2022
DOI: 10.1002/adma.202270026
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Elucidating and Mitigating High‐Voltage Degradation Cascades in Cobalt‐Free LiNiO2 Lithium‐Ion Battery Cathodes (Adv. Mater. 3/2022)

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Cited by 16 publications
(20 citation statements)
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“…It is generally considered that performance deteriorations in ultrahigh-Ni cathodes are tightly associated with the intergranular cracks that originate from the randomly oriented primary grains within secondary particles, which are primarily induced by the build-up of anisotropic mechanical strain due to the dramatic lattice shrinkage of the c -axis from H2 to H3 phase transitions. This further results in detrimental electrode pulverization and electric isolation. What is worse, intergranular cracks will provide more channels for the facile electrolyte permeation into the particle interior, which exacerbates the interfacial side reactions between electrode (containing large amounts of unstable Ni 4+ ) and electrolyte at the fully charged state, further expediting the surface degradations and impedance growth during prolonged cycling. , Various approaches have been made to circumvent these issues for the performance enhancement of ultrahigh-Ni cathodes.…”
Section: Introductionmentioning
confidence: 99%
“…It is generally considered that performance deteriorations in ultrahigh-Ni cathodes are tightly associated with the intergranular cracks that originate from the randomly oriented primary grains within secondary particles, which are primarily induced by the build-up of anisotropic mechanical strain due to the dramatic lattice shrinkage of the c -axis from H2 to H3 phase transitions. This further results in detrimental electrode pulverization and electric isolation. What is worse, intergranular cracks will provide more channels for the facile electrolyte permeation into the particle interior, which exacerbates the interfacial side reactions between electrode (containing large amounts of unstable Ni 4+ ) and electrolyte at the fully charged state, further expediting the surface degradations and impedance growth during prolonged cycling. , Various approaches have been made to circumvent these issues for the performance enhancement of ultrahigh-Ni cathodes.…”
Section: Introductionmentioning
confidence: 99%
“…This approach, however, leads to a more rapid capacity fade during charge/discharge cycling. [ 7–10 ] Therefore, a thorough understanding of the degradation mechanism of Ni‐rich cathode upon high‐voltage cycling is of great importance for the development of high‐energy‐density LIBs.…”
Section: Introductionmentioning
confidence: 99%
“…Figure 4e exhibits the cycling stability conducted at 1 C between 2.7 and 4.5 V, in which the accelerated capacity fading is noticed for both electrodes compared with the voltage range of 2.7–4.3 V, which may be attributed to the irreversible lattice oxygen loss and aggravated electrode/electrolyte interface side reaction at high‐voltage. [ 13 ] Notably, an outstanding capacity retention of 93.1% coupled with a slight voltage drop of 0.124 V is achieved for SrZr‐NCM after 200 cycles, which are still much better than those of NCM (69.5% and 0.514 V, respectively), as confirmed in Figure 4e and Figure S20, Supporting Information, further confirming the reinforced structure/interface stability after Sr/Zr modification. The cycling performances at a high temperature of 55 °C demonstrated that both electrodes suffer severe capacity fading, as shown in Figure 4f, only 68.0% and 93.4% of the initial capacity are retained after 100 cycles for NCM and SrZr‐NCM, respectively.…”
Section: Resultsmentioning
confidence: 56%