Mechanochemical Process on Layered Compounds MoO3 and Graphite to Construct Heterostructure Composites and its Lithium Storage Performance
This paper investigates the distinct funtional characteristics of different metal ions in the electro-chemical energy storage process of layered sodium-ion batteries.Ni,Mn,Fe,Cu,and Ti were selected,and their compositions were adjusted to fabricate a novel cobalt-free high-entropy layered oxide cathode material,NaNi0.3Cuo.1Fe0.1Mn0.44Ti0.06O2,by using a combination of ball milling and high-temperature solid-state sintering methods.The rational combination and composition of elements enabled the high-entropy sample to exhibit low Na-vacancy ordering and high phase transition reversibility during charge-discharge processes,thereby demonstrating desirable electro-chemical performance.Under a relatively higher current density of 1 C,the specific capacity of the hybrid material remained stable at 123.6 mAh/g,indicating a stable structure and providing more Na-ion storage sites.Even after 200 cycles,the specific capacity remained at 104.6 mAh/g,with a capacity retention rate of 84.6％.
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维普
