Connect with us

Engineering

New Discovery Advances Rechargeable Lithium-Ion Battery Technology

blank

Published

on

Lithium ion battery, Li-ion

Researchers have made an important discovery to advance rechargeable lithium-ion battery technology. The breakthrough is the in the consistency of a solid electrolyte. The discovery has the potential to increase battery safety and exponentially improve battery life and overall storage capacity.

In general, batteries have three chemical components called reactants. There are two electrodes, the anode and the cathode, and the electrolyte. Electrodes are typically composed of solid chemicals that we commonly call metals. The electrolyte is a liquid chemical that sits between the electrodes. Electrolyte is the medium through which energy flows between the electrodes.

Electrical Energy and Chemical Reactions

Li-ion battery

 

A battery does not store electricity, which currently is impossible. Rather, a battery stores electrical energy in the form of chemical energy. When in use, chemical reactions transform the chemical energy into electricity. The electricity flows into a device and the energy powers functionality. An operating battery depletes the reactants as the chemical reactions occur. Functionality persists only as long reactants are available. Eventually, use of the battery depletes the reactants so the chemical reactions are no longer possible and the battery ‘dies.’ But, if it is a rechargeable battery, it is possible to apply electrical energy back into the chemical system. This restores the ability to once again store and discharge electrical energy.

Causes of Malfunction

There are two other causes of battery malfunction. First, liquid electrolyte is flammable and poses a safety risk. The most recent well-known example of burning electrolyte is the Samsung Note 7. Second, during the chemical reactions that create electrical energy, bits of metal accumulate on the electrodes. The accumulated metal bits, dendrites, project outward from the electrodes. If a dendrite ends up touching the opposite electrode, a short circuit occurs and the battery is useless.

However, if the electrolyte is solid instead of liquid, then there is no longer a risk of fire. Also, if it is a particular consistency of solidity, then dendrites cannot form. The pursuit of a solid electrolyte has occurred for almost fifty years. The new research is the result of a fundamental reevaluation about the consistency of the solid electrolyte (wow, look at that, the scientific method in action!).

The previous line of research kept looking at stiffer consistencies to protect against dendrite formation. However, the new research shows that the consistency needs to have more elasticity. This is because stiffer materials can suffer from micro-nicks and –scratches that provide a foothold for dendrite formation. However, a more elastic surface provides degrees of flexibility. Therefore, the surface is pliant at pressure points and does suffer from nicks and scratches. A solid electrolyte would also allow the use of pure lithium electrodes thus further increasing the capacity of the battery. In the end, we have smaller, safer, and longer-lasting rechargeable batteries.

Batteries in the Zombie Apocalypse?

A battery is a spectacular device. They are so common and disposable that the majority of us never give them a second thought. Take a moment and try to identify everything around you at this moment that requires a battery to operate. Computer? Watch? Cell phone? That UPS on your computer system? E-cigarette? Fitbit? Gaming console? Cordless power tools? Car? Lunar explorer? The Mars rover Curiosity or the Juno spacecraft? During the zombie apocalypse, I’m definitely looking for guns, but it’s easy to create weapons out of almost anything. However, I’ll be hoarding batteries like the 90-year old cat-lady hoarding hard candies

Archaeology, technology, science, movies and TV shows, video games, government and politics, reading sci-fi and fantasy, '60s/70s classic rock. These are the areas in which I spend my days (somewhere in there are food and travel...).

Engineering

Next-Generation “Invisibility Shields” are now available and more secure than before

blank

Published

on

blank

Previously confined to ancient myth and science fiction, invisibility cloaks have now become a tangible reality thanks to the efforts of a British start-up over the past four years.

Invisibility Shield Co. launched their inaugural product in 2022, garnering significant online attention and excitement. The corporation is currently seeking to introduce its most recent iteration of second-generation shields, which exhibit enhanced dimensions and stealth characteristics.

The shields do not necessitate any external energy source or magical abilities; rather, they employ optical illusions to create the perception of invisibility.

The panel exhibits a visual illusion of transparency, although it effectively presents a distorted perspective of its underlying contents. The device employs a meticulously designed lens array to effectively redirect the light that is reflected from the topic positioned behind it, moving it away from the observer positioned in front.

In order to divert light that is reflected from the background and the individual positioned behind, the shields employ lenses. According to Tristan Thompson, the designer of the shield, the vertical orientation of the lenses causes the light reflected from the person behind the shield to become more diffuse when spread out, compared to the light reflected from the wider background.

blank

The team’s second-generation invisibility shields are currently available for pre-order on the crowdfunding website Kickstarter, which aims to increase funding for the undertaking. Their initial versions were additionally supported through crowdfunding on Kickstarter, leading to the successful distribution of numerous invisibility shields worldwide.

The second-generation shields operate based on a similar fundamental principle, however, with several modifications included. Firstly, the lenses have been modified in terms of their shape and density in order to enhance resolution and optimize their performance for curved shields. It is worth noting that the previous iteration of the lenses was flat in design. According to Thompson, there has been a transition from a layered construction to the extrusion of each shield face from a single piece. This change has resulted in enhanced clarity compared to previous iterations, where layers of material were bonded together using an adhesive.

Currently, there are three distinct variations of invisibility shields being manufactured: the “Mini” variant, measuring 20 centimeters (8 inches) in height; the “Full Size” variant, measuring 91 centimeters (3 feet) in height; and the “Megashield” variant, measuring over 182 centimeters (6 feet) in height.

Notwithstanding their dimensions, the recently developed shields have been engineered to be compacted to a mere 1/30th of their original size, facilitating convenient portability for individuals.

Early riser The prices of the products are £54 (equivalent to around $68), £299 ($377), and £699 ($883), respectively, based on their different sizes. The delivery of these things is scheduled for the conclusion of 2024.

“The potential is boundless, but above all, these shields are highly enjoyable, providing an opportunity for play and excitement in their creation.” Our objective was to assess the extent to which we could advance this technology. A practical and functional invisibility shield that may be conveniently rolled up and slung over the shoulder.

Continue Reading

Engineering

What is the Green Concorde? Observe the inaugural flight of XB-1 in the state of California

blank

Published

on

blank

The XB-1 experimental aircraft, having successfully completed its inaugural flight, aims to initiate a new era of civil supersonic air travel, more than two decades after Concorde was compelled to retire.

The inaugural flight of the XB-1, a spacecraft developed and manufactured by Boom Supersonic, took place at Mojave Air & Space Port in California on Friday, March 22nd.

The aircraft attained velocities of up to 439 kilometers (273 miles) per hour while operating at an altitude of 2,100 meters (7,120 feet). Although the speed of sound, which is just above 1,234 kilometers (767 miles) per hour, is still far lower, the test flight successfully achieved all of its objectives, which included ensuring safety and evaluating the aircraft’s handling.

Blake Scholl, the creator and CEO of Boom Supersonic, stated that the XB-1 was launched today in the same airspace where the Bell X-1 achieved its first successful flight in 1947.

“I have eagerly anticipated this flight since establishing Boom in 2014, and it signifies the utmost significance.”

The utilization of the XB-1 program is being employed to provide insights for the creation and advancement of Overture, Boom’s environmentally friendly supersonic aircraft. There are already optimistic expectations surrounding this aircraft. The United States government has expressed its intention to acquire a maximum of 50 boom-overture supersonic aircraft for commercial use by the year 2029.

The Overture aircraft is currently in its nascent stage of development, with the ultimate goal of becoming the Concorde of the 21st century. It is a commercial supersonic passenger airliner that surpasses its engineering ancestors in terms of energy efficiency and environmental sustainability.

In January 1976, Concorde launched its inaugural commercial passenger flight, encompassing two concurrent routes: one from London to Bahrain in the Persian Gulf, and another from Paris to Rio de Janeiro through West Africa. The breakthrough aircraft, boasting cruise speeds of up to 2,154 kilometers (1,338 miles) per hour, significantly reduced trip durations by 50% and appeared to hold great potential for the future of commercial carriers.

blank

Nevertheless, after almost thirty years, the aspiration failed. The cost of a supersonic flight was rising, leading to a decline in demand for seats on the planes. The disastrous Air France Flight 4590 crash in 2000, resulting in the deaths of 113 individuals, further solidified the situation. On October 24, 2003, Concorde operated its final commercial flight between New York and London.

Despite more than twenty years passing, civil supersonic air travel has not experienced a resurgence. However, Boom Supersonic is confident in their ability to alter this situation.

“I have been eagerly anticipating for more than two decades an ecologically conscious alternative to Concorde, and the inaugural flight of the XB-1 represents a significant milestone in the realization of my aspirations.” Upon my last flight aboard Concorde in 2003, I was fully aware that this day would inevitably arrive. According to Captain Mike Bannister, the former Chief Concorde Pilot for British Airways, the inaugural flight of the XB-1 supersonic prototype represents a noteworthy milestone in the pursuit of sustainable supersonic flying. This feat took place aboard Overture, which he considers his top preference as the successor to Concorde.

Continue Reading

Astronomy

Bezos’s proposal for the inaugural private space station has just achieved four significant milestones

blank

Published

on

blank

In the foreseeable future, it is possible for astronauts and ordinary individuals to embark on space flight and reside in the Orbital Reef, which serves as a private space station for extended periods of time and is utilized for commercial activities, scientific research, and tourism. The initiative, led by Sierra Space and Jeff Bezos’ Blue Origin, has set a target to achieve operational status in low-Earth orbit by the year 2027. Notably, it has just successfully completed significant NASA tests.

The NASA-funded commercial space station must provide evidence of the proper functioning of its vital life-support system. The most recent four significant achievements pertained to the domains of air and water purification, storage, and recycling.

In space, no resources are wasted, including garbage. Therefore, it is necessary to remove carbon dioxide from the air and restore oxygen. It is necessary to recover and purify water, including urine, while retaining it within the system. Obtaining fresh air or water in space is both costly and challenging.

According to Angela Hart, the manager of NASA’s Commercial Low Earth Orbit Development Program, the achievement of these milestones is of utmost importance in guaranteeing the ability of a commercial destination to sustain human life. This is crucial in order to maintain NASA astronauts’ access to low Earth orbit, enabling them to carry out significant scientific research within the distinctive microgravity environment. Furthermore, the completion of each milestone enables NASA to acquire valuable knowledge regarding our partner’s advancements in station design and development.

One of the examinations centered on the assessment of trace contaminant control, specifically examining the efficacy of filters in eliminating detrimental pollutants from the atmosphere. The water system underwent three distinct testing methods: a water containment oxidation test to evaluate the efficacy of water purification; urine water recovery tests aimed at assessing waste reclamation; and a water tank test to evaluate the storage capacity of the system.

In order to ensure environmental management and the well-being of astronauts, the International Space Station has implemented many systems.

There have been several successful tests conducted on the Orbital Reef in recent times. The inflatable station module LIFE (Large Integrated Flexible Environment) was subjected to extreme testing by Sierra Space in January, ultimately resulting in an explosion. By a margin of 27 percent, LIFE outperformed NASA’s standards.

NASA is providing support to many commercial space stations, like Orbital Reef, through both sponsored and unfunded agreements. As the International Space Station nears its retirement in the coming decade, the human presence in space will undergo significant transformations in the coming years.

Continue Reading

Trending