A novel approach for synthesis of expanded graphite and its enhanced lithium storage properties

摘要: Abstract Graphite is still the most widely used anode in today’s lithium ion batteries (LIBs). However, limited theoretical capacity and poor rate capability largely limit its further application LIBs. The modification of graphite structure an efficient way to obtain high-performance anode. Herein, a novel strategy was reported produce expanded holey (EhG) based on annealing intercalation compounds (GICs). Different from conventional routes using water-based electrolytes subsequent excessive waste water for purification process, only minor trace amount organic electrolyte employed form GICs. When it as LIBs, EhG displayed excellent (e.g., 151 mAh g−1 at 2 A g−1) good stability 222 mAh g−1 after 500 cycles 0.5 A g−1). This mainly due plenty “holey” cross-linked “worm-like” structures, which enable with rapid penetration electrolyte, fast electron/ions transfer more Li+ storage. Moreover, full-cell consisting LiNi0.5Mn0.3Co0.2O2 (NMC) cathode exhibited high specific 129.3 mAh g−1 0.5 A g−1 cycling 47.3% retention cycles.