27467
2012
deu
lecture
0
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IMPACT OF IONIC LIQUID ON THE MECHANICAL PERFORMANCE OF MATRIX POLYMER FOR FIBRE REINFORCED MATERIALS FOR ENERGY STORAGE
ECCM 15 - European Conference on Composite Materials
30283
ECCM 15 - European Conference on Composite Materials
Venice, Italy
2012-06-24
2012-06-24
0
Malte Wienrich
Weder Datei noch physisches Exemplar vorhanden ("No Access")
Präsentation
28694
2012
eng
1
8(?)
conferenceobject
University of Padova
0
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Multifunctional epoxy resin for structural supercapacitors
Polymer-based electrolytes based on commercially available epoxy resins were prepared through the addition of a liquid electrolyte, a solution of a lithium salt in an ionic liquid. The polymer monoliths were characterized using impedance spectroscopy, 3-point bending test, scanning electron microscopy (SEM) and nitrogen adsorption (BET). The balance of ionic conductivity and flexural modulus is crucially dependent on the relative proportions of epoxy resin to electrolyte. Also the effect of the liquid electrolyte on curing kinetics and processing was assessed by complex viscosity measurements and differential scanning calorimetry (DSC). Only one out of the three resins investigated exhibited a significant acceleration effect.
ECCM15 - 15th European conference on composite materials (Proceedings)
31573
978-88-88785-33-2
Sonderstandort: Publica-Schrank
ECCM15 - 15th European conference on composite materials
Venice, Italy
2012-06-24
2012-06-28
A. Bismarck
S. Carreyette
Q.P.V. Fontana
E.S. Greenhalgh
P. Jacobsson
P. Johansson
M.J. Marczewski
Gerhard Kalinka
A. Kucernak
M.S. Shaffer
N. Shirshova
J.H.G. Steinke
Malte Wienrich
eng
uncontrolled
Multifunctional epoxy
eng
uncontrolled
Polymer electrolyte
eng
uncontrolled
Morphology
eng
uncontrolled
Ionic liquid
Verlagsliteratur
Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
28695
2012
eng
1
4(?)
conferenceobject
University of Padova
0
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Impact of ionic liquid on the mechanical performance of matrix polymer for fibre reinforced materials for energy storage
For the concept of using structural materials such as carbon fibre reinforced plastics as
energy storage devices, new matrix polymers are required. These polymers must provide ionic
conductivity as well as adequate mechanical strength. In the EU-Project StorAGE this
requirements are fulfilled by adding ionic liquid to commercial polymers. The mechanical
properties of these mixtures materials were characterized by using a 3-point-bending device.
In addition, single fibre pull test were performed in order to get information on the interfacial
shear strength. Adding of ionic liquid has an impact on the mechanical performance of the
materials. A decrease of the flexural strength and modulus of less than 10% of the value of the
reference materials took part. The interfacial shear strength decreased to a value of around
one third compare to the reference material.
ECCM15 - 15th European conference on composite materials (Proceedings)
31574
978-88-88785-33-2
Sonderstandort: Publica-Schrank
ECCM15 - 15th European conference on composite materials
Venice, Italy
2012-06-24
2012-06-28
Malte Wienrich
Gerhard Kalinka
E.S. Greenhalgh
S. Carreyette
Martina Bistritz
N. Shirshova
M. Houllé
L. E. Asp
A. Bismarck
Q.P.V. Fontana
eng
uncontrolled
Multifunctional epoxy resin
eng
uncontrolled
Fibre-matrix adhesion
eng
uncontrolled
Single fibre pull-out test
eng
uncontrolled
Ionic liquid
Verlagsliteratur
Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access")
29272
2013
eng
2228
2237
conferenceobject
Canadian Association for Composite Structures and Materials
1
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Mechanical and microstructural characterisation of multifunctional structural power composites
Although the inherent anisotropy of polymer composites has presented daunting technical challenges, these materials now offer engineers considerable opportunities for efficient structural design. More recently, the advent of multifunctional composites which can fulfill more than one role within a system has attracted considerable interest, providing designers with exciting opportunities to innovate. Of particular interest here are structural power composites, which simultaneously carry mechanical load whilst storing/delivering electrical energy. Although the development of these composites is highly challenging, often with conflicting constituent requirements, the STORAGE consortium has had considerable success in the development of these materials for automotive applications.
The focus of this paper is structural supercapacitors, the basic architecture of a single cell of which is shown in Fig. 1. This entails two carbon fibre woven lamina (electrodes) which sandwich a glass fibre woven lamina (separator), all of which is embedded within a multifunctional matrix (electrolyte). This architecture has been the focus of the research to date, leading to components such as that shown in Fig.1 having been fabricated. This paper reports on the mechanical properties and microstructures of the different reinforcement and matrix combinations for structural supercapacitors.
ICCM19 - 19th International conference on composite materials (Proceedings)
32183
ICCM19 - 19th International conference on composite materials
Montreal, Canada
28.07.2013
02.08.2013
21.10.2013
E.S. Greenhalgh
J. Ankersen
L. E. Asp
A. Bismarck
Q.P.V. Fontana
M. Houlle
Gerhard Kalinka
A. Kucernak
M. Mistry
S. Nguyen
H. Qian
M.S.P. Shaffer
N. Shirshova
J.H.G. Steinke
Malte Wienrich
eng
uncontrolled
Structural electrolyte
eng
uncontrolled
Multifunctional supercapacitor
eng
uncontrolled
Fractography
eng
uncontrolled
Ionic conductivity
eng
uncontrolled
Mechanical properties
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
29273
2013
eng
72
79
conferenceobject
Canadian Association for Composite Structures and Materials
1
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Correlations between mechanical properties and ionic conduction of structural electrolytes with bicontinuous morphologies
Electrolyte systems that can carry mechanical load while allowing for high levels of ionic conductivity are an important prerequisite for structural power storage devices. Introduction of structural power storage into the variety of consumer products will allow saving in weight and volume. Moreover, using a supercapacitor/battery system in hybrid electric vehicles (HEV), the supercapacitor part will extend the battery lifetime by protecting it from the high peak currents. To successfully produce structural power storage requires the development
of multifunctional electrolytes where one has to simultaneously maximize mechanical properties and ionic conductivity.
ICCM19 - 19th International conference on composite materials (Proceedings)
32184
ICCM19 - 19th International conference on composite materials
Montreal, Canada
28.07.2013
02.08.2013
21.10.2013
N. Shirshova
A. Bismarck
S. Carreyette
E.S. Greenhalgh
P. Johansson
M.J. Marczewski
P. Jacobsson
Gerhard Kalinka
M.S.P. Shaffer
Malte Wienrich
J.H.G. Steinke
eng
uncontrolled
Structural electrolyte
eng
uncontrolled
Multifunctional supercapacitor
eng
uncontrolled
Bicontinuous morphology
eng
uncontrolled
Epoxy resin
eng
uncontrolled
Ionic conductivity
eng
uncontrolled
Mechanical properties
Datei im Netzwerk der BAM verfügbar ("Closed Access")
Graue Literatur
37699
2016
eng
16351
16358
25
8
article
ACS Publications
1155 Sixteenth Street, NW, Washington, DC 20036, USA
1
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Property and shape modulation of carbon fibers using lasers
An exciting challenge is to create unduloid-reinforcing fibers with tailored dimensions to produce synthetic composites with improved toughness and increased ductility. Continuous carbon fibers, the state-of-the-art reinforcement for structural composites, were modified via controlled laser irradiation to result in expanded outwardly tapered regions, as well as fibers with Q-tip (cotton-bud) end shapes. A pulsed laser treatment was used to introduce damage at the single carbon fiber level, creating expanded regions at predetermined points along the lengths of continuous carbon fibers, while maintaining much of their stiffness. The range of produced shapes was quantified and correlated to single fiber tensile properties. Mapped Raman spectroscopy was used to elucidate the local compositional and structural changes. Irradiation conditions were adjusted to create a swollen weakened region, such that fiber failure occurred in the laser treated Region producing two fiber ends with outwardly tapered ends. Loading the tapered fibers allows for viscoelastic energy dissipation during fiber pull-out by enhanced friction as the fibers plough through a matrix. In these tapered fibers, diameters were locally increased up to 53%, forming outward taper angles of up to 1.8°. The tensile strength and strain to failure of the modified fibers were significantly reduced, by 75% and 55%, respectively, ensuring localization of the break in the expanded region; however, the fiber stiffness was only reduced by 17%. Using harsher irradiation conditions, carbon fibers were completely cut, resulting in cottonbud fiber end shapes. Single fiber pull-out tests performed using these fibers revealed a 6.75-fold increase in work of pull-out compared to pristine carbon fibers. Controlled laser irradiation is a route to modify the shape of continuous carbon fibers along their lengths, as well as to cut them into controlled lengths leaving tapered or cotton-bud shapes.
ACS Applied Materials & Interfaces
10.1021/acsami.6b05228
1944-8244
1944-8252
10.10.2016
J. J. Blaker
David B. Anthony
G. Tang
S.-R. Shamsuddin
Gerhard Kalinka
Malte Wienrich
Amin Abdolvand
M. S. P. Shaffer
A. Bismarck
eng
uncontrolled
Composite
eng
uncontrolled
Irradiation
eng
uncontrolled
Pull-out tests
eng
uncontrolled
Pulsed laser treatment
eng
uncontrolled
Single carbon fibers
Ingenieurwissenschaften und zugeordnete Tätigkeiten
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
34565
2014
eng
28377
28387
49
118
article
Soc.
Washington, DC
American Chemical Society
1
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Composition as a means to control morphology and properties of epoxy based dual-phase structural electrolytes
Structural electrolytes were prepared using a fully formulated commercially available high performance epoxy resin (MTM57) and an ionic liquid based electrolyte: lithium bis(trifluoromethylsulfonyl)imide (LiTFSI) dissolved in 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (EMIM-TFSI). Through a systematic study, the composition of the formulations was found to have a greater effect than the curing temperature on the morphology and properties of the resulting structural electrolytes. The presence of lithium salt is essential to form a structurally homogeneous electrolyte. Bicontinuous morphologies containing continuous (coarse) epoxy networks surrounded by connected spherical epoxy nodules were obtained with different length scales upon varying the lithium salt concentration. Increasing the LiTFSI concentration improved the miscibility of MTM57 with the electrolyte and decreased the characteristic length scale of the resulting bicontinuous microstructure. The properties of the structural electrolytes correlated with the morphology, showing increased Youngs modulus and decreased ionic conductivity with increasing lithium salt concentration. The miscibility of the epoxy system with the electrolyte was also improved by substitution of EMIM-TFSI with an equal weight of an aprotic organic solvent, propylene carbonate (PC); however, the window of PC concentrations which resulted in structural electrolytes with bicontinuous microstructures was very narrow; at PC concentrations above 1 wt %, gel-like polymers with no permanent mesoporosity were obtained.
The journal of physical chemistry / C
37701
10.1021/jp507952b
1932-7447
1089-5639
15.10.2015
N. Shirshova
A. Bismarck
E.S. Greenhalgh
P. Johansson
Gerhard Kalinka
M.J. Marczewski
M.S.P. Shaffer
Malte Wienrich
eng
uncontrolled
Functional composites
eng
uncontrolled
Mechanical properties
eng
uncontrolled
Elastic properties
eng
uncontrolled
Epoxy
eng
uncontrolled
Morphology
eng
uncontrolled
Electrolyte
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")
29735
2013
eng
15300
15309
48
1
article
RSC
London [u.a.]
1
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Structural supercapacitor electrolytes based on bicontinuous ionic liquid-epoxy resin systems
'Structural electrolytes' retain the desirable mechanical characteristics of structural (epoxy) resins whilst introducing sufficient ionic conductivity to operate as electrolytes in electrochemical devices. Here, a series of ionic liquid–epoxy resin composites were prepared to identify the optimum system microstructure required to achieve a high level of multifunctionality. The ionic conductivity, mechanical properties, thermal stability and morphology of the cured epoxy based structural electrolytes were studied as a function of phase composition for three fully formulated high performance structural epoxy systems. At only 30 wt% of structural resin and 70 wt% of ionic liquid based electrolyte, stiff monolithic plaques with thicknesses of 2–3 mm were obtained with a room temperature ionic conductivity of 0.8 mS cm-1 and a Young's modulus of 0.2 GPa. This promising performance can be attributed to a long characteristic length scale spinodal microstructure, suggesting routes to further optimisation in the future.
Journal of materials chemistry A
32667
10.1039/c3ta13163g
2050-7496
2050-7488
11.12.2013
N. Shirshova
A. Bismarck
S. Carreyette
Q.P.V. Fontana
E.S. Greenhalgh
P. Jacobsson
P. Johansson
M.J. Marczewski
Gerhard Kalinka
A.R.J. Kucernak
J. Scheers
M.S.P. Shaffer
J.H.G. Steinke
Malte Wienrich
eng
uncontrolled
Epoxy
eng
uncontrolled
Ionic liquid
eng
uncontrolled
Supercapacitor
Eigenverlag BAM
Datei im Netzwerk der BAM verfügbar ("Closed Access")
34567
2014
eng
1
12
article
Sage
London
1
--
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Mechanical, electrical and microstructural characterisation of multifunctional structural power composites
Multifunctional composites which can fulfil more than one role within a system have attracted considerable interest. This work focusses on structural supercapacitors which simultaneously carry mechanical load whilst storing/delivering electrical energy. Critical mechanical properties (in-plane shear and in-plane compression performance) of two monofunctional and four multifunctional materials were characterised, which gave an insight into the relationships between these properties, the microstructures and fracture processes. The reinforcements included baseline T300 fabric, which was then either grafted or sized with carbon nanotubes, whilst the baseline matrix was MTM57, which was blended with ionic liquid and lithium salt (two concentrations) to imbue multifunctionality. The resulting composites exhibited a high degree of matrix heterogeneity, with the ionic liquid phase preferentially forming at the fibres, resulting in poor matrix-dominated properties. However, fibre-dominated properties were not depressed. Thus, it was demonstrated that these materials can now offer weight savings over conventional monofunctional systems when under modest loading.
Journal of composite materials
37703
10.1177/0021998314554125
0021-9983
1530-793X
15.10.2015
E.S. Greenhalgh
J. Ankersen
L. E. Asp
A. Bismarck
Q.P.V. Fontana
M. Houlle
Gerhard Kalinka
A. Kucernak
M. Mistry
S. Nguyen
H. Qian
M.S.P. Shaffer
N. Shirshova
J.H.G. Steinke
Malte Wienrich
eng
uncontrolled
Carbon fibres
eng
uncontrolled
Functional composites
eng
uncontrolled
Mechanical properties
eng
uncontrolled
Elastic properties
eng
uncontrolled
Fractography
Verlagsliteratur
Datei im Netzwerk der BAM verfügbar ("Closed Access")