Author/Authors :
Prince، نويسنده , , A.A.M. and Mylswamy، نويسنده , , S. and Wang، نويسنده , , C.Y. and Chang، نويسنده , , S.C. and Liu، نويسنده , , R.S. and Lin، نويسنده , , Ch. R. Lin and S. T. Lin ، نويسنده , , Y.K. and Shen، نويسنده , , C.H and Huang، نويسنده , , S.M. and Lee، نويسنده , , J.F.، نويسنده ,
Abstract :
Structural and electrochemical studies have been carried out on LiNi0.8Co0.17Al0.03O2 cathode material. X-ray diffraction refinement results confirmed that the material is in a pure phase having a layered structure. The electrochemical study on LiNi0.8Co0.17Al0.03O2 shows high specific discharge capacity with good cycle life upon different charge-discharge. In situ X-ray absorption near edge structure analysis confirmed the transformation of Ni state from Ni3+ to Ni4+ during the delithiation process without affecting the valency of Co. The electrochemical results revealed that the doping of Co3+ and Al3+ stabilized the layered structure considerably during delithiation process.
Keywords :
C. Cathode material , B. Lithium ion batteries , E. Electric charge and discharge , X. XANES
