Solvothermal upcycling of spent LiFePO4 cathode materials into high-voltage LiMn0.5Fe0.5PO4 via a dual-olivine intermediate - Ye Hong; Fan Wang; Chunjiao Hu; Penghui Tan; Tianhua Shang; Heng Kuang; Lingchao Kong; Jin Li; Qianqian Hu; Jian Ouyang; Zilong Tang; Shuaibo Zeng (Journal of Environmental Chemical Engineering, 2026)