Innovation has pretty much finished with car tires (轮胎) right, I mean, what’s left to change? How about the whole “air” part?

Michelin Company’s attempt to tackle tire rubbish around the world witnessed them roll out puncture-proof “airless” tires, which they say should help reduce the 18% of all world tires that are abandoned early due to punctures (轮胎漏气). Deserted tires arc a huge worldwide waste problem — the US produces 260 million abandoned tires per year, many of which end up in landfills or on the sides of the freeway where they release harmful gases and microplastic pollutants as they break down.

Michelin Company's Unique Puncture Proof Tire System or “UPTIS” is designed using 46% recycled material, and made from a plastic matrix (母体) mixed with glass fibers that provide a flexible outer layer with a strong inner one. “The truly distinctive structure of the Michelin UPTIS prototype (原型), or its “strangeness” as we have often heard it called, really attracted the eye of many visitors and left a lasting impression on them,” stated Cyrille Roget, Michelin Group Technical and Scientific Communications Director. “It was an unusual experience for us, and our greatest satisfaction came at the end of the demonstration when our passengers, who were undoubtedly a little alert (警觉) at first, said they felt no difference compared with conventional tires.”

Michelin Company believes airless tires will improve everyone's lives. Maintenance (保养) costs for company’s vehicle fleets will be less expensive, and inexperienced car owners won’t accidentally ruin their rubbers when driving them because they are over-or under-inflated (充气). Although they are still in development stage and using at a large scale within years is unlikely to be available, Michelin Company is not in the least doubtful about their tires’ future.

As far as we know batteries are playing an important role in our life. We couldn’t live without batteries. Why so? Batteries provide power for anything from small sensors to large systems. While scientists are finding ways to make them smaller but even more powerful, problems can arise when these batteries are much larger and heavier than the devices themselves. University of Missouri (MU) researchers are developing a nuclear energy source that is smaller, lighter and more efficient.

“To provide enough power, we need certain methods with high energy density (密度)”, said Jae Kwon, assistant professor of electrical and computer engineering at MU. “The radioisotope (放射性同位素) battery can provide power density that is much higher than chemical batteries.”

Kwon and his research team have been working on building a small nuclear battery, presently the size and thickness of a penny, intended to power various micro / nanoelectromechanreal systems (M/NEMS). Although nuclear batteries can cause concerns, Kwon said, they are safe.

“People bear the word ‘nuclear’ and think of something very dangerous,” he said, “However, nuclear power sources have already been safely powering a variety of devices, such as pace-makers, space satellites and underwater systems.”

His new idea is not only in the battery’s size, but also in its semiconductor (半导体). Kwon’s battery uses a liquid semiconductor rather than a solid semiconductor.

“The key part of using a radioactive battery is that when you harvest the energy, part of the radiation energy can damage the lattice structure (晶体结构) of the solid semiconductor, Kwon said, “By using a liquid semiconductor, we believe we can minimize that problem.”

Together with J. David Robertson, chemistry professor and associate director of the MU Research Reactor, Kwon is working to build and test the battery. In the future, they hope to increase the battery’s power, shrink its size and try with various other materials. Kwon said that battery could be thinner than the thickness of human hair.

Scientists in Australia have discovered that they can use the world’s smelliest fruits to make devices that could power electric cars. A durian is a fruit that looks like a pineapple. It is a delicacy in some Asian countries, but its smell is so unpleasant that some of those countries have banned it from public places. Its smell has been compared to rotting eggs and even smelly old gym socks.

Vincent Gomes and his colleagues at the University of Sydney, in Australia, used a durian and a jackfruit — another fruit known for its terrible smell — to make energy storing devices called supercapacitors.

Supercapacitors are an alternative to batteries. They can’t store as much energy as a normal battery does, but they are much quicker to recharge. Durians and jackfruits contain some of the chemicals used in supercapacitors, which gave Gomes the idea. To make the fruit-based devices, the team heated and then freeze-dried the uneatable cores of the durian and jackfruit to make a special kind of material called an aerogel.

Aerogels are one of the world’s lightest solid materials. Often called “frozen smoke”, they are made by removing the liquid from a gel and replacing it with air. They have many scientific uses, but one of their special properties is the ability to conduct electric currents, which makes them an important part of supercapacitors. The aerogels made from durian and jackfruit both worked well when placed inside a supereapacitor, although the durian aerogel was found to be the better of the two.

The discovery is important because the materials currently used to make supercapacitors are expensive. Using natural foods like durians and jackfruits, Gomes says, could reduce environmental pollution, as well as costs.