Synthesis And Application Of Calix[4]quinone/CMK-3 For Li-/Naion Batteries

As a new type of energy conversion and storage equipment,lithium ion and sodium ion batteries have attracted much attention.The traditional lithium ion and sodium ion battery materials are majority of metal oxides which usually costly,non renewable,and have low energy density and limited resources,so it is difficult to meet the needs of largescale energy storage system.Therefore,meeting new electrode materials has a significant effort.As lithium/sodium ion battery cathode materials,organic carbonyl compounds are very promising energy-storage material due to their advantages,such as high specific capacity,abundant resources,and environmental friendliness.However,the dissolution of organic carbonyl compounds causes its poor cycle performance,which makes the practical applications of organic carbonyl compounds as lithium/sodium anode materials are severely constrained.Conjugated carbonyl compounds Calix[4]quinone(C4Q)were chosen as anode of lithium ion and sodium ion battery.C4 Q and ordered mesoporous carbon CMK-3 were combined to form C4Q/CMK-3 nanocomposites,and the electrochemical properties of C4 Q and C4Q/CMK-3 as cathode materials for lithium ion and sodium ion batteries were studied.The main results as follows:(1)In the lithium ion battery system,C4 Q cathode in the liquid electrolyte delivered an initial capacity of 395.5 mAh·g-1(89% of the theoretical capacity)at 0.1 C,but only preserved approximately 60.3 mAh·g-1 after 10 cycles owing to C4 Q dissolution.C4Q/CMK-3 can effectively solve the dissolution problem of C4 Q.When the mass ratio of C4 Q to CMK-3 was 1:2,the cycle performance is the best.After 50 weeks,discharge capacity is 241.4 mAh·g-1 with capacity retention of 62%.The experimental results show that C4Q/CMK-3 can improve the cycle stability of lithium ion batteries.(2)In sodium ion battery system,C4Q/CMK-3 composite obtained good sodium ion battery performances.In 0.1 C discharge conditions,C4Q/CMK-3 cathode delivered an initial capacity of 438.4 mAh·g-1(98% of the theoretical capacity),proved that the eight electronic mechanism that similar to the mechanism of lithium ion batteries.After 50 cycles,the capacity is 219.2 mAh·g-1 with capacity retention of 50%.The experimental results show that organic carbonyl compound C4 Q as a promising material for the cathode of sodium ion batteries.