Boosting lithium batteries under harsh operating conditions by a resilient ionogel with liquid-like ionic conductivity

Yu, Le; Liu, Qing; Wang, Yunlong; Guo, Song; Hu, Qiaomei; Li, Yaqian; Lan, Xiwei; Liu, Zhifang; Hu, Xianluo

doi:10.1016/j.jechem.2021.03.042

Cited by 15 publications

(9 citation statements)

References 43 publications

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“…As expected, the as-fabricated monolithic IGEM exhibits superior comprehensive performance in six key indicators compared to reported ionogel electrolytes (Figure 1b; and Table S1, Supporting Information). [21][22][23][24][25][26] Our study reveals that positively…”

mentioning

confidence: 57%

“…As expected, the as‐fabricated monolithic IGEM exhibits superior comprehensive performance in six key indicators compared to reported ionogel electrolytes (Figure 1b; and Table S1, Supporting Information). [ 21–26 ] Our study reveals that positively charged PIL and functional groups with strong electronegativity on PTFEMA concurrently contribute to a fast structural Li + transport mode by regulating the Li + environment within the IGEM. Furthermore, practical improvements based on the as‐fabricated IGEM are verified by the outstanding rate performance and cyclability of Li||Li symmetric cells and Li||LiFePO 4 full cells in a wide temperature range from 0 to 90 °C.…”

Section: Introductionmentioning

confidence: 88%

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Monolithic Task‐Specific Ionogel Electrolyte Membrane Enables High‐Performance Solid‐State Lithium‐Metal Batteries in Wide Temperature Range

Liu

Tao

et al. 2021

Adv Funct Materials

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Monolithic ionogel electrolyte membranes (IGEMs) based on gelling scaffolds and ionic liquids have aroused intensive interest because of their broad processing compatibility, nonflammability, and favorable thermal and electrochemical features. However, the absence of functional scaffolds that concurrently enable high mechanical strength and Li+ transportability of IGEMs constrains the battery power and safety. Herein, a task‐specific IGEM monolith featuring high Li+ conductivity and outstanding thermal stability is demonstrated, whereby electrospun positively charged poly(ionic liquid) nanofibers serve as a thermotolerant scaffold for the IGEM. Regulating the Li+ environment in the IGEM enables the shift from the sluggish vehicular to fast structural Li‐ion transport mode. With the unique IGEM, the solid‐state Li||LiFePO4 cells achieve improved rate capability and good cyclability in a wide temperature range from 0 to 90 °C. Furthermore, practical solid‐state Li||LiFePO4 pouch cells with a cathode capacity of ≈2 mAh cm−2 have also been demonstrated.

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confidence: 57%

Section: Introductionmentioning

confidence: 88%

Monolithic Task‐Specific Ionogel Electrolyte Membrane Enables High‐Performance Solid‐State Lithium‐Metal Batteries in Wide Temperature Range

Liu

Tao

et al. 2021

Adv Funct Materials

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“…In recent years, organic-inorganic composite electrolytes have attracted extensive attention owing to their excellent comprehensive properties. 104,105 Studies have evidenced that adding inorganic fillers to PEs can improve the electrochemical performance of the system, particularly the ionic conductivity. The ESW of composite electrolytes tends to be wider than that of pure PEs, but few studies have explored this mechanism.…”

Section: Hydrogen-bond Interactionmentioning

confidence: 99%

Challenges of polymer electrolyte with wide electrochemical window for high energy solid‐state lithium batteries

Huo

Sheng

Xue

et al. 2023

InfoMat

114

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With the rapid development of energy storage technology, solid‐state lithium batteries with high energy density, power density, and safety are considered as the ideal choice for the next generation of energy storage devices. Solid electrolytes have attracted considerable attention as key components of solid‐state batteries. Compared with inorganic solid electrolytes, solid polymer electrolytes have better flexibility, machinability, and more importantly, better contact with the electrode, and low interfacial impedance. However, its low ionic conductivity, narrow electrochemical stability window (ESW), and poor mechanical properties at room temperature limit its development and practical applications. In recent years, many studies have focused on improving the ionic conductivity of polymer electrolytes; however, few systematic studies and reviews have been conducted on their ESWs. A polymer electrolyte with wide electrochemical window will aid battery operation at a high voltage, which can effectively improve their energy density. Moreover, their stability toward lithium metal anode is also important. Therefore, this review summarizes the recent progress of solid polymer electrolytes on the ESW, discusses the factors affecting ESW of polymer electrolytes, and analyzes a strategy to broaden the window from the perspective of molecular interaction, polymer structural design, and interfacial tuning. The development trends of polymer electrolytes with wide electrochemical windows are also presented.

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“…Ionogel membrane electrolytes that possess solid‐like characteristics such as leak‐proof, structural flexibility, and mechanical robustness can give the assembled batteries extra safety and stability whenever coming across a sudden accident. [ 101 ] In another example of interpenetrating network ionogel of PVDF‐HFP and methoxy polyethylene glycol acrylate (MPEGA) by the ethoxylated trimethylolpropane triacrylate (ETPTA), Li and co‐workers achieved an excellent ionic conductivity of 1.19 mS cm −1 at ambient temperature combined with the robust mechanical strength of 1.55 MPa at the breaking elongation 259%. Based on this electrolyte, the assembled lithium‐metal pouch cell could work normally while enduring the conditions of bending, folding, and even shearing abuse (Figure 8e).…”

Section: Advantageous Properties Of Ionogel Membrane Electrolytes And...mentioning

confidence: 99%

Ionogel‐Based Membranes for Safe Lithium/Sodium Batteries

Wang

Jiang

2022

Advanced Materials

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Alkali (lithium, sodium)‐based second batteries are considered one of the brightest candidates for energy‐storage applications in order to utilize the random and intermittent renewable energy to achieve carbon neutrality. Conventional lithium/sodium batteries containing liquid organic electrolytes are vulnerable to electrolytes leakage and even combustion, which hinders their large‐scale and reliable application. All‐solid‐state electrolytes which are considered to have better safety have been developed in recent years. However, most of them suffer from low ionic conductivity and large interfacial resistance with the electrode. Ionogel‐electrolyte membranes composed of ionic liquids and solid matrices, have attracted much attention because of their nonvolatility, nonflammability, and superior chemical and electrochemical properties. This review focuses on the most recent advances of ionogel electrolytes that sprang up with the emerging demand and progress of safe lithium/sodium batteries. The ionogel‐electrolyte membranes are discussed based on the framework components and preparation methods. Their structure and properties, including ionic conductivity, mechanical strength, electrochemical stabilities, and so on, are demonstrated in combination with their applications. The current challenges and insights on the future development of ionogel electrolytes for advanced safe lithium/sodium batteries are also proposed.

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Boosting lithium batteries under harsh operating conditions by a resilient ionogel with liquid-like ionic conductivity

Cited by 15 publications

References 43 publications

Monolithic Task‐Specific Ionogel Electrolyte Membrane Enables High‐Performance Solid‐State Lithium‐Metal Batteries in Wide Temperature Range

Monolithic Task‐Specific Ionogel Electrolyte Membrane Enables High‐Performance Solid‐State Lithium‐Metal Batteries in Wide Temperature Range

Challenges of polymer electrolyte with wide electrochemical window for high energy solid‐state lithium batteries

Ionogel‐Based Membranes for Safe Lithium/Sodium Batteries

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