Molecularly engineered linear organic carbonates as practically viable nonflammable electrolytes for safe Li-ion batteries

Lee, Jina; Jeon, A-Re; Lee, Hye Jin; Shin, Unbeom; Yoo, Yiseul; Lim, Hee‐Dae; Han, Ching-Chih; Lee, Hochun; Kim, Yong Jin; Baek, Jayeon; Seo, Dong‐Hwa; Lee, Min Ah

doi:10.1039/d3ee00157a

Cited by 16 publications

(15 citation statements)

References 48 publications

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“…Additionally, long-chain ether solvents have substantially higher boiling points, which effectively delays evaporation and prevents the build-up of internal pressure, ultimately enhancing the thermal stability of batteries. 33 It is important to mention that DMC and DEC, which are extensively utilized in carbonate-based electrolytes, have flash points of 17 and 25 °C, respectively. It suggests that long-chain ether-based electrolytes exhibit substantially greater thermal stability than electrolytes based on carbonates.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Tuning the End Alkyl Chain of the Ether Solvent to Stabilize the Electrode/Electrolyte Interfaces in the NCM-Li Battery

Li,

Chen,

et al. 2024

ACS Appl. Mater. Interfaces

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Lithium metal batteries (LMBs) combined with a high-voltage nickel-rich cathode show great potential in meeting the growing need for high energy density. The lack of advanced electrolytes has been a major obstacle in the commercialization of high-voltage lithium metal batteries (LMBs), as these electrolytes need to effectively support both a stable lithium metal anode (LMA) and a high-voltage cathode (>4 V vs Li+/Li). In this work, by extending the two terminal methyl groups in DIGDME and TEGDME to n-butyl groups, we design a new weakly solvating electrolyte (2 M LIFSI+TEGDBE) that enables the stable cycling of NMC83 (LiNi0.83Co0.12Mn0.05O2) cathodes. The NMC83 cell exhibits a high and stable Coulombic efficiency (CE) of over 99%, as well as capacity retention of approximately 99.8% after 100 cycles at 0.3 C. X-ray photoelectron spectroscopy analysis (XPS) and high-resolution transmission electron microscope (HRTEM) images revealed that the anion species decomposed first, resulting in the formation of a cathode–electrolyte interface (CEI) film predominantly consisting of decomposition products from the anions on the positive electrode surface. This work links the functional group of solvents with the solvation structure and electrochemical performance of ether-based electrolytes, providing a distinctive sight to design advanced electrolytes for high-energy-density LMBs.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Tuning the End Alkyl Chain of the Ether Solvent to Stabilize the Electrode/Electrolyte Interfaces in the NCM-Li Battery

Li,

Chen,

et al. 2024

ACS Appl. Mater. Interfaces

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“…Dialkyl carbonates (DACs) possess significant importance in the chemical industry, including polymer, pharmaceutical, and green solvent sectors. − In particular, DACs have found increasing applications as solvents of electrolytes in secondary Li-ion batteries. − Therefore, considerable effort is underway to explore methods for producing DACs. − Conventionally, the phosgene process has been preferred for industrial-scale DAC production due to its cost-effectiveness and simplicity despite the inherent hazards associated with phosgene gas. , In the 1980s, EniChem S.p.A, as a leading company, successfully commercialized a nonphosgene process for dimethyl carbonate (DMC) production using copper halide-based catalysts in the oxidative carbonylation of methanol. , Nevertheless, these catalysts carry some limitations, including reactor corrosion and low yield. Cobalt catalysts were studied as halide-free catalysts, but they demonstrated low catalytic activity [15.7% yield of diethyl carbonate (DEC)] and underwent deactivation …”

Section: Introductionmentioning

confidence: 99%

Unveiling the Role of DMAP for the Se-Catalyzed Oxidative Carbonylation of Alcohols: A Mechanism Study

Lee,

Jang,

Kim

et al. 2024

ACS Omega

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Considering the remarkable catalytic activity (160 times higher) of Se/DMAP for the oxidative carbonylation of alcohols, unveiling the role of DMAP in catalysis is highly required. We investigated DFT calculations, and the proposed intermediates were verified with in situ ATR-FTIR analysis. DFT showed that the formation of [DMAP···HSe]δ−[DMAP(CO)OR]δ+ (IV) via nucleophilic substitution of DMAP at the carbonyl group of DMAP···HSe(CO)OR is the most energetically favorable. DMAP acts as both a nucleophile and a hydrogen bond acceptor, which is responsible for its remarkable activity.

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“…[7][8][9] However, the deployment of lithium-ion batteries with nonaqueous electrolytes still faces challenges, including the flammability characteristics and inherent toxicity of organic electrolytes, as well as increased economic costs. 10,11 Consequently, there is a pressing demand for more affordable and safer secondary batteries. 12 At present, multivalent metal ion batteries have been reported, [13][14][15] in which aqueous zinc-ion batteries (AZIBs) offer substantial capacity, good stability, superior safety, and cost effectiveness.…”

Section: Introductionmentioning

confidence: 99%

Functionalization design of zinc anode for advanced aqueous zinc‐ion batteries

Feng,

Fan

et al. 2024

SusMat

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Rechargeable aqueous zinc‐ion batteries (AZIBs) offer high energy density, low cost, and are environmentally friendly, rendering them potential energy storage devices. However, dendrite growth on the zinc anode and numerous side reactions during operation challenge their commercialization. Recent advancements have introduced various materials for the functionalization of zinc anodes. These developments effectively mitigate the performance degradation of zinc anode, enhancing both its cycle stability and the overall performance of AZIBs. Herein, the construction of functionalized zinc anodes is discussed, current materials (including organic, inorganic and their composites) for modified zinc anodes are categorized, and the protective mechanism behind functionalized zinc anodes is analyzed. The study concludes by outlining the characteristics of materials suitable for dendritic‐free zinc anode construction and the prospects for future development directions of functionalized zinc anodes in AZIBs.

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Molecularly engineered linear organic carbonates as practically viable nonflammable electrolytes for safe Li-ion batteries

Abstract: Fire and explosion hazards represent a major barrier to the widespread adoption of lithium-ion batteries (LIBs) in electric vehicles and energy storage systems. Although mitigating the flammability of linear organic...

Cited by 16 publications

References 48 publications

Tuning the End Alkyl Chain of the Ether Solvent to Stabilize the Electrode/Electrolyte Interfaces in the NCM-Li Battery

Tuning the End Alkyl Chain of the Ether Solvent to Stabilize the Electrode/Electrolyte Interfaces in the NCM-Li Battery

Unveiling the Role of DMAP for the Se-Catalyzed Oxidative Carbonylation of Alcohols: A Mechanism Study

Functionalization design of zinc anode for advanced aqueous zinc‐ion batteries

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