In-situ formation of quasi-solid polymer electrolyte for improved lithium metal battery performances at low temperatures

Ren, Wenhao; Zhang, Yafang; Lv, Ruixin; Guo, Shiyuan; Wu, Wenjia; Liu, Yong; Wang, Jingtao

doi:10.1016/j.jpowsour.2022.231773

Cited by 27 publications

(20 citation statements)

References 50 publications

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“…The assembled Li/LiFePO 4 battery has excellent electrochemical stability at 0 °C and −20 °C. 146 Chen Wang proposed an LiFePO 4 in situ polymerized solid electrolyte based on deep eutectic solvent (DES). The polymer conversion is 99.8%, which eliminates the residue of monomers in the battery and improves the solid–solid interface.…”

Section: Methods To Reduce the Working Temperature Of Ssesmentioning

confidence: 99%

Recent advances in designing solid-state electrolytes to reduce the working temperature of lithium batteries

Yao,

Wang,

Wan

et al. 2023

Mater. Chem. Front.

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Section: Methods To Reduce the Working Temperature Of Ssesmentioning

confidence: 99%

Recent advances in designing solid-state electrolytes to reduce the working temperature of lithium batteries

Yao,

Wang,

Wan

et al. 2023

Mater. Chem. Front.

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“…In our previous work, QSPE was prepared by in situ polymerization of DOL (PDOL) on a commercial polypropylene (PP) separator using fluoroethylene carbonate as plasticizer. Then, a low interfacial resistance of 68.3 Ω and a high ionic conductivity of 9.8 × 10 –4 S cm –1 at 0 °C were obtained . However, it was found that there were defects at the interface between PP and PDOL because of poor compatibility.…”

Section: Introductionmentioning

confidence: 99%

“…Then, a low interfacial resistance of 68.3 Ω and a high ionic conductivity of 9.8 × 10 −4 S cm −1 at 0 °C were obtained. 27 However, it was found that there were defects at the interface between PP and PDOL because of poor compatibility. Recently, the electrospinning technique has been widely used in fabricating nanofibers with a highly interconnected pore structure and large surface area, which could confer ample and adjustable interface interactions between nanofiber and liquid electrolyte.…”

Section: Introductionmentioning

confidence: 99%

The Fabrication of in Situ Polymerization of 1,3-Dioxlane/Poly(vinyl alcohol)/Polyethylenimine Quasi-Solid Polymer Electrolyte for a Lithium Metal Battery Operated at Low Temperatures

et al. 2023

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The development of a high-performance electrolyte that can work at low temperatures is critical for expanding the application of lithium metal batteries. However, most of the present electrolytes suffer from low ionic conductivity and poor interface contact at low temperatures. Herein, an ∼21 μm-thick quasi-solid polymer electrolyte is prepared by in situ polymerization of 1,3-dioxlane (PDOL) within the poly(vinyl alcohol)/ polyethylenimine (PVA/PEI) nanofiber skeleton that contains −NH− groups. The generated hydrogen bond interactions between PDOL and PVA/PEI nanofiber, together with the inherently strong mechanical strength of the nanofiber, confer quasi-solid polymer electrolyte (QSE@PVA/PEI) the tensile strength of 12.1 MPa. Meanwhile, the interactions also interfere with the chain arrangement of PDOL and efficiently enhance the chain mobility, giving QSE@PVA/PEI a remarkable ionic conductivity of 3.29 × 10 −5 S cm −1 and a high Li + transference number of 0.437 at −60 °C. As a result, the Li/QSE@PVA/PEI/Li cell can operate over 1500 h without obvious polarization at 0.2 mA cm −2 and −20 °C. Moreover, the NCM523/QSE@PVA/PEI/ Li cell can stably cycle at −20 °C, delivering a high discharge capacity of 106.7 mAh g −1 over 600 cycles at 0.2 C, which outperforms most reported electrolytes. Even at −40 °C, a modest discharge capacity of 75.2 mAh g −1 is obtained at 0.2 C.

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“…27 In situ preparation of GPEs can avoid the use of organic solvents, improve the interfacial contact between the electrolyte and electrodes, and reduce the interfacial charge transference resistance through injection of the precursor into the LMB cell before the polymerization occurs. 28,29 However, the nonelectrolytic catalysts and corresponding side reactions are harmful for the electrochemical performance of the LMBs. 17,30 It has been reported that lithium salts could act as the catalyst of radical polymerizations or the initiator of cationic polymerizations, 30,31 thus avoiding the abovementioned issues and providing an effective approach to in situ prepare GPEs.…”

mentioning

confidence: 99%

“…Gel polymer electrolytes (GPEs) have received extensive attention in recent years because of their combination of high safety of solid polymer electrolytes (SPEs) and excellent electrochemical performance of LEs. − However, GPEs are usually obtained by mixing small molecule plasticizers with the polymer matrix dissolved in large amounts of organic solvents, which can easily cause environmental pollution , However, the nonelectrolytic catalysts and corresponding side reactions are harmful for the electrochemical performance of the LMBs. , It has been reported that lithium salts could act as the catalyst of radical polymerizations or the initiator of cationic polymerizations, , thus avoiding the abovementioned issues and providing an effective approach to in situ prepare GPEs …”

mentioning

confidence: 99%

Facile Fabrication of Polymer Electrolytes with Branched Structure via Deep Eutectic Electrolyte-Enabled In Situ Polymerizations

Wang,

Zhang,

et al. 2024

ACS Macro Lett.

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The demand for higher energy density in energy storage devices drives further research on lithium metal batteries (LMBs) because of the high theoretical capacity and low voltage of lithium metal anode. Polymer electrolytes (PEs) exhibit obvious advantages in combating volatilization and leakage compared with liquid electrolytes, which improves the safety of LMBs. However, it is still difficult to construct PEs with a stable electrolyte−electrode interface for high-performance and long-term life LMBs. Herein, the gel polymer electrolyte (GPE-SL) containing deep eutectic electrolyte (DEE) and branchlike polymer skeleton are designed and prepared by the DEE-induced in situ cationic and radical polymerizations. The DEE provides a smooth Li + migration pathway to ensure the electrochemical properties, and the multibrominated polymer matrix formed in situ enables a LiBr-rich solid electrolyte interphase (SEI) layer on lithium metal anode and prolongs the life span of LMBs. Hence, the Li|GPE-SL|LiFePO 4 battery displays an excellent cycling stability with 84% capacity retention after 1200 cycles at 1C. This simple deep eutectic electrolyte-induced polymerization method provides a promising direction for high-performance LMBs with improved anode−electrolyte compatibility through the construction of a stable SEI layer in situ.

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In-situ formation of quasi-solid polymer electrolyte for improved lithium metal battery performances at low temperatures

Cited by 27 publications

References 50 publications

Recent advances in designing solid-state electrolytes to reduce the working temperature of lithium batteries

Recent advances in designing solid-state electrolytes to reduce the working temperature of lithium batteries

The Fabrication of in Situ Polymerization of 1,3-Dioxlane/Poly(vinyl alcohol)/Polyethylenimine Quasi-Solid Polymer Electrolyte for a Lithium Metal Battery Operated at Low Temperatures

Facile Fabrication of Polymer Electrolytes with Branched Structure via Deep Eutectic Electrolyte-Enabled In Situ Polymerizations

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