Multifunctional N, S-co-doped carbon quantum dots enable defect healing and conductive network construction in spent LiFePO4 cathodes - Juyong Wang; Bingqiang Tan; Dezhi Chen; Xianfu Liu; Rui Zhou; Chongwen Hu; Chunli Liu; Guisheng Zeng; Xubiao Luo (Chemical Engineering Journal, 2025)