Mechanistic insights into high-rate Li/Na storage: natural pyrite-derived FeS2/graphene anodes with intercalation-pseudocapacitive behaviour

Authors: Ye, J., Wei, S., Karunarathne, S., Fu, H., Xie, K., Bassyouni, M., Mahmoud, E.R.I., Kamali, A.R. and Abdelkader, A.M.

Journal: Journal of Colloid and Interface Science

Volume: 703

eISSN: 1095-7103

ISSN: 0021-9797

DOI: 10.1016/j.jcis.2025.139207

Abstract:

The exploitation of earth-abundant and cost-effective electrode materials is crucial for large-scale energy storage applications. Herein, we report a facile synthesis strategy to fabricate FeS2/graphene heterostructure composite electrodes derived from natural pyrite ore via a scalable ball milling method. The obtained FeS2/graphene electrode delivers superior electrochemical performance in both lithium-ion and sodium-ion batteries, all demonstrating an intriguing “negative fading” phenomenon, in which the reversible capacity increases over extended cycling. Among them, the FeS2-G5 electrode-prepared via 5 h of ball milling-delivers the most pronounced performance, with the capacity rising to approximately 620 mAh g−1 after 1173 cycles at a high current density of 1 A g−1 in sodium-ion batteries. Systematic investigations employing in-situ electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were conducted to elucidate the underlying mechanisms of “negative fading” and capacity degradation. Moreover, full cells constructed using Na3V2(PO4)3 cathodes paired with FeS2-G5 anodes demonstrate the reversible capacity of 237 mAh g−1 after 200 cycles and a promising high initial energy density of 136 wh kg−1(total active material mass) at a current density of 100 mA g−1, highlighting the practical viability of natural FeS2-based electrodes for large-scale energy storage applications.

Source: Scopus

Mechanistic insights into high-rate Li/Na storage: natural pyrite-derived FeS2/graphene anodes with intercalation-pseudocapacitive behaviour.

Authors: Ye, J., Wei, S., Karunarathne, S., Fu, H., Xie, K., Bassyouni, M., Mahmoud, E.R.I., Kamali, A.R. and Abdelkader, A.M.

Journal: J Colloid Interface Sci

Volume: 703

Issue: Pt 2

Pages: 139207

eISSN: 1095-7103

DOI: 10.1016/j.jcis.2025.139207

Abstract:

The exploitation of earth-abundant and cost-effective electrode materials is crucial for large-scale energy storage applications. Herein, we report a facile synthesis strategy to fabricate FeS2/graphene heterostructure composite electrodes derived from natural pyrite ore via a scalable ball milling method. The obtained FeS2/graphene electrode delivers superior electrochemical performance in both lithium-ion and sodium-ion batteries, all demonstrating an intriguing "negative fading" phenomenon, in which the reversible capacity increases over extended cycling. Among them, the FeS2-G5 electrode-prepared via 5 h of ball milling-delivers the most pronounced performance, with the capacity rising to approximately 620 mAh g-1 after 1173 cycles at a high current density of 1 A g-1 in sodium-ion batteries. Systematic investigations employing in-situ electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were conducted to elucidate the underlying mechanisms of "negative fading" and capacity degradation. Moreover, full cells constructed using Na3V2(PO4)3 cathodes paired with FeS2-G5 anodes demonstrate the reversible capacity of 237 mAh g-1 after 200 cycles and a promising high initial energy density of 136 wh kg-1(totalactive material mass) at a current density of 100 mA g-1, highlighting the practical viability of natural FeS2-based electrodes for large-scale energy storage applications.

Source: PubMed

Mechanistic insights into high-rate Li/Na storage: natural pyrite-derived FeS2/graphene anodes with intercalation-pseudocapacitive behaviour

Authors: Ye, J., Wei, S., Karunarathne, S., Fu, H., Xie, K., Bassyouni, M., Mahmoud, E.R.I., Kamali, A.R. and Abdelkader, A.M.

Journal: JOURNAL OF COLLOID AND INTERFACE SCIENCE

Volume: 703

eISSN: 1095-7103

ISSN: 0021-9797

DOI: 10.1016/j.jcis.2025.139207

Source: Web of Science (Lite)

Mechanistic insights into high-rate Li/Na storage: natural pyrite-derived FeS<sub>2</sub>/graphene anodes with intercalation-pseudocapacitive behaviour.

Authors: Ye, J., Wei, S., Karunarathne, S., Fu, H., Xie, K., Bassyouni, M., Mahmoud, E.R.I., Kamali, A.R. and Abdelkader, A.M.

Journal: Journal of colloid and interface science

Volume: 703

Issue: Pt 2

Pages: 139207

eISSN: 1095-7103

ISSN: 0021-9797

DOI: 10.1016/j.jcis.2025.139207

Abstract:

The exploitation of earth-abundant and cost-effective electrode materials is crucial for large-scale energy storage applications. Herein, we report a facile synthesis strategy to fabricate FeS2/graphene heterostructure composite electrodes derived from natural pyrite ore via a scalable ball milling method. The obtained FeS2/graphene electrode delivers superior electrochemical performance in both lithium-ion and sodium-ion batteries, all demonstrating an intriguing "negative fading" phenomenon, in which the reversible capacity increases over extended cycling. Among them, the FeS2-G5 electrode-prepared via 5 h of ball milling-delivers the most pronounced performance, with the capacity rising to approximately 620 mAh g-1 after 1173 cycles at a high current density of 1 A g-1 in sodium-ion batteries. Systematic investigations employing in-situ electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) were conducted to elucidate the underlying mechanisms of "negative fading" and capacity degradation. Moreover, full cells constructed using Na3V2(PO4)3 cathodes paired with FeS2-G5 anodes demonstrate the reversible capacity of 237 mAh g-1 after 200 cycles and a promising high initial energy density of 136 wh kg-1(totalactive material mass) at a current density of 100 mA g-1, highlighting the practical viability of natural FeS2-based electrodes for large-scale energy storage applications.

Source: Europe PubMed Central