Preparation and cycle performance at high temperature for Li[Ni0.5Co0.2Mn0.3]O2 coated with LiFePO4

Influence of preparation method on structure, morphology, and electrochemical performance of spherical Li[Ni0.5Mn0.3Co0.2]O2

“…Even at 10 C, the capacity of sample CHC-820 is still as high as 135.2 mAh g −1 , and the capacity retention rate is about 63.1 % of that of 0.2 C. Fig. 15 Typical discharge curves of sample a CHC-820 and b CCC-860 at 0.2 C, 0.5 C, 1 C, 2 C, 5 C, and 10 C rates between 2.5 and 4.6 V at 25°C [7][8][9]11], the sample CHC-820 prepared by continuous hydroxide co-precipitation not only shows a better structural integrity (as shown in Table 3) but also evident improvement on electrochemical performance (as shown in Table 4). …”

“…It has been known that the cation mixing will deteriorate the electrochemical performance of the layered oxide materials. The integrated intensity ratio of I 003 /I 104 is sensitive to the cation mixing and usually taken as an approximate measure of the amount of ion mixing in the α-NaFeO 2 type structure materials [7][8][9][10][11]. It was reported that the undesirable cation mixing would appear when the ratio of I 003 /I 104 is smaller than 1.2 [18].…”

“…Cobalt doping can not only promote the formation of Li [Ni 0.5 Mn 0.5−x Co x ]O 2 but also enhance the electronic conductivity and the thermal stability of Li [Ni 0.5 Mn 0.5−x Co x ]O 2 [7][8][9][10]. Li [Ni 0.5 Mn 0.3 Co 0.2 ]O 2 , which can be considered as one of the most promising cathode materials for the application of lithium ion battery among Li [Ni 0.5 Mn 0.5−x Co x ]O 2 series, was first proposed by Liu et al [11].…”

Simple solid-state method for synthesis of Li[Li0.20Mn0.534Ni0.133Co0.133]O2 cathode material with improved electrochemical performance in lithium-ion batteries

“…1 can be identified as a hexagonal lattice of α-NaFeO 2 structure with the R-3m space group. As reported [19], the ordering of the material structure could be indicated from the I(003)/I(104) intensity ratio, the lattice parameter ratio of c/a or the degree of the (006)/(102) and (108)/(110) peak splitting on XRD patterns. The determined lattice parameters, c/a ratio and I (003)/I(104) peak intensity ratio for all the Li[Li 0.20 Mn 0.534 Ni 0.133 Co 0.133 ]O 2 materials are summarized in Table 1.…”

“…[17]. LLOs are excellent high-temperature cathode materials for lithiumion batteries [18,19], and significantly expand the application scope. LLOs with cheap components are very promising for practical utilization of lithium-ion batteries.…”