Gi-Won Yoo

Effects of Calcinations Temperature on the Electrochemical Properties of Li(Ni0.6Co0.2Mn0.2)O2 Lithium-ion Cathode Materials

Using Na2CO3 and MeSO4 (Me = Ni, Co and Mn) as starting materials, the pre- cursor of (Ni0.6Co0.2Mn0.2)CO3 has been synthesized by carbonate co-precipitation. The precur- sor was mixed with Li2CO3, and calcined at 750, 850, and 950 o C in air. Effect of calcinations temperature on characteristics of Li(Ni0.6Co0.2Mn0.2)O2 cathode materials was investigated. The structure and characteristics of Li(Ni0.6Co0.2Mn0.2)O2 were determined by X-ray diffraction (XRD), Scanning electron microscopy (SEM) and electrochemical measurements. The X-ray diffraction (XRD) results show that the intensity ratio of I(003)/I(104) increased and the R-factor ratio decreased with the increase of calcinations temperature. And Scanning electron microscopy (SEM) result show that the primary particle size increased. Especially, the Li(Ni0.6Co0.2Mn0.2)O2 calcined at 950 o C for 24 H shows excellent electrochemical performances with reversible spe- cific capacity of 165.3 mAhg �1 (cut-off voltage 2.5~4.3 V, 0.1 C(17 mAhg �1 )) and good capacity retention of 95.4% after 50 th charge/discharge cycles(cut-off voltage 2.5~4.3 V, 1 C(170 mAhg �1 )).

The Structural and Electrochemical Properties of Li[Ni 0.6-x Ba x Co 0.1 Mn 0.3 ]O 2 (x = 0, 0.01) by Barium Doping

LiNi_{0.6}Co_{0.2}Mn_{0.2}O_2

The Structural Stability and Electrochemical Properties of Fe Doped Li(Ni0.575Co0.1Mn0.325)O2

의 전구체 물질에 KCl을 첨가함으로써, 리튬카보네이트(

Novel design of core shell structure by NCA modification on NCM cathode material to enhance capacity and cycle life for lithium secondary battery

Li_2CO_3

Barium Doped Li2FeSiO4 Cathode Material for Li-Ion Secondary Batteries.

)와 리튬수산화물(LiOH)의 양을 감소시켰을 때 전기화학특성에 어떤 영향을 주는지에 대한 연구를 진행하였다. KCl을 1 질량 %로 전구체에 첨가하여

Functionality of Sugar Coated for Li[Li0.2Ni0.2Co0.08Mn0.52]O2 as Positive Electrode Materials for Lithium-Ion Secondary Batteries

800^{\circ}C

Synthesis and Electrochemical Properties of 0.5LiFePO4–0.5Li2FeSiO4 Cathode Material for Lithium-Ion Batteries

에서 열처리 한 샘플의 경우, 첨가하지 않은 재...

Improvement of Electrochemical Properties of Ni-Rich Cathode Material by Polypyrrole Coating.

리튬 이차전지 양극소재인 Ni-rich계의

Effect of Structural and Electrochemical Properties of Yttrium-doped LiNi0.90Co0.05Al0.05O2 Electrode by Co-precipitation for Lithium Ion-batteries

Li[Ni_{1-x-y}Co_xMn_y]O_2