Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties
Abstract
:1. Introduction
2. Ion Transport in Binary and Composite Polymer Electrolytes
3. Nanoparticle Additives Affect the Polymer Electrolyte Structure
3.1. Effect of Nanoparticles on Polymer Crystallinity
3.2. Effect of Nanoparticles on Polymer Chain Conformation
3.3. Effect of Nanoparticles on Polymer Chain Segmental Movement
3.4. Effect of Nanoparticles on Polymer Self-Assembly and Anisotropic Conductivity
3.5. Interaction of Nanoparticles with Polymer Chains
3.6. Single Ions versus Ion Pairs and Ion Aggregates within Composite Polymer Electrolytes
3.7. Effect of Nanoparticles on Transference Number of Composite Polymer Electrolytes
4. Nanoparticle Additives Affect the Polymer Electrolyte Dielectric Properties
4.1. Dielectric Constant (εr or ε’) and Dielectric Loss (εi or ε”)
4.2. Dielectric Relaxation Strength (Δε), Electrical Modulus (M) and Tangent Loss (tanδ)
4.3 AC/DC Conductivity and Impedance Spectroscopy
5. Nanoparticle Additives Affect the Polymer Electrolyte Thermal and Mechanical Properties
5.1. Thermal Properties
5.2. Mechanical Properties
5.2.1. Tensile Strength and Yield Strength
5.2.2. Rheology, Elastic and Viscous Modulus
6. Processing Conditions Affect Composite Polymer Electrolyte Properties
6.1. Thermal History
6.2. Physical Aging
6.3. Humidity
7. Summary and Outlook
Acknowledgments
Author Contributions
Conflicts of Interest
References
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CdO (wt %) | Tg (°C) (±2) | Tm (°C) (±2) | ΔH (J·g−1) | χc (%) |
---|---|---|---|---|
0 | −36.4 | 55.9 | 51.9 | 24.3 |
0.05 | −49.6 | 46.8 | 28.8 | 13.4 |
0.10 | −48.9 | 45.1 | 25.3 | 11.8 |
0.15 | −49.9 | 51.2 | 39.3 | 18.4 |
0.20 | −49.6 | 53.2 | 41.0 | 19.2 |
Series 1 | Series 2 | Series 3 | Series 4 | |
---|---|---|---|---|
Composition | [41]6[4]-I | [58]6[4]-I | [58]6[4]-I | [76]17[4]-II |
[58]6[4]-I | [58]12[4]-I | [58]6[8]-I | [76]17[8]-II | |
[73]6[4]-I | [58]20[4]-I | [58]6[10]-I | [76]17[10]-II | |
[78]6[4]-I | [58]6[15]-I | [76]17[15]-II | ||
[83]6[4]-I | [58]6[30]-I | [76]17[30]-II | ||
[91]6[4]-I | [58]6[80]-I | |||
[95]6[4]-I | ||||
TgNMR (°C) | Approximately constant X < 80: −32 ± 5 X > 80: −48 ± 5 | Increase −37 → −28 | Approximately constant −38 ± 5 | Decrease 7 → −16 |
Tmax (°C) | Approximately constant X < 80: 30 ± 5 X > 80: 21 ± 5 | Increase 26 → 46 | Approximately constant 19 ± 5 | Decrease 81 → 43 |
Δυ (kHz) | Increase 5.4 → 8.0 | Approximately constant 6.4 ± 0.3 | Decrease 6.4 → 2.7 | Increase 5.7 → 6.7 |
Sample | A | B | C | D |
---|---|---|---|---|
Structural O atoms | 86% | 87% | 89% | 83% |
Adsorbed O atoms | 45% | 39% | 36% | 44% |
Sample | t+NMR a | t+pol b |
---|---|---|
1M LiBF4 in EC–DEC | 0.52 | - |
G4mPEO swelled by EC–DEC | 0.14 | 0.34 |
G4mPEO–10 wt % SiO2, swelled by EC–DEC | 0.11 | 0.40 |
x wt % MMT | Δε | τε (μs) | τtanδ (μs) | τσ (μs) | σdc × 107 (S/cm) |
---|---|---|---|---|---|
0 | 18.39 | 17.11 | 7.58 | 3.46 | 0.54 |
1 | 21.19 | 11.58 | 5.35 | 2.24 | 0.66 |
2 | 29.14 | 7.99 | 3.42 | 1.47 | 1.62 |
3 | 29.45 | 9.53 | 4.00 | 1.64 | 1.60 |
5 | 94.59 | 9.29 | 2.71 | 0.10 | 3.91 |
Lithium trifluoromethanesulfonate, lithium triflate (CF3SO3Li) | |
Lithium bis(trifluoromethanesulfonyl) imide [LiN(SO2CF3)2] | |
Lithium tetrafluoroborate (LiBF4) | |
Lithium hexafluorophosphate (LiPF6) | |
Lithium perchlorate (LiClO4) | |
Lithium iodide (LiI) | |
Ethylene carbonate (EC), (CH2O)2CO | |
Propylene carbonate (PC), CH3C2H3O2CO | |
Diethyl carbonate (EDC), OC(OCH2CH3)2 |
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Wang, W.; Alexandridis, P. Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties. Polymers 2016, 8, 387. https://doi.org/10.3390/polym8110387
Wang W, Alexandridis P. Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties. Polymers. 2016; 8(11):387. https://doi.org/10.3390/polym8110387
Chicago/Turabian StyleWang, Wei, and Paschalis Alexandridis. 2016. "Composite Polymer Electrolytes: Nanoparticles Affect Structure and Properties" Polymers 8, no. 11: 387. https://doi.org/10.3390/polym8110387