Energy advances最新文献

{"title":"Double layer capacitance as a sensitive metric to monitor the formation of solid electrolyte interphases in Li–ion batteries†","authors":"Maximilian Schalenbach, Baolin Wu, Chih-Long Tsai, Anna Windmüller, Luc Raijmakers, Shicheng Yu, Hermann Tempel and Rüdiger-A. Eichel","doi":"10.1039/D4YA00524D","DOIUrl":"https://doi.org/10.1039/D4YA00524D","url":null,"abstract":"<p >In Li–ion batteries with conventional liquid electrolytes, the formation of solid electrolyte interphases (SEIs) at carbonaceous anodes prevents continuous electrochemical decomposition of the electrolyte. Typically, SEI formation and electrolyte decomposition are examined with linear potential scans, where time and potential dependencies are intertwined. Herein, a stepwise potential variation in combination with amperometry and electrochemical impedance spectroscopy (EIS) is used to characterize the impacts of time and potential as individual degrees of freedom on the SEI formation. Based on EIS data, the double layer capacitance (DLC) is introduced as a sensitive <em>in situ</em> metric to monitor the SEI formation. This technique is used to show the similarities and differences in the SEI formation processes with typical Li–ion battery electrolytes consisting of hexafluorophosphate and carbonate solvents. A polished glassy carbon electrode is employed to provide model-like EIS data with reliable interpretation. Changes in the electrochemical interface within only few atomic layers are tracked with DLC, indicating that SEIs are formed below 1.9 V <em>vs.</em> Li/Li<small>⁺</small> with the employed electrolytes. Amperometry measurements show that the decomposition of the employed electrolytes starts at approximately 2.7 V <em>vs.</em> Li/Li<small>⁺</small>, displaying smaller electrochemical windows than those previously reported.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 1","pages":" 140-151"},"PeriodicalIF":3.2,"publicationDate":"2024-10-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2025/ya/d4ya00524d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142994079","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":"Characterization of n-doped branches in nanotree LEDs†","authors":"Kristi Adham, Yue Zhao, Pyry Kivisaari and Magnus T. Borgström","doi":"10.1039/D4YA00414K","DOIUrl":"https://doi.org/10.1039/D4YA00414K","url":null,"abstract":"<p >We present processed light emitting diodes (LED) devices based on GaInP core-branch nanowire (NW) structures. The LEDs rely on the charge carrier diffusion induced light emitting diode concept. The GaInP core has a higher Ga content than the branches to induce diffusion of carriers from the cores into the branches. The branches play the role of the active region in the structure, where charge carriers recombine to emit light. We investigate the impact of n-doping the branches on the performance of the LEDs. Electroluminescence measurements provide insights on the emission spectrum with varying dopant molar fraction. External quantum efficiency (EQE) measurements provide insights into the device quality, and reveal the limitations encountered in processing, such as the high sheet resistance of the indium tin oxide (ITO) transparent conductive top contact. Temperature dependent measurements allow us to probe the effect of contact resistance by measuring the <em>I</em>–<em>V</em> curve as a function of temperature. The work identifies performance limitations and paths to overcome them.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 12","pages":" 2922-2928"},"PeriodicalIF":3.2,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00414k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142777999","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":"Organometallic synthesis of a high-density Pt single atom catalyst on nickel for the alkaline hydrogen evolution reaction†","authors":"Vineesh Thazhe Veettil, Manoj Shanmugasundaram and David Zitoun","doi":"10.1039/D4YA00398E","DOIUrl":"https://doi.org/10.1039/D4YA00398E","url":null,"abstract":"<p >Single atom platinum catalysts, characterized by isolated Pt atoms dispersed on suitable supports, exhibit high hydrogen evolution catalytic mass activity. The activity is usually limited by the low density of Pt atoms on the substrate. Herein, we report on a single step synthesis of a catalyst from organometallic precursors of Ni and Pt which yields a high density of Pt atoms on Ni nanoparticles dispersed on a carbon support. The spontaneous formation of Pt single atoms on the surface of Ni has not been reported in a single step reaction and is a unique feature of the organometallic route. This route allowed us to increase the atomic ratio of single Pt atoms to Ni up to 10% compared to 2% reported previously. Single Pt atoms on Ni catalysts display a high hydrogen evolution reaction activity of 660 mA mg<small>_Pt</small><small>⁻¹</small> (8 times more than that of commercial Pt) and stability as HER catalysts compared with commercial Pt/C catalysts.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 12","pages":" 2896-2902"},"PeriodicalIF":3.2,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00398e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778045","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":"n-Doping of bio-inspired electron transporting materials: the influence of charge-transfer complexation†","authors":"Wai Kin Yiu, Dylan Wilkinson, Michele Cariello, Marcin Giza, Namrata Pant, Nabeel Mohammed, Benjamin Vella, Stephen Sproules, Graeme Cooke and Pablo Docampo","doi":"10.1039/D4YA00369A","DOIUrl":"https://doi.org/10.1039/D4YA00369A","url":null,"abstract":"<p >Interest in sustainable and bio-inspired materials for optoelectronic applications is burgeoning, driven by the prospect of greener production, compatibility with large-scale manufacturing and potential biocompatibility. This study introduces two analogues of the biological redox co-factor flavin (<strong>BFG</strong>, <strong>BFA</strong>) as bioinspired electron-transporting materials featuring solubilizing ethylene glycol and alkyl side chains. These materials demonstrated a conductivity of ∼5.6 × 10<small>⁻⁷</small> S cm<small>⁻¹</small> in their pristine form which compares favourably with widely employed <strong>PCBM</strong> (6.8 × 10<small>⁻⁸</small> S cm<small>⁻¹</small>). To enhance the conductivity of the material the chemical dopant <strong>N-DMBI</strong> was added. UV-vis absorption and electron spin resonance measurements confirmed radical anion formation, while glycol-functionalized derivative <strong>BFG</strong> shows faster reactivity toward the dopant due to increased polarity of the acceptor molecule conferred by the more polar side chain. Surprisingly, these materials did not exhibit the expected enhancement effect in terms of conductivity or increased power conversion efficiency in perovskite solar cells. DFT calculations correlated to features in the absorption spectra of the compounds indicates the formation of stable charge-transfer complexes upon the addition of the dopant. We hypothesise that this inhibits electron transfer of the reduced species in the film to its undoped neighbour and thereby prevents effective doping. Our results highlight the significance of charge-transfer complexation in the design of future electron transporting materials for perovskite solar cells and advocates the use of low cost DFT modelling early on in the design of these species and their dopants.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 12","pages":" 2939-2946"},"PeriodicalIF":3.2,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00369a?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778029","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":"Self-powered graphene-based composites for rain energy harvesting†","authors":"Yi Zheng, Hongyu Zheng, Yuanchong Yue, Liying Lu, Yingli Wang and Qunwei Tang","doi":"10.1039/D4YA00479E","DOIUrl":"https://doi.org/10.1039/D4YA00479E","url":null,"abstract":"<p >Harnessing waste green energy utilizing advanced energy conversion technologies is widely considered a promising avenue for enhancing the power generation capacity of renewable energy. In this study, we present the experimental realization of a tailored energy conversion device using graphene-carbon black/polyvinyl chloride (G-CB/PVC) composite films for the innovative harvesting of rainwater energy. Based on the cyclic charge–discharge behaviors of electron/cationic pseudocapacitance at the film–raindrop interface, periodic current and voltage signals were generated with maximum values exceeding 2.5 μA and 100 μV per droplet by optimizing the concentrations and species of cations, respectively. Electricity outputs were significantly enhanced by increasing the electron concentration in the composite films. It is noteworthy that rainwater energy-harvesting devices exhibit exceptional long-term stability, enduring persistent attacks posed by continuous simulated rainfall conditions.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 12","pages":" 2929-2938"},"PeriodicalIF":3.2,"publicationDate":"2024-10-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00479e?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778000","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":"Zinc–iron (Zn–Fe) redox flow battery single to stack cells: a futuristic solution for high energy storage off-grid applications","authors":"Mani Ulaganathan","doi":"10.1039/D4YA00358F","DOIUrl":"https://doi.org/10.1039/D4YA00358F","url":null,"abstract":"<p >The decoupling nature of energy and power of redox flow batteries makes them an efficient energy storage solution for sustainable off-grid applications. Recently, aqueous zinc–iron redox flow batteries have received great interest due to their eco-friendliness, cost-effectiveness, non-toxicity, and abundance. However, the development of zinc–iron redox flow batteries (RFBs) remains challenging due to severe inherent difficulties such as zinc dendrites, iron(<small>III</small>) hydrolysis, ion-crossover, hydrogen evolution reactions (HER), and expensive membranes which hinder commercialization. Many scientific initiatives have been commenced in the past few years to address these primary difficulties, paving the way for high-performance zinc–iron (Zn–Fe) RFBs. This review collectively presents the various aspects of the Zn–Fe RFB including the basic electrochemical cell chemistry of the anolyte and catholyte, and the different approaches considered for electrodes, electrolytes, membranes, and other cell components to overcome the above issues. This review summarizes the recent activities and viewpoints for obtaining high-performance Zn-Fe RFBs.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 12","pages":" 2861-2876"},"PeriodicalIF":3.2,"publicationDate":"2024-10-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00358f?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778042","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":"Solvent assisted shape dependent MAPbI3/polyfluorene heterostructures with a larger surface area for improved photocatalytic H2 evolution†","authors":"Tamal Pal, Soumalya Bhowmik, Arvin Sain Tanwar, Ameer Suhail, Nageswara Rao Peela, Chivukula V. Sastri and Parameswar Krishnan Iyer","doi":"10.1039/D4YA00457D","DOIUrl":"https://doi.org/10.1039/D4YA00457D","url":null,"abstract":"<p >Although lead based MAPbI<small>₃</small> has been used as a material for photocatalytic hydrogen evolution, conventionally synthesized MAPbI<small>₃</small> in HI solution suffers from very low HER activity with a hydrogen evolution rate of 30 μmol h<small>⁻¹</small> g<small>⁻¹</small>. Several efforts have been made to boost the HER performance by tagging a co-catalyst. But no such significant approach was developed to improve the HER activity of pristine MAPbI<small>₃</small>. In this work, the shape and morphology of MAPbI<small>₃</small> have been modified by a simple solvent change route. This led to substantial transformation in shape and morphology affecting various facets of photocatalytic and photoelectrochemical performance. DMF assisted pristine MAPbI<small>₃</small> exhibited an HER activity of 830 μmol h<small>⁻¹</small> g<small>⁻¹</small>, almost 28-fold better than that of typical HI based MAPbI<small>₃</small>. This work highlights how solvent transition from HI to DMF can influence the shape and surface morphologies which impact the photocatalytic and photoelectrochemical performances of pristine MAPbI<small>₃</small>. To further enhance the HER activity of DMF assisted MAPbI<small>₃</small>, the as-synthesized polyfluorene co-catalyst was integrated on the MAPbI<small>₃</small> surface. Under optimized conditions, the hydrogen evolution of MAPbI<small>₃</small>/polyfluorene composites can reach up to 6200 μmol h<small>⁻¹</small> g<small>⁻¹</small>.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 12","pages":" 2965-2971"},"PeriodicalIF":3.2,"publicationDate":"2024-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00457d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778031","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":"Evaluation of the electrochemical energy storage performance of symmetric supercapacitor devices based on eco-friendly synthesized nitrogen-doped graphene-like derivative electrodes from the perspective of their nanostructural characteristics†","authors":"Marwa A. A. Mohamed, Marwa Adel and Jehan El Nady","doi":"10.1039/D4YA00526K","DOIUrl":"https://doi.org/10.1039/D4YA00526K","url":null,"abstract":"<p >The potential use of several ecofriendly nitrogen-doped 2D graphene-like derivatives (N-2D GDs) with various graphitic structural features as electrode materials for symmetric 2-electrode supercapacitor devices was explored. The N-2D GDs were synthesized <em>via</em> a novel, facile, ecofriendly, economic and scalable technique. The synthesis technique is simply a single-step hydrothermal treatment of glucose using traces of cetyltrimethylammonium bromide (CTAB) and ammonia as structure-directing agents. Graphitic structural characteristics were controlled by manipulating hydrothermal process temperature and CTAB dose. Electrochemical energy storage performance was found to be strongly dependent on the oxidation level, doped-N content and configuration, density of graphitic surface-capping by CTAB, morphological architecture and graphitic structural order of N-2D GD-based electrodes. Interestingly, such graphitic structural parameters influenced overall charge-storage capacitance through EDLC and pseudocapacitance mechanisms in a competitive manner. An N-2D GD sample synthesized at a hydrothermal temperature of 270 °C and CTAB/glucose molar ratio of 1/6 (NG-HCD270) exhibited the best energy storage capacitive performance in a symmetric 2-electrode supercapacitor system owing to the almost pure well-ordered N-doped graphene. It showed excellent electrochemical energy storage performance as compared to other 2D graphene derivatives reported in the literature synthesized <em>via</em> toxic conventional methods, with a specific capacitance of 553 F g<small>⁻¹</small>, energy density of 84.5 W h kg<small>⁻¹</small>, power density of 550.2 W kg<small>⁻¹</small> and 88.5% capacitance retention after 5000 cycles. Thus, the NG-HCD270 graphitic sample can be considered a promising ecofriendly and cost-effective electrode material for high-performance supercapacitors, which can benefit the substantial development of electrical energy storage industry and, hence, electrical power production from renewable energy sources at competitive costs.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 12","pages":" 2947-2964"},"PeriodicalIF":3.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00526k?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778030","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":"Unlocking the potential of Ti3C2 electrodes: a data-driven capacitance prediction study†","authors":"Sanjith Krishna and Afkham Mir","doi":"10.1039/D4YA00460D","DOIUrl":"https://doi.org/10.1039/D4YA00460D","url":null,"abstract":"<p >In the dynamic realm of energy storage devices, supercapacitors (SCs) stand out as promising options. Among the various materials considered for SC electrodes, layered substances like Ti<small>₃</small>C<small>₂</small> have drawn attention due to their outstanding electrochemical qualities, especially their impressive volumetric capacitance. This study focuses on assessing the predictive abilities of three machine learning models: Bayesian ridge regression (BRR), K-nearest neighbors (KNN), and artificial neural network (ANN) in estimating specific capacitance in Ti<small>₃</small>C<small>₂</small>-based supercapacitors. BRR offered reliable predictions with an <em>R</em>-squared (<em>R</em><small>²</small>) value of 0.759 and a low root mean square error (RMSE) of 0.074. KNN excelled in predicting supercapacitor performance with an impressive <em>R</em><small>²</small> of 0.928 and a minimal RMSE of 0.040. However, the ANN model stood out as it could reveal the significance of various inputs much like the human brain's intricate functioning. It achieved a high <em>R</em><small>²</small> of 0.8929 with a low RMSE of 0.0493, demonstrating its proficiency in capturing complex relationships in the dataset. The precise tuning of hyperparameters further enhanced its accuracy. The use of SHAP (SHapley Additive exPlanations) values emphasized cation mobility, and scan rates as key contributing factors. These findings provide a strong foundation for utilizing machine learning to predict specific capacitance in Ti<small>₃</small>C<small>₂</small>-based supercapacitors. Researchers can benefit from these versatile tools for precise predictions, facilitating systematic supercapacitor design and enhancing our understanding of electrode materials.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 12","pages":" 2986-2998"},"PeriodicalIF":3.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00460d?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142778033","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":"Fabrication methods, pseudocapacitance characteristics, and integration of conjugated conducting polymers in electrochemical energy storage devices","authors":"Meysam Heydari Gharahcheshmeh and Kafil Chowdhury","doi":"10.1039/D4YA00504J","DOIUrl":"https://doi.org/10.1039/D4YA00504J","url":null,"abstract":"<p >Among the diverse range of modern renewable energy storage technologies, electrochemical energy storage devices have been rapidly adopted across various applications owing to their superior characteristics, including high coulombic efficiency, elevated energy and power densities, scalability, modularity, and rapid response capabilities. Conjugated conducting polymers have recently attracted significant attention in electrochemical energy storage devices due to their unique pseudocapacitive behavior, hybrid ionic/electronic conduction, rapid doping/de-doping dynamics, bulk intercalation of ionic species, high specific capacity, and exceptional structural and thermal stability. Conducting polymers exhibit pseudocapacitance through reversible redox reactions coupled with doping/de-doping processes, facilitating the movement of counterion dopants and ionic species between the polymer matrix and the electrolyte. The size and nature of counterion dopants significantly influence the electrochemical performance of these polymers. Small counterion dopants like chloride enhance redox exchange with the electrolyte and broaden the electrochemical potential window, which is advantageous for electrochemical energy storage devices. The pseudocapacitive properties can be further enhanced by increasing the semi-crystalline characteristics and attaining longer polymer chains. This review article focuses on the fabrication methods, fundamental aspects of ionic and electrical conductivity, and pseudocapacitance characteristics of conjugated conducting polymers, as well as their applications in Li–ion batteries, supercapacitors, and redox flow batteries.</p>","PeriodicalId":72913,"journal":{"name":"Energy advances","volume":" 11","pages":" 2668-2703"},"PeriodicalIF":3.2,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.rsc.org/en/content/articlepdf/2024/ya/d4ya00504j?page=search","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142595185","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}