Organic polymer material with a multi-electron process redox reaction: towards ultra-high reversible lithium storage capacity

Sulfur chain grafted poly(pyridinopyridine) (SPPY) presents an over five-electron process redox reaction, a high reversible capacity of up to 1750 mAh g−1-SPPY and excellent cycling stability. Combined with its facile and eco-efficient synthesis, SPPY is a potential green material for ultra-high capacity of reversible lithium storage and opens a new widow to seek ultra-high capacity materials for lithium ion batteries.