Recent advances in solid-state polymer electrolytes and innovative ionic liquids based polymer electrolyte systems

Isikli, Süheda; Ryan, Kevin M.

doi:10.1016/j.coelec.2020.01.015

Cited by 37 publications

(13 citation statements)

References 16 publications

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“…Lithium metal has the highest theoretical specific capacity (3.86 Ah g –1 ) of any anode material for lithium-based batteries. , Nanostructured block copolymer electrolytes present one approach for enabling solid-state lithium metal batteries . Polymer-based lithium metal batteries have had limited commercial success for reasons including: limited electrolyte conductivity, the need to establish new manufacturing protocols, and issues related to the reactive and pyrophoric nature of lithium metal …”

Section: Introductionmentioning

confidence: 99%

“…4 Polymer-based lithium metal batteries have had limited commercial success for reasons including: limited electrolyte conductivity, the need to establish new manufacturing protocols, and issues related to the reactive and pyrophoric nature of lithium metal. 5 The purpose of this paper is to shed light on the nature of ion transport in nanostructured block copolymers under direct current (dc) polarization. Prior to polarization, the salt ions are uniformly distributed in all conducting domains of the block copolymer.…”

Section: ■ Introductionmentioning

confidence: 99%

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Orientation-Dependent Distortion of Lamellae in a Block Copolymer Electrolyte under DC Polarization

et al. 2021

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Lithium-salt-doped block copolymers have the potential to serve as solid electrolytes in rechargeable batteries with lithium metal anodes. In this work, we use small angle X-ray scattering (SAXS) to study the structure of polystyrene-block-poly(ethylene oxide) doped with bis-(trifluoromethylsulfonyl)amine lithium salt (LiTFSI) during dc polarization experiments in lithium-lithium symmetric cells. The block copolymer studied is nearly symmetric in composition, has a total molecular weight of 39 kg mol -1 , and it exhibits a lamellar morphology at all studied salt concentrations. When ionic current is passed through the electrolyte, a salt concentration gradient forms which induces a spatial gradient in the domain spacing, d . The dependence of d on distance from the positive electrode, x , was determined experimentally by

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Orientation-Dependent Distortion of Lamellae in a Block Copolymer Electrolyte under DC Polarization

et al. 2021

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“…In recent decades, conducting polymers have attracted the attention of many research groups due to their great technological potential (Le et al, 2017;Isikli and Ryan, 2020;Shirakawa, 2001;Ngai et al, 2016). These polymeric materials, because they are organic conductors, combine properties of traditional polymers such as resistance to corrosion, organic and inorganic solvents, flexibility, and metals such as high electrical conductivity and magnetic properties, which makes them attractive for applications in organic electronics.…”

Section: Introductionmentioning

confidence: 99%

“…On the other hand, solid polymeric electrolytes (SPEs) are capable of conducting the electric current and making artificial muscles, flexible batteries, fuel cells, among others. Due to the displacement of ions (i.e., electrolytes) through the polymer matrix, in this case, the polymer chains have fixed electrical charges that allow them to interact with species ionic mobiles to maintain their electroneutrality (Isikli and Ryan, 2020;Ngai et al, 2016;Owens, 2000). These polymers are mostly of petrochemical origin and therefore generate contamination from the production of the raw material they produce to their final disposal.…”

Section: Introductionmentioning

confidence: 99%

Thermal and Electrochemical Properties of Solid Biopolymer Electrolytes From Starch of Different Botanical Origin

Arrieta¹

2021

PTQ

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Background: Solid biopolymer electrolytes are a type of material with high technological potential used in the development of solar cells, batteries, fuel cells, among others, due to their biodegradable nature and low environmental impact. Aim: This study aimed to evaluate the effect of the botanical origin of the starch used to prepare solid biopolymeric electrolyte films on its electrochemical and thermal properties and to establish the variations in thermal decomposition temperatures and redox potentials depending on the botanical origin of the starch used. Methods: Films of solid biopolymer electrolyte were made by thermochemical synthesis processes using corn starch, cassava starch, potato starch, glycerol, polyethylene glycol, and glutaraldehyde as plasticizers and lithium perchlorate salt. The synthesis solutions were taken to an oven at 70 °C for 48 hours. The films were characterized electrochemically by cyclic voltammetry using a dry electrochemical cell and thermally by differential scanning calorimetry and thermogravimetric analysis. Results and Discussion: The results showed that the electrochemical behavior of the films was similar in terms of registered redox processes. However, the potential values of the oxidation and reduction were different, as are the stability and intensity of the processes. On the other hand, the thermal analysis allowed establishing two decomposition processes in each of the films studied; the first process was due to dehydration and depolymerization phenomena in the films. The temperatures recorded were 59.0 °C, 58.9 °C, and 89.9 °C for potato starch, cassava starch, and corn starch films. The second process evidenced the thermal decomposition at different temperatures, 267.7 °C in potato starch films, 280.6 °C in corn starch films, and 287.1 °C in cassava starch films. Conclusions: It could be concluded that the botanical origin of the starch used in the synthesis of solid biopolymer electrolyte films affects its behavior and electrochemical and thermal stability.

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“…Polymer electrolyte types include solid polymer‐only [ 28 ] and ionic polymers. [ 29 ] Poly(ethylene oxide) (PEO), [ 30 ] poly(acrylonitrile) (PAN), [ 31 ] poly(methyl methacrylate) (PMMA), [ 32 ] poly(vinyl alcohol) (PVA), [ 33 ] and poly(propylene) oxide (PPO) [ 34 ] are commonly used as solid polymer‐only electrolytes, but their ionic conductivity (2 × 10 −5 to 2 × 10 −4 S cm −1 at RT [ 35,36 ] ) is relatively low. Ionic polymers that solidify a cation–anion pair (e.g., from an ionic liquid, IL) into a polymer matrix are attractive because ILs have negligible vapor pressure, high electrochemical stability, and excellent thermal resistance.…”

Section: Introductionmentioning

confidence: 99%

A Solid‐State Battery Cathode with a Polymer Composite Electrolyte and Low Tortuosity Microstructure by Directional Freezing and Polymerization

Huang

Leung

et al. 2020

Advanced Energy Materials

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Rechargeable batteries that provide increased specific energy and improved safety over commercial Li ion batteries (LIBs) are in demand for applications such as electric vehicles (EVs), all-electric aircraft and the grid-scale storage of electricity from renewable but intermittent electricial generation. [1] Most commercial LIBs use a graphite anode (theoretical capacity 372 mAh g −1 , electrochemical potential −0.43 V versus standard hydrogen electrode). [2] Although graphite is relatively low cost and easy to process into electrodes at large scale, a switch to a Li metal anode would provide a theoretical capacity of 3860 mAh g −1 and a lower electrochemical potential (−3.04 V versus standard hydrogen electrode). [3] When a Li metal anode is coupled with a high capacity cathode (e.g., LiNi 0.8 Mn 0.1 Co 0.1 O 2 (NMC811)), the resulting battery would approximately double specific energy from 250 to 300 Wh kg −1 for commercial LIBs to ≈500 Wh kg −1 . [4][5][6] However, a Li metal anode is unstable with conventional liquid electrolytes (which are also flammable) and Li dendrites formed during cycling may readily penetrate through standard porous olefin separators and cause short circuits, rapid discharge, and a range of subsequent safety hazards. [7] Solid-state Li metal batteries (SLMBs) use a solid-state electrolyte (SSE) to replace the liquid electrolyte and separator, and alongside capacity improvements, also have the potential to enable safer cycling, although achieving practical current densities remains a significant challenge. [8] Compared with the high ionic conductivity of liquid electrolytes (10 −3 -10 −2 S cm −1 at room temperature, RT), SSEs usually have much lower intrinsic ionic conductivities at RT, [9] and most SSLMB research has therefore focused on increasing the ionic conductivity of SSEs. The SSEs divide into two main families: inorganic electrolytes and polymer electrolytes. [10] Inorganic electrolyte types include NASICON, [11][12][13] garnet, [14][15][16] perovskite, [17][18][19] LISICON, [20] sulfide, [21][22][23][24] argyrodite, [25][26][27] glassy, [9] etc. Inorganic electrolytes typically have ionic conductivities of 2 × 10 −5 to 2 × 10 −3 S cm −1 at RT. Practical applications have been limited by manufacturing difficulties (fragility over large areas), poor electrode/ SSE interfacial contact, and risk of Li dendrite growth along grain boundaries, although steady progress is being made. [10] In most polymer electrolytes, Li + ionic conductivity is achieved by Solid-state Li metal batteries (SSLMBs) combine improved safety and high specific energy that can surpass current Li ion batteries. However, the Li + ion diffusivity in a composite cathode-a combination of active material and solidstate electrolyte (SSE)-is at least an order of magnitude lower than that of the SSE alone because of the highly tortuous ion transport pathways in the cathode. This lowers the realizable capacity and mandates relatively thin (30-300 μm) cathodes, and hence low overall energy storage. Here, a thick (600 μm...

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Recent advances in solid-state polymer electrolytes and innovative ionic liquids based polymer electrolyte systems

Cited by 37 publications

References 16 publications

Orientation-Dependent Distortion of Lamellae in a Block Copolymer Electrolyte under DC Polarization

Orientation-Dependent Distortion of Lamellae in a Block Copolymer Electrolyte under DC Polarization

Thermal and Electrochemical Properties of Solid Biopolymer Electrolytes From Starch of Different Botanical Origin

A Solid‐State Battery Cathode with a Polymer Composite Electrolyte and Low Tortuosity Microstructure by Directional Freezing and Polymerization

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