Exergy degradation and thermal dissipation in Li/FeS2 batteries under overvoltage stress
This study provides a pioneering thermodynamic and thermal analysis of Li/FeS₂ batteries subjected to over- voltage conditions. A comprehensive mathematical model was developed to simulate the thermal behavior of these batteries under overcharging, incorporating both voltage peaks and the state of c...
| Autores: | ; ; |
|---|---|
| Tipo de documento: | Artículo |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Universidad de Oviedo (UNIOVI) |
| Repositorio: | RUO. Repositorio Institucional de la Universidad de Oviedo |
| Lenguaje: | Inglés |
| OAI Identifier: | oai:digibuo.uniovi.es:10651/80316 |
| Acceso en línea: | https://hdl.handle.net/10651/80316 https://dx.doi.org/10.1016/j.applthermaleng.2025.127812 |
| Nivel de acceso: | Acceso abierto |
| Palabra clave: | Energy and exergy analysis Lithium batteries FeS2 cathode Energy storage |
| _version_ | 1878736292540317696 |
|---|---|
| author | Fernández Fernández, Daniel |
| author2 | Álvarez Fernández, Martina Inmaculada|||0000-0002-5681-6530 Ríos Fernández, Juan Carlos|||0000-0002-2984-9206 |
| author2_role | author author |
| author_browse | Fernández Fernández, Daniel Ríos Fernández, Juan Carlos|||0000-0002-2984-9206 Álvarez Fernández, Martina Inmaculada|||0000-0002-5681-6530 |
| author_facet | Fernández Fernández, Daniel Álvarez Fernández, Martina Inmaculada|||0000-0002-5681-6530 Ríos Fernández, Juan Carlos|||0000-0002-2984-9206 |
| author_role | author |
| collection | RUO. Repositorio Institucional de la Universidad de Oviedo |
| description | This study provides a pioneering thermodynamic and thermal analysis of Li/FeS₂ batteries subjected to over- voltage conditions. A comprehensive mathematical model was developed to simulate the thermal behavior of these batteries under overcharging, incorporating both voltage peaks and the state of charge. This approach facilitates a precise evaluation of the thermal energy generated under extreme operating conditions, thereby representing a significant advancement in understanding the thermal processes in these batteries. The experi- mental validation of the proposed model demonstrated its reliability, confirming that increased overvoltage leads to a considerable reduction in both energy and exergy efficiency due to heat generation and exergy loss. Furthermore, an increase in battery voltage results in a considerable rise in battery temperature, which has the potential to exceed safety limits. This can have a detrimental effect on battery performance and lifespan. Spe- cifically, an increase in voltage from 5 V (V) to 10 V resulted in a 1.4 % reduction in exergy destruction and a halving of energetic efficiency. This finding suggests that the battery was operating well below its optimal ef- ficiency. Moreover, the study examined the thermal and exergonic behavior of Li/FeS₂ batteries in both series and parallel configurations. In series, an increase in voltage resulted in trends analogous to those observed in individual batteries. Specifically, the cell nearest to the power source dissipated more heat and exhibited higher efficiency compared to the cell further from the source. Conversely, in parallel configurations, the battery nearest to the power source exhibited only a slight decrease in heat dissipation (2.2 %), but experienced a significant reduction in generated entropy (80.4 % and 80.3 %) and exergy destruction. The second battery in parallel demonstrated behavior consistent with that observed in series configurations, indicating that parallel configu- rations exhibit reduced efficiency under overvoltage conditions in comparison to series configurations. This investigation constitutes the initial comprehensive inquiry into the thermal and exergonic behavior of lithium- pyrite batteries under overvoltage conditions. The investigation establishes a foundation for future research endeavors aimed at optimizing battery performance, safety, and thermal management. The methodology pro- posed for quantifying energy and exergy is of crucial importance for developing strategies to improve energy efficiency, extend battery lifespan, and reduce environmental impact. These advances contribute to the advancement of sustainable energy storage systems. |
| eu_rights_str_mv | openAccess |
| format | article |
| id | ES_8c79204bbec4e7d3b54802341d6ef52a |
| institution | Universidad de Oviedo (UNIOVI) |
| instname_str | Universidad de Oviedo (UNIOVI) |
| language | eng |
| network_acronym_str | ES |
| network_name_str | España |
| oai_identifier_str | oai:digibuo.uniovi.es:10651/80316 |
| publishDate | 2025 |
| publishDateSort | 2025 |
| publisher | Elsevier |
| publisherStr | Elsevier |
| reponame_str | RUO. Repositorio Institucional de la Universidad de Oviedo |
| spelling | Exergy degradation and thermal dissipation in Li/FeS2 batteries under overvoltage stress Fernández Fernández, Daniel Álvarez Fernández, Martina Inmaculada|||0000-0002-5681-6530 Ríos Fernández, Juan Carlos|||0000-0002-2984-9206 Energy and exergy analysis Lithium batteries FeS2 cathode Energy storage This study provides a pioneering thermodynamic and thermal analysis of Li/FeS₂ batteries subjected to over- voltage conditions. A comprehensive mathematical model was developed to simulate the thermal behavior of these batteries under overcharging, incorporating both voltage peaks and the state of charge. This approach facilitates a precise evaluation of the thermal energy generated under extreme operating conditions, thereby representing a significant advancement in understanding the thermal processes in these batteries. The experi- mental validation of the proposed model demonstrated its reliability, confirming that increased overvoltage leads to a considerable reduction in both energy and exergy efficiency due to heat generation and exergy loss. Furthermore, an increase in battery voltage results in a considerable rise in battery temperature, which has the potential to exceed safety limits. This can have a detrimental effect on battery performance and lifespan. Spe- cifically, an increase in voltage from 5 V (V) to 10 V resulted in a 1.4 % reduction in exergy destruction and a halving of energetic efficiency. This finding suggests that the battery was operating well below its optimal ef- ficiency. Moreover, the study examined the thermal and exergonic behavior of Li/FeS₂ batteries in both series and parallel configurations. In series, an increase in voltage resulted in trends analogous to those observed in individual batteries. Specifically, the cell nearest to the power source dissipated more heat and exhibited higher efficiency compared to the cell further from the source. Conversely, in parallel configurations, the battery nearest to the power source exhibited only a slight decrease in heat dissipation (2.2 %), but experienced a significant reduction in generated entropy (80.4 % and 80.3 %) and exergy destruction. The second battery in parallel demonstrated behavior consistent with that observed in series configurations, indicating that parallel configu- rations exhibit reduced efficiency under overvoltage conditions in comparison to series configurations. This investigation constitutes the initial comprehensive inquiry into the thermal and exergonic behavior of lithium- pyrite batteries under overvoltage conditions. The investigation establishes a foundation for future research endeavors aimed at optimizing battery performance, safety, and thermal management. The methodology pro- posed for quantifying energy and exergy is of crucial importance for developing strategies to improve energy efficiency, extend battery lifespan, and reduce environmental impact. These advances contribute to the advancement of sustainable energy storage systems. This work has been supported by the project REF.SV-24-GIJÓN-1-03 from the University Institute of Industrial Technology of Asturias (IUTA), financed by the City Council of Gijón. Spain. Elsevier https://hdl.handle.net/10651/80316 https://dx.doi.org/10.1016/j.applthermaleng.2025.127812 |
| spellingShingle | Exergy degradation and thermal dissipation in Li/FeS2 batteries under overvoltage stress Fernández Fernández, Daniel Energy and exergy analysis Lithium batteries FeS2 cathode Energy storage |
| title | Exergy degradation and thermal dissipation in Li/FeS2 batteries under overvoltage stress |
| title_full | Exergy degradation and thermal dissipation in Li/FeS2 batteries under overvoltage stress |
| title_fullStr | Exergy degradation and thermal dissipation in Li/FeS2 batteries under overvoltage stress |
| title_full_unstemmed | Exergy degradation and thermal dissipation in Li/FeS2 batteries under overvoltage stress |
| title_short | Exergy degradation and thermal dissipation in Li/FeS2 batteries under overvoltage stress |
| title_sort | Exergy degradation and thermal dissipation in Li/FeS2 batteries under overvoltage stress |
| topic | Energy and exergy analysis Lithium batteries FeS2 cathode Energy storage |
| topic_facet | Energy and exergy analysis Lithium batteries FeS2 cathode Energy storage |
| url | https://hdl.handle.net/10651/80316 https://dx.doi.org/10.1016/j.applthermaleng.2025.127812 |