Detection of the knee point in lithium-ion battery degradation using a state-of-charge-dependent parameter - Hyunjae Kim; Inwoo Kim; Minsoo Kim; Seongha An; Hyo Chul Ahn; Dongmin Park; Jun Hee Lee; Chun Yong Kang; Jang Wook Choi (Proceedings of the National Academy of Sciences, 2025)