In operando measurements of kinetics of solid electrolyte interphase formation in lithium-ion batteries

Alemu, Tibebu; Pradanawati, Sylvia Ayu; Chang, Shih-Chang; Lin, Pin-Ling; Kuo, Yu‐Lin; Pham, Quoc‐Thai; Su, Chia‐Hung; Wang, Fuming

doi:10.1016/j.jpowsour.2018.08.039

Cited by 12 publications

(7 citation statements)

References 37 publications

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“…62,64 The peak observed at approximately 536 eV was assigned to oxygen in Li 2 CO 3 . 65 By contrast, in the surface-modified electrodes, the oxygen release decreased with the intensity weakening at approximately 530.7 eV. The second peak at approximately 532.5 eV did not change, which indicated that the oxidation changes during delithiation resulted from Ni 2+ /Ni 4+ .…”

Section: Resultsmentioning

confidence: 86%

“…This intensity fundamentally represented the redox activity of oxygen. The effective number of holes of oxygen in TM–O was proportional to the cathode surface. , The peak observed at approximately 536 eV was assigned to oxygen in Li 2 CO 3 . By contrast, in the surface-modified electrodes, the oxygen release decreased with the intensity weakening at approximately 530.7 eV.…”

Section: Results and Discussionmentioning

confidence: 95%

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Interface Interaction Behavior of Self-Terminated Oligomer Electrode Additives for a Ni-Rich Layer Cathode in Lithium-Ion Batteries: Voltage and Temperature Effects

Wang¹,

Alemu²,

Yeh³

et al. 2019

ACS Appl. Mater. Interfaces

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Self-terminated oligomer additives synthesized from bismaleimide and barbituric acid derivatives improve the safety and performance of lithium-ion batteries (LIBs). This study investigates the interface interaction of these additives and the cathode material. Two additives were synthesized by Michael addition (additive A) and aza-Michael addition (additive B). The electrochemical performances of bare and modified LiNi0.6Mn0.2Co0.2O2 (NMC622) materials are studied. The cycling stability and rate capability of NMC622 considerably improve on surface modification with additive B. According to the differential scanning calorimetry results, the exothermic heat of fully deliathiated NMC622 is dramatically decreased through surface modification with both additives. The electrode surface kinetics and interface interaction phenomena of the additives are determined through surface plasma resonance measurements in operando gas chromatography–mass spectroscopy (GCMS) and in situ soft X-ray absorption spectroscopy (XAS). The binding rate constant of additive B onto NMC622 particles is 1.2–2.3 × 104 M–1 s–1 in the temperature range of 299–311 K, which is ascribed to the strong binding affinity toward the electrode surface. This affinity enhances Li+ diffusion, which allows the electrode modified by additive B to provide high electrochemical performance with superior thermal stability. In operando GCMS reveals that gas evolution due to the electrolyte degradation at the NMC622 surface contributes to safety hazards in the bare NMC622 material. In situ soft XAS indicates the occurrence of structural transformation in the bare NMC622 material after it is fully charged and at elevated temperatures. The NMC622 material is stabilized by incorporating additives. The unique performance of additive B can be attributed to its linear structure that allows superior electrode surface adhesion compared with that of additive A. Therefore, this study presents an optimized working principle of self-terminated oligomers, which can be developed and applied to improve the safety and performance of LIBs.

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Section: Resultsmentioning

confidence: 86%

Section: Results and Discussionmentioning

confidence: 95%

Interface Interaction Behavior of Self-Terminated Oligomer Electrode Additives for a Ni-Rich Layer Cathode in Lithium-Ion Batteries: Voltage and Temperature Effects

Wang¹,

Alemu²,

Yeh³

et al. 2019

ACS Appl. Mater. Interfaces

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“…The marketing of electric vehicles is growing fast due to the restriction policy of using petrol such as Norway in 2025, [1] Netherlands/Germany in 2030 [2] and United Kingdom/France in 2040. [3] In addition, carbon emission becomes a big issue in air pollution, which significantly affects the natural environ-doping, [13] alloy composition, [14] aqueous binder, [15] morphology design, [16] surface modification, [17,18] and electrolyte control, [19] respectively. In addition, Si also suffers a high susceptibility to hydrolysis in aqueous slurry and generates H 2 as a byproduct.…”

Section: Introductionmentioning

confidence: 99%

Investigations of Intramolecular Hydrogen Bonding Effect of a Polymer Brush Modified Silicon in Lithium‐Ion Batteries

Hailu

Ramar

Wang

et al. 2022

Adv Materials Inter

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Gradually eradicating petrolic use is therefore the correct direction for maintaining the environment of the earth. Developing energy storage and saving energy consumption is the key to maintaining a good life. Currently, the lithium-ion battery is one of the best choices for the use of vehicles. However, the energy density of the lithium-ion batteries on current developments is less than 300 Wh kg -1 , which is restricted by the capacity of electrode active materials.Si has the maximum theoretical capacity (4000 mAh g -1 ) compared with the graphite (372 mAh g -1 ) and Li 4 Ti 5 O 12 (175 mAh g -1 ). However, Si can only be used in small amounts as an additive (less than 10 wt%) in commercial battery owing to the problems of volume expansion [6,7] and electrochemical irreversibility. [8,9] In terms of previous discussions, the repeatable pulverization of Si during cycling is the key in decaying the performance. [10,11] With the volume expansion and the pulverization, the new surface area of Si is continuously generated and contacts electrolyte for more solid electrolyte interphase (SEI) formation, which increases the impedance and consumes lithium ions significantly. Moreover, 300-400% volume change of Si during cycling makes it difficult for battery design. Several researches have been investigated for solving those problems of Si such as carbon coating, [12] element Silicon (Si) has the maximum capacity compared with the conventional graphite, which can dramatically increase the energy density of the battery. However, due to some tremendous drawbacks of Si material such as electrochemical irreversibility and volume expansion on alloy reaction, pure Si cannot be used in large quantities in the anode electrode. In this research, a polymer brush core-shell structure (PBCS) on Si nanoparticle provides three significant functions because of the intramolecular effect of hydrogen bonding with PBCS and the binder delivers a good dispersion in the slurry, a mechanical protection during cycling, and excellent ionic conductivity for highrate tests. The carbonyl groups of polymer brush on Si surface are fabricated to enhance lithium-ion diffusion and the adjustment of attraction and repulsion by intramolecular hydrogen bonding effect with binder in between each Si particles. The PBCS-Si electrode shows the first coulombic efficiency is 87.1%; the retentions are 92.5% (0.1C/ 0.1C) for 200 cycles and 86.2% (0.5C/ 0.5C) for 400 cycles. Operando TXM displays that the PBCS structure significantly protects the nano Si from cracking owing to the high elastic function and intramolecular hydrogen bonding effect of the PBCS. With this novel PBCS-Si material, a high energy density lithium-ion battery can be expected.

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“…Recently, the conjugated polymers (CPs) become the most important class of semiconductor materials with conceivable applications in photocatalytic degradation under UV-Vis light [ 22 ]. Furthermore, CPs are applicable in solar cells, fuel cells and rechargeable lithium batteries [ 23 , 24 ]. The wide range of CPs’ application is due to their unique behavior such as low-cost, facile synthesis, excellent electrical and electrochemical activity, high carrier mobility and mechanical properties [ 25 ].…”

Section: Introductionmentioning

confidence: 99%

Surface modification of Ag–CdO with polyaniline for the treatment of 3′,3″,5′,5″-tetrabromophenolsulfonphthalein (BPB) under UV-visible light irradiation

Alemu

Taye

Asefa

et al. 2022

Heliyon

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In operando measurements of kinetics of solid electrolyte interphase formation in lithium-ion batteries

Cited by 12 publications

References 37 publications

Interface Interaction Behavior of Self-Terminated Oligomer Electrode Additives for a Ni-Rich Layer Cathode in Lithium-Ion Batteries: Voltage and Temperature Effects

Interface Interaction Behavior of Self-Terminated Oligomer Electrode Additives for a Ni-Rich Layer Cathode in Lithium-Ion Batteries: Voltage and Temperature Effects

Investigations of Intramolecular Hydrogen Bonding Effect of a Polymer Brush Modified Silicon in Lithium‐Ion Batteries

Surface modification of Ag–CdO with polyaniline for the treatment of 3′,3″,5′,5″-tetrabromophenolsulfonphthalein (BPB) under UV-visible light irradiation

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