Rechargeable quasi-solid state lithium battery with organic crystalline cathode.
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.
Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, Katahira 2-1-1, Aoba-ku, Sendai, Japan.
Yuki
Y
Hanyu
Itaru
I
Honma
D011211:Electric Power Supplies; D004563:Electrochemistry / Q000295:instrumentation*; D004566:Electrodes; D004583:Electrons; D017743:Equipment Reuse; D008094:Lithium / Q000737:chemistry*; D008855:Microscopy, Electron, Scanning; D008956:Models, Chemical; D015394:Molecular Structure; D009930:Organic Chemicals / Q000737:chemistry*; D010084:Oxidation-Reduction; D015203:Reproducibility of Results
D009930:Organic Chemicals; D008094:Lithium