Ti掺杂对单晶LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2电化学性能的影响
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摘要
采用高温固相法掺入Ti元素合成锂电池正极材料单晶LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2,运用X射线衍射仪和扫描电镜对正极材料晶体结构和微观形貌进行表征,对电性能进行评估,探讨离子掺杂对材料结构以及电化学性能的影响。结果表明:Ti元素可以很好地融入晶格中,未改变晶体的结构;同时,掺杂适量的Ti元素,可有效提升材料的可逆容量和循环性能。
High temperature solid phase method was used to prepare Ti-doped single crystal LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2 cath-ode materials for lithium batteries. The crystal structure and micro morphology of the doped cathode materials werecharacterized by X-ray diffraction and scanning electron microscopy(SEM), to evaluate electrochemical performance,discuss ion doping on the material structure and the influence of the electrochemical properties, the results showed thatthe Ti elements can be very good into the crystal lattice, did not change the crystal structure. At the same time, appropri-ate amount of Ti element can effectively improve the reversible capacity and cyclic performance of the material.
High temperature solid phase method was used to prepare Ti-doped single crystal LiNi_(0.5)Co_(0.2)Mn_(0.3)O_2 cath-ode materials for lithium batteries. The crystal structure and micro morphology of the doped cathode materials werecharacterized by X-ray diffraction and scanning electron microscopy(SEM), to evaluate electrochemical performance,discuss ion doping on the material structure and the influence of the electrochemical properties, the results showed thatthe Ti elements can be very good into the crystal lattice, did not change the crystal structure. At the same time, appropri-ate amount of Ti element can effectively improve the reversible capacity and cyclic performance of the material.
引文
[1]黄可龙,王兆祥,刘素琴.锂离子电池的原理与关键技术[M].北京:化学工业出版社,2002.
[2]K.M Shaju,G.V Subba Rao,B.V.R Chowdari.Performance of layered Li(Ni1/3Co1/3Mn1/3)O2as cathode for Li-ion batteries[J].Electrochimica Acta,2002(2):145-151.
[3]金柱.高电压(4.35v)锂离子正极材料LiNi0.5Co0.2Mn0.3O2的制备及改性的分析研究[D].赣州:江西理工大学,2015.
[4]龚诚.锂离子电池三元正极材料LiNi0.5Co0.2Mn0.3O2(NCM523)制备及改性[D].长沙:长沙矿冶研究院,2015.
[5]马全新,孟军霞,杨磊,等.锂离子电池正极材料LiNi0.5Co0.2Mn0.3O2的制备及电化学性能[J].中国有色金属学报,2013(2):456-462.
[2]K.M Shaju,G.V Subba Rao,B.V.R Chowdari.Performance of layered Li(Ni1/3Co1/3Mn1/3)O2as cathode for Li-ion batteries[J].Electrochimica Acta,2002(2):145-151.
[3]金柱.高电压(4.35v)锂离子正极材料LiNi0.5Co0.2Mn0.3O2的制备及改性的分析研究[D].赣州:江西理工大学,2015.
[4]龚诚.锂离子电池三元正极材料LiNi0.5Co0.2Mn0.3O2(NCM523)制备及改性[D].长沙:长沙矿冶研究院,2015.
[5]马全新,孟军霞,杨磊,等.锂离子电池正极材料LiNi0.5Co0.2Mn0.3O2的制备及电化学性能[J].中国有色金属学报,2013(2):456-462.