Electrophoretic coating of LiFePO4/Graphene oxide on carbon fibers as cathode electrodes for structural lithium ion batteries
Artikel i vetenskaplig tidskrift, 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
Författare
Jaime Sanchez Sanchez
2D-Tech
Chalmers, Industri- och materialvetenskap, Material och tillverkning
Johanna Xu
Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik
2D-Tech
Zhenyuan Xia
Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR)
Chalmers, Industri- och materialvetenskap, Material och tillverkning
Jinhua Sun
2D-Tech
Chalmers, Industri- och materialvetenskap, Material och tillverkning
Leif Asp
Chalmers, Industri- och materialvetenskap, Material- och beräkningsmekanik
2D-Tech
Vincenzo Palermo
Istituto per la Sintesi Organica e la Fotoreattività (ISOF-CNR)
Chalmers, Industri- och materialvetenskap, Material och tillverkning
2D-Tech
Composites Science and Technology
0266-3538 (ISSN)
Vol. 208 1087682D material-baserad teknologi för industriella applikationer (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)
Europeiska kommissionen (EU) (EC/H2020/738085), 2017-02-01 -- 2020-02-28.
Drivkrafter
Hållbar utveckling
Innovation och entreprenörskap
Styrkeområden
Transport
Energi
Materialvetenskap
Ämneskategorier
Annan kemiteknik
Kompositmaterial och -teknik
Infrastruktur
Chalmers materialanalyslaboratorium
DOI
10.1016/j.compscitech.2021.108768