Study on Electrochemical Performance of Various Oxides-Coated LiNi0.5Mn1.5O4 Cathode for Lithium Ion Battery

Cho, Seonggyu; Kim, Shinho; Kim, Won‐Ho; Kim, Seok

doi:10.1007/s13391-019-00129-8

Cited by 14 publications

(7 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The 10 ALD cycle coated sample showed a reversible capacity of 85 mA h/g, and in the case of 20 ALD cycle coated sample, the capacity was reduced to merely 41 mA h/g. In contrast to several other studies where wet chemical, mechanochemical, and pulse laser deposition coating methods were applied, we found even a 2 nm thin Al 2 O 3 coating layer to be severely detrimental to the initial reversible capacity. One possible reason for the variety in reported results is the differences in the degree of coating coverage.…”

Section: Resultscontrasting

confidence: 99%

Limitations of Ultrathin Al₂O₃ Coatings on LNMO Cathodes

et al. 2021

View full text Add to dashboard Cite

This study demonstrates the application of Al2O3 coatings for the high-voltage cathode material LiNi0.5–x Mn1.5+x O4−δ (LNMO) by atomic layer deposition. The ultrathin and uniform coatings (0.6–1.7 nm) were deposited on LNMO particles and characterized by scanning transmission electron microscopy, inductively coupled plasma mass spectrometry, and X-ray photoelectron spectroscopy. Galvanostatic charge discharge cycling in half cells revealed, in contrast to many published studies, that even coatings of a thickness of 1 nm were detrimental to the cycling performance of LNMO. The complete coverage of the LNMO particles by the Al2O3 coating can form a Li-ion diffusion barrier, which leads to high overpotentials and reduced reversible capacity. Several reports on Al2O3-coated LNMO using alternative coating methods, which would lead to a less homogeneous coating, revealed the superior electrochemical properties of the Al2O3-coated LNMO, suggesting that complete coverage of the particles might in fact be a disadvantage. We show that transition metal ion dissolution during prolonged cycling at 50 °C is not hindered by the coating, resulting in Ni and Mn deposits on the Li counter electrode. The Al2O3-coated LNMO particles showed severe signs of pitting dissolution, which may be attributed to HF attack caused by side reactions between the electrolyte and the Al2O3 coating, which can lead to additional HF formation. The pitting dissolution was most severe for the thickest coating (1.7 nm). The uniform coating coverage may lead to non-uniform conduction paths for Li, where the active sites are more susceptible to HF attack. Few benefits of applications of very thin, uniform, and amorphous Al2O3 coatings could thus be verified, and the coating is not offering long-term protection from HF attack.

show abstract

Section: Resultscontrasting

confidence: 99%

Limitations of Ultrathin Al₂O₃ Coatings on LNMO Cathodes

et al. 2021

View full text Add to dashboard Cite

show abstract

“…These coated LMNO exhibited structural stability and suppressed Mn dissolution with high capacity retention. 88 Ben et al employed Ta 2 O 5 as a coating material. Ta 2 O 5 coated LMNO exhibited high capacity retention and better cycling performances at room temperature and 55 °C.…”

Section: Methods Improving Electrochemical Performances Of Limn 15 Ni...mentioning

confidence: 99%

“…Cho et al presented three different coating materials: SiO 2 , Al 2 O 3 , TiO 2 , and MgCO 3 . These coated LMNO exhibited structural stability and suppressed Mn dissolution with high capacity retention . Ben et al.…”

Section: Methods Improving Electrochemical Performances Of Limn15ni05o4mentioning

confidence: 99%

Recent Progress of High Voltage Spinel LiMn_1.5Ni_0.5O₄ Cathode Material for Lithium-Ion Battery: Surface Modification, Doping, Electrolyte, and Oxygen Deficiency

Choi,

Feng,

Xia

2024

ACS Omega

View full text Add to dashboard Cite

High voltage spinel LiMn1.5Ni0.5O4 (LMNO) is a promising energy storage material for the next generation lithium batteries with high energy densities. However, due to the major controversies in synthesis, structure, and interfacial properties of LMNO, its unsatisfactory performance is still a challenge hindering the technology’s practical applications. Herein, this paper provides general characteristics of LiMn1.5Ni0.5O4 such as spinel structure, electrochemical properties, and phase transition. In addition, factors such as electrolyte decomposition and morphology of LMNO that influence the electrochemical performances of LMNO are introduced. The strategies that enhance the electrochemical performances including coating, doping, electrolytes, and oxygen deficiency are comprehensively discussed. Through the discussion of the present research status and presentation of our perspectives on future development, we provide the rational design of LMNO in realizing lithium-ion batteries with improved electrochemical performances.

show abstract

“…As reported in previous literature studies, the materials used for surface coating are mainly divided into oxides (SiO 2 , TiO 2 , Al 2 O 3 , etc. − ), ion conductors (Li 7 La 3 Zr 2 O 12 , Li 1.4 Al 0.4 Ti 1.6 (PO 4 ) 3 , etc. ,, ), and polymers. − Among the conventional oxides, SiO 2 does not react with common acids and bases, having excellent chemical stability. It can also be used as a HF scavenger to avoid the attack of HF generated by the decomposition of electrolyte, thereby protecting the cathode material from HF corrosion.…”

Section: Introductionmentioning

confidence: 99%

Improving Electrochemical Performance of High-Voltage Spinel LiNi_0.5Mn_1.5O₄ Cathodes by Silicon Oxide Surface Modification

Wen

Qiao

et al. 2021

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

is considered as a next generation lithiumion battery (LIB) cathode material worth studying on account of its outstanding features. However, it is held back by poor cycling performance originated from the structure instability and side reactions. Here, spinel LNMO is decorated homogeneously via a facile hydrolysis and adsorption of γ-methyl-propylene trimethoxysilane (KH570), followed by thermal treatment at 750 °C, to bring a SiO 2 modification shell at the surface of LNMO and realize the ion doping of Si. The sintering process also brings more Mn 3+ in LNMO. However, only a moderate increase of Mn 3+ in LNMO can enhance the conductivity of ions and electrons, benefiting the enhancement of rate performance. The 0.8%-SiO 2 @LNMO cathode exhibits a high reversible capacity of 129 mAh g −1 , retaining a great capacity retention of 88% after 800 cycles at 1 C and 89.7% after 1000 cycles at 3 C. Meanwhile, a superior rate capability (90 mAh g −1 at 5 C) is achieved by applying the galvanostatic charge/discharge test.

show abstract

Study on Electrochemical Performance of Various Oxides-Coated LiNi0.5Mn1.5O4 Cathode for Lithium Ion Battery

Cited by 14 publications

References 58 publications

Limitations of Ultrathin Al₂O₃ Coatings on LNMO Cathodes

Limitations of Ultrathin Al₂O₃ Coatings on LNMO Cathodes

Recent Progress of High Voltage Spinel LiMn_1.5Ni_0.5O₄ Cathode Material for Lithium-Ion Battery: Surface Modification, Doping, Electrolyte, and Oxygen Deficiency

Improving Electrochemical Performance of High-Voltage Spinel LiNi_0.5Mn_1.5O₄ Cathodes by Silicon Oxide Surface Modification

Contact Info

Product

Resources

About

Study on Electrochemical Performance of Various Oxides-Coated LiNi0.5Mn1.5O4 Cathode for Lithium Ion Battery

Cited by 14 publications

References 58 publications

Limitations of Ultrathin Al2O3 Coatings on LNMO Cathodes

Limitations of Ultrathin Al2O3 Coatings on LNMO Cathodes

Recent Progress of High Voltage Spinel LiMn1.5Ni0.5O4 Cathode Material for Lithium-Ion Battery: Surface Modification, Doping, Electrolyte, and Oxygen Deficiency

Improving Electrochemical Performance of High-Voltage Spinel LiNi0.5Mn1.5O4 Cathodes by Silicon Oxide Surface Modification

Contact Info

Product

Resources

About

Limitations of Ultrathin Al₂O₃ Coatings on LNMO Cathodes

Limitations of Ultrathin Al₂O₃ Coatings on LNMO Cathodes

Recent Progress of High Voltage Spinel LiMn_1.5Ni_0.5O₄ Cathode Material for Lithium-Ion Battery: Surface Modification, Doping, Electrolyte, and Oxygen Deficiency

Improving Electrochemical Performance of High-Voltage Spinel LiNi_0.5Mn_1.5O₄ Cathodes by Silicon Oxide Surface Modification