In recent years,cobalt has emerged as a critical limiting factor in the production chain of the lithium-ion battery industry.The increasing demand for electric vehicles has made the dependence on cobalt in lithium-ion...In recent years,cobalt has emerged as a critical limiting factor in the production chain of the lithium-ion battery industry.The increasing demand for electric vehicles has made the dependence on cobalt in lithium-ion batteries a significant challenge for environmental sustainability.To address the problem,a new class of cobalt-free materials has been introduced,called lithium iron aluminium nickel oxides(NFA)cathode materials,with the general formula Li(Ni_(0.8)Fe_(0.1)Al_(0.1))_(1-x)Mg_(1.5x)O_(2)(x=0,0.005,0.01,0.015).In this work,a series of cobalt-free materials were synthesized via sol-gel processes,and variations in magnesium content were explored to investigate their compositional landscape.Electrochemical performance evaluations revealed that Mg^(2+)doping significantly improved the electrochemical properties of the material.Among them,samples prepared with 1.5 mol%Mg^(2+)doping(i.e.the value of 0.01 for x)exhibited the best cycling capacity.After 100 cycles at 0.1C,the capacity retention rate was found to be 80.71%,with a specific capacity of 151.39 mAh g^(-1),demonstrating remarkable rate capability and cycling stability.Although still in the nascent stages of the investigation,these cathodes hold potential as candidates for the next generation of cobalt-free lithium-ion batteries.展开更多
基金supported by the Industry-University-Research Cooperation Project of Zhuhai,China(grant No.2220004002572).
文摘In recent years,cobalt has emerged as a critical limiting factor in the production chain of the lithium-ion battery industry.The increasing demand for electric vehicles has made the dependence on cobalt in lithium-ion batteries a significant challenge for environmental sustainability.To address the problem,a new class of cobalt-free materials has been introduced,called lithium iron aluminium nickel oxides(NFA)cathode materials,with the general formula Li(Ni_(0.8)Fe_(0.1)Al_(0.1))_(1-x)Mg_(1.5x)O_(2)(x=0,0.005,0.01,0.015).In this work,a series of cobalt-free materials were synthesized via sol-gel processes,and variations in magnesium content were explored to investigate their compositional landscape.Electrochemical performance evaluations revealed that Mg^(2+)doping significantly improved the electrochemical properties of the material.Among them,samples prepared with 1.5 mol%Mg^(2+)doping(i.e.the value of 0.01 for x)exhibited the best cycling capacity.After 100 cycles at 0.1C,the capacity retention rate was found to be 80.71%,with a specific capacity of 151.39 mAh g^(-1),demonstrating remarkable rate capability and cycling stability.Although still in the nascent stages of the investigation,these cathodes hold potential as candidates for the next generation of cobalt-free lithium-ion batteries.
