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Valorizing Waste-Derived Carbon for Advanced Battery Applications: Innovations and Sustainable Pathways

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: closed (10 March 2026) | Viewed by 974

Special Issue Editors


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Guest Editor
CIQUP/IMS - Chemistry Research Center, Faculty of Sciences, University of Porto, Rua do Campo Alegre 1021, 4169-007 Porto, Portugal
Interests: energy storage; supercapacitors; sustainable carbons; lithium–sulfur batteries
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
CIQUP/IMS - Chemistry Research Center, Faculty of Sciences, University of Porto, Rua do Campo Alegre 1021, 4169-007 Porto, Portugal
Interests: supercapacitors; carbon nanomaterials; ionic liquids; energy storage; nanopesticides; environmental safety; cytotoxicity; ecotoxicity; food allergens
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue delves into the transformative potential of waste-derived carbons in addressing global energy storage challenges. With increasing demand for sustainable, efficient, and scalable energy solutions, this issue explores how valorizing waste streams—ranging from biomass to industrial by-products—can revolutionize battery technologies. While excluding sodium-ion batteries as a primary focus, the issue highlights applications in lithium-ion, lithium–sulfur, and emerging energy storage systems.

Key themes include innovative methodologies for the synthesis and structural tuning of waste-derived carbons to achieve high performance and longevity in batteries. Studies investigating the role of these materials in enhancing solid-electrolyte interphase (SEI) stability, improving ionic conductivity, and advancing electrode architectures are particularly welcomed. The issue also seeks insights into environmental impact analysis, promoting a circular economy approach.

This Special Issue invites researchers to showcase advances in fabrication techniques, such as hybrid electrode designs, and their integration into real-world energy applications. By bridging the gap between waste management and sustainable energy storage, this issue aims to contribute to the global transition towards greener energy systems, driving innovations that align with the United Nations Sustainable Development Goals (SDGs) and the broader push for resource conservation and carbon neutrality.

Dr. Ana Teresa Brandão
Dr. Carlos Pereira
Guest Editors

Manuscript Submission Information

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Keywords

  • green electrochemistry
  • sustainable energy storage
  • eco-friendly technologies
  • electrochemical processes
  • renewable energy conversion
  • environmental remediation
  • sustainable batteries
  • waste-to-energy systems
  • energy efficiency

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Published Papers (1 paper)

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Research

29 pages, 3039 KB  
Article
Light-Enhanced Electrochemical Performance of Fish Waste-Derived Carbon-TiO2 Composites for Sustainable Energy Storage Systems
by Ana T. S. C. Brandão, Sabrina State, Laura Bianca Enache, Renata Costa, Geanina Valentina Mihai, José A. Vázquez, Jesus Valcarcel, Liana Anicai, Marius Enachescu and Carlos M. Pereira
Nanomaterials 2026, 16(9), 538; https://doi.org/10.3390/nano16090538 - 29 Apr 2026
Viewed by 535
Abstract
This work reports on the synthesis and electrochemical investigation of sustainable carbon–TiO2 nanocomposites derived from marine biowaste, designed to elucidate light-assisted charge storage mechanisms in non-aqueous electrolytes. Porous carbons obtained from prawn chitin and blue shark gelatin were decorated in situ with [...] Read more.
This work reports on the synthesis and electrochemical investigation of sustainable carbon–TiO2 nanocomposites derived from marine biowaste, designed to elucidate light-assisted charge storage mechanisms in non-aqueous electrolytes. Porous carbons obtained from prawn chitin and blue shark gelatin were decorated in situ with TiO2 nanoparticles using a deep eutectic solvent (DES) as a green synthesis medium. Structural and morphological characterisation revealed that TiO2 incorporation induces significant nanoscale reorganisation of the carbon framework, resulting in hierarchical porosity, increased surface area, and intimate semiconductor–carbon interfaces. Electrochemical evaluation in a three-electrode configuration using an ethaline-based DES electrolyte demonstrated that TiO2 decoration substantially enhances capacitive performance and cycling stability, with the prawn chitin-derived composite achieving a specific capacitance of 54 ± 3 F g−1 and 91% retention after 10,000 cycles. Under illumination, all TiO2-containing composites exhibited a pronounced increase in anodic current response and discharge time, indicating photo-assisted surface charge accumulation. Although the absolute capacitance values are modest compared to those of aqueous supercapacitor systems, the results provide mechanistic insight into the interplay among nanostructure, semiconductor photoactivity, and ion transport in viscous, hydrogen-bonded DES electrolytes. By combining waste-derived carbons, green synthesis routes, and photo-responsive nanostructures, this study highlights a sustainable strategy for developing multifunctional carbon-based nanomaterials with light-modulated electrochemical behaviour. Full article
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