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Layer-by-Layer Assembly of Strong Thin Films with High Lithium Ion Conductance for Batteries and Beyond
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- Wang, Zhen (author)
- KTH,Fiberteknologi
-
- Ouyang, Liangqi (author)
- KTH,Fiberteknologi
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- Li, Hailong (author)
- KTH,Fiberteknologi
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- (creator_code:org_t)
- 2021-07
- 2021
- English.
- In: Small. - : Wiley. - 1613-6810 .- 1613-6829. ; 17:32, s. 2100954-
- Journal article (peer-reviewed)
Abstract
Subject headings
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- Polyethylene oxide (PEO) is one of the most widely used polymeric ion conductors which has the potential for a wide range of applications in energy storage. The enhancement of ionic conductivity of PEO-based electrolytes is generally achieved by sacrificing the mechanical properties. Using layer-by-layer (LbL) self-assembly with a nanoscale precision, mechanically strong and self-healable PEO/polyacrylic acid composite thin films with a high Li+ conductivity of 2.3 ± 0.8 × 10−4 S cm−1 at 30 °C, and a strength of 3.7 MPa is prepared. These values make the LbL composite among the best recorded multifunctional solid electrolytes. The electrolyte thin film withstands at least 1000 cycles of striping/plating of Li at 0.05 mA cm−2. It is further shown that the LbL thin films can be used as separators for Li-ion batteries to deliver a capacity of 116 mAh g−1 at 0.1 C in an all-LbL-assembled lithium iron phosphate/lithium titanate battery. Finally, it is demonstrated that the thin films can be used as ion-conducting substrates for flexible electrochemical devices, including micro supercapacitors and electrochemical transistors.
Subject headings
- NATURVETENSKAP -- Kemi -- Materialkemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences -- Materials Chemistry (hsv//eng)
Keyword
- ionic conduction
- lithium-ion batteries
- mechanical strength
- self-assembly
- Energy storage
- Ions
- Iron compounds
- Lithium compounds
- Nanocomposite films
- Polyethylene oxides
- Self assembly
- Solid electrolytes
- Thin film lithium ion batteries
- Composite thin films
- Electrochemical transistors
- Electrolyte thin film
- Layer by layer self assembly
- Layer-by-layer assemblies
- Lithium iron phosphates
- Micro supercapacitors
- Polyethylene oxide (PEO)
- Thin films
Publication and Content Type
- ref (subject category)
- art (subject category)
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- Wang, Zhen
- Ouyang, Liangqi
- Li, Hailong
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- NATURAL SCIENCES
- NATURAL SCIENCES
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- By the university
- Royal Institute of Technology
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