charged) and which flow throughout the metal. This is what allows electric current to flow so well in all metals. An electrode is a component of an electric circuit that connects the wiring of the circuit to a gas or electrolyte. A compound that conducts in a solution is called an electrolyte. The electrically positive electrode is called the anode and the negative electrode the cathode.
When we arrived, two of the group leaders, Sarah and Josh, went to go set up lunch, while my wife, Mary Ella, and I took the kids on a brief pre-tour. Since it was only half an hour before lunch, we decided to go down to explore one of the batteries. A battery is a small point outside the fort for artillery. Fort Knox is on a large hill overlooking the mouth of the river. At Fort Knox, there are two batteries located a little way down the hill from the fort. This allows the fort to fire on an enemy from multiple locations, and it allows for more artillery than the fort alone could hold.
Polyethylene (PE) is one of the most commonly used polymers which can be identified into two plastic identification codes: 2 for high-density polyethylene (HDPE) and 4 for low density polyethylene (LDPE). Polyethylene is sometimes called polyethene or polythene and is produced by an addition polymerisation reaction. The chemical formula for polyethylene is –(CH2-CH2)n– for both HDPE and LDPE. The formation of the polyethylene chain is created with the monomer ethylene (CH2=CH2).
Benjamin Franklin developed a theory that every object had an "electrical fluid". He believed that some objects had too much of this fluid, while others did not. By putting his theories together, he invented the electrical battery. It was made out...
Ever since I began studying science and mathematics at all levels of educations I have always had an interest in the production of useful materials. In the growing turmoil of today; a world full of global warming and diminishing resources, questions often arise in my mind such as, "can we make a more efficient, more durable and a renewable resource that will overshadow fossil fuels? and have less of an impact on our environment?" Up to now, I have not found a solution to these questions and answering these questions is a personal aspiration of mine which I aim to fulfil by achieving a degree in Chemical engineering and eventually I will contribute to the field in my own unique way. The debate surrounding sustainable energy fascinates me, having recently learned from personal research I have understood what an authoritative role chemists and chemical engineers play in the industry at the present time and how, by working as a team, they contribute to an improved future for the whole world. However, one of the main reasons that has single-mindedly driven me this far to want to study chemical engineering is a book I have read, “Beyond the Molecular Frontier: Challenges for Chemistry and Chemical Engineering” While reading this book, I had solidified my understandings of what chemical engineering is all about. Also, one of the main processes mentioned was polymerisation and is something I already study in A-level chemistry, it is something that not only interests me, but is a personal career aspiration of mine. Reading this book gave me a determination to be the person who helps improve the future of the industry and provide an answer to the questions I always ask myself by studying this degree.
The invisible bits of negatively charged matter that move between objects are called electrons. The words electron, electricity, and electronics all come from the Greek word for amber – elektron. The transfer of electrons explains the electric force that attracts the balloon to the wool. Rubbing the neutral balloon with the wool cloth allows some electrons to leave the wool and stick to the balloon.
Humans these days take electricity for granted. We don’t truly understand what life was like without it. Most young adults will tell you their life does not depend on electricity, but they aren’t fooling anyone. They all know that their life depends on electricity; whether it’s television, their phone, Google, or the lights in their house. We need to stop taking those things for granted and give credit where credit is due. That is why I chose to write about the scientists who contributed to the discovery of electricity, which then helped modern scientists fuel the electricity phenomenons we now have today.
The cell anode is usually a piece of the metal to be plated from solution; this enables the anode reaction of metal dissolution to replace the metal ion lost from solution by the cathodic decomposition. Factors There are many various factors that affect the mass deposited during electroplating:- 1). Current (A) - An increase in the amount of current increases the amount of substance deposited in a fixed amount of time, because there is more energy available to move ions/electrons to the cathode from the anode. A smaller current will pump fewer copper ions from the anode to the cathode in the same amount of mass gained on the cathode is lower. 2).