Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Japan.
Sci Rep. 2012;2:453. doi: 10.1038/srep00453. Epub 2012 Jun 12.
Utilization of metal-free low-cost high-capacity organic cathodes for lithium batteries has been a long-standing goal, but critical cyclability problems owing to dissolution of active materials into the electrolyte have been an inevitable obstacle. For practical utilisation of numerous cathode-active compounds proposed over the past decades, a novel battery construction strategy is required. We have designed a solid state cell that accommodates organic cathodic reactions in solid phase. The cell was successful at achieving high capacity exceeding 200 mAh/g with excellent cycleability. Further investigations confirmed that our strategy is effective for numerous other redox-active organic compounds. This implies hundreds of compounds dismissed before due to low cycleability would worth a re-visit under solid state design.
将无金属、低成本、高容量的有机阴极材料应用于锂电池一直是一个长期目标，但由于活性材料溶解在电解液中，导致其循环稳定性问题一直难以解决。为了实际应用过去几十年中提出的众多阴极活性化合物，需要一种新的电池结构策略。我们设计了一种固态电池，可以在固相中容纳有机阴极反应。该电池成功实现了超过 200 mAh/g 的高容量和优异的循环稳定性。进一步的研究证实，我们的策略对许多其他氧化还原活性有机化合物也有效。这意味着，以前由于循环稳定性差而被忽视的数百种化合物，在采用固态设计后值得重新研究。
