Electrophoretic coating of LiFePO4/Graphene oxide on carbon fibers as cathode electrodes for structural lithium ion batteries
Journal article, 2021
Carbon fibers (CF), commonly used in the structure of airplanes or cars, can also work as conductive electrodes in “structural batteries” for distributed energy storage. To this aim CF should be chemically functionalized, which is challenging due to their complex geometry and surface. Here, we describe an “all-electrostatic” approach taking advantage of the intrinsic conductivity of CF to coat them with a cathode material composed of LiFePO4 blended
with nanosheets of electrochemically exfoliated graphene oxide (EGO). We first achieve electrostatic selfassembly of the nanometric components at the nanoscale, then use Electrophoretic Deposition (EPD) to obtain a uniform, macroscale coating on the fibers. We achieve a LiFePO4 loading >90 wt% featuring good adhesion on the carbon fibers, low degradation upon battery cycling, low charge transfer resistance. The electrode composite outperforms similar state-of-the-art cathode materials when used in Half-Cell vs. Li. Full battery cells using coated CF as cathode and pristine CF as anode yield specific energy density of 222.14 Wh⋅kg 1 and power density of 0.29 kW⋅kg 1 with 88.1% capacity retention at 1 C over 300 cycles, compatible with industrial applications of this technique in composites production.
with nanosheets of electrochemically exfoliated graphene oxide (EGO). We first achieve electrostatic selfassembly of the nanometric components at the nanoscale, then use Electrophoretic Deposition (EPD) to obtain a uniform, macroscale coating on the fibers. We achieve a LiFePO4 loading >90 wt% featuring good adhesion on the carbon fibers, low degradation upon battery cycling, low charge transfer resistance. The electrode composite outperforms similar state-of-the-art cathode materials when used in Half-Cell vs. Li. Full battery cells using coated CF as cathode and pristine CF as anode yield specific energy density of 222.14 Wh⋅kg 1 and power density of 0.29 kW⋅kg 1 with 88.1% capacity retention at 1 C over 300 cycles, compatible with industrial applications of this technique in composites production.
Li-ion batteries
Structural batteries
Electrophoretic deposition
Carbon fiber
Author
Jaime Sanchez Sanchez
2D-Tech
Chalmers, Industrial and Materials Science, Materials and manufacture
Johanna Xu
Chalmers, Industrial and Materials Science, Material and Computational Mechanics
2D-Tech
Zhenyuan Xia
Institute for organic syntheses and photoreactivity (ISOF-CNR)
Chalmers, Industrial and Materials Science, Materials and manufacture
Jinhua Sun
2D-Tech
Chalmers, Industrial and Materials Science, Materials and manufacture
Leif Asp
Chalmers, Industrial and Materials Science, Material and Computational Mechanics
2D-Tech
Vincenzo Palermo
Institute for organic syntheses and photoreactivity (ISOF-CNR)
Chalmers, Industrial and Materials Science, Materials and manufacture
2D-Tech
Composites Science and Technology
0266-3538 (ISSN)
Vol. 208 1087682D material-based technology for industrial applications (2D-TECH)
GKN Aerospace Sweden (2D-tech), 2021-01-01 -- 2024-12-31.
VINNOVA (2019-00068), 2020-05-01 -- 2024-12-31.
Structural pOweR CompositEs foR futurE civil aiRcraft (SORCERER)
European Commission (EC) (EC/H2020/738085), 2017-02-01 -- 2020-02-28.
Driving Forces
Sustainable development
Innovation and entrepreneurship
Areas of Advance
Transport
Energy
Materials Science
Subject Categories
Other Chemical Engineering
Composite Science and Engineering
Infrastructure
Chalmers Materials Analysis Laboratory
DOI
10.1016/j.compscitech.2021.108768