Succinonitrile as a high‐voltage additive in the electrolyte of LiNi0.5Co0.2Mn0.3O2/graphite full batteries

Han, Songyi; Yan, Liu; Zhang, Hong; Fan, Chaojun; Fan, Weizhen; Yu, Le; Du, Xue‐Yong

doi:10.1002/sia.6744

Cited by 30 publications

(10 citation statements)

References 30 publications

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“…In addition to adding high‐voltage additives, researchers have improved the high‐voltage performance of lithium‐ion batteries by replacing carbonate solvents with new solvents with strong oxidation resistance. The antioxidant solvents currently studied mainly include dinitriles, [29] sulfones, ionic liquids, and fluorinated reagents, and researchers have conducted a lot of in‐depth studies on the feasibility of these four types of antioxidant solvents for high‐voltage electrolytes. For example, Xiang et al [30] .…”

Section: Introductionmentioning

confidence: 99%

Tetraethylthiophene‐2,5‐diylbismethylphosphonate: A Novel Electrolyte Additive for High‐Voltage Batteries

et al. 2021

ChemSusChem

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In this work, a novel high‐voltage electrolyte additive, tetraethylthiophene‐2,5‐diylbismethylphosphonate (TTD), was synthesized, and the influence of TTD on the electrolyte and its electrochemical performance under different voltages were studied by changing the content of the TTD additive. The results showed that the TTD additive significantly improved the capacity, cycle stability, and rate capability of batteries when charging/discharging at high voltages. After adding 1 % TTD to the basic electrolyte, the capacity retention rate of batteries after 200 cycles at 4.2, 4.3, 4.4, and 4.5 V increased by 20.8, 18.3, 50, and 31.9 %, respectively. In addition, transmission electron microscopy (TEM) and X‐ray photoelectron spectroscopy (XPS) results showed that TTD could effectively inhibit the decomposition of the electrolyte and participate in the formation of a uniform, thin, and stable cathode electrolyte interphase (CEI) film on the electrode surface, thereby effectively inhibiting the side reaction between the electrolyte decomposition product and the CEI membrane, and finally improving the high‐voltage performance of the battery. The TTD additive may provide a cost‐effective solution for high‐performance high‐voltage electrolytes.

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Section: Introductionmentioning

confidence: 99%

Tetraethylthiophene‐2,5‐diylbismethylphosphonate: A Novel Electrolyte Additive for High‐Voltage Batteries

et al. 2021

ChemSusChem

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“…40,41 It is important to note that the potential stability window can be significantly reduced in practical scenarios due to the catalytic effect of active materials, traces of water in the battery, and lithium salt. 42,43 The interaction between 8AP and the electrolyte was studied by Raman spectroscopy (Figure S9). Most groups from GO at 1596 and 1337 cm −1 can be observed after soaking with electrolyte (Figure S9).…”

Section: Resultsmentioning

confidence: 99%

Stabilizing Lithium Metal Batteries by Synergistic Effect of High Ionic Transfer Separator and Lithium–Boron Composite Material Anode

Naren,

Jiang,

Qing

et al. 2023

ACS Nano

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The development of lithium (Li) metal batteries (LMBs) has been limited by problems, such as severe dendrite growth, drastic interfacial reactions, and large volume change. Herein, an LMB (8AP@LiB) combining agraphene oxide-poly(ethylene oxide) (PEO) functionalized polypropylene separator (8AP) with a lithium−boron (LiB) anode is designed to overcome these problems. Raman results demonstrate that the PEO chain on 8AP can influence the Li + solvation structure in the electrolyte, resulting in Li + homogeneous diffusion and Li + deposition barrier reduction. 8AP exhibits good ionic conductivity (4.9 × 10 −4 S cm −1 ), a high Li + migration number (0.88), and a significant electrolyte uptake (293%). The 3D LiB skeleton can significantly reduce the anode volume changes and local current density during the charging/discharging process. Therefore, 8AP@LiB effectively regulates the Li + flux and promotes the uniform Li deposition without dendrites. The Li||Li symmetrical cells of 8AP@LiB exhibit a high electrochemical stability of up to 1000 h at 1 mA cm −2 and 5 mAh cm −2 . Importantly, the Li||LiFePO 4 full cells of 8AP@LiB achieve an impressive 2000 cycles at 2C, while maintaining a high-capacity retention of 86%. The synergistic effect of the functionalized separator and LiB anode might provide a direction for the development of high-performance LMBs.

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“…[1][2][3] In view of this, high-voltage cathodes (layered oxide Li[Ni x Co y Mn 1−x−y ]O 2 or spinel LiM 2 O 4 ) and high-voltage electrolytes (fluorinated solvents or nitrile compounds) are developed maturely. [4][5][6][7] Unfortunately, there is a bottleneck-the corrosion (anodic dissolution) of traditional cathode current collector still hinders the application of high-voltage LIBs, leading to the increase of internal resistance, the shedding of electrode material, and the rapid decay of capacity. [8,9] Therefore, it is indispensable to improve the corrosion resistance of cathode current collector at high voltage.…”

Section: Introductionmentioning

confidence: 99%

MXene‐Ti₃C₂ Armored Layer for Aluminum Current Collector Enable Stable High‐Voltage Lithium‐Ion Battery

Yang

et al. 2022

Adv Materials Inter

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considerable electrochemical stability, which is ascribed to the natural passivation layer Al 2 O 3 . [10] The Al 2 O 3 layer could availably prevent Al from corrosion in an ideal state (absence of water, voltage <4.0 V versus Li/Li + approximately). [11][12][13] Obviously, it is hardly to achieve an anhydrous environment and corresponding strategies are adopted to deal with the aluminum oxidation after passivation layer breakdown. Modulating electrolyte composition is effective, including additives, [14,15] superconcentrated electrolytes [16,17] or new lithium salts [18,19] and solvents. [20,21] And recently, the modification of Al current collector has gradually attracted scientific attention, such as in situ chemical conversion [22,23] or passivation layer assembly. [24][25][26] An advanced artificial passivation layer we anticipate should simultaneously resist corrosion and conduct electricity. In addition, the power and energy trade-off of LIBs restricts the thickness of artificial passivation layer. [27] Naturally, designing a suitable Al current collector is challenging and meaningful.MXene (Ti 3 C 2 T x ) nanosheets, as a member of 2D transition metal carbides, own extraordinary conductivity, abundant adjustable functional groups (OH, O, or F) and unique layered structure, [28][29][30][31] which are frequently employed as active material or conductive substrate to construct nanocomposite electrodes. [32] Furthermore, MXene also possesses a foundation for anticorrosion (high strength, modulus, and chemical stability). In inorganic system, MXene is requisitioned as a combined physical barrier enhancer to metal protection. [33][34][35] Consequently, the better electrochemical stability of MXene in organic environment makes it an innovative perspective to protect Al current collector solely in high-voltage LIBs. Herein, for the first time, an MXene armored layer was fabricated on pure Al current collector (MXene-Al) via a simple self-assembly procedure, which is homogeneous and ultrathin (<100 nm), protecting Al matrix in LiPF 6 -carbonates electrolyte without compromising conductivity. In Li||LiCo 1/3 Ni 1/3 Mn 1/3 O 2 (NCM333) system with a high cut-off voltage of 4.5 V, cells with MXene-Al possess an enhanced electrochemical performance. The discharge capacity retention reaches up to 81.4% after 300 cycles at 0.5 C, while that of pristine Al is only 21%. The self-discharge propensity is alleviative and rate/power performance is improved. Elevating operating voltage (above 4.5 V) is a consequential approach to increasing the energy density of lithium-ion batteries (LIBs). Unfortunately, the corrosion of cathode aluminum (Al) current collector at high voltage limits the application of high-voltage LIBs. In this report, for the first time, MXene-Ti 3 C 2 T x nanosheets are proposed as an armored layer for Al current collector to conquer the corrosion under high operating voltage over 4.5 V versus Li + /Li. The MXene armored layer is fabricated via a self-assembly procedure, which exhibits ultra-thinness le...

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Succinonitrile as a high‐voltage additive in the electrolyte of LiNi_0.5Co_0.2Mn_0.3O₂/graphite full batteries

Cited by 30 publications

References 30 publications

Tetraethylthiophene‐2,5‐diylbismethylphosphonate: A Novel Electrolyte Additive for High‐Voltage Batteries

Tetraethylthiophene‐2,5‐diylbismethylphosphonate: A Novel Electrolyte Additive for High‐Voltage Batteries

Stabilizing Lithium Metal Batteries by Synergistic Effect of High Ionic Transfer Separator and Lithium–Boron Composite Material Anode

MXene‐Ti₃C₂ Armored Layer for Aluminum Current Collector Enable Stable High‐Voltage Lithium‐Ion Battery

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Succinonitrile as a high‐voltage additive in the electrolyte of LiNi0.5Co0.2Mn0.3O2/graphite full batteries

Cited by 30 publications

References 30 publications

Tetraethylthiophene‐2,5‐diylbismethylphosphonate: A Novel Electrolyte Additive for High‐Voltage Batteries

Tetraethylthiophene‐2,5‐diylbismethylphosphonate: A Novel Electrolyte Additive for High‐Voltage Batteries

Stabilizing Lithium Metal Batteries by Synergistic Effect of High Ionic Transfer Separator and Lithium–Boron Composite Material Anode

MXene‐Ti3C2 Armored Layer for Aluminum Current Collector Enable Stable High‐Voltage Lithium‐Ion Battery

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Product

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Succinonitrile as a high‐voltage additive in the electrolyte of LiNi_0.5Co_0.2Mn_0.3O₂/graphite full batteries

MXene‐Ti₃C₂ Armored Layer for Aluminum Current Collector Enable Stable High‐Voltage Lithium‐Ion Battery