A self-standing, UV-cured semi-interpenetrating polymer network reinforced composite gel electrolytes for dendrite-suppressing lithium ion batteries

Liu, Ruiping; Wu, Zirui; He, Peng; Fan, Haoyu; Huang, Zeya; Zhang, Lei; Chang, Xinshuang; Liu, Huan; Wang, Chang‐An; Li, Yutao

doi:10.1016/j.jmat.2018.12.006

Cited by 47 publications

(43 citation statements)

References 26 publications

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“…The presence of pores signifies the ion‐conductive channels, which enhance the migration of lithium ions and improve ionic conductivity. [ 20,32 ] Above all, the critical point is the transference number ( t + ), which is the fraction of the total current carried by lithium ions. In this study, it is measured using the Bruce–Vincent method, as shown in Figure 4d.…”

Section: Resultsmentioning

confidence: 99%

“…[ 13,48 ] It is worth mentioning that the designed U‐CPCE can affect and suppress dendrite growth. The reason for this effectiveness is first due to the durable mechanical properties of the U‐CPCE, [ 14,20,37 ] and the second is the tuning of the lithium ion distribution by the MMT. [ 48 ] The MMT introduced in this system has an ionic self‐concentration property that helps to maintain a high concentration of lithium ions at the electrolyte/electrode interface by optimizing the distribution of the lithium ions, so that it enables uniform lithium deposition on lithium metal with dendrite free.…”

Section: Resultsmentioning

confidence: 99%

“…[ 12,13 ] In particular, GPEs prepared by the UV (ultraviolet)‐curing method have been employed to induce cross‐linking of polymer matrixes. [ 14–20 ]…”

Section: Introductionmentioning

confidence: 99%

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Polymer‐Clay Nanocomposite Solid‐State Electrolyte with Selective Cation Transport Boosting and Retarded Lithium Dendrite Formation

Jeon

Kim

Lee

et al. 2020

Advanced Energy Materials

131

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possess safety issues, such as thermal runaway and have limitations in numerous cell designs due to their liquid organic solvent. [5,6] To resolve these concerns, solidstate electrolytes are being considered as an alternative for combustible liquid electrolytes because they provide not only good thermal stability and safety from solution leakage but also the possibility to use Li metal anodes with a promising high capacity. [7-11] However, the prerequisite is minimal cell performance and mechanical strength at ambient temperatures. Therefore, achieving ionic conductivity comparable to that of liquid electrolytes is a key feature for the success of solid electrolytebased LIBs. Gel polymer electrolytes (GPEs) are regarded as promising substitutes for liquid electrolytes due to their excellent ionic conductivity, effective encapsulation of organic solvents in cells, good interfacial adhesion to electrodes, high flexibility, and light weight. [8,10,12] However, GPEs have a limited mechanical strength because the organic liquid electrolyte is confined in a small fraction of the polymer network. Cross-linking of linear polymer or oligomer chains is one of the facile and effective ways to enhance the mechanical toughness of GPEs while maintaining their ionic conductivity. [12,13] In particular, GPEs prepared by the UV (ultraviolet)-curing method have been employed to induce cross-linking of polymer matrixes. [14-20] Inherently, the ionic conductivity of solid electrolytes, including GPEs, is inversely proportional to their mechanical properties because high liquid contents that improve the ionic conductivity soften the solid electrolyte. To solve this problem, composite gel polymer electrolytes (CGPEs), which are organic polymers mixed with inorganic fillers, have been extensively researched and found to improve the ionic conductivity and enhance the stability of polymer electrolytes. [7,21-23] Montmorillonite (MMT), a well-known group of smectite clays that are 2:1 type phyllosilicates composed of octahedral sheets sandwiched between two silica tetrahedral sheets, is an attractive and nextgeneration inorganic filler. [22,23] This is because they are not only abundant in the crust of the Earth but also sustainable and procurable materials that can be continuously generated by weathering. [22,24-26] In addition, they are dielectric materials with a high aspect ratio and large interfacial area that can Commercialized lithium-ion batteries (LIBs) with a liquid electrolyte have a high potential for combustion or explosion. The use of solid electrolytes in LIBs is a promising way to overcome the drawbacks of conventional liquid electrolyte-based systems, but they generally have a lower ionic conductivity and lithium ion mobility. Here, a UV-crosslinked composite polymer-clay electrolyte (U-CPCE) that is composed of a durable semi-interpenetrating polymer network (semi-IPN) ion transportive matrix (ETPTA/PVdF-HFP) and 2D ultrathin clay nanosheets that are fabricated by a one-step in situ UV curing method, are reported. The U-...

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Polymer‐Clay Nanocomposite Solid‐State Electrolyte with Selective Cation Transport Boosting and Retarded Lithium Dendrite Formation

Jeon

Kim

Lee

et al. 2020

Advanced Energy Materials

131

View full text Add to dashboard Cite

show abstract

“…1,2 In addition, it suffers from volume expansion during cycle performance, which can also weaken the cycle performance. [4][5][6] In recent years, much effort has been devoted to suppressing the lithium dendrite formation. [7][8][9] A native solid electrolyte interface (SEI) layer between the liquid electrolyte and the lithium metal can spontaneously shape up due to the high reactivity of the electrolyte solvent, such as cyclic carbonate (e.g., ethylene carbonate, EC) and cyclic ether (e.g., 1,3-dioxolane, DOL).…”

Section: Introductionmentioning

confidence: 99%

“…But the native SEI layer exhibits low ionic conductivity (4.2 Â 10 À8 S cm À1 ), 10 structural instability and chemical heterogeneity, 11 which induce heterogeneous electrodeposition resulting in dendrite growth. Many studies have disclosed various measures such as use of solid electrolytes or gel electrolytes, 4,8,[12][13][14][15][16] construction of an artificial solid electrolyte interface (SEI) layer, [17][18][19][20][21][22][23]54 design of functionalized separators, [24][25][26][27][28][29][30] and improvement of the structure of current collectors 2,[31][32][33][34][35][36][37] to suppress the formation and growth of lithium dendrites. Construction of an artificial SEI layer is one good solution to solve the challenge of suppressing the formation and growth of lithium dendrites.…”

Section: Introductionmentioning

confidence: 99%