One catalyst could help lithium stocks recover, with one stock looking like a solid long-term buy now.Lithium stocks have been hammered this year alongside lithium prices, but a major industry development this week lifted investors' hopes of a turnaround and sent shares of lithium producers soaring.Here are some top-performing lithium stocks and the percentage by which they rallied at their highest points in trading this week through 12:30 p.m. ET Friday, according to data provided by S&P Global Market Inte ...