Unraveling the effect of alkali cations on Fe single atom catalysts with high coordination numbers.

Fe single atom catalysts (SACs) with high coordination numbers have emerged as high-performance catalysts for the conversion of CO to CO. However, the influence of alkali cations at the catalyst-electrolyte interface has not yet been understood clearly. Here, we investigate the role of various alkali metal cations (Na, K, Rb) in catalytic CO reduction reaction (CORR) behavior on high coordination number Fe SACs (FeN and FeN) obtained from a facile hard template method.

High-safety and high-efficiency electrolyte design for 4.6 V-class lithium-ion batteries with a non-solvating flame-retardant.

Nonflammable electrolytes are critical for the safe operation of high-voltage lithium-ion batteries (LIBs). Although organic phosphates are effective flame retardants, their poor electrochemical stability with a graphite (Gr) anode and Ni-rich cathodes would lead to the deterioration of electrode materials and fast capacity decay. Herein, we develop a safe and high-performance electrolyte formulation for high-voltage (4.