1-(2-Cyanoethyl)pyrrole enables excellent battery performance at high temperature <i>via</i> the synergistic effect of Lewis base and CN functional groups

Duan, Kaijia; Ning, Jingrong; Zhou, Liqun; Xu, Wenjia; Feng, Chuanqi; Yang, Tao; Wang, Shiquan

doi:10.1039/d0cc01528h

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…The main doublet peaks located at À 72 and À 73 ppm are attributed to LiPF 6 in both electrolytes. Notably, the characteristic peaks at À 78 ppm for PO 3 F 2À , À 82 to À 90 ppm for PO 2 F 2 À , and À 156 ppm for HF are clearly detected in baseline electrolyte (Figure 1a), [16] which are negligible in the presence of the BA additive (Figure 1b). These fluorochemicals are hydrolysis products of LiPF 6 with H 2 O.…”

Section: Resultsmentioning

confidence: 99%

Benzoic Anhydride as a Bifunctional Electrolyte Additive for Hydrogen Fluoride Capture and Robust Film Construction over High‐Voltage Li‐Ion Batteries

Jiang

Yin

et al. 2021

ChemSusChem

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High-voltage LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811)-based Li-ion batteries (LIBs) with enhanced performance can be achieved by properly tailoring the electrolyte systems. Benzoic anhydride (BA) was proposed here as a promising bifunctional electrolyte additive that can not only construct a robust cathode-electrolyte interface (CEI) film on the electrode surface but also capture HF/H 2 O in the electrolyte effectively. Compared to the cell without the BA additive, the capacity of Li/NCM811 half-cell with 1.0 wt % BA was increased from 128.5 to 149.6 mAh g À 1 after 200 cycles at 1 C between 3.0 and 4.3 V. Even at a higher cut-off voltage of 4.5 V, the BA-containing Li/NCM811 half-cell delivered a capacity retention of 69 % after 200 cycles, much higher than that of the half-cell without the additive (56 %). Both theoretical calculation and experimental results verified that the BA additive could be preferentially oxidized to form a stable interface film with high conductivity that protected the NCM811 cathode and suppressed the decomposition of the electrolyte.

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Section: Resultsmentioning

confidence: 99%

Benzoic Anhydride as a Bifunctional Electrolyte Additive for Hydrogen Fluoride Capture and Robust Film Construction over High‐Voltage Li‐Ion Batteries

Jiang

Yin

et al. 2021

ChemSusChem

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“…The peak corresponding to C 1s was deconvoluted (Figure 2b), to obtain three peaks at 284.7, 285.6, and 287.8 eV corresponding to CC, CN/C−N, and CO, respectively. 41 Figure 2c shows the deconvoluted N 1s spectra consisting of two peaks at 399.1 and 400.5 eV corresponding to CN and C−N 42 functional groups present in the PBM. IR spectra revealed a similar functional group composition, i.e., the formation of imine bonds (1655 cm −1 in IR, 399.1 eV in XPS) is confirmed in these studies.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…XPS survey spectra showed the presence of carbon, nitrogen, and oxygen atoms in the PBM moiety at their respective binding energies. The peak corresponding to C 1s was deconvoluted (Figure b), to obtain three peaks at 284.7, 285.6, and 287.8 eV corresponding to CC, CN/C–N, and CO, respectively Figure c shows the deconvoluted N 1s spectra consisting of two peaks at 399.1 and 400.5 eV corresponding to CN and C–N functional groups present in the PBM.…”

Section: Resultsmentioning

confidence: 99%

BIAN-Based Porous Organic Polymer as a High-Performance Anode for Lithium-Ion Batteries

Mantripragada

Badam

Matsumi

2022

ACS Appl. Energy Mater.

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Lithium-ion batteries are heralded as potential candidates for large-scale energy storage applications. The low specific capacity or poor cyclability of commonly used anodes limit the extensive application of lithium-ion batteries. In this context, organic molecules can offer a potential solution to extend the scope of lithium-ion battery application. In this work, we demonstrate the synthesis and electrochemical properties of a nitrogen-rich, n-type porous organic polymer bearing BIAN and melamine moieties (PBM). The PBM exhibits a porosity of 1.5 nm and excellent electrochemical performance in terms of its rate capability, cycling behavior, and capacity. The anodic half-cell of the PBM active material delivers specific capacities of 850 mAh/g at 400 mA/g, 740 mAh/g at 750 mA/g, and 300 mAh/g at 1000 mA/g current densities with an excellent cyclability over 3000, 2000, and 1100 cycles, respectively, at each current density. Thus, this material is a promising candidate as an anodic material in lithium-ion batteries.

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“…Specific additives (Fig. 11) including salts, such as lithium benzimidazole, 122 lithium fluorosulfonimide salts, 123 lithium bisoxalatoborate 124 and lithium 4,5-dicyano-2-(trifluoromethyl)imidazole, 125 or neutral molecules, such as diphenyldimethoxysilane 126 and 1-(2-cyanoethyl)pyrrole 127 are dedicated to trap PF 5 or HF, but they do not hinder the PF 6 − degradation. Their low concentration (few wt% of additives) may not be sufficient to stop gas generation over the entire life of the battery.…”

Section: • Electrolyte Thermal Degradationmentioning

confidence: 99%

Review—Gassing Mechanisms in Lithium-ion Battery

Salomez¹,

Grugeon²,

Armand³

et al. 2023

J. Electrochem. Soc.

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This paper provides a holistic view of the different studies related to gassing in NMC/graphite lithium-ion batteries over the past couple of decades of scientific development. It underlines the difficulty of predicting the concentration and the proportion of gas released upon cycling and storage and to get a clear mechanistic insight into the reduction and oxidation pathways of electrolyte solvents, the thermal electrolyte degradation, as well as the reactions that involve secondary sources such as water, NMC surface species and cross-talk reactions. Though many relevant experiments such as operando gas analysis using isotope-labeled solvents or two-compartment cells have been conducted, they failed, for instance, to determine the exact mechanism leading to the generation of CO and CO2 gas. Last but not least, this paper discusses different strategies that are currently proposed to reduce or eliminate gassing such as the use of electrolyte additives that enable singlet oxygen quenching or scavenging, NMC coatings that limit the contact with electrolyte and different lithium salts to prevent thermal electrolyte degradation.

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1-(2-Cyanoethyl)pyrrole enables excellent battery performance at high temperature via the synergistic effect of Lewis base and CN functional groups

Abstract: 1-(2-Cyanoethyl)pyrrole electrolyte additive via a capturing strategy enables high-performance of lithium-ion batteries at high temperature.

Cited by 7 publications

References 22 publications

Benzoic Anhydride as a Bifunctional Electrolyte Additive for Hydrogen Fluoride Capture and Robust Film Construction over High‐Voltage Li‐Ion Batteries

Benzoic Anhydride as a Bifunctional Electrolyte Additive for Hydrogen Fluoride Capture and Robust Film Construction over High‐Voltage Li‐Ion Batteries

BIAN-Based Porous Organic Polymer as a High-Performance Anode for Lithium-Ion Batteries

Review—Gassing Mechanisms in Lithium-ion Battery

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