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Scalable Nanomaterials and Nanostructures for Energy and Flexible Electronics
Liangbing (Bing) Hu
MSE & Energy CenterUniversity of Maryland College Park
Email: [email protected]
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Transparent Paper from Wood Cellulose
Participants:
Objective:• Transparent paper for flexible electronics• Novel structures• Scalable fabrication method• Fundamental properties
For More information, please contact Dr. Liangbing (Bing) Hu ([email protected])
Why It Matters:
• Replace plastics with better performance • Both strong and tough• Lightweight materials• Flexible or origami electronics
Recent Accomplishments
• Development of Gen 1, 2, 3 and 4 transparent paper• Tunable optical properties• Demonstrate proof-of-concept devices (transistor,touch screen, OLED, solar cells• ~ 10 publications, 1 patent applications, ~10
invited talks
Client• AFOSR YIP• DuPont, Versopaper
• UMD- Teng Li, Jeremy Munday
80 85 90 95 10001
20
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Solar cells
Tran
smiss
ion
haze
(%)
Transmittance (%)
PET
Nanopaper
Our transparent paper
Displays Glass
Wood-Fiber Based Energy Storage
Participants:
Objective:• Mesoscience in wood fibers• Low-cost energy storage (< 50$/kWh)• Supercapacitors, batteries
For More information, please contact Dr. Liangbing (Bing) Hu ([email protected])
Why It Matters:• Low cost• Benefit from paper manufacturing infrastructure• Flexible energy storage
Recent Accomplishments
• Na-ion battery anode with 200 mAh/g• MnO2 supercapacitor cycling for 20,000 cycles• Published in Nano Lett 2013 (widely reported)
Clients• NSF, DOE
• UMD-Teng Li, Gary Rubloff, Sangbok Lee
• Fast ion transport• Mechanical
Multi-Functional Fibers From Nanocellulose by Wet-Spinning
Participants:
Objective:• Use nanocellulose fiber and (reduced)
graphene oxide or CNT toward multifunctional fibers
• Fiber diameter ~ 10-100 micro• Single fiber measurement
For More information, please contact Dr. Liangbing (Bing) Hu ([email protected])
Why It Matters:
Recent Accomplishments
• Highly conductive fibers based on CNT-NFC hybrids through alignment (300 -500 S/cm)• Highly thermally conductive fibers• NFC-GO fiber that is strong than NFC fiber or GO
fiber Clients
• NSF (Pending)
• UMD-Teng Li
• Low cost• NFC as dispersion agent (ink) and key component
in fibers
Ca2+
Ca2+
GO nanosheet
GO nanosheet NFC
a
b
Thermally Conductive Films with BN Nanosheets
Participants:
Objective:
• Highly thermally conductive nanocompositeswith solution based BN• NFC to disperse BN• NFC to mechanically link BN nanosheets
For More information, please contact Dr. Liangbing (Bing) Hu ([email protected])
Why It Matters:
• Thermal management (e.g. batteries)
Recent Accomplishments
• 100-150 W/mK is achieved• Scalable BN nanosheet ink • Manuscript in ACS Nano Clients
• AFOSR, DOD STTR (pending), AllCellTech
• UMD-Bao Yang
Electrochemical Modulations of 2D Optoelectronics
Participants:
Objective:
• Nano-battery platform to study optical, electrical properties under electrochemical modulations
For More information, please contact Dr. Liangbing (Bing) Hu ([email protected])
Why It Matters:• Understand battery kinetics• Replace ITO transparent electrode
Recent Accomplishments• Performance beyond graphene limit (3 Ohm/sq, >92%)• Best performance in Rs/T• Manuscript in Nature Comm (under minor revision)
Clients• NSF (Pending)
• UMD-Mike Fuhrer
0
500
1000
LiC6 Theorgraph
ITO P doped graph
CNT
σ dc/σ o
pt
FeCl3graph
Na-ion Batteries with Sn Nanoparticles
Participants:
Objective:
• Ultra-thin Al2O3 nanoglue to improve performance of Sn anode for Na-ion batteries
• Mixed electronic and ionic conductivity
For More information, please contact Dr. Liangbing (Bing) Hu ([email protected])
Why It Matters:• Low-cost energy storage for Grid
Recent Accomplishments
• Highest capacity of Sn anode for Na-ion (~ 600 mAh/g)
• In-situ TEM investigation of sodiation-desodiationprocess at the nanoscale
• Published in Nano Lett 2013
Clients• DOE EFRC
• UMD-Teng Li
0 10 20 30 40 500
200
400
600
800
1000
1200
without Al2O3
Char
ge c
apac
ity (m
Ah/g
)Cycle number
with Al2O3
0
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Coul
ombi
c ef
ficie
ncy
(%)
0 200 400 600 800 1000
0.0
0.5
1.0
1.5
2.0
2.5
3.0with Al2O3
40th 10th1st
40th10thVolta
ge (V
vs.
Na+ /N
a )
Capacity (mAh/g)
1st
All-Solid State Batteries (High Voltage, Li-S)
Participants:
Objective:• Safe 6V Li-ion with Garnet electrolyte• Safe Li-S with Garnet electrolyte
For More information, please contact Dr. Eric Wachsman ( [email protected]) or Dr. Liangbing (Bing) Hu ([email protected])
Why It Matters:• Vehicle applications• Space applications
Recent Accomplishments
• Garnet electrode ~10-3 S/cm• Stable vs. Li metal• Stable up to 6 V Clients
• DOE ARPA-E
• UMD-Eric Wachsman
Roll-To-Roll Films with Nano-carbon Inks
Participants:
Objective:
• Scalable ink for roll-to-roll printing• Ink characterizations and scalable printing• Graphene• Carbon nanotube
For More information, please contact Dr. Liangbing (Bing) Hu ([email protected])
Why It Matters:• To replace ITO transparent electrode
• Multifunctional structures
Recent Accomplishments
• Aqueous graphen ink without surfactant
• Scalable coating of graphene ink
• 3-year industry experience on roll-to-roll CNT printing/device integration
Clients• NSF
• UMD-John Cumings
Holey-Graphene and Its Nanostructures
Participants:
Objective:• Scalable synthesis of holey graphene • Self-assembly for nanostructures• Edge functionalization• Energy and lightweight materials
For More information, please contact Dr. Yi Lin ([email protected]) ) or Dr. Liangbing (Bing) Hu ([email protected])
Why It Matters:• Enable better packing toward high density• Fast ion transport through plane (low tortuosity) • Rich surface chemistry for hybrid structures
Recent Accomplishments• Scalable synthesis• Reach excellent capacity per volume in
supercapacitors with ionic liquid electrolyte• Selective functionalization on graphene edges• Improved mechanical properties compared with
pristine graphene• Manuscript in preparation
Clients• NASA (Pending)
• NIA – Yi Lin• Central Michigan U (Veronica Barone)• UMD- Teng Li
Nanomanufacturing in Paper and Textile
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