A dithiol-based new electrolyte additive for improving electrochemical performance of NCM811 lithium ion batteries

Wan, Shuang; Chen, Shimou

doi:10.1007/s11581-020-03768-2

Cited by 19 publications

(21 citation statements)

References 51 publications

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“…Therefore, we can consider that the BTJ-L polymer coating layer functions also as an artificial CEI layer, impairing TM dissolution from the cathode active materials in the carbonatebased electrolytes. 5,10,41 Figure 9a,b present the Nyquist plots of the coin cells incorporating the pristine NCM811 and 1 wt % BTJ-L@ NCM811 electrodes, conducted at 1C before and after 100 cycles, respectively. Prior to cycling (see Figure 9a), the bulk resistance (R b ) and charge transfer resistance (R ct ) values of the cells containing the 1 wt % BTJ-L@NCM811 electrode (2.5 and 102.2 Ω, respectively) were slightly lower than those of the cells with the pristine NCM811 electrode (3.1 and 122.1 Ω, respectively), likely enabling faster charge carrier transport at high C rates, as revealed in Figure 8a and Table S2.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…We conclude that the NCM811 electrode modified with the BTJ-L oligomer additive could effectively alleviate the side reactions between the electrolyte and the electrode, resulting from the inhibition of CEI layer formation in the presence of the BTJ-L protective layer, as revealed in Table S5. 5,10,41,43 Consequently, the electrochemical performance was greatly enhanced.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The BTJ-L oligomer layer modifying the NCM811 active materials apparently protected the core materials against HF attack (it functioned as a protection layer), even at elevated temperature. Therefore, we can consider that the BTJ-L polymer coating layer functions also as an artificial CEI layer, impairing TM dissolution from the cathode active materials in the carbonate-based electrolytes. ,, …”

Section: Resultsmentioning

confidence: 99%

“…Lithium-ion batteries (LIBs) are being applied extensively in contemporary consumer electronics, electric vehicles, and energy storage systems because of their high energy density, long cycle life, and high safety. − High-nickel-content LiNi x Co y Mn 1– x – y O 2 layer structured oxides (Ni-rich NCM; x ≥ 0.6) are increasingly being considered as promising candidate cathode materials for LIBs as the result of their exploitable high specific capacities (ca. 200–250 mAh g –1 ), high operating voltages (≥4.3 V vs Li|Li + ), and relatively low manufacturing costs. − Nevertheless, Ni-rich NCM cathode materials can experience structural and thermal instabilities in the delithiated state, thereby affording poor C-rate capability and severe cycling degradation when they are operated at high cutoff voltages and high temperatures. Those limitations of LIBs incorporating Ni-rich NCM cathode materials are mainly attributed to the formation of a thick cathode electrolyte interfacial (CEI) layer on the electrode surface, electrolyte decomposition, and dissolution of transition metal (TM) ions as well as transformations of the cathode surface induced by TM rearrangement and oxygen loss .…”

Section: Introductionmentioning

confidence: 99%

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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

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: ■ Results and Discussionmentioning

confidence: 99%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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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

Pham

Yang

et al. 2022

ACS Sustainable Chem. Eng.

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“…This capacity retention was due to the ability of DTO to hinder carbonate and nickel decomposition in the cell, forming a full-bodied cathode interfacial layer. Furthermore, CEI reduces the polarization and internal resistance of the cell [293]. Mccloskey and co-workers included various additives (<5% volume) in a LiFePO4/graphite cell.…”

Section: Electrolyte Solvent Modificationsmentioning

confidence: 99%

Growth Mechanism of Micro/Nano Metal Dendrites and Cumulative Strategies for Countering Its Impacts in Metal Ion Batteries: A Review

et al. 2021

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Metal-ion batteries are capable of delivering high energy density with a longer lifespan. However, they are subject to several issues limiting their utilization. One critical impediment is the budding and extension of solid protuberances on the anodic surface, which hinders the cell functionalities. These protuberances expand continuously during the cyclic processes, extending through the separator sheath and leading to electrical shorting. The progression of a protrusion relies on a number of in situ and ex situ factors that can be evaluated theoretically through modeling or via laboratory experimentation. However, it is essential to identify the dynamics and mechanism of protrusion outgrowth. This review article explores recent advances in alleviating metal dendrites in battery systems, specifically alkali metals. In detail, we address the challenges associated with battery breakdown, including the underlying mechanism of dendrite generation and swelling. We discuss the feasible solutions to mitigate the dendrites, as well as their pros and cons, highlighting future research directions. It is of great importance to analyze dendrite suppression within a pragmatic framework with synergy in order to discover a unique solution to ensure the viability of present (Li) and future-generation batteries (Na and K) for commercial use.

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Electrolytes Design for Extending the Temperature Adaptability of Lithium‐Ion Batteries: from Fundamentals to Strategies

Wan,

Ma,

Wang

et al. 2024

Advanced Materials

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With the continuously growing demand for wide‐range applications, lithium‐ion batteries (LIBs) have been increasingly required to work under conditions that deviate from room temperature. However, commercial electrolytes exhibit low thermal stability at high temperatures and poor dynamic properties at low temperatures, hindering the operation of LIBs under extreme conditions. The bottleneck restricting the practical applications of LIBs has promoted researchers to pay more attention to developing a series of innovative electrolytes. This review primarily covers the design of electrolytes for LIBs from a temperature adaptability perspective. Firstly, we elaborate on the fundamentals of electrolytes concerning temperature, including donor number, dielectric constant, viscosity, conductivity, ionic transport, and theoretical calculations. Secondly, prototypical examples, such as lithium salts, solvent structures, additives, and interfacial layers in both liquid and solid electrolytes, are presented to explain how these factors can affect the electrochemical behavior of LIBs at high or low temperatures. Meanwhile, the principles and limitations of electrolyte design are discussed under the corresponding temperature conditions. Finally, a summary and outlook regarding electrolyte design to extend the temperature adaptability of LIBs are proposed.This article is protected by copyright. All rights reserved

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A dithiol-based new electrolyte additive for improving electrochemical performance of NCM811 lithium ion batteries

Cited by 19 publications

References 51 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

Growth Mechanism of Micro/Nano Metal Dendrites and Cumulative Strategies for Countering Its Impacts in Metal Ion Batteries: A Review

Electrolytes Design for Extending the Temperature Adaptability of Lithium‐Ion Batteries: from Fundamentals to Strategies

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A dithiol-based new electrolyte additive for improving electrochemical performance of NCM811 lithium ion batteries

Cited by 19 publications

References 51 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

Growth Mechanism of Micro/Nano Metal Dendrites and Cumulative Strategies for Countering Its Impacts in Metal Ion Batteries: A Review

Electrolytes Design for Extending the Temperature Adaptability of Lithium‐Ion Batteries: from Fundamentals to Strategies

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Product

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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