Figures at a glance

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FIGURE 1

Figure 1: Solubility of various Li salts and transition metal salts in 100g of water according to temperature

FIGURE 2

Figure 2: Solubility of lithium sulfate, nickel sulfate, manganese sulfate, cobalt sulfate, iron sulfate and aluminium sulfate in 100g of 58^o C water

FIGURE 3

Figure 3: Fabrication process of Li_1-xNi_1-x-yMn_xCo_yO₂ (0.1 = x + y = 0.5) with homogeneous arrangement of Ni³⁺, Mn⁴⁺ , and Co³⁺

FIGURE 4

Figure 4: XRD patterns of (a) commercialized LiNi_0.8Mn_0.1Co_0.1O₂ , (b)(e) Li_0.9Ni_0.8Mn_0.1Co_0.1O₂ manufactured according to the change in the mixing ratio and concentration of NaClO and H₂O₂ aqueous solution

FIGURE 5

Figure 4: Ni X-ray absorption near edge structure (XANES) spectroscopic results of NiO, commercialized LiNi_1-x-yMn_xCo_yO₂ manufactured by the general coprecipitation-heat treatment method (CP-NMC), and LiNi_1-x-yMn_xCo_yO₂ prepared by this study (SH-NMC)

FIGURE 6

Figure 6: Mn XANES spectroscopic results of commercialized LiNi_1-x-yMn_xCo_yO₂ (CP-NMC) manufactured by the general coprecipitation-heat treatment method and LiNi_1-x-yMn_xCo_yO₂ (SH-NMC) prepared by this study

FIGURE 7

Figure 7: Co XANES spectroscopic results of commercialized LiNi_1-x-yMn_xCo_yO₂ (CP-NMC) manufactured by the general coprecipitation-heat treatment method and LiNi_1-x-yMn_xCo_yO₂ (SH-NMC) prepared by this study

FIGURE 8

Figure 8: Results of Fourier transform into r-space of k³ -weighted Ni K-edge extended X-ray absorption fine structure (EXAFS) spectroscopy information of NiO, commercialized LiNi_1-x-yMn_xCo_yO₂ (CP-NMC) manufactured by the general coprecipitation-heat treatment method, and LiNi_1-x-yMn_xCo_yO₂ (SH-NMC) prepared by this study

FIGURE 9

Figure 9: Li magic angle spin nuclear magnetic resonance (Li MAS NMR) spectra of LiCoO₂ and LiNi_1-x-yMn_xCo_yO₂

FIGURE 10

Figure 10: charge and discharge curves of a coin cell lithium secondary battery manufactured using SH-NMC811 as a cathode active material at 0.2C rate and 25^o C

FIGURE 11

Figure 11: charge and discharge curves of a coin cell lithium secondary battery manufactured using SH-NMC622 as a cathode active material at 0.2C rate and 25^o C

FIGURE 12

Figure 12: charge and discharge curves of a coin cell lithium secondary battery manufactured using SH-NMC523 as a cathode active material at 0.2C rate and 25^o C

FIGURE 13

Figure 13: charge and discharge curves of a coin cell lithium secondary battery manufactured using SH-NMC523 as a cathode active material at 0.2C rate and 60^o C