Highly Conductive and Thermally Stable Ion Gels with Tunable Anisotropy and Modulus

Wang, Ying; Chen, Ying; Gao, Junkai; Yoon, Hyung‐Suk; Jin, Liyu; Forsyth, Maria; Dingemans, Theo J.; Madsen, Louis A.

doi:10.1002/adma.201505183

Cited by 72 publications

(114 citation statements)

References 59 publications

Supporting

Mentioning

113

Contrasting

Order By: Relevance

“…The modulus of hPEM•R changes from 1.32 GPa to 153 MPa from 20 to 40 wt%. The wide range of observed moduli suggests the tunability of our system in mechanical properties and a key factor for battery applications …”

Section: Resultsmentioning

confidence: 97%

“…To this end, block copolymers[3c,5] offer an elegant solution. More recently, mechanical blockades, such as 2D graphene oxide and 1D nanofillers, crosslinked networks, polymerization‐induced phase separation, and liquid crystal‐containing ion gel have been demonstrated as viable candidates for next generation PEM design. While initial results for all these methods have been promising, each of these candidates brings different obstacles, and much work remains in understanding the underlying mechanisms of dendrite growth and cell failure and optimizing the materials to meet the required combination of properties.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Nanostructured, Highly Anisotropic, and Mechanically Robust Polymer Electrolyte Membranes via Holographic Polymerization

Smith

Pan

Cheng

et al. 2017

Adv Materials Inter

View full text Add to dashboard Cite

to replace flammable liquid electrolytes, much research focus has been devoted to solid polymer electrolytes (SPEs) with combined high modulus and ionic conductivity in order to inhibit or retard Li dendrite growth. [3] For example, polyethylene oxide (PEO) has been blended with lithium salt to form SPEs since it has a low T g , high dielectric constant, and complexes well with Li ions. [4] Most SPEs to date have a few orders of magnitude lower conductivity than liquid-based electrolytes; to account for this, many attempts have been made to increase the conductivity while maintaining mechanical properties; however, SPE-based polymer electrolyte membranes (PEMs) typically lack the adequate combination of ionic conductivity and mechanical properties desired for long term or fast cycling in lithium batteries. The main solution for this has been to decouple the bulk electrolyte membrane mechanical and ion transport properties. To this end, block copolymers [3c,5] offer an elegant solution. More recently, mechanical blockades, such as 2D graphene oxide [6] and 1D nanofillers, [7] crosslinked networks, [8] polymerization-induced phase separation, [9] and liquid crystal-containing ion gel [10] have been demonstrated as viable candidates for next generation PEM design. While initial results for all these methods have been promising, each of these candidates brings different obstacles, and much work remains in understanding the underlying mechanisms of dendrite growth and cell failure and optimizing the materials to meet the required combination of properties.This paper reports a series of nanostructured, holographically polymerized PEMs (hPEMs) comprised of poly(ethylene glycol)/bis(trifluoromethane)sulfonimide lithium (PEG/ LiTFSI) electrolyte and acrylate-thiol-ene crosslinked resin. In holographical polymerization (HP), [11] a photopolymerizable monomer(s) is mixed with a photoinert material to form a homogenous mixture. [12] This prepolymer mixture is exposed to an interference pattern, inducing polymerization in the areas of constructive interference, which then leads to a concentration gradient, driving more monomer into the polymerization zone, simultaneously expelling the photoinert material into the volumes of destructive interference. While the reaction and network formations in these systems are usually inherently

show abstract

Section: Resultsmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

Nanostructured, Highly Anisotropic, and Mechanically Robust Polymer Electrolyte Membranes via Holographic Polymerization

Smith

Pan

Cheng

et al. 2017

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…These two components therefore give rise to two glass transition temperatures: a higher and a lower T g . Madsen et al [90] designed a highly conductive and thermally stable ionogel formed by combining a rigid-rod polyanion, poly(2,2"-disulfonyl-4,4"-benzidine terephthalamide) (PBDT), as the polymer network and an ionic liquid, 1-ethyl-3-methyl-imidazolium trifluoromethanesulfonate ((C 2 mim) + (TfO) − ), as the plasticizer (Figure 11A to 11D).…”

Section: Ionogelmentioning

confidence: 99%

Energy gels: A bio-inspired material platform for advanced energy applications

et al. 2016

View full text Add to dashboard Cite

Energy conversion and storage systems with high efficiency have attracted great research interest in recent years. To improve the performance of energy devices, nanomaterials with delicately controlled structures and interfaces have been applied. However, low-dimensional nanomaterials suffer from inhomogeneous aggregation, severe re-stacking, and the formation of bottlenecks and poor contacts during the processing and assembly, thus hindering the transport of electrons or ions in energy devices. Gel materials, a special class of bio-inspired materials, are emerging as promising candidates to overcome the drawbacks of low-dimensional nanomaterials. The 3D nanostructured gel network promotes electron transport along the backbone while facilitating the diffusion of ions through hierarchical pores, as well as providing high surface area for interfacial reactions. In addition, the properties of gels can be facilely tuned, thereby further extending their applications and improving their performance. To date, various synthesis strategies have been developed for the preparation of gel materials, including carbon-based gels, conductive polymer gels, ionically conductive gels and inorganic gels. These gel materials have successfully served as

show abstract

“…In contrast, synthetic hydrogels usually have an isotropic and amorphous structure, resulting in the absence of anisotropic optical and mechanical properties. Inspired by the nature, there are many efforts to develop anisotropic hydrogels by different strategies, including molecular self‐assembly, electric/magnetic field‐directed orientation, and diffusion‐induced orientation, to form ordered structures before or during the gelation process. For instance, Thomas and co‐workers prepared photonic hydrogels by molecular self‐assembly of a block copolymer to form a uniform lamellar structure, which was subsequently fixed by chemical cross‐linking .…”

Section: Introductionmentioning

confidence: 99%

Programmed Diffusion Induces Anisotropic Superstructures in Hydrogels with High Mechano‐Optical Sensitivity

Qiao

Gong

et al. 2019

Adv Materials Technologies

View full text Add to dashboard Cite

including low sliding friction and strong bonding to the bone. [2,3] In contrast, synthetic hydrogels usually have an isotropic and amorphous structure, resulting in the absence of anisotropic optical and mechanical properties. Inspired by the nature, there are many efforts to develop anisotropic hydrogels by different strategies, [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21] including molecular self-assembly, [5,6] electric/magnetic field-directed orientation, [7][8][9][10][11][12][13][14] and diffusion-induced orientation, [15][16][17] to form ordered structures before or during the gelation process. For instance, Thomas and co-workers prepared photonic hydrogels by molecular self-assembly of a block copolymer to form a uniform lamellar structure, which was subsequently fixed by chemical cross-linking. [5] The resultant hydrogel showed iridescent colors under different ionic strength owing to the Bragg diffraction of the light with a specific wavelength. Aida, Miyamoto, and their coworkers applied magnetic and electric fields to orient the charged nanosheets followed by in situ polymerization of the precursor solution to fabricate monodomain nanocomposite hydrogels, which showed anisotropic optical and mechanical properties, as well as anisotropic actuation under external stimulations. [7][8][9] Dobashi and co-workers have developed anisotropic physical hydrogels by dialyzing the solution of curdlan or DNA in the solution of multivalent metallic ions, in which the diffusion of ions induced molecular orientation and gelation of the negatively charged, rigid biomacromolecules. [15,16] Although big progress has been achieved in designing monodomain hydrogels, it still remains a big challenge to develop anisotropic gels with intricate ordered structures, because of lacking efficient approach to control the local orientation of molecules or nanoparticles at different regions. Recently, Studart and co-workers fabricated composite hydrogels by multistep polymerization with a magnetic field to orient the nanofillers along a specific direction. [22,23] The integrated hydrogels with complex ordered structures showed programmed deformations under external stimulations. However, the fabrication process was time-consuming because the separate domains with specific orientations should be completed step-wisely to form the composite hydrogel. A facile and efficient strategy is really desired to prepare hydrogels with intricate anisotropic superstructures, which is an important step to develop biomimetic materials with versatile functions. A straightforward idea is to simultaneously modulate the external field with independent Most soft biotissues possess intricate anisotropic superstructures, which afford living organism versatile functionalities. However, it remains a big challenge to develop such complex ordered structures in synthetic hydrogels. Here a simple and efficient strategy to fabricate periodically patterned hydrogels with complex anisotropic structures by diffusion-induced orientation and g...

show abstract

Highly Conductive and Thermally Stable Ion Gels with Tunable Anisotropy and Modulus

Cited by 72 publications

References 59 publications

Nanostructured, Highly Anisotropic, and Mechanically Robust Polymer Electrolyte Membranes via Holographic Polymerization

Nanostructured, Highly Anisotropic, and Mechanically Robust Polymer Electrolyte Membranes via Holographic Polymerization

Energy gels: A bio-inspired material platform for advanced energy applications

Programmed Diffusion Induces Anisotropic Superstructures in Hydrogels with High Mechano‐Optical Sensitivity

Contact Info

Product

Resources

About