New Technique Improves Capacity,Performance of Lithium Ion Batteries

摘要

CKD Corporation entered into a partnership with Musashi Seimitsu Industry Co., Ltd. in April to advance joint development of roll-to-roll lithium pre-doping equipment that realizes lithium ion batteries (LIBs) with higher capacity, longer life and improved safety. It is known that lithium pre-doping technology enables efficient cell designs with good anode-cathode capacity balance and that it is effective for performance improvement and differentiation of LIBs. The lithium pre-doping equipment under joint development provides a solution called advanced LIB that corresponds to present liquid-based LIBs, and significantly improves the performance of LIBs that are key devices in the carbon neutral era. CKD aims to introduce pre-doping technology to the manufacturing process of lithium ion batteries, which has been considered difficult. The new technique will combine CKD's electrode carrying technology it has nurtured in the field of winding devices for LIBs and the original pre-doping technology of Musashi Energy Solutions Co., Ltd.'s original pre-doping technology to electrochemically dope predetermined amount of lithium into an electrode. The introduction of the pre-doping technology enables the reduction of the amounts of rare metals used as cathode materials of lithium ion batteries, and suppressed the deterioration of anode, thereby increasing the cycle life of LIBs. In addition, depending on design, pre-doping of lithium to lithium ion batteries improves energy density by 20 to 40 percent and extend the cycle life of lithium ion batteries about three- to four-fold.