Facile synthesis of Li2MoO4 coated LiNi1/3Co1/3Mn1/3O2 composite as a novel cathode for high-temperature lithium batteries

Ren, Xiaoying; Du, Jun‐Ping; Zhang, Pu; Wang, Runbo; Gan, Liao; Wu, Zhu

doi:10.1007/s11581-020-03474-z

Cited by 15 publications

(11 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The chemical composition of the LN83 cathode interface was verified by XPS after the initial and 100 cycles. In detail, all the recovered LN83 cathodes showed C 1s peaks corresponding to C–O (286.0 eV), RCOR (287.2 eV), CO (289.1 eV), and RCO 3 R (291.5 eV), which could be regarded as evidence of electrolyte decomposition in the cell. − However, recovered LN83 cathodes exhibited similar chemical compositions, indicating no severe electrolyte decomposition during the initial cycle (Figure a). After 100 cycles, meaningful differences were observed between the cells (Figure b).…”

Section: Resultsmentioning

confidence: 97%

Edge-Protected Ni-Enriched LiNi_xCo_yMn_zO₂ Cathode Materials by Interface Modification with a Si- and F-Functionalized Surface Modifier

Ahn

Lee

Kim

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

Many advances made in recent years have highlighted Ni-enriched nickel, cobalt, manganese (NCM) material as a prospective positive electrode material for lithium-ion batteries. However, prolonged cycling is limited by several critical issues, including surface instability, gas generation, and transitional metal dissolution upon cycling. Here, we propose a simple interfacial modification approach that uses 1H,1H,2H,2H-perfluorooctyltriethoxysilane (POS) as a coating precursor to improve surface stability. A one-step thermal heat treatment creates bifunctional cathode electrolyte interphase (CEI) layers from F- and Si-functionalized POS, especially at the edge sites of the Ni-enriched NCM cathode, where serious undesired reactions occur during cycling. The POS-modified Ni-enriched NCM cathode exhibits improved cycling retention compared to the unmodified Ni-enriched NCM cathode because parasitic reactions are well suppressed upon cycling. Systematic analyses show an apparent inhibition of electrolyte decomposition in the POS-modified Ni-enriched NCM cathode due to the effective protection of the active edge sites by the artificial POS-derived CEI layers. The dissolution of metal components is also greatly decreased because the Si-functional groups that develop on the POS-derived CEI layers selectively scavenge F– species formed by electrolyte decomposition.

show abstract

Section: Resultsmentioning

confidence: 97%

Edge-Protected Ni-Enriched LiNi_xCo_yMn_zO₂ Cathode Materials by Interface Modification with a Si- and F-Functionalized Surface Modifier

Ahn

Lee

Kim

et al. 2023

ACS Sustainable Chem. Eng.

View full text Add to dashboard Cite

show abstract

“…After the surface treatment, the R ct value between the cathode material and the electrolyte is further reduced, which can be attributed to the transformation of the surface rock-salt layer into a layered phase and a spinel phase with three-dimensional (3D) Li-ion transport channels. In addition, Li 2 MoO 4 generated on the surface is an excellent Li-ion conductor; the R ct value of M-NCM does not increase due to the coating layer. The oxidation/reduction reactions occur on the electrode during the CV test.…”

Section: Resultsmentioning

confidence: 97%

“…Figure c exhibits the presence of Mo ions on the surface of M-NCM, and the peak value of 3d 3/2 of Mo is 232.4 eV, which can be classified as Mo 6+ in Li 2 MoO 4 . This also indicates that the Li 2 MoO 4 layer was successfully prepared on the surface of M-NCM . Because of the low Co content in both NCM and M-NCM, it is difficult to observe the XPS peak.…”

Section: Resultsmentioning

confidence: 98%

“…This also indicates that the Li 2 MoO 4 layer was successfully prepared on the surface of M-NCM. 32 Because of the low Co content in both NCM and M-NCM, it is difficult to observe the XPS peak. However, EDS mapping and inductively coupled plasma optical emission spectroscopy (ICP-OES) results together confirm the presence of Co in them.…”

Section: ■ Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Surface Engineering and Trace Cobalt Doping Suppress Overall Li/Ni Mixing of Li-rich Mn-based Cathode Materials

Chen

Huang

Zeng

et al. 2022

ACS Appl. Mater. Interfaces

View full text Add to dashboard Cite

To supress Li/Ni mixing, the strategy of surface modification and Co doping is proposed. Doping trace Co can suppress Li/Ni mixing in the bulk phase of cathode particles, while the rock-salt shell of a cathode originally containing a large amount of Li/Ni mixed rows can be transformed into a cation-ordered spinel phase and a layered phase on the inside by means of surface engineering. Simultaneously, as a coating layer, the Li2MoO4 nanolayer forms on the surface. With the improved Li-ion diffusion, certain inhibitory effects on voltage attenuation and capacity loss are found. It shows that the surface modification with trace Co dopants greatly reduces the Li/Ni mixing level in the material, beneficial to improving the electrochemical performance. As expected, the Li-rich Mn-based cathode material with a low level of overall Li/Ni mixing shows an initial discharging capacity of 303 mAh g–1. This indicates that the joint application of doping and surface coating effectively enhances the performance of the cathode materials with an ultra-low dosage of Co. This idea is helpful to structure other layered cathode materials by surface engineering.

show abstract

“…In this modification process, the coating sources were first coated on the surface of the precursors (Ni 0.6 Co 0.2 Mn 0.2 (OH) 2 ). Zr and Mo were selected as the coating source as they have been used as stable coating materials and they form Li-M-O oxides (M=Zr or Mo) with good ionic conductivity [34][35]. The coated precursors were then calcined with a lithium source to form the cathode (LiNi 0.6 Co 0.2 Mn 0.2 O 2) and coating layer (Li-Zr-O and Li-Mo-O).…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Properties of All-Solid-State Batteries Using a Surface-Modified LiNi0.6Co0.2Mn0.2O2 Cathode

Lim

Park

2020

J. Electrochem. Sci. Technol

View full text Add to dashboard Cite

Undesirable interfacial reactions between the cathode and sulfide electrolyte deteriorate the electrochemical performance of all-solid-state cells based on sulfides, presenting a major challenge. Surface modification of cathodes using stable materials has been used as a method for reducing interfacial reactions. In this work, a precursor-based surface modification method using Zr and Mo was applied to a LiNi

show abstract

Facile synthesis of Li2MoO4 coated LiNi1/3Co1/3Mn1/3O2 composite as a novel cathode for high-temperature lithium batteries

Cited by 15 publications

References 44 publications

Edge-Protected Ni-Enriched LiNi_xCo_yMn_zO₂ Cathode Materials by Interface Modification with a Si- and F-Functionalized Surface Modifier

Edge-Protected Ni-Enriched LiNi_xCo_yMn_zO₂ Cathode Materials by Interface Modification with a Si- and F-Functionalized Surface Modifier

Surface Engineering and Trace Cobalt Doping Suppress Overall Li/Ni Mixing of Li-rich Mn-based Cathode Materials

Enhanced Electrochemical Properties of All-Solid-State Batteries Using a Surface-Modified LiNi0.6Co0.2Mn0.2O2 Cathode

Contact Info

Product

Resources

About

Facile synthesis of Li2MoO4 coated LiNi1/3Co1/3Mn1/3O2 composite as a novel cathode for high-temperature lithium batteries

Cited by 15 publications

References 44 publications

Edge-Protected Ni-Enriched LiNixCoyMnzO2 Cathode Materials by Interface Modification with a Si- and F-Functionalized Surface Modifier

Edge-Protected Ni-Enriched LiNixCoyMnzO2 Cathode Materials by Interface Modification with a Si- and F-Functionalized Surface Modifier

Surface Engineering and Trace Cobalt Doping Suppress Overall Li/Ni Mixing of Li-rich Mn-based Cathode Materials

Enhanced Electrochemical Properties of All-Solid-State Batteries Using a Surface-Modified LiNi0.6Co0.2Mn0.2O2 Cathode

Contact Info

Product

Resources

About

Edge-Protected Ni-Enriched LiNi_xCo_yMn_zO₂ Cathode Materials by Interface Modification with a Si- and F-Functionalized Surface Modifier

Edge-Protected Ni-Enriched LiNi_xCo_yMn_zO₂ Cathode Materials by Interface Modification with a Si- and F-Functionalized Surface Modifier