Limited Content of Fe in Solid Solution Li(Ni, Mn, Co, Fe)O2: Polyhedron Homogeneity and Specific Capacity

被引：0
作者：
Nipan, G. D. [1 ]
Smirnova, M. N. [1 ]
Kornilov, D. Yu [2 ]
Kop'eva, M. A. [1 ]
Nikiforova, G. E. [1 ]
Gubin, S. P. [1 ]
机构：
[1] RAS, Kurnakov Inst Gen & Inorgan Chem, Moscow 119991, Russia
[2] AkKo Lab Ltd, Moscow 129110, Russia
来源：
JOURNAL OF PHASE EQUILIBRIA AND DIFFUSION | 2020年 / 41卷 / 03期
关键词：
gel combustion; Li-ion battery materials; phase diagram; solid solution Li(Ni; Mn; Co; Fe)O-2; x-ray diffraction; CATHODE MATERIALS; LITHIUM; BATTERIES; ELECTROCHEMISTRY; CAPABILITY; SYSTEM; AL;
D O I：
10.1007/s11669-020-00818-0
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The samples with nominal compositions Li-1.1(Ni0.33Mn0.33Co0.33)(x)Fe1-xO2(0 <= x <= 1) were synthesized by the starch-based gel combustion. The obtained samples had homogeneity composition Li(1+y)Ni(0.27)Mn(0.27)Co(0.27)Fe(0.20)O(2)in the solid solution with alpha-NaFeO(2)structure based on the results of the x-ray phase analysis. The structure of stable homogeneity Li(Ni,Mn,Co,Fe)O(2)can be represented as a pentahedron having the base Li1+yNiO2-Li1+yNi0.5Mn0.5O2-Li(1+y)CoO(2)with Fe content limit ~ 15% of the total cation number. It is observed within the concentrations of tetrahedron consisting the pseudo-four-component system (Li1+yNiO2-Li1+yMnO2-Li1+yCoO2-Li1+yFeO2) upon set isobaric-isothermal conditions (T = 800 degrees C, P-O2 = 21 kPa). The electrochemical testing of homogeneous samples such as Li1+yNi0.23Mn0.23Co0.30Fe0.23O2, Li(1+y)Ni(0.27)Mn(0.27)Co(0.20)Fe(0.27)O(2)and Li(1+y)Ni(0.30)Mn(0.23)Co(0.23)Fe(0.23)O(2)was carried out with almost the equimolar ratio of transition metals.
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页码：276 / 281
页数：6
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