Improvement in the electrochemical stability of Li[Ni0.5Co0.2Mn0.3]O2 as a lithium-ion battery cathode electrode with the surface coating of branched oligomer

Chemere, Endazenaw Bizuneh; Wang, Fuming; Chien, Wen-Chen

doi:10.1016/j.surfcoat.2020.126121

Cited by 15 publications

(2 citation statements)

References 39 publications

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“…A few recent literature reports exploited similar oligomeric additives for LIB cathodes, prepared through polymerization of BMI or bisphenol A diglycidyl ether diacrylate (EA) with barbituric acid (BTA). − Table summarizes the electrochemical performance of the various cathodes after surface modification. Notably, only the LIB cells incorporating the 1 wt % BTJ-L coated NMC811 cathode exhibited a positive discharge capacity ratio of +1.2% and a significantly lower value of R ct relative to its pristine NCM811 counterpart at 1C for the initial and 100th cycles, respectively.…”

Section: Resultsmentioning

confidence: 99%

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Pham

Yang

et al. 2022

ACS Sustainable Chem. Eng.

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In this study, we synthesized a Li-containing "BTJ-L" hybrid oligomerobtained through polymerization of bismaleimide (BMI) with a polyether monoamine (i.e., Jeffamine-M1000, JA), trithiocyanuric acid (TCA), and LiOHand coated it as an additive in various amounts (0.5−2 wt %) onto the surface of a Ni-rich LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) cathode active material, forming BTJ-L@NCM811 electrodes for lithiumion batteries (LIBs). Relative to CR2032 coin-type cells incorporating a pristine NCM811 electrode, the cells with the 1 wt % BTJ-L@NCM811 electrode demonstrated a slightly higher initial discharge capacity (173 mAh g −1 vs171 mAh g −1 ) and higher values of average Coulombic efficiency, CE avg (99.5% vs98.9%) and capacity retention, CR (86.1% vs72.9%) after 100 cycles at 1C. Electrochemical impedance spectroscopy revealed that the decrease in the charge transfer resistance (R ct : 46.7 Ω vs171.1 Ω) and the superior Li + ion diffusivity (D Li + : ∼1.09 × 10 −12 cm 2 s −1 vs ∼1.61 × 10 −13 cm 2 s −1 ) of the cells incorporating the BTJ-L@NCM811 electrode after cycling at 1C could be attributed to the excellent wettability toward the electrolyte and the extra Li + ions contributed by the hybrid BTJ-L oligomer additive. Therefore, the BTJ-L oligomer coating layer functioned much like an artificial cathode electrolyte interphase (CEI) layer, impairing the dissolution of transition metals (TMs) from the cathode materials into the carbonate-based electrolytes. Furthermore, in situ microcalorimetry manifested that the total exothermic heat generation (Q t ) of the coin cells containing the 1 wt % BTJ-L@NCM811 electrode operating at 1C in isothermal modes (35 and 55 °C) during the charging process was dramatically lower (by ca. 45%) relative to that of the cells incorporating the pristine NCM811 electrode. On the basis of an ARC-HWS analysis, the delithiated pristine NCM811 electrode shows thermal reactivity with the electrolyte at a much earlier stage in comparison to the 1 wt % BTJ-L@NCM811 counterpart (843 min vs 1039 min) between 171 and 192 °C. Thus, Ni-rich NCM811 cathode materials coated with trace amounts (i.e., 1 wt %) of the BTJ211-L1 hybrid oligomer additives displayed both enhanced electrochemical performance and remarkably improved thermal stability. Accordingly, this Li-containing BTJ-L hybrid oligomer appears to be a great candidate material for coating high-Ni oxide cathode materials to enhance the safety and electrochemical performance of LIB cells.

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Section: Resultsmentioning

confidence: 99%

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Pham

Yang

et al. 2022

ACS Sustainable Chem. Eng.

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“…To make matters worse, LiOH can defluorinate poly(vinylidene fluoride) (PVDF) as well, causing binder failure . To tackle the above-mentioned issues, various strategies have been developed to stabilize the electrolyte/electrode interface, including the preparation of single-crystal nickel-rich cathodes, electrolyte engineering, controlling the amount of residual lithium, and surface modification of the cathode particles. ,− Gao et al controlled the content of residual lithium by regulating the sintering steps and the lithium salt precursors . As the cathode material is placed in the air for a longer period of time, the residual lithium on the surface will still increase due to the reactions between H 2 O, CO 2 , and LiNi n Co m Mn l O 2 ( n + m + l = 1).…”

Section: Introductionmentioning

confidence: 99%

Surface Coating of NCM523 Cathode Electrodes by the Difunctional Block Copolymer/Lithium Salt Composites

Wu,

Xu,

et al. 2024

Langmuir

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Nickel-rich layered oxide cathodes, such as LiNi 0.5 Co 0.2 Mn 0.3 O 2 (NCM523), are prevalent in high-power batteries owing to their high energy density. However, these cathodes suffer from undesirable side reactions occurring at the cathode/liquid electrolyte interface, leading to inferior interface stability and poor cycle life. To address these issues, herein, an amphiphilic diblock copolymer poly(dimethylsiloxane)-block-poly-(acrylic acid) (PDMS-b-PAA) along with lithium bis-(trifluoromethanesulfonyl)imide (LiTFSI) is utilized for modifying the electrode surface. This modification causes a thin and stable cathode−electrolyte interface (CEI) on the surface of NCM523 particles, as evidenced by XPS, TEM, and EIS analysis. The introduction of this modified interface successfully suppresses the capacity fading of NCM523. After 200 cycles at a rate of 1.0 C, the capacity of the modified NCM523 cathode is 108.7 mAh g −1 , with a capacity retention of 82.8%, while the control samples without the polymer modification display a capacity retention of 72.7%. These results outline the distinct advantage of electrode surface modification with diblock copolymers/LiTFSI for the stabilization of Ni-rich layered oxide cathodes.

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Surface Engineering of Cathode Materials: Enhancing the High Performance of Lithium‐Ion Batteries

Qi,

Wang,

Huang

et al. 2024

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The development and application of lithium‐ion batteries present a dual global prospect of opportunity and challenge. With conventional energy sources facing reserve shortages and environmental issues, lithium‐ion batteries have emerged as a transformative technology over the past decade, owing to their superior properties. They are poised for exponential growth in the realms of electric vehicles and energy storage. The cathode, a vital component of lithium‐ion batteries, undergoes chemical and electrochemical reactions at its surface that directly impact the battery's energy density, lifespan, power output, and safety. Despite the increasing energy density of lithium‐ion batteries, their cathodes commonly encounter surface‐side reactions with the electrolyte and exhibit low conductivity, which hinder their utility in high‐power and energy‐storage applications. Surface engineering has emerged as a compelling strategy to address these challenges. This paper meticulously examines the principles and progress of surface engineering for cathode materials, providing insights into its potential advancements and charting its development trajectory for practical implementation.

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Improvement in the electrochemical stability of Li[Ni0.5Co0.2Mn0.3]O2 as a lithium-ion battery cathode electrode with the surface coating of branched oligomer

Cited by 15 publications

References 39 publications

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Surface Coating of NCM523 Cathode Electrodes by the Difunctional Block Copolymer/Lithium Salt Composites

Surface Engineering of Cathode Materials: Enhancing the High Performance of Lithium‐Ion Batteries

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Improvement in the electrochemical stability of Li[Ni0.5Co0.2Mn0.3]O2 as a lithium-ion battery cathode electrode with the surface coating of branched oligomer

Cited by 15 publications

References 39 publications

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi0.8Co0.1Mn0.1O2 Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Surface Coating of NCM523 Cathode Electrodes by the Difunctional Block Copolymer/Lithium Salt Composites

Surface Engineering of Cathode Materials: Enhancing the High Performance of Lithium‐Ion Batteries

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Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries

Coating of a Novel Lithium-Containing Hybrid Oligomer Additive on Nickel-Rich LiNi_0.8Co_0.1Mn_0.1O₂ Cathode Materials for High-Stability and High-Safety Lithium-Ion Batteries