Se/N co-doped carbon nanorods for potassium ion storage. Issue 17 (19th July 2022) - Ding, Gaohui
Abstract : Herein, we make use of the large-sized Se atom to regulate the local structure of the graphitic lattice to optimize N-doping species to strengthen the adsorption of K +, which can greatly boost the capacitive capacity for PIBs. Abstract : Herein, we make use of the large-sized Se atom to regulate the local structure of the graphitic lattice to optimize N-doping species to strengthen the adsorption of K +, which can greatly boost the capacitive capacity for potassium ion batteries. The resulting Se/N co-doped carbon nanorods (SeNCRs) retain a reversible capacity of 303 mA h g −1 at 0.1 A g −1 after 100 cycles, and exhibit long-term cycling performance with a capacity of 198.6 mA h g −1 at 2 A g −1 after 3000 cycles. Electrochemical characterizations confirm the existence of the capacitive capacity in the SeNCRs for potassium ion batteries, and corresponding physical characterizations show that the SeNCRs have a stable structure that can tolerate the reversible intercalation/deintercalation of K + .