2026-03-12 中国科学院（CAS）
＜関連情報＞
- https://english.cas.cn/newsroom/cas-in-media/202603/t20260313_1152671.shtml
- https://www.nature.com/articles/s41467-025-67912-0
リチウム回収と使用済み正極材のアップサイクルを実現する3in1戦略 A three-in-one strategy for lithium recovery and upcycling of spent cathode materials
Yue Wang,Xiaohong Zheng,Weiguang Lv,Li Li,Hongbin Cao & Zhi Sun
Nature Communications Published:10 January 2026
DOI:https://doi.org/10.1038/s41467-025-67912-0
Abstract
The recycling of spent lithium-ion batteries is essential for sustainable development of clean energy industry. Traditional recycling methods face challenges such as high energy/chemical consumption and limited adaptability. This study introduces a ‘Three-in-One’ strategy that leverages mechanochemical (MC) treatment to enhance lithium recovery, transition metal upgrading, and CO2 sequestration. MC treatment induces micro-segregation of lithium and transition metals, resulting in a structurally disordered material with a Li-rich surface, facilitating selective lithium extraction. Subsequently, CO2 is used as the sole reagent and lithium leaching efficiency exceeding 95% is achieved by forming lithium bicarbonate. Conducted under ambient conditions without additional grinding aids or leaching reagents, this method minimizes environmental impact. Transition metals are simultaneously transformed into high-performance oxygen evolution reaction (OER) catalysts, demonstrating an overpotential of 322 mV at a current density of 10 mA cm-2. These catalysts maintain stability over 200 h of operation. This approach not only provides an efficient pathway for lithium recovery but also upcycles spent cathode materials into valuable catalysts, supporting sustainable energy conversion technologies. The strategy is particularly effective for high-Ni cathode systems, offering significant practical advantages.
