{"title":"Electrochemical Recycling of Lithium-Ion Battery Cathodes for Scalable and Sustainable Metal Recovery","authors":"Dazhi Yao, Long Ji, Yonggang Jin","doi":"10.1002/aesr.202500461","DOIUrl":"https://doi.org/10.1002/aesr.202500461","url":null,"abstract":"<p>The accelerating accumulation of spent lithium-ion batteries (LIBs) poses both a promising resource opportunity and a pressing recycling challenge. While pyrometallurgical and hydrometallurgical recycling routes are technologically mature, they are energy- and reagent-intensive, generate secondary pollution, and fail to preserve cathode structures for direct reuse. In contrast, electrochemical recycling is emerging as a transformative alternative, leveraging electricity as a clean and tunable “reagent” to enable indirect recycling via metal dissolution and selective recovery, and direct regeneration via relithiation under mild conditions. This approach offers high efficiency in recovery and short technology chain while significantly reducing chemical consumption and waste generation. However, its industrial deployment remains in early stages due to stability and scalability challenges. This work systematically evaluates key electrochemical strategies: electrochemical leaching, direct electrodeposition, selective ion separation, direct electrochemical relithiation, and molten-salt electrochemical strategies. Beyond summarizing recent advances, we critically examine how interfacial design, including slurry-electrode interactions, side-reactions, mediator and membrane stability, affects efficiency, selectivity, and durability, as well as reactor design for the scale-up production. We also assess techno-economic feasibility and scale-up bottlenecks, and outline a forward-looking roadmap integrating operando characterization, interfacial design, and continuous-flow reactors to advance low-carbon, scalable electrochemical recycling for a circular LIB supply chain.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 4","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.202500461","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Juan Camilo Gomez Trillos, Viswa Harinath Buddana, Veatriki Papantoni, Byungsul Min, Sebastian Junge, Jan-Dirk Kähler, Friedrich Schneider, Rolf Brendel, Thomas Vogt
{"title":"The Cost of Ownership and Minimum Sustainable Price of POLO BJ Cells Produced in Germany","authors":"Juan Camilo Gomez Trillos, Viswa Harinath Buddana, Veatriki Papantoni, Byungsul Min, Sebastian Junge, Jan-Dirk Kähler, Friedrich Schneider, Rolf Brendel, Thomas Vogt","doi":"10.1002/aesr.202500353","DOIUrl":"10.1002/aesr.202500353","url":null,"abstract":"<p>The p-type back junction (BJ) solar cell featuring n<sup>+</sup>-type passivating poly-Si on oxide (POLO) rear contacts has the potential of being an alternative for the passivated emitter and rear cell (PERC) concept. The cost of ownership (CoO), minimum sustainable price (MSP), and the levelized cost of electricity (LCOE) of POLO BJ cells produced in Germany and in a facility with a production capacity of 5 GWp*a<sup>−1</sup> are analyzed here. After assuming that POLO BJ can attain a cell efficiency of 24.2%, an investment of 256.8 million USD and variable and operating annual costs of 317.3 million USD are estimated. The CoO per Wp of cells with efficiency of 24.2% is estimated at 5.79 ¢*Wp<sup>−1</sup>, whereas the MSP would be 7.16 ¢*Wp<sup>−1</sup>, compared to PERC cells, for which an efficiency of 23.1% is assumed, resulting in a CoO and MSP of 6.31 and 7.75 ¢*Wp<sup>−1</sup>. The benefits of the higher efficiency of POLO BJ also propagate downstream to LCOE, as cells of this concept with the mentioned efficiency allow a LCOE under Southern European conditions integrated in monofacial glass–backsheet and bifacial glass–glass modules of 3.32 and 3.02 ¢*kWh<sup>−1</sup>, respectively. This is 0.14 ¢*kWh<sup>−1</sup> less than that of PERC cells. Other cost-reduction pathways were explored.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 4","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.202500353","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Francis O. Okoye, Maya Glasgow, Alamgir M. Haque, Pravin Babar, Christian E. Alvarez-Pugliese, Gerardine G. Botte
{"title":"Thermally Codeposited Bimetallic Copper–Cobalt Oxide Electrode for Electrocatalytic Nitrate Reduction to Ammonia","authors":"Francis O. Okoye, Maya Glasgow, Alamgir M. Haque, Pravin Babar, Christian E. Alvarez-Pugliese, Gerardine G. Botte","doi":"10.1002/aesr.70176","DOIUrl":"10.1002/aesr.70176","url":null,"abstract":"<p>The electrocatalytic reduction of nitrate (NO<sub>3</sub>RR) to ammonia presents a promising avenue for both wastewater treatment and nitrogen cycle restoration while simultaneously producing valuable renewable energy carriers. Despite recent advances, the development of stable and scalable catalysts that can bridge the gap between laboratory demonstrations and practical applications remains challenging. This study reports the synthesis of bimetallic copper–cobalt oxide catalyst supported on nickel sheet (referred to as CuCo<sub>2</sub>O<sub>4</sub>/Ni) via thermal treatment, demonstrating exceptional NO<sub>3</sub>RR performance. The bimetallic CuCo<sub>2</sub>O<sub>4</sub>/Ni catalyst, distinguished by its high surface area (10.94 mF cm<sup>−2</sup>) and abundant active sites, demonstrated superior catalytic activity compared to the monometallic counterparts, cobalt oxide (Co<sub>3</sub>O<sub>4</sub>/Ni), and copper oxide (CuO/Ni), positioning it among recently reported state-of-the-art catalytic materials. The as-prepared CuCo<sub>2</sub>O<sub>4</sub>/Ni achieved a remarkable ammonia (NH<sub>3</sub>) yield rate of 2.14 mmol cm<sup>2</sup> h<sup>−1</sup> with a Faradaic efficiency (FE) of 98.2% at a low potential of −0.37 V versus reversible hydrogen electrode (RHE) with an excellent 103-h stability performance (90% retention of FE), demonstrated at high nitrate concentrations (ANSOL), a critical aspect for addressing heavily polluted industrial and wastewater streams. This study establishes a promising synthetic route for stable bimetallic catalysts with superior electrocatalytic activity, potentially advancing the field toward sustainable ammonia production at a large scale.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 4","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.70176","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Techno-Economic-Environmental Assessment of Pyrolysis-Based Power Production From Methane","authors":"Muhammad Jalili Zarabadi, Siva Karuturi","doi":"10.1002/aesr.202500405","DOIUrl":"10.1002/aesr.202500405","url":null,"abstract":"<p>Methane pyrolysis enables low-carbon power generation by converting natural gas into hydrogen and solid carbon without direct carbon dioxide formation. This study presents a comprehensive techno-economic-environmental assessment of an integrated pyrolysis-based combined cycle (T-cycle) and benchmarks its performance against a conventional natural gas combined cycle (C-cycle). Thermodynamic modelling indicates that increasing pyrolysis temperature from 500°C to 1500°C enhances methane conversion (8% to 97%) and fuel LHV (51.73 to 115.3 MJ/kg) but reduces net power output (38.54 to 13.35 MW). At baseline conditions, the T-cycle achieves an ≈54% reduction in specific CO<sub>2</sub> emissions compared with the C-cycle, while the electricity selling price increases from $0.13/kWh to $0.35/kWh. Parametric analyses reveal that reactor pressure improves net power but suppresses methane conversion, highlighting a trade-off between efficiency and decarbonisation. Economic results indicate that electricity price parity between the two systems can be achieved under moderate carbon pricing or through valorisation of solid carbon byproducts, with a required solid carbon price of ≈1023 $/tonne in the absence of a carbon tax. Overall, the results demonstrate the system-level potential of methane pyrolysis as a strategic decarbonisation pathway for gas-fired power generation.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 4","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.202500405","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Recent Development in Designing Electrocatalysts for Efficient and Selective Ammonia Oxidation Reaction","authors":"Yeyu Deng, Zhixian Bao, Yuan Huang, Mingxin Cui, Yuan Chen, Hao Li, Li Wei","doi":"10.1002/aesr.202600002","DOIUrl":"10.1002/aesr.202600002","url":null,"abstract":"<p>Ammonia (NH<sub>3</sub>) is a critical chemical that is among the top 10 industrial chemicals produced annually in the world. Although the majority of NH<sub>3</sub> is currently used in fertilizer production, it has recently recognized as a promising carrier for the storage, transportation, and utilization of green hydrogen toward a sustainable future. In this process, the electrochemical ammonia oxidation reaction (AOR) is a crucial step and requires efficient catalysts to overcome the sluggish reaction kinetics to enable highly active and selective splitting of ammonia among varied reaction pathways. Herein, we summarize recent advancements in the ammonia oxidation reaction mechanism understandings, performance assessment protocols, and catalyst discovery and device integration to provide a timely overview of this topic. A perspective is provided at the end to cover emerging challenges and a proposal for future development.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 4","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.202600002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147684313","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nieves Espinosa, Davide Polverini, Felice Alfieri, Jaione Bengoechea, Cristina L. Pinto, Aleksandra Arcipowska
{"title":"Advancing European Union Circular Economy in Product Policy: A Recyclability Index for Photovoltaic Modules","authors":"Nieves Espinosa, Davide Polverini, Felice Alfieri, Jaione Bengoechea, Cristina L. Pinto, Aleksandra Arcipowska","doi":"10.1002/aesr.202500310","DOIUrl":"10.1002/aesr.202500310","url":null,"abstract":"<p>As photovoltaic (PV) deployment accelerates, improving the recyclability of PV modules is critical to reduce environmental impacts and support circular economy goals. This article presents a methodology to develop a recyclability index specifically tailored to PV modules, intended to inform future European Union (EU) policy instruments such as Ecodesign and Energy Labeling. The index evaluates service-related, dismantling-related, and material-related parameters, grounded in design-for-recycling (DfR) principles. A multicriteria weighting approach was applied to prioritize components based on environmental relevance, criticality, mass content, and economic value—highlighting materials such as glass, aluminum, silicon, and silver. The scoring system was calibrated through laboratory testing of representative PV modules, using purpose-developed dismantlability tests. The proposed index offers a robust, quantifiable tool to assess and compare PV modules designs based on their recyclability potential. It is intended to support policy development and market differentiation by promoting design choices that enhance material recovery, reduce waste and decrease reliance on virgin materials, contributing to the objectives of the EU Circular Economy Action Plans.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 3","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.202500310","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568586","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Philipp Penert, Lisa Sophie Neige, Christoph Lorenz, Wojciech Stawski, Birgit Esser
{"title":"Aryl Viologen Polymers in High-Voltage Full-Organic Batteries","authors":"Philipp Penert, Lisa Sophie Neige, Christoph Lorenz, Wojciech Stawski, Birgit Esser","doi":"10.1002/aesr.202500496","DOIUrl":"https://doi.org/10.1002/aesr.202500496","url":null,"abstract":"<p>Anion-rocking chair batteries, functioning without any metals, are intriguing candidates as alternative, more sustainable energy storage systems. They can be operated by using two types of p-type organic electrode-active materials (OAMs) with low and high redox potentials for the negative and positive electrode, respectively. However, identifying compatible material pairs delivering a potential difference above 1.5 V is challenging. Viologens are promising candidates as low-potential OAMs, but they usually lack stability when cycled over both redox processes. Herein, we report on linear and crosslinked <i>N</i>-aryl viologen polymers with enhanced electrochemical stability over both redox processes in lithium half-cells. We employ these as negative electrodes in anion-rocking chair full-cells with a dimethoxyphenothiazine-polymer-based positive electrode, able to undergo two reversible oxidations. The full-cell, using 2 <span>m</span> LiClO<sub>4</sub> in PC as electrolyte, delivered a voltage of ca. 1.8 V and a capacity of up to 78 mAh g<sup>−1</sup> and could be cycled over 100 cycles with a capacity retention of 71%. We further demonstrate a metal-free all-organic full-cell using <i>n</i>Bu<sub>4</sub>NClO<sub>4</sub> as electrolyte salt that delivers an even higher specific discharge capacity of up to 88 mAh g<sup>−1</sup>. This work constitutes a step forward toward anion-rocking chair batteries with attractive cell voltages exceeding 1.5 V.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 3","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.202500496","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147568587","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shaikat Chandra Dey, Seong-Min Cho, Jose A. Gonzalez-Aguirre, Md. Nazrul Islam, Ravindra Kumar Bhardwaj, Bertrand J. Tremolet de Villers, Brian J. Worfolk, William Joe Sagues, Steven M. Rowland, Mark R. Nimlos, Sunkyu Park
{"title":"From Pyrolysis Oil to Advanced Biographite Anode: Unravelling Biocoke Structural Evolution and Delayed Coking Effects","authors":"Shaikat Chandra Dey, Seong-Min Cho, Jose A. Gonzalez-Aguirre, Md. Nazrul Islam, Ravindra Kumar Bhardwaj, Bertrand J. Tremolet de Villers, Brian J. Worfolk, William Joe Sagues, Steven M. Rowland, Mark R. Nimlos, Sunkyu Park","doi":"10.1002/aesr.70168","DOIUrl":"https://doi.org/10.1002/aesr.70168","url":null,"abstract":"<p>Catalytic graphitization of biomass-derived carbon offers a promising route to produce biographite as a sustainable alternative to petroleum-based synthetic graphite for lithium-ion battery (LIB) anodes. This study investigates the physicochemical properties of biocokes produced from pyrolysis oil at carbonization temperatures ranging from 150°C to 500°C. Using an iron (Fe) catalyst, graphitization was performed at 1500°C, significantly lower than the ∼3000°C required for conventional synthetic graphite. The effects of introducing an intermediate-temperature hold (400°C–600°C) prior to graphitization were evaluated, simulating a “delayed coking” process to enable the coproduction of sustainable aviation fuels (SAFs). Chemical structure evolution during biocoke formation was analyzed, and proposed mechanisms are presented. Biographites produced via the delayed coking pathway exhibited high crystallinity and excellent electrochemical performance in both half-cell and full-cell LIB configurations. The full cells exhibited an initial discharge capacity close to the theoretical capacity of the NMC622 cathode (175 mAh/g at 4.2 V), and high capacity retention (∼88%) after 150 cycles. Notably, the graphitic and electrochemical properties remained stable across the range of intermediate hold temperatures. These findings provide a foundation for optimizing temperature parameters in delayed coking systems to enable scalable, integrated production of biographite and SAFs from pyrolysis oil.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 3","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://advanced.onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.70168","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Shaikat Chandra Dey, Seong-Min Cho, Jose A. Gonzalez-Aguirre, Md. Nazrul Islam, Ravindra Kumar Bhardwaj, Bertrand J. Tremolet de Villers, Brian J. Worfolk, William Joe Sagues, Steven M. Rowland, Mark R. Nimlos, Sunkyu Park
{"title":"From Pyrolysis Oil to Advanced Biographite Anode: Unravelling Biocoke Structural Evolution and Delayed Coking Effects","authors":"Shaikat Chandra Dey, Seong-Min Cho, Jose A. Gonzalez-Aguirre, Md. Nazrul Islam, Ravindra Kumar Bhardwaj, Bertrand J. Tremolet de Villers, Brian J. Worfolk, William Joe Sagues, Steven M. Rowland, Mark R. Nimlos, Sunkyu Park","doi":"10.1002/aesr.70168","DOIUrl":"https://doi.org/10.1002/aesr.70168","url":null,"abstract":"<p>Catalytic graphitization of biomass-derived carbon offers a promising route to produce biographite as a sustainable alternative to petroleum-based synthetic graphite for lithium-ion battery (LIB) anodes. This study investigates the physicochemical properties of biocokes produced from pyrolysis oil at carbonization temperatures ranging from 150°C to 500°C. Using an iron (Fe) catalyst, graphitization was performed at 1500°C, significantly lower than the ∼3000°C required for conventional synthetic graphite. The effects of introducing an intermediate-temperature hold (400°C–600°C) prior to graphitization were evaluated, simulating a “delayed coking” process to enable the coproduction of sustainable aviation fuels (SAFs). Chemical structure evolution during biocoke formation was analyzed, and proposed mechanisms are presented. Biographites produced via the delayed coking pathway exhibited high crystallinity and excellent electrochemical performance in both half-cell and full-cell LIB configurations. The full cells exhibited an initial discharge capacity close to the theoretical capacity of the NMC622 cathode (175 mAh/g at 4.2 V), and high capacity retention (∼88%) after 150 cycles. Notably, the graphitic and electrochemical properties remained stable across the range of intermediate hold temperatures. These findings provide a foundation for optimizing temperature parameters in delayed coking systems to enable scalable, integrated production of biographite and SAFs from pyrolysis oil.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 3","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.70168","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147567367","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Linus F. Huber, Apostolos Vagias, Suo Tu, Ting Tian, Lukas V. Spanier, Zhaonan Jin, Morgan P. Le Dû, Lixing Li, Sigrid Bernstorff, Peter Müller-Buschbaum
{"title":"Thermoelectric Performance and Morphological Stability of Thin Titania: Carbon Black Hybrid Films Against Humidity and Light Irradiation","authors":"Linus F. Huber, Apostolos Vagias, Suo Tu, Ting Tian, Lukas V. Spanier, Zhaonan Jin, Morgan P. Le Dû, Lixing Li, Sigrid Bernstorff, Peter Müller-Buschbaum","doi":"10.1002/aesr.202500347","DOIUrl":"https://doi.org/10.1002/aesr.202500347","url":null,"abstract":"<p>Thermoelectric titania thin films are of interest for energy generation and sensor applications. To be usable in practice, they need to be stable against atmospheric conditions. Nanostructured titania:carbon black hybrid thin films are investigated for their stability against increased relative humidity and light irradiation. These thin films are created using water-based, environmentally friendly production and further emphasize scalability by using slot-die coating as a deposition technique. The thermoelectric performance during operation is correlated with morphological changes, by simultaneously measuring operando grazing incidence small-angle X-ray scattering and Seebeck coefficient. The thin films are stable against light degradation. There are neither morphological changes nor changes in the Seebeck coefficient during five hours of operation. However, they show a significant decrease in performance due to elevated moisture. This humidity degradation is also visible in the morphology of the samples and corresponds well with decreases in the Seebeck coefficient. Using the ionic liquid 1-ethyl-3-methylimidazolium dicyanamide post-treatment is found to both increase the Seebeck coefficient and the stability against elevated relative humidities. Therefore, the moisture sensitivity of titania:carbon black thin hybrid films can be overcome with such a simple treatment, which renders our approach a promising first step toward sustainable thermoelectric thin films.</p>","PeriodicalId":29794,"journal":{"name":"Advanced Energy and Sustainability Research","volume":"7 3","pages":""},"PeriodicalIF":5.7,"publicationDate":"2026-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aesr.202500347","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147564374","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}