New materials for electrochemical storage - from post Li-ion to post Li systems - (PPT)

摘要

The single step transformation of sulphur to Li_2S_2/Li_2S and vice-versa during the discharge/charge process was realized in a cocnut-based carbon and explained by analyzing the subsurface using XPS. Mg-S batteries need non-nucleophilic electrolytes. -> prepared from Mg amide compounds. A new Cl-free electrolyte shows very good performance. Major issues: overpotentials, capacity degradation upon cycling (polysulfide). Organic electrode based on porphyrins can deliver mediocre capacities at very high rates. for several 1000 cycles.