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| Waste‐Separator‐Derived Carbon and Its Synergistic Enhancement of Recycled Graphite for Lithium‐Ion Batteries |
| Received:May 19, 2025 Revised:July 02, 2025 |
| DOI：10.11980/j.issn.0254-508X.2025.09.008 |
| Key Words:waste separator‐derived carbon lithium‐ion battery recycling recycled graphite composite electrode |
| Fund Project:河南省教育厅教学质量工程项目（豫教［2022］38693）；教育部高等教育司协同育人项目（220902557050855）。 |
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| Abstract:This study proposed an efficient strategy for upgrading polyolefin separators obtained from the disassembly of scrap lithium-ion batteries into high-value carbon materials. The results indicated that the separator-derived carbon exhibits a layered structure with the coexistence of ordered and disordered regions. When used as an anode material， it achieved a specific capacity of 695 mAh/g at a current density of 100 mA/g， exceeding twice that of recycled graphite. Although the conversion efficiency and product yield of the carbonization process still need optimization， its exceptional electrochemical lithium storage performance significantly enhanced the capacity of recycled graphite even with a small amount of addition. The composite electrode based on recycled graphite and separator-derived carbon demonstrates superior lithium-ion diffusion characteristics and capacity stability： after 1 200 cycles at a 0.5 C rate， the composite material maintained a stable discharge capacity of 380 mAh/g， while the single recycled graphite only achieved 285 mAh/g. |
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