OAK RIDGE, Tennessee, Feb. 17 -- The U.S. Department of Energy's Oak Ridge National Laboratory issued the following news release: For those who dream of driving their electric vehicle long distances to see the world's largest ball of twine, Chelsea Chen is dedicated to making it possible. Chen, a polymer physicist at the Department of Energy's Oak Ridge National Laboratory, is studying ion transport in solid electrolytes that could help electric vehicle battery charges last longer. "The chall  more