2021
DOI: 10.1016/j.cej.2021.129217
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Nanoscale operation of Ni-Rich cathode surface by polycrystalline solid electrolytes Li3.2Zr0.4Si0.6O3.6 coating

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Cited by 20 publications
(9 citation statements)
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“…Moreover, the 3 wt % NCA-Ta 2 O 5 sample represents the best capacity retention (Figure b). The decreased capacity retention of 4 wt % NCA-Ta 2 O 5 may be due to the weakened conductivity of particles caused by a thick coating. These results reveal that an appropriate amount of Ta 2 O 5 modification is conducive to the cycling stability of NCA during long-term cycling. This is because (1) the Ta 2 O 5 coating layer can reduce the direct contact area between the electrolyte and the cathode material, thereby inhibiting the occurrence of side reactions during the period and further reducing the oxidation of the cathode material during the charging process and improve its cycle stability .…”
Section: Results and Discussionmentioning
confidence: 93%
“…Moreover, the 3 wt % NCA-Ta 2 O 5 sample represents the best capacity retention (Figure b). The decreased capacity retention of 4 wt % NCA-Ta 2 O 5 may be due to the weakened conductivity of particles caused by a thick coating. These results reveal that an appropriate amount of Ta 2 O 5 modification is conducive to the cycling stability of NCA during long-term cycling. This is because (1) the Ta 2 O 5 coating layer can reduce the direct contact area between the electrolyte and the cathode material, thereby inhibiting the occurrence of side reactions during the period and further reducing the oxidation of the cathode material during the charging process and improve its cycle stability .…”
Section: Results and Discussionmentioning
confidence: 93%
“…Crystal facet regulation has also been shown to effectual. More active surface exposure, such as (012), (104), and (010) facets, etc., could powerfully increase the capacity and rate performance due to the efficient Li diffusion, while more inactive surface exposures, including (001) facet, could enhance the cycling stability at high-voltage due to the suppressed interfacial side reactions and surface phase transitions. Furthermore, well-designed chemical compositions could achieve the expected structural and electrochemical properties.…”
Section: Discussionmentioning
confidence: 99%
“…[28c,50a,55,56] In general, various crystal facets possess different surface energies, atomic arrangements, and surface reactivities with electrolytes, which could greatly affect the Li diffusion kinetics, transition metal segregations, material crystallinity, and the surface reconstruction of SCNCs. [26a,28c,49,50,51,55-57] Based on DFT calculations, the equilibrium particle shapes of single-crystalline NMC cathodes were mainly composed of nonpolar (104), polar (001), and polar (012) facets, which could be effectively tuned by changing the chemical potentials of oxygen and lithium during synthesis. [50a,55,56] Especially, as shown in Figure 6i, compared with the (012) surface, more (104) surface exposure could be achieved by decreasing the oxygen chemical potential conditions (less O 2 atmosphere, and/or decreased calcinating temperature and time), while higher percentage of exposed (001) facets were obtained by decreasing lithium chemical potential.…”
Section: Particle Shape and Crystal Facet Regulationmentioning
confidence: 99%
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