Engineering of electrospun polyimide separators for electrical double-layer capacitors and lithium-ion cells

Pai, Jui-Yu; Hsieh, Cheng-Ta; Lee, Chih-Hung; Wang, Jeng-An; Ku, Hao-Yu; Huang, Chun‐Lung; Hardwick, Laurence J.; Hu, Chi‐Chang

doi:10.1016/j.jpowsour.2020.229054

Cited by 39 publications

(18 citation statements)

References 40 publications

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“…The better capacity retention is attributable to the HDPE/20%Alu separator with good pore uniformity and low resistance, as well as the lower interfacial charge-transfer resistance, favors the charge–discharge process of LIBs. As mentioned before, the addition of alumina NPs may improve the wettability between separator and electrolyte since inorganic particles have been found to promote the electrolyte affinity to the separators, , resulting in the high capacity retention for the cell using the HDPE/20%Alu separator. Furthermore, the above better C-rate performance is attributable to the lower total resistance of the cell using the HDPE/20%Alu separator, resulting from its larger pore size, higher porosity, and better wettability to the electrolyte in comparison with the HDPE separator.…”

Section: Resultsmentioning

confidence: 96%

“…This benefit may be due to the presence of ceramic NPs in the separator, which improve the wettability among electrode materials, separator, and electrolyte. 18,19 From Figure 10b, the results of the cycle life test indicate that the cell with the pure HDPE separator shows the worse cycle life as compared to that with the HDPE/20%Alu separator. In this 100-cycle test, the capacity retention is about 83% for the cell using the pure HDPE separator.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…The sum of the real part resistance in the two semicircles, attributable to the contact impedance among active materials and the charge-transfer resistance of active materials, is affected by the separator, suggesting that the interfacial charge-transfer resistance is reduced by the usage of the HDPE/20%Alu separator. This benefit may be due to the presence of ceramic NPs in the separator, which improve the wettability among electrode materials, separator, and electrolyte. , …”

Section: Resultsmentioning

confidence: 99%

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A Novel Cavity-Enhanced Polyethylene/Nanostructured-Alumina Separator with Long Cycle Life and High Rate Capability for Advanced Lithium-Ion Batteries

Lee

Huang²,

Kinzlinger

et al. 2021

ACS Sustainable Chem. Eng.

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Traditional polyolefin separators cannot meet the increasing requirements of lithium-ion batteries (LIBs) for the high power density, high energy density, and high safety that the secondary battery market has expanded to electric vehicles. It is still a great challenge to reduce ion-transport resistance, promote thermal stability, and improve the mechanical properties of polymer-based separators. Herein, a novel composite separator with enhanced conductivity, good mechanical strength, and high thermo-dimensional stability is designed and demonstrated for the application of advanced LIBs. The flexible multiarm structure of nanostructured alumina nanoparticles (NPs) greatly promotes the orientation of high density polyethylene (HDPE) during the polymer processing, significantly enhancing the pore cavity during the separator formation process. The porosity, pore size distribution, thermo-dimensional stability, and mechanical strength of the resultant composite separator are significantly improved, leading to long cycle life and high rate capability. The orientation/ crystallization development of HDPE by the introduction of alumina NPs has been examined via microstructure analysis. This demonstration not only shows the high impact on the separator manufacturing of LIBs with a high power density and high safety but also creates a new method in controlling the orientation and cavity design of polyolefin materials.

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Section: Resultsmentioning

confidence: 96%

Section: ■ Results and Discussionmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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A Novel Cavity-Enhanced Polyethylene/Nanostructured-Alumina Separator with Long Cycle Life and High Rate Capability for Advanced Lithium-Ion Batteries

Lee

Huang²,

Kinzlinger

et al. 2021

ACS Sustainable Chem. Eng.

Self Cite

View full text Add to dashboard Cite

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“…Furthermore, in the same separator type and with the objective of enhancing thermal runaway, melaminebased porous organic polymer (POP) coatings [213] were implemented. In fact, different materials have been used as a layer on the surface of polyolefin separators to improve its wettability, including polyethyleneimine (PEI)/dopamine coating layer [188], Al 2 O 3 layers in electrospun PVDF nanofibers [193], ammonium persulfate (APS) coating [194], a phenolic resin (AF) layer with immersion in situ reaction [186], a thin layer of lowdensity polyethylene microspheres [199], polyamine (PAI) containing natural clay nanorods (attapulgite, ATP) [197], and polyvinyl alcohol (PVA) [214], TiO 2 [215], Al 2 O 3 [216], UVinduced graft with polar methyl acrylate (MA) [217], and polyimide (PI)-SiO 2 layers [218].…”

Section: Separator Membranementioning

confidence: 99%

Recent Advances on Materials for Lithium-Ion Batteries

et al. 2021

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Environmental issues related to energy consumption are mainly associated with the strong dependence on fossil fuels. To solve these issues, renewable energy sources systems have been developed as well as advanced energy storage systems. Batteries are the main storage system related to mobility, and they are applied in devices such as laptops, cell phones, and electric vehicles. Lithium-ion batteries (LIBs) are the most used battery system based on their high specific capacity, long cycle life, and no memory effects. This rapidly evolving field urges for a systematic comparative compilation of the most recent developments on battery technology in order to keep up with the growing number of materials, strategies, and battery performance data, allowing the design of future developments in the field. Thus, this review focuses on the different materials recently developed for the different battery components—anode, cathode, and separator/electrolyte—in order to further improve LIB systems. Moreover, solid polymer electrolytes (SPE) for LIBs are also highlighted. Together with the study of new advanced materials, materials modification by doping or synthesis, the combination of different materials, fillers addition, size manipulation, or the use of high ionic conductor materials are also presented as effective methods to enhance the electrochemical properties of LIBs. Finally, it is also shown that the development of advanced materials is not only focused on improving efficiency but also on the application of more environmentally friendly materials.

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“…Based on different energy storage mechanisms, supercapacitors are mainly divided into two categories: faradic pseudocapacitors, in which transition metal oxides and conducting polymers are used as active materials, and electrical double-layer capacitors (EDLCs), in which carbon-based materials are often used as active materials ( Adhikari et al, 2020 ; Liu T et al, 2020 ; Say et al, 2020 ). The energy storage mechanism of EDLCs depends on the attraction of positive and negative charges at the interface of electrode and electrolyte, enabling high power density and ultralong cycling life of EDLCs ( Fleischmann et al, 2020 ; Pai et al, 2021 ; Pourhosseini et al, 2021 ). Activated carbons (ACs) are the most commonly used electrode material for EDLCs ( Zhang et al, 2015 ; Zhang et al, 2018 ; Zhang et al, 2019 ), which possess high surface area, good electrochemical stability, and affordable cost ( Heidarinejad et al, 2020 ; Lv et al, 2021 ; Wu et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Nickel Acetate-Assisted Graphitization of Porous Activated Carbon at Low Temperature for Supercapacitors With High Performances

Zhang

Qiu

et al. 2022

Front. Chem.

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Catalytic graphitization opens a route to prepare graphitic carbon under fairly mild conditions. Biomass has been identified as a potentially attractive precursor for graphitic carbon materials. In this work, corn starch was used as carbon source to prepare hollow graphitic carbon microspheres by pyrolysis after mixing impregnation with nitrate salts, and the surface of these carbon microspheres is covered with controllable pores structure. Under optimal synthesis conditions, the prepared carbon microspheres show a uniform pore size distribution and high degree of graphitization. When tested as electrode materials for supercapacitor with organic electrolyte, the electrode exhibited a superior specific capacitance of 144.8 F g−1 at a current density of 0.1 A g−1, as well as large power density and a capacitance retention rate of 93.5% after 1,000 cycles in galvanostatic charge/discharge test at 1.0 A g−1. The synthesis extends use of the renewable nature resources and sheds light on developing new routes to design graphitic carbon microspheres.

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Engineering of electrospun polyimide separators for electrical double-layer capacitors and lithium-ion cells

Cited by 39 publications

References 40 publications

A Novel Cavity-Enhanced Polyethylene/Nanostructured-Alumina Separator with Long Cycle Life and High Rate Capability for Advanced Lithium-Ion Batteries

A Novel Cavity-Enhanced Polyethylene/Nanostructured-Alumina Separator with Long Cycle Life and High Rate Capability for Advanced Lithium-Ion Batteries

Recent Advances on Materials for Lithium-Ion Batteries

Nickel Acetate-Assisted Graphitization of Porous Activated Carbon at Low Temperature for Supercapacitors With High Performances

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