In this work, SnO2 nanoparticles (SnO2 NPs) were synthesised using a leaf extract from Shorea robusta. The synthetic method was found to be reliable, cost-effective, and efficient. The synthesised SnO2 NPs have been incorporated with copper (Cu) and used as an electrode material for supercapacitors (SCs). The potential of SnO2 and its nanocomposite for SCs was investigated using various electrochemical parameters. At a current density of 2 A/g, the maximum specific capacitance of SnO2@Cu-A, SnO2@Cu-B, and SnO2@Cu-C was found to be 220, 226, and 300 F/g. The maximum energy density of 11.1 Wh/kg for SnO2@Cu-C has been evaluated at a power density of 1021.3 W/kg. After 5000 GCD cycles, a retention of 96.8% was found for SnO2@Cu-C. Under two electrode systems, a retention of 95.4% was found for SnO2@Cu-C.
{"title":"Electrochemical performance of SnO2 after blending with Cu","authors":"Naveen Chandra Joshi, Prateek Gururani, Niraj Kumar","doi":"10.1007/s11581-024-05742-8","DOIUrl":"https://doi.org/10.1007/s11581-024-05742-8","url":null,"abstract":"<p>In this work, SnO<sub>2</sub> nanoparticles (SnO<sub>2</sub> NPs) were synthesised using a leaf extract from <i>Shorea robusta</i>. The synthetic method was found to be reliable, cost-effective, and efficient. The synthesised SnO<sub>2</sub> NPs have been incorporated with copper (Cu) and used as an electrode material for supercapacitors (SCs). The potential of SnO<sub>2</sub> and its nanocomposite for SCs was investigated using various electrochemical parameters. At a current density of 2 A/g, the maximum specific capacitance of SnO<sub>2</sub>@Cu-A, SnO<sub>2</sub>@Cu-B, and SnO<sub>2</sub>@Cu-C was found to be 220, 226, and 300 F/g. The maximum energy density of 11.1 Wh/kg for SnO<sub>2</sub>@Cu-C has been evaluated at a power density of 1021.3 W/kg. After 5000 GCD cycles, a retention of 96.8% was found for SnO<sub>2</sub>@Cu-C. Under two electrode systems, a retention of 95.4% was found for SnO<sub>2</sub>@Cu-C.</p>","PeriodicalId":599,"journal":{"name":"Ionics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-31DOI: 10.1007/s11581-024-05738-4
Vijaya B, Usha Rani M
Energy storage devices play a crucial role in all kinds of electronic devices. Rechargeable lithium-ion batteries have run across problems such as energy density, toughness, and safety. In order to conquer these hindrances, in this work, a novel solid-state polymer electrolyte for lithium-ion batteries was synthesized by blending polymethyl methacrylate (PMMA) in poly (vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) with constant weight percent of ethylene carbonate (EC) and lithium bis (trifluoro methane sulfonyl) imide (LiTFSI), and different concentrations of calcium oxide (CaO). The composite polymer electrolytes (CPEs) (PVdF-HFP:PMMA:LiTFSI:EC:CaO) were fabricated using the solution casting technique. Powder XRD reveals enhancement in intensity with increasing CaO content. FTIR shows the interaction between the polymer-salt matrix. Among the analyzed films, PVdF-HFP:PMMA:LiTFSI:EC:CaO (10 wt.%) exhibits high ionic conductivity (10–4 S/cm) and good electrochemical (4 V) and thermal stability (350℃) which makes it suitable for solid-state electrolyte as a separator in energy storage applications.
Graphical Abstract
储能设备在各种电子设备中发挥着至关重要的作用。可充电锂离子电池一直面临着能量密度、韧性和安全性等问题。为了克服这些问题,本研究通过在聚(偏氟乙烯-共六氟丙烯)(PVdF-HFP)中混入聚甲基丙烯酸甲酯(PMMA)、恒定重量百分比的碳酸乙烯(EC)和双(三氟甲烷磺酰)亚胺锂(LiTFSI)以及不同浓度的氧化钙(CaO),合成了一种用于锂离子电池的新型固态聚合物电解质。复合聚合物电解质(CPEs)(PVdF-HFP:PMMA:LiTFSI:EC:CaO)是利用溶液浇铸技术制造的。粉末 XRD 显示,随着 CaO 含量的增加,其强度也在增强。傅立叶变换红外光谱显示了聚合物-盐基质之间的相互作用。在分析的薄膜中,PVdF-HFP:PMMA:LiTFSI:EC:CaO(10 wt.%)具有较高的离子电导率(10-4 S/cm)、良好的电化学稳定性(4 V)和热稳定性(350℃),因此适合用作储能应用中的固态电解质分离器。
{"title":"A free-standing CaO infused PVdF-HFP/PMMA polymer-nanocomposite as solid-state electrolytes for energy storage applications","authors":"Vijaya B, Usha Rani M","doi":"10.1007/s11581-024-05738-4","DOIUrl":"https://doi.org/10.1007/s11581-024-05738-4","url":null,"abstract":"<p>Energy storage devices play a crucial role in all kinds of electronic devices. Rechargeable lithium-ion batteries have run across problems such as energy density, toughness, and safety. In order to conquer these hindrances, in this work, a novel solid-state polymer electrolyte for lithium-ion batteries was synthesized by blending polymethyl methacrylate (PMMA) in poly (vinylidene fluoride-co-hexafluoropropylene) (PVdF-HFP) with constant weight percent of ethylene carbonate (EC) and lithium bis (trifluoro methane sulfonyl) imide (LiTFSI), and different concentrations of calcium oxide (CaO). The composite polymer electrolytes (CPEs) (PVdF-HFP:PMMA:LiTFSI:EC:CaO) were fabricated using the solution casting technique. Powder XRD reveals enhancement in intensity with increasing CaO content. FTIR shows the interaction between the polymer-salt matrix. Among the analyzed films, PVdF-HFP:PMMA:LiTFSI:EC:CaO (10 wt.%) exhibits high ionic conductivity (10<sup>–4</sup> S/cm) and good electrochemical (4 V) and thermal stability (350℃) which makes it suitable for solid-state electrolyte as a separator in energy storage applications.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>","PeriodicalId":599,"journal":{"name":"Ionics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-31DOI: 10.1007/s11581-024-05741-9
Yijian Liu, Lang Gan
Introducing oxygenated species into carbon-based catalysts is an efficient method to enhance the activity of electrochemical hydrogen peroxide (H2O2) production. Here, we report a low-temperature plasma strategy for preparing carbon materials rich in epoxy groups. This catalyst exhibits effective electrocatalytic activity, achieving H2O2 selectivity over 90% and a Faraday efficiency of 94.9% after 12 h of constant H2O2 production. The exceptional electrochemical activity is attributed to the epoxy group species, which are formed through the reaction between carbon defects and oxygen. This work offers an effective approach for preparing carbon-based catalysts for H2O2 production and provides insights into the impact of oxygenated species on the activity for H2O2 generation.
{"title":"Efficient electrochemical hydrogen peroxide production enabled by defect engineering of epoxy-rich carbon materials","authors":"Yijian Liu, Lang Gan","doi":"10.1007/s11581-024-05741-9","DOIUrl":"https://doi.org/10.1007/s11581-024-05741-9","url":null,"abstract":"<p>Introducing oxygenated species into carbon-based catalysts is an efficient method to enhance the activity of electrochemical hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) production. Here, we report a low-temperature plasma strategy for preparing carbon materials rich in epoxy groups. This catalyst exhibits effective electrocatalytic activity, achieving H<sub>2</sub>O<sub>2</sub> selectivity over 90% and a Faraday efficiency of 94.9% after 12 h of constant H<sub>2</sub>O<sub>2</sub> production. The exceptional electrochemical activity is attributed to the epoxy group species, which are formed through the reaction between carbon defects and oxygen. This work offers an effective approach for preparing carbon-based catalysts for H<sub>2</sub>O<sub>2</sub> production and provides insights into the impact of oxygenated species on the activity for H<sub>2</sub>O<sub>2</sub> generation.</p>","PeriodicalId":599,"journal":{"name":"Ionics","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141872545","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-07-30DOI: 10.1007/s11581-024-05727-7
Mohit Sahni, Ankit Kumar, Pankaj Gupta, Azmat Ali Khan, Abhilasha Singh Mathuriya, Soumya Pandit, Kuldeep Sharma, Amit Roy, Nishant Ranjan, M. Z. A. Yahya, I. M. Noor
Bringing microbial fuel cells (MFCs) to market requires the use of non-precious metal catalysts. Therefore, we replaced the platinum (Pt) cathode with more cost-effective cadmium gallate (CdGa2O4) nanoparticles in the present research. The synthesis and characterization of cadmium gallate (CdGa2O4), and further its application as a cathode catalyst for oxygen reduction reaction (ORR) in a MFC. The physiochemical characterization indicates a high ORR property of CdGa2O4, attributed to the presence of active sites, high electronic conductivity, and high surface area. These features enhanced the bioelectricity production with simultaneous wastewater treatment which resulted into comparable performances to catalysts such as platinum (Pt). The electrochemical analysis shows that the loading rate of CdGa2O4 has a significant impact on the power output of the MFC. The highest volumetric power density was observed in CdGa2O4 with a loading of 1 mg/cm3 (8.2 W/m3). COD removal efficiency also showed a similar trend with respect to different loading rates. 1 mg/cm3 of CdGa2O4 showed the highest COD removal and Columbic efficiency of 83.8% and 11.7%, respectively. The low cost-to-performance ratio, high ORR activity, and high electric conductivity of CdGa2O4 prove that CdGa2O4 is a feasible substitute for Pt in large-scale operations of MFC.