Electrochemical Properties of High Nickel Content Li(Ni0.7Co0.2Mn0.1)O2 with an Alumina Thin-Coating Layer as a Cathode Material for Lithium Ion Batteries

Jung, Hoon; Park, Woojung; Holder, Joseph; Yun, Youngjun; Bong, Sungyool

doi:10.1166/jnn.2020.18588

Cited by 7 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can be explained by the fact that the electrochemical potential of Ni is lower than that of Co because the unpaired electron occupying the e g orbital can be removed easily by an electrochemical reaction. − Consequently, h-LNCM cathode materials have a larger specific capacity than LCO cathode materials under typical cutoff cell-charging conditions. In other words, the specific capacity of h-LNCM cathodes can be greatly increased by increasing the Ni content in the layered structure; hence, various h-LNCM cathode materials such as LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622), − LiNi 0.7 Co 0.2 Mn 0.1 O 2 (NCM721), − and LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) − have been developed in recent years.…”

Section: Introductionmentioning

confidence: 99%

Interface-Stabilized Layered Lithium Ni-Rich Oxide Cathode via Surface Functionalization with Titanium Silicate

Lee

Jung

Lee

et al. 2021

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

Nickel-rich lithium metal oxide cathode materials have recently be en highlighted as next-generation cathodes for lithium-ion batteries. Nevertheless, their relatively high surface reactivity must be controlled, as fading of the cycling retention occurs rapidly in the cells. This paper proposes functionalized nickel-rich lithium metal oxide cathode materials by a multipurpose nanosized inorganic materialtitanium silicon oxidevia a simple thermal treatment process. We examined the topologies of the nano-titanium silicate-functionalized nickel-rich lithium metal oxide cathodes with scanning electron microscopy and quantitatively analyzed their improved mechanical properties using microindentation. The cell containing nickel-rich lithium metal oxide cathodes suffered from poor cycling behavior as the electrolytes persistently decomposed; however, this behavior was effectively inhibited in the cell by nano-titanium silicate-functionalized nickel-rich lithium metal oxide cathodes. Further ex situ analyses indicated that the particle hardness of the nano-titanium silicate-functionalized nickel-rich lithium metal oxide cathode materials was maintained, and decomposition of the electrolyte by the dissolution of transition metals was thoroughly inhibited even after 100 cycles. Based on these results, we concluded that the use of nano-titanium silicate as a coating material for nickel-rich lithium metal oxide cathode materials is an effective way to enhance the cycling performance of lithium-ion batteries.

show abstract