| Title | Sustainable Regeneration of Spent Graphite as a Cathode Material for a High-Performance Dual-Ion Battery |
|---|---|
| ID_Doc | 8360 |
| Authors | Zheng, MT; Wang, JC; Qian, SS; Sun, Q; Chen, H; Zhang, L; Wu, ZZ; Zhang, SQ; Liu, TF |
| Title | Sustainable Regeneration of Spent Graphite as a Cathode Material for a High-Performance Dual-Ion Battery |
| Year | 2023 |
| Published | Acs Sustainable Chemistry & Engineering, 11.0, 11 |
| Abstract | A resource-efficient and energy-saving recycling process is vital for establishing a sustainable circular economy of lithium-ion batteries (LIBs). Herein, we propose and use a one-step water-based recycling process to recycle and regenerate the graphite anode materials from spent LIBs. This process can not only successfully regenerate graphite from a solid electrolyte interface, dead lithium, and residual electrolyte and maintain its long-range-ordered layer graphite structure but also enlarge the interlayer distance and introduce abundant oxygen-containing functional groups to the as-regenerated graphite. Our electro-chemical characterization and density functional theory (DFT) calculations reveal that expanded interlayer spacing and the oxygen-containing moieties make the regenerated graphite more suitable for storing PF6- rather than Li+. As such, the as -regenerated graphite facilitates resultant graphite dual-ion batteries (GDIBs) with impressive rate performance and stability, for example, an 85.3% capacity retention even after 500 cycles at 1 A g-1. Such a simple waste-to-resource strategy proposed in this work is expected to provide a low-cost and inspiring recycling pathway for spent LIBs and enable the sustainable manufacturing of GDIBs. |
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