How long does your phone need to be charged? Researchers at Stanford University say they have taken a big step toward the holy grail of energy storage -- Pure lithium battery. A team, including former energy minister steven Chu, said they are building a lithium battery that could bring 300 of the revenue to electric vehicles A mile driving range and three times the juice on the phone. However, Cui Yi, a professor at Stanford University, said that it may take three to five years to bring the product to the market. Part of their job is to make better batteries. Not only for portable electronics, but also for storing solar and wind energy when the sun does not shine and the wind does not blow. University, start a business Ups and major companies are using new materials such as vanadium or adjusting lithium Sony launched the ion battery more than 20 years ago. The Stanford research team says they are using nanotechnology to make a pure lithium battery. Thanks to its light weight and excellent efficiency, progress has been sought for decades. \"If we can double the energy density and reduce the cost It will be very exciting, \"Chu said in a university announcement. \"We will have a mobile phone with three times battery life and an electric car with 300 kilometers -- Mileage of $25,000- Performance is 40 miles better than an internal combustion engine. \"Today\'s lithium battery is only lithium in lithium batteries, which is one of the three basic parts of the battery. When the anode is discharged and the cathode receives electrons, the electrolyte provides electrons. The Stanford research team also added lithium to the anode. This is tricky because of the silicon and graphite Two common materials in the anode During charging, lithium expands more and drains the electrolyte. The solution? Cui\'s lab built a cell. Like a micro layer Called \"nano sphere\" This creates a flexible non- A reaction film that protects unstable lithium. It describes the work of a study published this week in the journal Nature Nanotechnology. This layer improves battery efficiency. In order to be commercially viable, the battery usually needs to be put back to 99. 9% of lithium is lost during charging. The efficiency of the previously unprotected lithium anode was about 96%, but Cui said his version was close to 99. 6%, he expected to reach 99. Two years 9% Some experts are skeptical. John Goodno, who helped invent the original lithium. Cui Tiankai said that the ion battery at the end of 1970 is still working to improve the technology, and its protective layer is not an \"ideal\" solution. \"It is not clear whether he has achieved this through a process that is cheap enough,\" Goodenough said . \" He\'s 92 now. year- Old professor of materials science at the University of Texas-Austin. The world of batteries, like any other field. Edge technology has seen its share of failure. Lithium, October 2012 Ion battery maker A123 filed for bankruptcy after spending $0. 132 billion in federal stimulus funds. Two months later, the American WanxiangS. Arm, the Chinese auto parts giant, bought a123 technology. However, Cui Tiankai knows how to commercialize his research, and his lithium anode work has not yet been funded by any federal funds. He\'s the founder of Silicon Valley startup. Up Amprius with a venture capital of $30 million in January- Except for the previous funds- Sell a new type of longLong lasting lithiumion battery. Amprius, whose board members include Chu, won 1997 Nobel Prize in Physics and returned to Stanford after leaving the Obama administration.