Trimethylsilyl (trimethylsiloxy) acetate as a novel electrolyte additive for improvement of electrochemical performance of lithium-rich Li1.2Ni0.2Mn0.6O2 cathode in lithium-ion batteries

Zhuang, Yan; Du, Fanghui; Zhu, Lele; Cao, Haishang; Dai, Hui; Adkins, Jason; Zhou, Qun; Zheng, Junwei

doi:10.1016/j.electacta.2018.09.071

Cited by 22 publications

(11 citation statements)

References 42 publications

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“…XPS analyses of the recovered NCM811 cathodes also provided informative results that explained these behaviors Figure S4): the XPS patterns showed similar C 1s spectra for all NCM811 cathodes; however, the peak intensity associated with C F (291.0 eV, the from PVDF binder used in the NCM811 cathode preparation, not for surface coating) 40,41 was higher for the recovered PVDF-NCM-1 than for the nontreated NCM811, indicating that less electrolyte decomposition occurs in the PVDF-NCM-1. Similar behaviors were observed in the P 2p spectra: the peaks related to Li x PF y (137.3 eV) and Li x PO y F z (135.1 eV) (from electrolyte decomposition) 42,43 were less intense for the PVDF-NCM-1, in agreement with the C 1s spectra which meaning the surface stability was markedly enhanced.…”

Section: Resultssupporting

confidence: 79%

Surface‐Modified Ni‐Rich Layered Oxide Cathode Via Thermal Treatment of Poly(Vinylidene Fluoride) for Lithium‐Ion Batteries

Kang

Seong

et al. 2020

Bulletin Korean Chem Soc

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Combination of poly(vinylidene fluoride) (PVDF) with Ni-rich layered cathode material create artificial cathode-electrolyte interphases by thermal decomposition of PVDF and residual Li + species. The pressure of the cell cycled with PVDF-treated cathode materials is markedly decreased, since the thermal treatment with PVDF selectively reduces the amounts of Li + species. The cycling performance is improved compared to nontreated Ni-rich layered cathodes because the artificial cathode-electrolyte interphases effectively suppress the electrolyte decomposition as determined by systematic characterization of particle hardness, surface morphology, and electrochemical impedance spectroscopy. Additional high temperature storage tests performed with 3450-dimensioned pouch cells indicate much improved recovery rates, as well as smaller open circuit voltage drops, smaller increases in internal resistance, and less swelling for cells cycled with the PVDF-treated Ni-rich layered cathode than with a nontreated Ni-rich layered cathode.

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Section: Resultssupporting

confidence: 79%

Surface‐Modified Ni‐Rich Layered Oxide Cathode Via Thermal Treatment of Poly(Vinylidene Fluoride) for Lithium‐Ion Batteries

Kang

Seong

et al. 2020

Bulletin Korean Chem Soc

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“…There are many aspects that affect the cycling performances of LLO, including the increased interfacial impedance due to the accumulated products from electrolyte decomposition, the decreased discharge voltage plateau due to phase transformation from layered to spinel, and the structural destruction due to the attack from HF . Thanks to the high charge voltage (4.8 V), all of the cells deliver an initial capacity of as large as 250 mAh g –1 at 0.1C, which is highly dependent on the composition of LLO. − In the baseline electrolyte, the LLO behaves stable before 100 cycles, although minor capacity loss is observed. This initial capacity loss can be ascribed to the slow phase transformation that is inevitable for the samples enforced by doping, coating, or using electrolyte additives. , After the 130th cycle, however, the LLO cycled in the baseline electrolyte suffers a sudden capacity fading, which can be ascribed to the structural destruction. , In the BTMSC-containing electrolyte, the LLO behaves similar to that in the baseline electrolyte but is stable up to 200 cycles, highlighting the contribution of BTMSC.…”

Section: Results and Discussionmentioning

confidence: 99%

Stabilizing a High-Voltage Lithium-Rich Layered Oxide Cathode with a Novel Electrolyte Additive

Lan¹,

Zheng²,

Zhou³

et al. 2019

ACS Appl. Mater. Interfaces

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We report a novel electrolyte additive, bis(trimethylsilyl)carbodiimide, that effectively stabilizes high-voltage lithium-rich oxide cathode. Charge/discharge tests demonstrate that even trace amounts of bis(trimethylsilyl)carbodiimide in a baseline electrolyte improve the cycling stability of this cathode significantly, either in Li-based half cells or graphite-based full cells, where the capacity retention after 200 cycles between 2 and 4.8 V at 0.5C is enhanced from 40 to 72% and 49 to 77%, respectively. Analyses using physical characterization and theoretical calculations reveal that this additive not only builds a protective film on the cathode but also eliminates detrimental hydrogen fluoride via its strong coordination with hydrogen fluoride or protons.

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“…They indicated that silica particles form gel layer on the Al surface and this prevents the corrosive action of electrolyte. In the recent work by Zhuang et al 13 we found that the water impurity in the battery electrolyte was removal by adding trimethylsilyl (trimethylsiloxy) acetate . This leads to suppress the corrosion of battery electrodes and current collector.…”

Section: Introductionmentioning

confidence: 99%

Novel nanocomposites of Ni-Pc/polyaniline for the corrosion safety of the aluminum current collector in the Li-ion battery electrolyte

Deyab

Mele

Bloise

et al. 2021

Sci Rep

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In electrochemical energy storage systems, Li-ion batteries have drawn considerable interest. However, the corrosion of the aluminum current collector in the LiN(SO2CF3)2 electrolyte has a major effect on battery efficiency. To protect the current collector from the corrosive action of the LiN(SO2CF3)2 electrolyte, new nanocomposites based on Ni(II)tetrakis[4-(2,4-bis-(1,1-dimethyl-propyl)-phenoxy)]phthalocyanine (Ni-Pc) and polyaniline matrix (PANI) (i.e. PANI@Ni-Pc composites) are coated on the aluminum current. SEM, XRD, and EDS were used to characterize the PANI@Ni-Pc composite. This method represents a novel approach to the production of Li-ion batteries. Electrochemical tests show that the PANI@Ni-Pc composites can protect aluminum from corrosion in LiN(SO2CF3)2. The output of PANI@Ni-Pc composites is influenced by the Ni-Pc concentration. The composite PANI@Ni-Pc is a promising way forward to build high-stability Li-Ion batteries.

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Trimethylsilyl (trimethylsiloxy) acetate as a novel electrolyte additive for improvement of electrochemical performance of lithium-rich Li1.2Ni0.2Mn0.6O2 cathode in lithium-ion batteries

Cited by 22 publications

References 42 publications

Surface‐Modified Ni‐Rich Layered Oxide Cathode Via Thermal Treatment of Poly(Vinylidene Fluoride) for Lithium‐Ion Batteries

Surface‐Modified Ni‐Rich Layered Oxide Cathode Via Thermal Treatment of Poly(Vinylidene Fluoride) for Lithium‐Ion Batteries

Stabilizing a High-Voltage Lithium-Rich Layered Oxide Cathode with a Novel Electrolyte Additive

Novel nanocomposites of Ni-Pc/polyaniline for the corrosion safety of the aluminum current collector in the Li-ion battery electrolyte

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