Ammonia nitrogen and nitrate nitrogen pollution in aquaculture effluent have been demonstrated to pose significant threats to aquatic environmental health. This work constructed a biomimetic artificial enzyme (hemin chloride)-BiVO4 homojunction photocatalytic synergistic system via solvothermal synthesis. This system activates a Fenton-like reaction, achieving highly efficient simultaneous removal of ammonia nitrogen and nitrate nitrogen under slightly alkaline conditions. This overcomes the drawback of conventional photocatalytic ammonia nitrogen removal requiring alkaline reaction conditions. Experimental results demonstrate superior removal performance for the composite material HBB. At pH 8.0, HBB-2 achieved simultaneous removal rates of 75.7% for ammonia nitrogen and 70.3% for nitrate nitrogen after 100 min. Furthermore, the redox role of reactive oxygen species and electrons in the removal of nitrogen pollutants as well as the removal mechanism were proposed by free radical scavenging experiments. Notably, loading the artificial enzyme onto the homojunction BiVO4 photocatalyst broadened its visible light response range while imparting excellent mechanical stability, maintaining outstanding removal capacity after 10 cycles. In summary, the artificial enzyme-homojunction composite system offers a viable approach for developing photocatalysts capable of simultaneously removing ammonia nitrogen and nitrate nitrogen under slightly alkaline conditions, providing valuable insights for effluent purification in aquaculture.
{"title":"Biomimetic artificial enzyme-BiVO4 homojunction photocatalyst for simultaneous removal of nitrogen pollution in slightly alkaline conditions: Synergy of fenton-like effect and electron shuttle function","authors":"Huining Zhang, Yue Zhang, Yang Cao, Jianping Han, Zongqian Zhang, Yankui Xiao, Zhiqiang Wei, Zhiguo Wu","doi":"10.1016/j.apsusc.2026.166259","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.166259","url":null,"abstract":"Ammonia nitrogen and nitrate nitrogen pollution in aquaculture effluent have been demonstrated to pose significant threats to aquatic environmental health. This work constructed a biomimetic artificial enzyme (hemin chloride)-BiVO<sub>4</sub> homojunction photocatalytic synergistic system via solvothermal synthesis. This system activates a Fenton-like reaction, achieving highly efficient simultaneous removal of ammonia nitrogen and nitrate nitrogen under slightly alkaline conditions. This overcomes the drawback of conventional photocatalytic ammonia nitrogen removal requiring alkaline reaction conditions. Experimental results demonstrate superior removal performance for the composite material HBB. At pH 8.0, HBB-2 achieved simultaneous removal rates of 75.7% for ammonia nitrogen and 70.3% for nitrate nitrogen after 100 min. Furthermore, the redox role of reactive oxygen species and electrons in the removal of nitrogen pollutants as well as the removal mechanism were proposed by free radical scavenging experiments. Notably, loading the artificial enzyme onto the homojunction BiVO<sub>4</sub> photocatalyst broadened its visible light response range while imparting excellent mechanical stability, maintaining outstanding removal capacity after 10 cycles. In summary, the artificial enzyme-homojunction composite system offers a viable approach for developing photocatalysts capable of simultaneously removing ammonia nitrogen and nitrate nitrogen under slightly alkaline conditions, providing valuable insights for effluent purification in aquaculture.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"30 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-08DOI: 10.1016/j.apsusc.2026.166249
Huan Li, Chen Wen, Liwen Yang, Guobao Xu
Although Polymer electrolyte (PEO)-based composite solid electrolyte (CSE) has attracted significant attention, it still suffers from low lithium ion migration and interfacial compatibility. Herein, we prepared functionalized multi-walled carbon nanotubes (FCNTs) via nitric acid oxidation and subsequently incorporated them into PEO matrix to fabricate CSEs (FCNTs-PEO). The introduced hydroxyl and carboxyl groups formed hydrogen bonds with the ether oxygen (EO) units of PEO chains, disrupting the ordered packing of polymer segments, increasing the amorphous fraction, and facilitating Li+ migration. Additionally, acid etching generated jagged edge structures on the nanotube surfaces with localized π-electron states, which effectively weaken the electrostatic interaction between Li+ and TFSI-, thereby promoting the dissociation of the lithium salt. Experimental results demonstrate that 3 wt% FCNTs-PEO electrolyte achieves an ionic conductivity of 5.24 × 10-4 S cm−1 at 60 °C. Moreover, the LiFePO4 (LFP)||FCNTs-PEO||Li cells deliver the superior electrochemical performance of 79% and 72.5% capacity retention over 450 and 800 cycles at 2C and 0.5C, respectively.
聚合物电解质（PEO）基复合固体电解质（CSE）虽然受到广泛关注，但仍存在锂离子迁移和界面相容性差的问题。本研究通过硝酸氧化法制备功能化多壁碳纳米管（FCNTs），并将其掺入PEO基体中制备CSEs （FCNTs-PEO）。引入的羟基和羧基与PEO链的醚氧（EO）单元形成氢键，破坏了聚合物段的有序堆积，增加了非晶态部分，促进了Li+的迁移。此外，酸蚀在纳米管表面产生了具有局域π电子态的锯齿状边缘结构，有效地削弱了Li+与TFSI-之间的静电相互作用，从而促进了锂盐的解离。实验结果表明，3 wt% FCNTs-PEO电解质在60 °C时的离子电导率为5.24 × 10-4 S cm−1。此外，LiFePO4 (LFP)||FCNTs-PEO||锂电池在2C和0.5C下分别在450和800次循环中提供了79%和72.5%的优异电化学性能。
{"title":"Synergistical defect effects and hydrogen bond of carbon nanotubes improving electrochemical performance of PEO‐based lithium metal batteries","authors":"Huan Li, Chen Wen, Liwen Yang, Guobao Xu","doi":"10.1016/j.apsusc.2026.166249","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.166249","url":null,"abstract":"Although Polymer electrolyte (PEO)-based composite solid electrolyte (CSE) has attracted significant attention, it still suffers from low lithium ion migration and interfacial compatibility. Herein, we prepared functionalized multi-walled carbon nanotubes (FCNTs) via nitric acid oxidation and subsequently incorporated them into PEO matrix to fabricate CSEs (FCNTs-PEO). The introduced hydroxyl and carboxyl groups formed hydrogen bonds with the ether oxygen (EO) units of PEO chains, disrupting the ordered packing of polymer segments, increasing the amorphous fraction, and facilitating Li<sup>+</sup> migration. Additionally, acid etching generated jagged edge structures on the nanotube surfaces with localized π-electron states, which effectively weaken the electrostatic interaction between Li<sup>+</sup> and TFSI<sup>-</sup>, thereby promoting the dissociation of the lithium salt. Experimental results demonstrate that 3 wt% FCNTs-PEO electrolyte achieves an ionic conductivity of 5.24 × 10<sup>-4</sup> S cm<sup>−1</sup> at 60 °C. Moreover, the LiFePO<sub>4</sub> (LFP)||FCNTs-PEO||Li cells deliver the superior electrochemical performance of 79% and 72.5% capacity retention over 450 and 800 cycles at 2C and 0.5C, respectively.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"34 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146134582","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
High‑performance β-Ga2O3/Si heterointerfaces are crucial for next‑generation power and optoelectronic devices, yet their thermal stability and interfacial thermal transport remain challenging due to lattice mismatch and thermal expansion mismatch. Herein, we fabricated β-Ga2O3(1 0 0)/Si heterointerface by surface-activated bonding and investigated the annealing-induced evolution of interfacial microstructures and their regulatory effects on interfacial thermal transport properties. A 16.2 nm-thick interlayer consisting of amorphous Si and Fe forms at the as-bonded heterointerface, while annealing at 1000 °C reduces its thickness to 4.3 nm and eliminates the characteristic signal of concentrated Fe. Molecular dynamics simulations indicate that these amorphous interlayers degrade interfacial thermal transport properties, with interfacial thermal conductance (ITC) decreasing as amorphous Si layer thickness and Fe atomic fraction increase. Amorphous Si reduces the ITC by 24% relative to the ideal interface, while Fe doping can further decrease the value by 29.5%. This work reveals the critical role of interfacial microstructures and elemental distributions in regulating interfacial thermal properties, and provides a theoretical basis for optimizing bonding processes and thermal management strategies.
{"title":"Surface activated bonding of (100)-β-Ga2O3 and Si: Annealing-induced evolution of interfacial microstructure and its effects on thermal transport","authors":"Yongfeng Qu, Wenbo Hu, Fei Wang, Boquan Ren, Hongxing Wang, Jijun Ding, Haixia Chen","doi":"10.1016/j.apsusc.2026.166258","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.166258","url":null,"abstract":"High‑performance β-Ga<sub>2</sub>O<sub>3</sub>/Si heterointerfaces are crucial for next‑generation power and optoelectronic devices, yet their thermal stability and interfacial thermal transport remain challenging due to lattice mismatch and thermal expansion mismatch. Herein, we fabricated β-Ga<sub>2</sub>O<sub>3</sub>(1<!-- --> <!-- -->0<!-- --> <!-- -->0)/Si heterointerface by surface-activated bonding and investigated the annealing-induced evolution of interfacial microstructures and their regulatory effects on interfacial thermal transport properties. A 16.2 nm-thick interlayer consisting of amorphous Si and Fe forms at the as-bonded heterointerface, while annealing at 1000 °C reduces its thickness to 4.3 nm and eliminates the characteristic signal of concentrated Fe. Molecular dynamics simulations indicate that these amorphous interlayers degrade interfacial thermal transport properties, with interfacial thermal conductance (ITC) decreasing as amorphous Si layer thickness and Fe atomic fraction increase. Amorphous Si reduces the ITC by 24% relative to the ideal interface, while Fe doping can further decrease the value by 29.5%. This work reveals the critical role of interfacial microstructures and elemental distributions in regulating interfacial thermal properties, and provides a theoretical basis for optimizing bonding processes and thermal management strategies.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"30 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138490","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Aramid fiber, as a new generation of synthetic fiber material, has excellent insulation and mechanical properties and is widely used in high-voltage power transmission and transformation equipment. However, the problems of smooth surface and low chemical reactivity seriously restrict the combination with polymers and reduce the withstand voltage characteristics of insulation devices. Hence, this paper proposes to use aramid nanofibers (ANFs) obtained through nanofibrillation treatment to regulate the surface roughness of aramid fibers. Meanwhile, polar functional groups were introduced during the deprotonation process, successfully constructing polar-nanofibrillation structures on the aramid fiber surface, further regulating the polarity of fiber surfaces. Through insulation performance tests and molecular dynamics simulations, the influence of polar functional group types on the insulation performance of aramid fiber-epoxy resin composites was revealed. The results show that the flashover voltage of the modified AFEP has increased by 58.01% and the breakdown field strength has increased by 56.52%. Analysis suggests that different polarity treatments have different mechanisms for enhancing insulation performance. Among them, the amino group is achieved by enhancing the interface bonding between aramid fibers and epoxy resin, while the fluorine-containing groups improve the material’s ability to control charge distribution.
{"title":"Enhancing the insulation performance of aramid fiber epoxy resin by constructing a polar-nanofibrillation structure on the fiber surface","authors":"Guowei Xia, Jun Xie, Qiqiang Chen, Qikai Wang, Chengming Hu, Zhaohua Zhang, Qing Xie","doi":"10.1016/j.apsusc.2026.166204","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.166204","url":null,"abstract":"Aramid fiber, as a new generation of synthetic fiber material, has excellent insulation and mechanical properties and is widely used in high-voltage power transmission and transformation equipment. However, the problems of smooth surface and low chemical reactivity seriously restrict the combination with polymers and reduce the withstand voltage characteristics of insulation devices. Hence, this paper proposes to use aramid nanofibers (ANFs) obtained through nanofibrillation treatment to regulate the surface roughness of aramid fibers. Meanwhile, polar functional groups were introduced during the deprotonation process, successfully constructing polar-nanofibrillation structures on the aramid fiber surface, further regulating the polarity of fiber surfaces. Through insulation performance tests and molecular dynamics simulations, the influence of polar functional group types on the insulation performance of aramid fiber-epoxy resin composites was revealed. The results show that the flashover voltage of the modified AFEP has increased by 58.01% and the breakdown field strength has increased by 56.52%. Analysis suggests that different polarity treatments have different mechanisms for enhancing insulation performance. Among them, the amino group is achieved by enhancing the interface bonding between aramid fibers and epoxy resin, while the fluorine-containing groups improve the material’s ability to control charge distribution.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"23 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-08DOI: 10.1016/j.apsusc.2026.166266
Yongmei Xia, Zuming He, Qimin Chen, Liheng Liu, Gang He, Juan Zhang, Xiangming Zeng, Jiangbin Su, Guihua Chen, Xiaofei Fu, Bin Tang, Guoliang Dai
{"title":"Ethanol-induced synthesis of vacancy-free cobalt-based Prussian blue analogues with a flaky surface as high-performance cathode materials for sodium-ion batteries","authors":"Yongmei Xia, Zuming He, Qimin Chen, Liheng Liu, Gang He, Juan Zhang, Xiangming Zeng, Jiangbin Su, Guihua Chen, Xiaofei Fu, Bin Tang, Guoliang Dai","doi":"10.1016/j.apsusc.2026.166266","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.166266","url":null,"abstract":"","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"94 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-08DOI: 10.1016/j.apsusc.2026.166254
Qijing Sun, Yiwei Gao, Wei Wang, Yang Song, Jingwang Lv, Guoyang Zhang, Li Liu, Mengwei He, Yanyun Zhao, Xiangjin Zhao
Metallic glasses (MGs) have emerged as promising catalysts for environmental remediation and electrocatalysis owing to their intrinsic disordered structure and metastable nature that favor abundant active sites. However, achieving precise tuning of their nanoscale structural configurations to optimize photocatalytic performance remains a key challenge. Herein, by tuning the sputtering-induced structural heterogeneity, we construct a loosely packed and heterogeneous atomic arrangement with enlarged, isotropic, and well-dispersed liquid-like regions (LLRs) for the magnetron-sputtered Cu50Zr50 MG catalysts. This unique nanoscale structure not only promotes the exposure of surface metallic Cu active sites but also optimizes the interfacial electron transfer. Consequently, the engineered Cu50Zr50 MG catalyst exhibits accelerated ultraviolet–visible photocatalytic degradation of azo dyes with the essential dye degradation ability () reaching ∼8.19 L m−2 min−1 and simultaneously improved oxygen/hydrogen evolution reaction (OER/HER) activity compared to the counterpart. This work first utilizes amplitude-modulation dynamic atomic force microscopy to reveal the direct structure-interface-activity relationship in MG catalysts and establishes nanoscale heterogeneity engineering as a simple yet effective approach to design high-performance MG-based catalysts for environmental remediation
金属玻璃由于其固有的无序结构和亚稳性质，有利于丰富的活性位点，在环境修复和电催化方面具有广阔的应用前景。然而，实现纳米级结构配置的精确调整以优化光催化性能仍然是一个关键的挑战。本文通过调整溅射诱导的结构非均质性，为磁控溅射Cu50Zr50 MG催化剂构建了具有扩大、各向同性和分散良好的液相区（LLRs）的松散堆积和非均质原子排列。这种独特的纳米级结构不仅促进了表面金属Cu活性位点的暴露，而且优化了界面电子转移。因此，设计的Cu50Zr50 MG催化剂对偶氮染料的紫外-可见光催化降解速度加快，基本染料降解能力（kSAkSA）达到~ 8.19 L m−2 min−1，同时氧/氢析出反应（OER/HER）活性也有所提高。这项工作首次利用调幅动态原子力显微镜揭示了MG催化剂的直接结构-界面-活性关系，并建立了纳米尺度的非均质工程作为设计高性能MG基催化剂用于环境修复的简单而有效的方法
{"title":"Nanoscale structural heterogeneity tuning of sputtered CuZr metallic glass for superior azo dye photocatalytic degradation","authors":"Qijing Sun, Yiwei Gao, Wei Wang, Yang Song, Jingwang Lv, Guoyang Zhang, Li Liu, Mengwei He, Yanyun Zhao, Xiangjin Zhao","doi":"10.1016/j.apsusc.2026.166254","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.166254","url":null,"abstract":"Metallic glasses (MGs) have emerged as promising catalysts for environmental remediation and electrocatalysis owing to their intrinsic disordered structure and metastable nature that favor abundant active sites. However, achieving precise tuning of their nanoscale structural configurations to optimize photocatalytic performance remains a key challenge. Herein, by tuning the sputtering-induced structural heterogeneity, we construct a loosely packed and heterogeneous atomic arrangement with enlarged, isotropic, and well-dispersed liquid-like regions (LLRs) for the magnetron-sputtered Cu<sub>50</sub>Zr<sub>50</sub> MG catalysts. This unique nanoscale structure not only promotes the exposure of surface metallic Cu active sites but also optimizes the interfacial electron transfer. Consequently, the engineered Cu<sub>50</sub>Zr<sub>50</sub> MG catalyst exhibits accelerated ultraviolet–visible photocatalytic degradation of azo dyes with the essential dye degradation ability (<span><span style=\"\"></span><span data-mathml='<math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub is=\"true\"><mi is=\"true\">k</mi><mrow is=\"true\"><mi mathvariant=\"italic\" is=\"true\">SA</mi></mrow></msub></math>' role=\"presentation\" style=\"font-size: 90%; display: inline-block; position: relative;\" tabindex=\"0\"><svg aria-hidden=\"true\" focusable=\"false\" height=\"2.317ex\" role=\"img\" style=\"vertical-align: -0.582ex;\" viewbox=\"0 -747.2 1586 997.6\" width=\"3.684ex\" xmlns:xlink=\"http://www.w3.org/1999/xlink\"><g fill=\"currentColor\" stroke=\"currentColor\" stroke-width=\"0\" transform=\"matrix(1 0 0 -1 0 0)\"><g is=\"true\"><g is=\"true\"><use xlink:href=\"#MJMATHI-6B\"></use></g><g is=\"true\" transform=\"translate(521,-163)\"><g is=\"true\"><use transform=\"scale(0.707)\" xlink:href=\"#MJMATHI-53\"></use><use transform=\"scale(0.707)\" x=\"613\" xlink:href=\"#MJMATHI-41\" y=\"0\"></use></g></g></g></g></svg><span role=\"presentation\"><math xmlns=\"http://www.w3.org/1998/Math/MathML\"><msub is=\"true\"><mi is=\"true\">k</mi><mrow is=\"true\"><mi is=\"true\" mathvariant=\"italic\">SA</mi></mrow></msub></math></span></span><script type=\"math/mml\"><math><msub is=\"true\"><mi is=\"true\">k</mi><mrow is=\"true\"><mi mathvariant=\"italic\" is=\"true\">SA</mi></mrow></msub></math></script></span>) reaching ∼8.19 L m<sup>−2</sup> min<sup>−1</sup> and simultaneously improved oxygen/hydrogen evolution reaction (OER/HER) activity compared to the counterpart. This work first utilizes amplitude-modulation dynamic atomic force microscopy to reveal the direct structure-interface-activity relationship in MG catalysts and establishes nanoscale heterogeneity engineering as a simple yet effective approach to design high-performance MG-based catalysts for environmental remediation","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"59 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-02-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146138496","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2026-02-07DOI: 10.1016/j.apsusc.2026.166210
Qingsong Zhao, Guanglei Zhang, Shuai Yang, Zunbin Duan, Gang Yu
Filter supercapacitors (FSCs) have emerged as ideal candidates to replace traditional aluminum electrolytic capacitors due to their superior power characteristics and rapid charge–discharge capabilities, offering a critical solution for the miniaturization and integration of electronic devices. However, their further development has been hindered by the inherent trade-off between the charge–discharge rate and charge storage capacity of electrode materials. This study proposes an innovative composite electrode design strategy, successfully constructing a three-dimensional reduced graphene oxide aerogel film skeleton with high electronic conductivity through a mild thermochemical reduction method. The oxygen-containing functional groups retained on its surface enhance the ion charge transport rate, ultimately achieving a coordinated optimization of electronic and ionic conductivity. Meanwhile, the surface-loaded, highly electrochemically active CuxO nanoparticles synergistically boost the capacitance density of this integrated composite electrode. The FSC based on these electrodes demonstrates outstanding frequency response at a high frequency of 120 Hz: a phase angle of −80.04°, and a remarkable areal capacitance of 3.24 mF cm−2. This study not only significantly advances the performance boundaries of FSCs in balancing frequency response and capacitance density but also provides innovative theoretical guidance and technical solutions for the electrode structure design of next-generation miniaturized FSCs.
{"title":"High-performance filter supercapacitors utilizing graphene aerogel composite thin-film electrodes","authors":"Qingsong Zhao, Guanglei Zhang, Shuai Yang, Zunbin Duan, Gang Yu","doi":"10.1016/j.apsusc.2026.166210","DOIUrl":"https://doi.org/10.1016/j.apsusc.2026.166210","url":null,"abstract":"Filter supercapacitors (FSCs) have emerged as ideal candidates to replace traditional aluminum electrolytic capacitors due to their superior power characteristics and rapid charge–discharge capabilities, offering a critical solution for the miniaturization and integration of electronic devices. However, their further development has been hindered by the inherent trade-off between the charge–discharge rate and charge storage capacity of electrode materials. This study proposes an innovative composite electrode design strategy, successfully constructing a three-dimensional reduced graphene oxide aerogel film skeleton with high electronic conductivity through a mild thermochemical reduction method. The oxygen-containing functional groups retained on its surface enhance the ion charge transport rate, ultimately achieving a coordinated optimization of electronic and ionic conductivity. Meanwhile, the surface-loaded, highly electrochemically active Cu<em><sub>x</sub></em>O nanoparticles synergistically boost the capacitance density of this integrated composite electrode. The FSC based on these electrodes demonstrates outstanding frequency response at a high frequency of 120 Hz: a phase angle of −80.04°, and a remarkable areal capacitance of 3.24 mF cm<sup>−2</sup>. This study not only significantly advances the performance boundaries of FSCs in balancing frequency response and capacitance density but also provides innovative theoretical guidance and technical solutions for the electrode structure design of next-generation miniaturized FSCs.","PeriodicalId":247,"journal":{"name":"Applied Surface Science","volume":"26 1","pages":""},"PeriodicalIF":6.7,"publicationDate":"2026-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146129542","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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