Synthesis of LiMn<sub>2</sub>O<sub>4</sub> with Outstanding Lithium‐Insertion Kinetics and Long‐Term Stability

Laszczynski, Nina; Zamory, Jan von; Loeffler, Nicholas; Cho, Gyu-Bong; Kim, Guk‐Tae; Passerini, Stefano

doi:10.1002/celc.201402057

Cited by 8 publications

(4 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We have also addressed the issues related to the structure of LMO nanoparticles, that is, (1) their stability and phase transition induced on the surfaces such as the transformation into a monoclinic layered LMO at the surface;(2) cation exchange of Li and Mn from the 8a position to the 16d position induced by Li insertion in the 16c site; (3) exchange of Mn from the 16d to the 16c position for which Li octahedral occupation leads to a lower available amount of Li + ions for exchange during cycling; and (4) occupation of the 16c octahedral site by Al 3+ ions and the reduced Mn valency …”

Section: Introductionmentioning

confidence: 99%

Electrochemical Response and Structural Stability of the Li⁺ Ion Battery Cathode with Coated LiMn₂O₄ Nanoparticles

Parmar

Rezvani

Nobili

et al. 2020

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

Mn dissolution is the main drawback of LiMn2O4 cathodes, leading to capacity fading and anode poisoning. It is well known that improved capacity/cycling performances have been obtained by the Al2O3 coating. It is less clear what is the effect of the coating from the point of view of the fundamental processes occurring within the active material and on the interface with the active material, especially during the first cycle, when a dynamical interaction at a high voltage with an electrolyte and a binder leads to the formation of a passivation layer. We present here the close comparison of coated and uncoated electrodes’ X-ray absorption analysis at the interface during the measurements of several charged/discharged states of the electrode. The Al2O3 coating is significantly effective for stopping the high voltage instability of the battery, especially, when the Mn–O couple reacts with organic species, limiting Mn capture and the electrolyte reaction with the oxide surface. In the low-voltage discharge, on the other hand, more complex structure/electronic modifications occur. The presence of the coating limits disproportionation, preventing a general corrosion with dissolution of the Mn2+ species, and hence improves the electrode performance. From the structural point of view, the signatures of the transformations and a reversible modification of the surface character of the nanoparticles from a spinel to a defective phase are observed, while no charge transfer between the coating and manganese oxide is found. The role of nonthermodynamic interphase formation by means of proton transfer is enhanced for the coated oxide particles.

show abstract

Section: Introductionmentioning

confidence: 99%

Electrochemical Response and Structural Stability of the Li⁺ Ion Battery Cathode with Coated LiMn₂O₄ Nanoparticles

Parmar

Rezvani

Nobili

et al. 2020

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…Among the cathode materials, spinel LiMn 2 O 4 has received widespread attention for large-scale application due to the high abundance, nontoxicity, good thermal stability and high security 1–3 . However, LiMn 2 O 4 suffers from sever capacity fading upon long electrochemical cycling at elevated temperature owing to the dissolution of manganese (Mn 3+ → Mn 4+ + Mn 2+ ), Jahn-Teller effects, and so on 4,5 .…”

Section: Introductionmentioning

confidence: 99%

Enhancing the durable performance of LiMn2O4 at high-rate and elevated temperature by nickel-magnesium dual doping

Guo

Xiang

et al. 2019

Sci Rep

View full text Add to dashboard Cite

Various nickel and magnesium dual-doped LiNixMg0.08Mn1.92−xO4 (x ≤ 0.15) were synthesized via a modified solid-state combustion method. All as-prepared samples show typical spinel phase with a well-defined polyhedron morphology. The Ni-Mg dual-doping obviously decreases the lattice parameter that gives rise to the lattice contraction. Owing to the synergistic merits of metal ions co-doping, the optimized LiNi0.03Mg0.08Mn1.89O4 delivers high initial capacity of 115.9 and 92.9 mAh·g−1, whilst retains 77.1 and 69.7 mAh·g−1 after 1000 cycles at 1 C and high current rate of 20 C, respectively. Even at 10 C and 55 °C, the LiNi0.03Mg0.08Mn1.89O4 also has a discharge capacity of 92.2 mAh·g−1 and endures 500 cycles long-term life. Such excellent results are contributed to the fast Li+ diffusion and robust structure stability. The anatomical analysis of the 1000 long-cycled LiNi0.03Mg0.08Mn1.89O4 electrode further demonstrates the stable spinel structure via the mitigation of Jahn-Teller effect. Hence, the Ni-Mg co-doping can be a potential strategy to improve the high-rate capability and long cycle properties of cathode materials.

show abstract

“…Indeed, much effort has been devoted into overcoming dissolution. In fact, dissolution has been effectively suppressed by partial replacement of manganese with other metals, synthesis of lithium‐overstoichiometric Li 1+ x Mn 2− x O 4 ,, and low‐temperature calcination of LiMn 2 O 4 . On the other hand, the influence of the surface film on the electrochemical properties of LiMn 2 O 4 in not fully understood yet.…”

Section: Introductionmentioning

confidence: 99%

Investigation on Surface-Film Formation Behavior of LiMn₂ O₄ Thin-Film Electrodes in LiClO₄ /Propylene Carbonate

et al. 2017

View full text Add to dashboard Cite

LiMn 2 O 4 is a positive active material with great application in lithium-ion batteries. However, degradation of LiMn 2 O 4 during the charge-discharge cycle is a significant problem. In this study, we focused on the surface-film formation, which is considered one of the major factors leading to degradation. The surface-film formation behavior on LiMn 2 O 4 thin-film electrodes in LiClO 4 /propylene carbonate (PC) at room and elevated temperatures was investigated. The redox reaction of ferrocene on the cycled LiMn 2 O 4 indicates that no passivation occurs at 30 8C, whereas passivation proceeds at 55 8C. Spectroscopic methods revealed that decomposed PC products exist on LiMn 2 O 4 cycled at 55 8C. It is indicated that oxidative decomposition of PC catalytically proceeds on the manganese site of LiMn 2 O 4 at 55 8C, and Mn 2 O 3 is formed simultaneously at the surface. The operation temperature strongly affects both the LiMn 2 O 4 surface-film formation and structural deterioration.

show abstract

Synthesis of LiMn₂O₄ with Outstanding Lithium‐Insertion Kinetics and Long‐Term Stability

Cited by 8 publications

References 26 publications

Electrochemical Response and Structural Stability of the Li⁺ Ion Battery Cathode with Coated LiMn₂O₄ Nanoparticles

Electrochemical Response and Structural Stability of the Li⁺ Ion Battery Cathode with Coated LiMn₂O₄ Nanoparticles

Enhancing the durable performance of LiMn2O4 at high-rate and elevated temperature by nickel-magnesium dual doping

Investigation on Surface-Film Formation Behavior of LiMn₂ O₄ Thin-Film Electrodes in LiClO₄ /Propylene Carbonate

Contact Info

Product

Resources

About

Synthesis of LiMn2O4 with Outstanding Lithium‐Insertion Kinetics and Long‐Term Stability

Cited by 8 publications

References 26 publications

Electrochemical Response and Structural Stability of the Li+ Ion Battery Cathode with Coated LiMn2O4 Nanoparticles

Electrochemical Response and Structural Stability of the Li+ Ion Battery Cathode with Coated LiMn2O4 Nanoparticles

Enhancing the durable performance of LiMn2O4 at high-rate and elevated temperature by nickel-magnesium dual doping

Investigation on Surface-Film Formation Behavior of LiMn2 O4 Thin-Film Electrodes in LiClO4 /Propylene Carbonate

Contact Info

Product

Resources

About

Synthesis of LiMn₂O₄ with Outstanding Lithium‐Insertion Kinetics and Long‐Term Stability

Electrochemical Response and Structural Stability of the Li⁺ Ion Battery Cathode with Coated LiMn₂O₄ Nanoparticles

Electrochemical Response and Structural Stability of the Li⁺ Ion Battery Cathode with Coated LiMn₂O₄ Nanoparticles

Investigation on Surface-Film Formation Behavior of LiMn₂ O₄ Thin-Film Electrodes in LiClO₄ /Propylene Carbonate