Tailored interface composition improves the integrity of electrode/electrolyte interphases for high-voltage Ni-rich lithium metal batteries in a sulfolane-based electrolyte

Deng, Xiaodie; Li, Jialin; Lai, P.T.; Kuang, Silan; Liu, Jiaxiang; Dai, Pengpeng; Hua, Haiming; Dong, Peng; Zhang, Yingjie; Yang, Yang; Zhao, Jinbao

doi:10.1016/j.cej.2023.142907

Cited by 5 publications

(1 citation statement)

References 56 publications

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“…With the rapid development of the world economy, the human demand for non-renewable fossil fuels such as coal and oil is increasing [1,2]. To reduce carbon emissions, it is urgent to find and develop low-pollution renewable energy sources [3]. Consequently, various portable electronic devices and new energy trams are booming, and lithium-ion batteries (LIBs) have become indispensable energy storage devices [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

Ionic liquid-mediated PEO-based solid-state electrolyte membrane modified with Dawson-type polyoxometalates

Liu,

Cui,

Zhu

et al. 2023

Polyoxometalates

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All-solid-state batteries are promising candidates for the future generation of energy storage materials. An ideal solid-state electrolyte should have the advantages of excellent compatibility with electrodes and decent ionic conductivity. Nevertheless, the inherent low ionic conductivity of polyethylene oxide (PEO)-based electrolytes leads to low capacity, which significantly limits their wide commercial application. In this study, Dawson-type Li 6 P 2 Mo 18 O 62 (LPM) or Li 6 P 2 W 18 O 62 (LPW) was selected as lithium salt, combined with ionic liquids (ILs) with ether oxygen chains, and incorporated into a polymer matrix blended with PEO and polyvinylidene fluoride as fillers. A polymer electrolyte film with a smooth surface and uniform filler distribution was prepared using a mechanical co-blending method. The challenge of polyoxometalates as ion-conducting materials is attributed to the strong binding ability of their anion clusters to cations. One prominent benefit of this study is that the dissociation of Li + from LPM or LPW is facilitated by ILs and relies on the ether oxygen chains in ILs for transport, yielding composites with favorable conduction properties. This study demonstrates the vast potential of polyoxometalates in the field of ionic conductivity.

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Section: Introductionmentioning

confidence: 99%

Ionic liquid-mediated PEO-based solid-state electrolyte membrane modified with Dawson-type polyoxometalates

Liu,

Cui,

Zhu

et al. 2023

Polyoxometalates

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Understanding and Design of Cathode–Electrolyte Interphase in High‐Voltage Lithium–Metal Batteries

Li,

He,

Jie

et al. 2024

Adv Funct Materials

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The development of lithium–metal batteries (LMBs) has emerged as a mainstream approach for achieving high‐energy‐density energy storage devices. The stability of electrochemical interfaces plays an essential role in realizing stable and long‐life LMBs. Despite extensive and comprehensive research on the lithium anode interface, there is limited focus on the cathode interface, particularly regarding high‐voltage transition metal oxide cathode materials. In this review, the challenges associated with developing stable high‐voltage cathode materials are first discussed. Characterization techniques for understanding the composition and structure of the cathode–electrolyte interphase (CEI) are then introduced. Subsequently, recent developments in electrolyte design and interface modification for constructing a stable CEI are summarized. Finally, perspectives on future research trends for understanding and developing the high‐voltage CEI are discussed. This review can offer valuable guidance for understanding and designing the high‐voltage CEI, pushing forward the development of high‐energy‐density LMBs.

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Localized High‐Concentration Sulfone Electrolytes with High‐Voltage Stability and Flame Retardancy for Ni‐Rich Lithium Metal Batteries

Zhang,

Chen,

Hou

et al. 2024

Small

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The localized high‐concentration electrolyte (LHCE) propels the advanced high‐voltage battery system. Sulfone‐based LHCE is a transformative direction compatible with high energy density and high safety. In this work, the application of lithium bis(trifluoromethanesulphonyl)imide and lithium bis(fluorosulfonyl)imide (LiFSI) in the LHCE system constructed from sulfolane and 1,1,2,2‐tetrafluoroethyl‐2,2,3,3‐tetrafluoropropyl ether (TTE) is investigated. The addition of diluent causes an increase of contact ion pairs and ionic aggregates in the solvation cluster and an acceptable quantity of free solvent molecules. A small amount of LiFSI as an additive can synergistically decompose with TTE on the cathode and participate in the construction of both electrode interfaces. The designed electrolyte helps the Ni‐rich system to cycle firmly at a high voltage of 4.5 V. Even with high mass load and lean electrolyte, it can keep a reversible specific capacity of 91.5% after 50 cycles. The constructed sulfone‐based electrolyte system exhibits excellent thermal stability far beyond the commercial electrolytes. Further exploration of in‐situ gelation has led to a quick conversion of the designed liquid electrolyte to the gel state, accompanied by preserved stability, which provides a direction for the synergistic development of LHCE with gel electrolytes.

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Tailored interface composition improves the integrity of electrode/electrolyte interphases for high-voltage Ni-rich lithium metal batteries in a sulfolane-based electrolyte

Cited by 5 publications

References 56 publications

Ionic liquid-mediated PEO-based solid-state electrolyte membrane modified with Dawson-type polyoxometalates

Ionic liquid-mediated PEO-based solid-state electrolyte membrane modified with Dawson-type polyoxometalates

Understanding and Design of Cathode–Electrolyte Interphase in High‐Voltage Lithium–Metal Batteries

Localized High‐Concentration Sulfone Electrolytes with High‐Voltage Stability and Flame Retardancy for Ni‐Rich Lithium Metal Batteries

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