RT info:eu-repo/semantics/article
T1 Semi-solid electrodes based on injectable hydrogel electrolytes for shape-conformable batteries
A1 Borlaf Pinar, Mario
A1 Picchio, Matias L.
A1 Luque, Gisela Carina
A1 Criado-Gonzalez, Miryam
A1 Guzmán-Gonzalez, Gregorio
A1 Perez Antolin, Daniel
A1 Lingua, Gabriele
A1 Mecerreyes, David
A1 Ventosa Arbaizar, Edgar
K1 Análisis electroquímico
K1 Electrochemical analysis
K1 Electroquímica
K1 Electrochemistry
K1 Pilas eléctricas
K1 Electric batteries
AB The development of new battery concepts, chemistries and fabrication processes is driven by the bloom of emerging applications in a variety of fields ranging from the Internet of Things to Smart Healthcare. Shape factor-free and shape-conformable power sources are highly desired for integration with complex-shape electronic devices. Herein, a new fabrication process for shape-conformable batteries is explored. Battery cells having targeted shapes are fabricated and assisted by 3D printing. Then, flowable semi-solid electrodes are used to fill in the prefabricated parts of the battery cell. The use of injectable hydrogel electrolytes enables semi-solid electrodes to possess special rheological properties as they are flowable during the fabrication process, while gelation of the electrolytes ensures their immobility during battery operation. Herein, poly(vinyl alcohol):gallic acid gels are investigated for aqueous Zn–LiFePO4 batteries. After evaluation of the effect of electrode formulation on the rheological properties as well as the ionic and electronic properties, simple-shape and UBU-shape batteries were fabricated using the best formulation. The prototype achieved areal capacities above 3 mA h cm−2, utilization rate between 150 and 180 mA h g−1 (LFP), and capacity fading of 0.2% h−1. While the prototype demonstrated the feasibility of the proposed fabrication process, improvements are still required. Shrinking of gel electrolytes and parasitic electrochemical reactions associated with the battery chemistry and the operation conditions are identified as the main challenges to be addressed for improving the performance.
PB Royal Society of Chemistry
SN 2753-1457
YR 2023
FD 2023-11
LK http://hdl.handle.net/10259/10281
UL http://hdl.handle.net/10259/10281
LA eng
NO The authors acknowledge the financial support by the Spanish Ministry of Science and Innovation and NextGenerationEU (TED2021-131651B-C21 and TED2021-131651B-C22) and Ramón y Cajal award (Ministry of Science and Innovation and European Social Funds, RYC2018-026086-I). This work was supported by the Regional Government of Castilla y León (Junta de Castilla y León) and by the Ministry of Science and Innovation MICIN and the European Union NextGenerationEU/PRTR (C17. I1). The Marie Sklodowska-Curie Research and Innovation Staff Exchanges (RISE) support under the grant agreement No 823989 “IONBIKE” is also greatly acknowledged.
DS Repositorio Institucional de la Universidad de Burgos
RD 14-mar-2025