In recent years, electrochemical supercapacitors (ECs) have been extensively studied as attractive energy storage devices. They have potential applications in portable electronics and electric vehicles because of their high power energy densities and long cyclic life [8, 101, 102]. Based on the nature of the charge-storage mechanism and active materials, electrochemical capacitors can be classified into two types: electrochemical double layer capacitors (EDLCs) and redox supercapacitors (pseudocapacitors). EDLCs utilizing carbon-based active materials, such as activated carbon (AC) and carbon nanotubes (CNTs) with charge stored at electrode-electrolyte interface, are currently the most commonly used devices [2]. On the other hand, pseudocapacitors …show more content…
However, cobalt hydroxide prepared by this technique demonstrated very low specific capacitance (SC) of less than 400 F g−1. Since the major limitation of Co(OH)2 is low conductivity, S. Chen et al. initiated the idea of fabricating graphene-Co(OH)2 nanocomposites by the use of some reducing agents such as HS– and H2S [117]. As a result, this research group managed to achieve specific capacitance of 972.5 F g-1 which is much higher than each individual counterpart. However, in above study, uniform distribution of Co(OH)2 is believed to be the main challenge. On the other hand, most of the reports were more concerned about the enhancement of SC values. Insufficient attention was paid to capacitance degradations of metal oxide/hydroxide materials at high current densities [118]. Our group previously reported the utilization of lyotropic liquid crystal (LLC) template in potentiostatic electrodeposition of Co(OH)2 which led to significant improvement in electrochemical performance [119]. Indium-tin oxide nanowire is known to possess excellent electrical properties and thermal stability [120, 121] which allows great applications in the field of electronics. On top of that, titanium was chosen as current collector owing to its well-known excellent mechanical, chemical and thermal stability as well as abundance in the Earth’s crust. In this study, we first prepared indium-tin oxide nanowires (ITO NWs) by chemical vapor deposition (CVD) on titanium substrate, and then different mesoporous structures such as Co(OH)2 nanoflake (NF) were deposited onto the indium-tin oxide nanowires (ITO NWs) by electrodeposition through lyotropic liquid crystal (LLC) template. In addition, mesoporous Co(OH)2 film, directly deposited on pure Ti substrate, was prepared for
Ewald Georg von Kleist is a German scientist who created the capacitor in November of 1745. Regrettably, Kleist did not have the proper paper work to claim in the records that the design of the capacitor was his idea. Many months later, a Dutch professor named Pieter van Musschenbroek created the Leyden jar, the world’s first capacitor (on record). It was a simple jar that was half filled with water and metal above it. A metal wire was connected to it and that wire released charges. Benjamin Franklin created his own version of the Leyden jar, the flat capacitor. This was the same experiment for the more part, but it had a flat piece of glass inside of the jar. Michael Faraday was the first scientist to apply this concept to transport electric power over a large distance. Faraday created the unit of measurement for a capacitor, called Farad.
Football is very popular sport in America with the hard hitting and major tackles. But when those two factors come into play there's always injuries such as concussions. Concussion is when a human has traumatic force hit to the skull in which the brain swells up in the skull leaving no space causing blackouts and even comas.This brings to the question should there be better padding for the football helmet?
These three sources "Energy Story", "Conducting Solutions", and a video clip "Hands-On Science" share explanations, demonstrations, and descriptions on science experiments to accomplish its purpose. In "Energy Story," it explains the use of electricity people use in their homes, and what makes it. In the video "Hands-On Science" by AnnMarie Thomas, it shows how to make homemade playdough and compare it to store brand playdough. In "Conducting Solutions" by Rodney Schreiner, it shows how certain ions have positive and negative charges. These three sources based on science show us different experiment and how to accomplish them.
Schlesinger, Mordechay. "Electrochemistry Encyclopedia." Electroplating. Department of Physics, University of Windsor, Sept. 2002. Web. 17 Nov. 2013.
After reading the circuit by Francisco Jimenez, it talks about the struggles of an immigrant, and the obstacles they have to overcome. I can’t really relate because I never had to move from place to place, and have to deal with a new language. Even though I have always wanted to travel and move to a different country. But over the last year I’ve moved from Atlanta to Douglas, and having to adapt to new cultures, types of people, and just the new vibes was really different. Back in elementary school I had a friend named Johnny and he was an immigrant. I feel like he could relate to this story a lot more since he didn’t really know English and his family heavily struggled financially. It was difficult for teachers even trying to
This paper is a discussion of the role played by the ideals of the Enlightenment in the invention and assessment of artifacts like the electric battery. The first electric battery was built in 1799 by Alessandro Volta, who was both a natural philosopher and an artisan-like inventor of intriguing machines. I will show that the story of Volta and the battery contains three plots, each characterized by its own pace and logic. One is the story of natural philosophy, a second is the story of artifacts like the battery, and the third is the story of the loose, long-term values used to assess achievement and reward within and outside expert communities. An analysis of the three plots reveals that late eighteenth-century natural philosophers, despite their frequent celebration of 'useful knowledge,' were not fully prepared to accept the philosophical dignity of artifacts stemming from laboratory practice. Their hesitation was the consequence of a hierarchy of ranks and ascribed competence that was well established within the expert community. In order to make artifacts stemming from laboratory practice fully acceptable within the domain of natural philosophy, some important changes had yet to occur. Still, the case overwhelmingly shows that artifacts rightly belong to the long and varied list of items that make up the legacy of the Enlightenment.
These reasons are why Lithium-Ion Batteries are some of the most viable options when designing new gadgets. But, the structure of these batteries are why these batteries are being used for new gadgets. A Lithium-Ion Batt...
Electrolyte can be defined as the aqueous or molten substances which when dissolved in a solvent dissociates into ions and can transmit negatively charged ions.
24. Ujjal Kumar Sur, “Graphene: A Rising Star on the Horizon of Materials Science,” International Journal of Electrochemistry, vol. 2012, Article ID 237689, 12 pages, 2012. doi:10.1155/2012/237689
Haynes, William M.., and David R. Lide. CRC handbook of chemistry and physics a ready-reference book of chemical and physical data : 2012-2013. 93e édition. ed. Boca Raton (Fla.): CRC Press, 2012. Print.
The invention and development of the battery would have to be one of the most significant in human history. Without batteries, the world would be a very different place. Everything would be plugged in and nothing would be mobile. There are many types of batteries that work in many different ways, but they all have the same common goal of making lives easier. Some examples of these batteries are lithium-ion, lead-acid, and nickel-cadmium.
I am not going to lie this class was my hardest it felt like I didn’t know what was going on at all time. It not like I wasn’t learning anything in there is just that I didn’t really get the class at all. Every time went on Capsim to do work I never get anything do because I didn’t know what I was doing. Is not like I didn’t like the class the class I just us doing the Capsim online was hard for some people because they didn’t know what to do. Next semester I think the class should be thought like microeconomic because more people we will it better. Another idea I was thinking was we could do a field trip to some business meetings even though I know students in college don’t do feel trip. The feel trip will give us an ideal of what a real
I am writing to inform you of a recent economic opportunity that could leave you rich if you choose to invest. The prospect of wealth relies on superconductors- the system of the future and present. You could earn millions by contributing to the research of superconductors.
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 Little Red Cap is about a young girl, who wears a red velvet cap that her grandmother had handmade for her which is why it is titled the Little Red Cap. One day her asks her to take some cake and wine to her grandmother, and tells her not to stray from the path because there is danger in the trees. While walking along the path, a wolf pops out in front of the little girl, and she tells him that she is going to her grandmother’s house to drop off some wine and cake. Without thinking clearly, she tells the wolf the exact directions to her grandmother 's house and he persuades her to go pick flowers for the grandmother off the path. When she finally arrives to grandmother’s house, she is shocked at how big some of grandmas features are and says “Oh, grandmother, what big ears you have!”, “OH, grandmother, what big eyes you have!”, “OH, grandmother, what big hands you have!" and "Oh, grandmother, what a horribly big mouth you have!”. She then realizes that grandmother isn’t grandmother it’s the wolf and he eats the little girl as well as already have eaten the grandmother. A woodsman hears the wolf 's satisfied snores and thought he better check in on the old lady and finds the wolf.