Riemannian Surface on Carbon Anodes Enables Li-Ion Storage at -35 °C.

ABSTRACT: Since sluggish Li⁺ desolvation leads to severe capacity degradation of carbon anodes at subzero temperatures, it is urgently desired to modulate electron configurations of surface carbon atoms toward high capacity for Li-ion batteries. Herein, a carbon-based anode material (O-DF) was strategically synthesized to construct the Riemannian surface with a positive curvature, which exhibits a high reversible capacity of 624 mAh g^-1 with an 85.9% capacity retention at 0.1 A g^-1 as the temperature drops to -20 °C. Even if the temperature drops to -35 °C, the reversible capacity is still effectively retained at 160 mAh g^-1 after 200 cycles. Various characterizations and theoretical calculations reveal that the Riemannian surface effectively tunes the low

SUBMITTER: Lu Z 

PROVIDER: S-EPMC9335919 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature