An effective method to reduce residual lithium compounds on Ni-rich Li[Ni0.6Co0.2Mn0.2]O2 active material using a phosphoric acid derived Li3PO4 nanolayer

Jo, Chang Heum; Cho, Dae‐Hyun; Noh, Hyung Joo; Yashiro, Hithshi; Sun, Yang Kook; Myung, Seung‐Taek

doi:10.1007/s12274-014-0631-8

Cited by 323 publications

(238 citation statements)

References 36 publications

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“…[35][36][37][38][39] The incorporated coating precursor could react with the residual lithium compounds during annealing process, thereby diminishing these compounds. This innovative approach makes the synthetic process for the nickel-rich cathodes highly efficient because of the absence of the washing and additional calcination process, decreasing the capital cost and process time (Figure 3).…”

Section: −•mentioning

confidence: 99%

“…Representative approaches include the doping, [86][87][88][89][90][91][92][93][94][95][96][97][98] morphological control of the primary particle, [99][100][101][102][103][104] the cathode surface modification, [105][106][107][108][109][110] and the primary particle coating, [35,37,[111][112][113][114][115][116][117][118][119][120][121][122][123][124][125][126] which will be discussed below.…”

Section: Strategies To Realize Commercializationmentioning

confidence: 99%

“…In order to resolve the limitation of the secondary particle coating method, there has been a rapid increase in the volume of research about the incorporation of the coating layer on each primary particle. To date, there were a wide range of primary particle coating methods such as solvent-based treatment, [35,37,111,116,117,[120][121][122]124] gas phase deposition, [123,137] and atomic layer deposition (ALD), [112][113][114][115]119,125] which tuned the whole cathode particles from the surface to inside. To effectively stabilize overall cathode particle, solution-based coating has been considered as an attractive method in terms of the coating homogeneity.…”

Section: Surface Modification In Primary Particle Levelmentioning

confidence: 99%

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Prospect and Reality of Ni‐Rich Cathode for Commercialization

Kim

Lee

Cha

et al. 2017

Advanced Energy Materials

665

582

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practical candidate for the wide application of the LIBs with respect to the reversible capacity, rate capability, and capital cost. [4][5][6][7] In terms of nickel contents, the nickel-rich cathodes with nickel content above 80% have advantages in gravimetric capacity, allowing high gravimetric energy density, compared with the nickel content less than 80%. Currently, the nickel-rich cathodes with the amount of nickel less than 60% are fully commercialized. However, the nickel-rich cathodes with nickel content of ≥80% still have many difficulties in the commercialization with respect to powder properties and electrode fabrication process.The unstable powder properties originate from residual lithium compounds such as LiOH and Li 2 CO 3 that formed by the spontaneous reduction of sensitive trivalent nickel ions during the synthesis process and storage in air. [8][9][10][11] The Li 2 CO 3 significantly promotes the gas evolution and increase the moisture of the cathode powder, which strongly related to the safety issue. [12][13][14] Furthermore, the LiOH on the cathode increases the powder pH value, causing the gelation of the slurry during the electrode fabrication process. The nickel-rich cathode with nickel content of ≤60% have acceptable amount of residual lithium compounds for the practical use. By contrast, the cathode with amount of nickel of ≥80% should be treated by additional process to reduce the residual lithium compounds ( Table 1). Furthermore, other powder properties, such as powder pH and moisture, should be carefully controlled when nickel contents were exceeded of ≥80%. Thus, for the practical application of these cathode materials, most battery companies have adapted the washing process, in which the cathode power was stirred in purified water for 20-40 min. [15,16] The washing process could greatly reduce the residual lithium compounds and powder pH value. [15] However, the washing process not only increases process time and capital cost but also make the nickel-rich cathode more chemically sensitive than nonwashed cathodes. [16] More seriously, the water washing deteriorates the thermal stability of the nickel-rich cathodes, indicating that the washing process should be substituted by other methods for the battery safety.Another important factor for the commercialization of the nickel-rich cathodes is the electrode density directly related to the energy density. In general, the nickel-rich cathodesThe layered nickel-rich cathode materials are considered as promising cathode materials for lithium-ion batteries (LIBs) due to their high reversible capacity and low cost. However, several significant challenges, such as the unstable powder properties and limited electrode density, hindered the practical application of the nickel-rich cathode materials with the nickel content over 80%. Herein, important stability issues and in-depth understanding of the nickel-rich cathode materials on the basis of the industrial electrode fabrication condition for the commercialization of the nickel-rich cathode m...

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Section: −•mentioning

confidence: 99%

Section: Strategies To Realize Commercializationmentioning

confidence: 99%

Section: Surface Modification In Primary Particle Levelmentioning

confidence: 99%

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Prospect and Reality of Ni‐Rich Cathode for Commercialization

Kim

Lee

Cha

et al. 2017

Advanced Energy Materials

665

582

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“…On the bases of these fundamental data, many researchers have suggested solutions to resolve the cyclic degradation problem. Along with diverse approaches such as morphology control11, elemental doping12131415 and surface coating1617181920, Sun et al . have suggested various effective ways to reduce cyclic degradation and improve electrochemical performance through the design of core-shell21, gradient core-shell322, and full concentration gradient structures22324 for Ni-rich NCM cathodes.…”

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confidence: 99%

Intrinsic Origins of Crack Generation in Ni-rich LiNi0.8Co0.1Mn0.1O2 Layered Oxide Cathode Material

Lim

Hwang

Kim

et al. 2017

Sci Rep

258

162

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Ni-rich LiNi0.8Co0.1Mn0.1O2 layered oxide cathodes have been highlighted for large-scale energy applications due to their high energy density. Although its specific capacity is enhanced at higher voltages as Ni ratio increases, its structural degradation due to phase transformations and lattice distortions during cycling becomes severe. For these reasons, we focused on the origins of crack generation from phase transformations and structural distortions in Ni-rich LiNi0.8Co0.1Mn0.1O2 using multiscale approaches, from first-principles to meso-scale phase-field model. Atomic-scale structure analysis demonstrated that opposite changes in the lattice parameters are observed until the inverse Li content x = 0.75; then, structure collapses due to complete extraction of Li from between transition metal layers. Combined-phase investigations represent the highest phase barrier and steepest chemical potential after x = 0.75, leading to phase transformations to highly Li-deficient phases with an inactive character. Abrupt phase transformations with heterogeneous structural collapse after x = 0.81 (~220 mAh g−1) were identified in the nanodomain. Further, meso-scale strain distributions show around 5% of anisotropic contraction with lower critical energy release rates, which cause not only micro-crack generations of secondary particles on the interfaces between the contracted primary particles, but also mechanical instability of primary particles from heterogeneous strain changes.

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“…It is caused by HF generated by the hydrolysis of LiPF 6 -containing electrolytes, which initiates the reaction M 2 + + 2F À !MF 2 (M = Ni, Co, Mn). [54][55][56] The reduced Ni 2 + content of the surfacei n SP-NCM effectively alleviates the TMD and loss of active material, thereby facilitating excellent cyclic performance. Therefore, the distribution differenceso ft he valences tates of Ni, Co, and Mn ions on the surface are one of the reasonsf or the difference in the electrochemical performances between SP-NCM and SO-NCM.…”

Section: Resultsmentioning

confidence: 99%

Influence of the Synthesis Route on the Properties of Hybrid NiO–MnCo₂O₄–Ni₆MnO₈ Anode Materials and their Electrochemical Performances

et al. 2020

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New materials with different morphologies, nanostructures, and components can have structural advantages for application in materials science. Multicomponent‐active hybrid nanostructured materials are among the best candidates for application in electrode materials. Spray pyrolysis and solvothermal synthesis are two popular methods for the preparation of multicomponent‐active hybrid nanostructured materials. In this study, the two types of NiO‐MnCo2O4‐Ni6MnO8 hybrid anode materials for use in lithium‐ion batteries were synthesized by two different methods (spray pyrolysis and solvothermal synthesis), and the differences in their physical and electrochemical properties were compared. The two types of anode material exhibited the same hierarchical hybrid composition, but some different physical characteristics, which affected their electrochemical performance.

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An effective method to reduce residual lithium compounds on Ni-rich Li[Ni0.6Co0.2Mn0.2]O2 active material using a phosphoric acid derived Li3PO4 nanolayer

Cited by 323 publications

References 36 publications

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Intrinsic Origins of Crack Generation in Ni-rich LiNi0.8Co0.1Mn0.1O2 Layered Oxide Cathode Material

Influence of the Synthesis Route on the Properties of Hybrid NiO–MnCo₂O₄–Ni₆MnO₈ Anode Materials and their Electrochemical Performances

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An effective method to reduce residual lithium compounds on Ni-rich Li[Ni0.6Co0.2Mn0.2]O2 active material using a phosphoric acid derived Li3PO4 nanolayer

Cited by 323 publications

References 36 publications

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Prospect and Reality of Ni‐Rich Cathode for Commercialization

Intrinsic Origins of Crack Generation in Ni-rich LiNi0.8Co0.1Mn0.1O2 Layered Oxide Cathode Material

Influence of the Synthesis Route on the Properties of Hybrid NiO–MnCo2O4–Ni6MnO8 Anode Materials and their Electrochemical Performances

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Influence of the Synthesis Route on the Properties of Hybrid NiO–MnCo₂O₄–Ni₆MnO₈ Anode Materials and their Electrochemical Performances