Electrochemical and Electronic Charge Transport Properties of Ni-Doped LiMn2O4 Spinel Obtained from Polyol-Mediated Synthesis

Yang, Shuo; Schmidt, Dirk Oliver; Khetan, Abhishek; Schrader, Felix; Jakobi, Simon; Homberger, Melanie; Noyong, Michael; Paulus, Anja; Kungl, Hans; Eichel, Rüdiger-Albert; Pitsch, Heinz; Simon, Ulrich

doi:10.3390/ma11050806

Cited by 25 publications

(9 citation statements)

References 79 publications

(143 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The very low-intensity redox waves centered at around 4.0 V attributed to the Mn 3+ /Mn 4+ redox couple can be clearly seen in the insets. Well-defined and sharp Ni 2+/ Ni 3+ and Ni 3+/ Ni 4+ redox peaks with an average between anodic and cathodic peak potentials of about 4.7 and 4.75 V are observed for both electrodes . Cyclic voltammograms of half-cells are similar but show a subtle difference, as a faint shoulder with a slightly higher current is observed for a potential higher than 4.85 V for LMN–AB.…”

Section: Resultsmentioning

confidence: 82%

Crown Ether Functionalized Conductive Carbon for High-Voltage Spinel LiMn_1.5Ni_0.5O₄/Graphite Cell

Saneifar

Zaghib

Bélanger

2019

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

The effect of functionalization of the carbon additive (acetylene black) of a composite LiMn 1.5 Ni 0.5 O 4 cathode, with benzo-15-crown-5 ether, on the electrode/ electrolyte interfaces and electrochemical behavior of a LiMn 1.5 Ni 0.5 O 4 /Li half-cell and LiMn 1.5 Ni 0.5 O 4 /graphite cell is investigated. Functionalization was achieved by spontaneous reduction of 4′-aminobenzo-15-crown-5 ether by acetylene black (AB). The resulting materials were characterized by infrared spectroscopy and thermogravimetric analysis. Complexation of manganese by benzo-15-crown-5 was investigated using ultraviolet−visible spectroscopy. The electrochemical behavior of cells was studied by galvanostatic cycling and electrochemical impedance spectroscopy. The LiMn 1.5 Ni 0.5 O 4 /Li half-cells with modified acetylene black showed improved capacity retention and Coulombic efficiency compared to LiMn 1.5 Ni 0.5 O 4 /Li half-cells with unmodified acetylene black. A similar behavior was observed for LiMn 1.5 Ni 0.5 O 4 −AB/graphite cells with modified AB. Postmortem energy dispersive X-ray spectroscopy analysis of the graphite anode following constant current cycling showed smaller amounts of fluorine, oxygen, phosphorus (resulting from decomposition products of electrolyte), manganese, and nickel for the full-cell made with crown ether modified AB. The increased cycling performance of the LiMn 1.5 Ni 0.5 O 4 −AB/graphite cell with modified AB can be associated with the presence of grafted groups on the carbon additive of the composite cathode surface, which can trap a fraction of metallic ions dissolving from cathode, thus decreasing the amount of transition metal deposited on the graphite anode. Furthermore, benzo-15-crown-5 crown ether groups on the carbon additive can mitigate parasitic reactions such as electrolyte decomposition and carbon degradation.

show abstract

Section: Resultsmentioning

confidence: 82%

Crown Ether Functionalized Conductive Carbon for High-Voltage Spinel LiMn_1.5Ni_0.5O₄/Graphite Cell

Saneifar

Zaghib

Bélanger

2019

ACS Appl. Energy Mater.

View full text Add to dashboard Cite

show abstract

“…This is one of the deficiencies of both techniques in accurately determining the composition of the compound. The high deviation of the EDX measures is consistent with other reports on this spinel, where the values of the Mn/Ni ratio can range between 0.2 and 5.6, affecting the particle morphology, among other factors . The impurities of the mixed Li–Ni oxide would lower the Ni content in the spinel.…”

Section: Resultsmentioning

confidence: 99%

Simple and Eco‐Friendly Fabrication of Electrode Materials and Their Performance in High‐Voltage Lithium‐Ion Batteries

et al. 2020

View full text Add to dashboard Cite

The huge consumption of rechargeable Li‐ion batteries (LIBs) make it necessary to recover and reuse the different components of spent batteries, thus favoring sustainable development. Graphite is a critical material in the manufacture of the current LIBs so recycling it should be prioritized in the management of spent batteries. In this work, graphite is manually recovered from spent batteries used in smartphones. The impurities from the different components of the batteries are drastically reduced by simple leaching with HCl. This treatment significantly improves the delivered specific capacity, with average values of 300 and 390 mAh g−1 without and with leaching, respectively. To test recycled graphite as an anode material in real cells, it is paired with LiNi0.5Mn1.5O4, the most promising cathode material for high‐voltage batteries. LiCl, produced directly by chlorination of spodumene, is used as the Li source to obtain the spinel sample. The real cell gives satisfactory values for both initial specific capacity (100 mAh g−1) and capacity retention after 100 cycles. These results are comparable to and in some cases even better than those for cells that use commercial graphite and conventional Li sources as primary raw materials. Moreover, the cell shows good performance during the rate capability test; the delivered capacity values decrease smoothly from 73 to 62 mAh g−1 while the rate increases from 0.1 to 1 C.

show abstract

“…the cost of LIBs needs to be decreased on priority. [7,13,[27][28][29][30][31][32][33][34] One way to reduce the price of currently available lithium-ion battery technology is to minimize the cost of cathode and anode materials as they constitute a significant portion of the overall battery price. [35][36][37] There are also several other ways to decrease the price of currently available lithium-ion battery technology: 1) use of cheaper raw materials, 2) development of new materials with low cost, 3) fabrication of high-energy-density batteries, 4) decrease of the material production cost, and 5) lowering the battery manufacturing costs.…”

Section: Introductionmentioning

confidence: 99%

Fast and Scalable Synthesis of LiNi_0.5Mn_1.5O₄ Cathode by Sol–Gel‐Assisted Microwave Sintering

et al. 2021

View full text Add to dashboard Cite

High‐voltage spinel LiNi0.5Mn1.5O4 (LNMO) is a promising cathode material for high‐energy‐density and high‐power‐density lithium‐ion batteries (LIBs). The high cost of the currently available LIBs needs to be addressed urgently for wide application in the transport sector (electric vehicles, buses) and large‐scale energy storage systems (ESS). Of significance, herein, novel fast and scalable microwave‐assisted synthesis of LNMO is reported, which leads to a production cost cut. X‐ray diffraction (XRD) analysis confirms the formation of the desired phase with high crystallinity. Field emission scanning (FE‐SEM) and transmission electron microscopy (TEM) analyses indicate that the synthesized phase is of nanometric size (50–150 nm) due to an extremely short sintering time (20 min). The material synthesized at 750 °C shows a higher initial discharge capacity (130 mA h g−1) than that synthesized at 650 °C (115 mA h g−1). The materials heat treated at higher temperatures show better electrochemical performance in terms of initial capacity, rate capability, and improved cycling. The improved electrochemical performance of LNMO at 750 °C is attributed to the formation of a stable crystal structure, low charge transfer resistance at the electrode/electrolyte interface, high electrical conductivity due to the presence of a disorder structure, and improved ionic diffusivity.

show abstract

Electrochemical and Electronic Charge Transport Properties of Ni-Doped LiMn2O4 Spinel Obtained from Polyol-Mediated Synthesis

Cited by 25 publications

References 79 publications

Crown Ether Functionalized Conductive Carbon for High-Voltage Spinel LiMn_1.5Ni_0.5O₄/Graphite Cell

Crown Ether Functionalized Conductive Carbon for High-Voltage Spinel LiMn_1.5Ni_0.5O₄/Graphite Cell

Simple and Eco‐Friendly Fabrication of Electrode Materials and Their Performance in High‐Voltage Lithium‐Ion Batteries

Fast and Scalable Synthesis of LiNi_0.5Mn_1.5O₄ Cathode by Sol–Gel‐Assisted Microwave Sintering

Contact Info

Product

Resources

About

Electrochemical and Electronic Charge Transport Properties of Ni-Doped LiMn2O4 Spinel Obtained from Polyol-Mediated Synthesis

Cited by 25 publications

References 79 publications

Crown Ether Functionalized Conductive Carbon for High-Voltage Spinel LiMn1.5Ni0.5O4/Graphite Cell

Crown Ether Functionalized Conductive Carbon for High-Voltage Spinel LiMn1.5Ni0.5O4/Graphite Cell

Simple and Eco‐Friendly Fabrication of Electrode Materials and Their Performance in High‐Voltage Lithium‐Ion Batteries

Fast and Scalable Synthesis of LiNi0.5Mn1.5O4 Cathode by Sol–Gel‐Assisted Microwave Sintering

Contact Info

Product

Resources

About

Crown Ether Functionalized Conductive Carbon for High-Voltage Spinel LiMn_1.5Ni_0.5O₄/Graphite Cell

Crown Ether Functionalized Conductive Carbon for High-Voltage Spinel LiMn_1.5Ni_0.5O₄/Graphite Cell

Fast and Scalable Synthesis of LiNi_0.5Mn_1.5O₄ Cathode by Sol–Gel‐Assisted Microwave Sintering