A functional electrolyte containing propyl 4-methylbenzene sulfonate (PMBS) additive to improve the cycling performance of the LiNi0.8Co0.1Mn0.1O2/graphite full cell under the low temperature of −10 °C

Li, Haijia; Cai, Jian; Liao, Jianping; Li, Yiting; Zeng, Xueyi; He, Xin; Fan, Weizhen; Fan, Chaojun; Ma, Zhen; Nan, Junmin

doi:10.1039/d3ta04535h

Cited by 2 publications

(1 citation statement)

References 60 publications

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“…23 Different mechanisms of functioning can be categorized as HF scavengers (isocyanate groups (N� C�O), 24 silane derivatives (Si−O), 25,26 phosphates (P-(OR) 2 R), etc. 27 ), and film-forming additives (containing boron, 28 sulfur, 29 fluorine, 30 phosphorus, 31 and nitrogen elements, etc. 32 ).…”

Section: Introductionmentioning

confidence: 99%

Stable and Fast Ion Transport Electrolyte Interfaces Modified with Novel Fluorine- and Nitrogen-Containing Solvents for Ni-Rich Cathode Materials

Peng,

Shen,

et al. 2024

ACS Appl. Mater. Interfaces

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Ternary nickel-rich layered oxide LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811) is recognized as a cathode material with a promising future, attributed to its high energy density. However, the pulverization of cathode particles, structural collapse, and electrolyte decomposition are closely associated with the fragile cathode−electrolyte interphases (CEI), which seriously affect the electrochemical performances of ternary high-nickel materials. In this paper, fluorine-and nitrogen-containing methyl-2-nitro-4-(trifluoromethyl)benzoate (MNTB) was selected, which was synergistically regulated with fluoroethylene carbonate (FEC) to generate a robust CEI film. The preferential decomposition of MNTB/FEC results in the formation of an inorganic-rich (Li 3 N, LiF, and Li 2 O) CEI film with uniformly dense and stable characteristics, which is conducive to the migration of Li + and the stability of the NCM811 structure and enhances the cycling stability of the battery system. Simultaneously, MNTB effectively suppresses the adverse reaction associated with increased polarization caused by higher interface impedance due to conventional single FEC additives, further improving the rate capability of the battery. Moreover, MNTB/FEC can effectively eliminate HF, preventing its corrosion on the NCM811 cathode. Under the synergistic effect of MNTB/FEC, after 300 discharge cycles at a high cutoff voltage of 4.3 V and a current density of 1 C (2 mA cm −2 ), the discharge capacity of the NCM811||Li battery was 150.12 mA h g −1 with a capacity retention of 81.10%, while it was only 32.8% for the standard electrolyte (STD). The discharged capacity of the MNTB/FECcontaining battery was about 115.43 mA h g −1 at the high rate of 7 C, which was considerably higher than that of the STD (93.34 mA h g −1 ). In this study, the designed MNTB as a novel solvent synergistically regulated with FEC will contribute to the enhanced stability of NCM811 materials at high cutoff voltages and at the same time provide an effective modified strategy to enhance the stability of commercial electrodes.

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Section: Introductionmentioning

confidence: 99%

Stable and Fast Ion Transport Electrolyte Interfaces Modified with Novel Fluorine- and Nitrogen-Containing Solvents for Ni-Rich Cathode Materials

Peng,

Shen,

et al. 2024

ACS Appl. Mater. Interfaces

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Eliminating H2O/HF and regulating interphase with bifunctional tolylene-2, 4-diisocyanate (TDI) additive for long life Li-ion battery

Zeng,

Gao,

Zhou

et al. 2024

Journal of Energy Chemistry

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A functional electrolyte containing propyl 4-methylbenzene sulfonate (PMBS) additive to improve the cycling performance of the LiNi_0.8Co_0.1Mn_0.1O₂/graphite full cell under the low temperature of −10 °C

Abstract: A functional electrolyte containing propyl 4-methylbenzenesulfonate (PMBS) additive is developed to improve the performance of the LiNi0.8Co0.1Mn0.1O2 (NCM811)/graphite pouch full cells, especially the cycling lifetime under low temperature.

Cited by 2 publications

References 60 publications

Stable and Fast Ion Transport Electrolyte Interfaces Modified with Novel Fluorine- and Nitrogen-Containing Solvents for Ni-Rich Cathode Materials

Stable and Fast Ion Transport Electrolyte Interfaces Modified with Novel Fluorine- and Nitrogen-Containing Solvents for Ni-Rich Cathode Materials

Eliminating H2O/HF and regulating interphase with bifunctional tolylene-2, 4-diisocyanate (TDI) additive for long life Li-ion battery

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