As we all know, lithium batteries provide key energy for a large number of mobile electronic products. However, people mine lithium ores in large quantities, which will have an impact on the ecological environment. Recently, some scientists have proposed that a greener and more environmentally friendly battery may appear in the future, or even completely abandon the battery. Traditional batteries may gradually disappear. If electric vehicles become mainstream transportation, global demand for lithium will increase significantly in the future. Some experts predict that existing lithium suppliers could exhaust their known reserves within decades. Lithium shortages have spurred the search for alternative elements. According to the foreign magazine "Conservation", most researchers are currently working on creating more efficient electrodes or reducing "non-green" metals in batteries. However, some of these bold ideas completely abandon the original definition of batteries. Researchers from Imperial College London and the State University of New York in the US envision a future in which common materials used in cars and buildings - concrete, plastics and carbon fiber - will be used to store the energy we need. According to reports, Joachim Steinke, a polymer chemist at Imperial College, and his team envisioned giving the outer shell of an electric vehicle the function of storing energy. Currently, mobile device cases are both heavy and ineffective. Steinke hopes to use carbon fiber fabrics to build car bodies and double as capacitors. Unlike a battery, the positive and negative charges of a capacitor are separated and connected to form a current. Because capacitors discharge all of their charge at once, they are particularly suitable for devices that require a surge of energy, such as an accelerating car. The team at Imperial College are working with Volvo to replace a small section of car floorboards with their carbon fiber for drivetrain use. According to Steinke's vision, the entire car body will be able to store electric charge, eventually making the battery disappear completely. In the future, if renewable energy is to become popular, energy storage technology must keep up. Deborah Chang, a materials scientist at the State University of New York, is working on a study that, if successful, could turn a building into a big battery. She's working on turning walls into electrical storage capacitors. It is understood that concrete is a porous material made of water and cement. Water can act as an electrolyte, but unfortunately it is not efficient enough. Deborah Zhang inserted the positive and negative electrodes into a concrete slab to generate a few microwatts of electricity per kilogram, enough for a hearing aid. "I just demonstrated basic scientific feasibility," Zhang said. "More research needs to be done to increase the energy density so that it can be recharged. If you need to find the right water and cement ratio, try different Electrode materials." New charging technology helps batteries "slim down". New charging technology may provide a way to solve battery problems. Researchers at Utah State University's Energy Dynamics Laboratory are working on a wireless energy system that can feed power into a moving car. It works on magnetic resonance coupling: large coils buried under the road turn on when a car approaches, creating a magnetic field. This magnetic field will be tuned to a specific frequency, delivering power to a receiving coil located on the underside of the car. Initially, batteries will remain the basic component, and as the number of electric vehicles increases, coils could be buried under parking lots, under garage floors and in wireless "charging stations." Later, they can be buried under the road. "If you lived within 20 miles of these roads, the size of the car battery could be reduced to 20 percent of its current size," said Jeff Muth, director of the Energy Dynamics Laboratory at Utah State University. If wireless charging technology is successful, every highway, alley, and driveway could be equipped with coils to charge passing cars. "In 30 or 40 years, wireless charging technology will be fully integrated into the transportation system," Muth said. "You will see a dedicated lane in every state in the United States, maybe called an 'easy charging lane.'"

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