Combining 5V LiNi0.5Mn1.5O4 spinel and Si nanoparticles for advanced Li-ion batteries

Arrebola, José Carlos; Caballero, Álvaro; Gómez-Cámer, Juan Luis; Hernán, L.; Morales, J.; Sánchez, L.

doi:10.1016/j.elecom.2009.03.014

Cited by 42 publications

(22 citation statements)

References 23 publications

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“…Assuming a constant gas volume, as would be the case for a hard-case cell, the pressure buildup can be expressed as 4: p = n CO 2 (total) K H RT V el RTc el + V gas K H [4] On the other hand, in soft pouch cells, gas evolution would typically lead to expansion (or bulging) of the cell. This volume expansion at a given pressure can be calculated by 5: V = RT n CO 2 (total) p − V el c el K H [5] To assess how much pressure buildup or volume expansion would actually occur in a commercial-scale cell containing 2.5 wt% lithium oxalate in the cathode electrode, we use a similar approximation for a commercial-scale 3 Ah cell as shown in ref.…”

Section: Discussionmentioning

confidence: 99%

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Lithium Oxalate as Capacity and Cycle-Life Enhancer in LNMO/Graphite and LNMO/SiG Full Cells

Solchenbach

Wetjen

Pritzl

et al. 2018

J. Electrochem. Soc.

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In the present study, we explore the use of lithium oxalate as a "sacrificial salt" in combination with lithium nickel manganese spinel (LNMO) cathodes. By online electrochemical mass spectrometry (OEMS), we demonstrate that the oxidation of lithium oxalate to CO 2 (corresponding to 525 mAh/g) occurs quantitatively around 4.7 V vs. Li/Li + . LNMO/graphite cells containing 2.5 or 5 wt% lithium oxalate show an up to ∼11% higher initial discharge capacity and less capacity fade over 300 cycles (12% and 8% vs. 19%) compared to cells without lithium oxalate. In LNMO/SiG full-cells with an FEC-containing electrolyte solution, lithium oxalate leads to a better capacity retention (45% vs 20% after 250 cycles) and a higher coulombic efficiency throughout cycling (∼1%) compared to cells without lithium oxalate. When CO 2 from lithium oxalate oxidation is removed after formation, a similar capacity fading as in LNMO/SiG cells without lithium oxalate is observed. Hence, we attribute the improved cycling performance to the presence of CO 2 in the cells. Further analysis (e.g., FEC consumption by 19 F-NMR) indicate that CO 2 is an effective SEI-forming additive for SiG anodes, and that a combination of FEC and CO 2 has a synergistic effect on the lifetime of full-cells with SiG anodes. Lithium nickel manganese spinel (LiNi 0.5 Mn 1.5 O 4 , LNMO) is a promising cathode material for high energy lithium ion batteries due to its high operating potential around 4.7 V vs. Li/Li + , its high rate capability, structural stability and the absence of cobalt. However, its lower specific capacity (146 mAh/g LNMO ) compared to layered oxide materials (e.g. lithium nickel manganese cobalt oxide (NMC), specific capacity 150-250 mAh/g NMC ) 1 is regarded as a major drawback. In full-cells, the practically achievable capacity of LNMO is even lower, as the formation of the solid-electrolyte interphase (SEI) on the graphite anode consumes active lithium. For many layered oxide cathodes, however, the first cycle irreversible capacity of the cathode is similar to the capacity needed for SEI formation (∼20 mAh/g NMC ), and hence the practical discharge capacity of the cathode and the remaining active lithium are more or less balanced again. 2,3 In contrast, the first cycle irreversible capacity of LNMO (∼6 mAh/g LNMO ) is much lower than the capacity needed for SEI formation. This leads to a mismatch between active lithium and practical cathode capacity, i.e., there is not enough active lithium available to fully discharge the LNMO cathode during subsequent cycling.In cells with silicon-based anodes, active lithium losses on the anode are even higher compared to graphite, as the expansion of the silicon particles during the first lithiation leads to a continuous exposure of fresh, unpassivated silicon surface. 4 On this new surface, electrolyte reduction occurs instantaneously, which reduces the total lithium reservoir in the cell. Therefore, different ideas to increase the amount of active lithium in lithium ion full-cells have been suggested, ...

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Section: Discussionmentioning

confidence: 99%

“…4 On this new surface, electrolyte reduction occurs instantaneously, which reduces the total lithium reservoir in the cell. Therefore, different ideas to increase the amount of active lithium in lithium ion full-cells have been suggested, for example via prelithiation of silicon anodes with metallic lithium.…”

mentioning

confidence: 99%

Lithium Oxalate as Capacity and Cycle-Life Enhancer in LNMO/Graphite and LNMO/SiG Full Cells

Solchenbach

Wetjen

Pritzl

et al. 2018

J. Electrochem. Soc.

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“…In recent years, there have been some researches about full lithium-ion cells. Many 2V lithium-ion battery systems have been studied, such as LiCoO 2 In addition, Arrebola [157] have tried to combine LiNi 0.5 Mn 1.5 O 4 spinel and Si nanoparticles to fabricate new Li-ion batteries. Because Si composite could deliver capacities as high as 3850 (with super P) and 4300 (with MCMC) mAh g -1 , this LiNi 0.5 Mn 1.5 O 4 /Si cell was expected to have higher capacity.…”

Section: Fabrication Advanced Li-ion Batteriesmentioning

confidence: 99%

LiNi0.5Mn1.5O4 Spinel and Its Derivatives as Cathodes for Li-Ion Batteries

Liu¹

2012

Lithium Ion Batteries - New Developments

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“…4. The diffraction peaks at 2h = 18°, 36.5°, 38°, 44°, 48°, 58°, and 64°relate to the doped spinel structure of LMO and LNMO materials [24,25].…”

Section: Resultsmentioning

confidence: 91%

LiMn2O4/CNTs and LiNi0.5Mn1.5O4/CNTs Nanocomposites as High-Performance Cathode Materials for Lithium-Ion Batteries

Nguyên

Luu

et al. 2014

Acta Metall. Sin. (Engl. Lett.)

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The demand of higher energy density and higher power capacity of lithium (Li)-ion secondary batteries has led to the search for electrode materials whose capacities and performance are better than those available today. Carbon nanotubes (CNTs), with their unique properties such as 1D tubular structure, high electrical and thermal conductivities, and extremely large surface area, have been used as materials to prepare cathodes for Li-ion batteries. The structure and morphology of CNTs were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). The functional groups on the purified CNT surface such as -COOH, -OH were characterized by Fourier Transform infrared spectroscopy. The electrode materials were fabricated from LiMn 2 O 4 (LMO), doped spinel LiNi 0.5 Mn 1.5 O 4 , and purified CNTs via solid-state reaction. The structure and morphology of the electrode were characterized using XRD, SEM, and TEM. Finally, the efficiency of the electrode materials using CNTs was evaluated by cyclic voltammetry and electrochemical impedance spectroscopy.

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Combining 5V LiNi0.5Mn1.5O4 spinel and Si nanoparticles for advanced Li-ion batteries

Cited by 42 publications

References 23 publications

Lithium Oxalate as Capacity and Cycle-Life Enhancer in LNMO/Graphite and LNMO/SiG Full Cells

Lithium Oxalate as Capacity and Cycle-Life Enhancer in LNMO/Graphite and LNMO/SiG Full Cells

LiNi0.5Mn1.5O4 Spinel and Its Derivatives as Cathodes for Li-Ion Batteries

LiMn2O4/CNTs and LiNi0.5Mn1.5O4/CNTs Nanocomposites as High-Performance Cathode Materials for Lithium-Ion Batteries

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