IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-14 DOI: 10.1016/j.carbon.2025.120530

Keigo Otsuka , Shigeo Maruyama

{"title":"Catalyst-mediated etching of carbon nanotubes exhibiting electronic-structure insensitivity and reciprocal kinetics with growth","authors":"Keigo Otsuka , Shigeo Maruyama","doi":"10.1016/j.carbon.2025.120530","DOIUrl":"10.1016/j.carbon.2025.120530","url":null,"abstract":"<div><div>The selective etching of carbon nanotubes has been widely explored as a post-synthetic route for enriching semiconducting species. As nanoelectronic applications increasingly demand pure semiconducting nanotubes for use in field-effect transistors and other optoelectronic devices, understanding the mechanistic basis of selective removal becomes critical. While etching selectivity is often attributed to electronic structure effects on tube walls, its relevance in the presence of catalyst nanoparticles remains unclear. Here, we directly quantify the catalyst-mediated etching and growth rates of individual single-walled carbon nanotubes using elaborate isotope labeling methods. Surprisingly, in water vapor and methanol environments, catalytic etching proceeds with negligible dependence on tube electronic type, in sharp contrast to non-catalytic oxidation pathways. <em>In-situ</em> Raman analysis upon heating on nanotube ensembles also confirms metallicity-insensitive etching under catalytic conditions, whereas sidewall oxidation without catalysts exhibits pronounced selectivity. Our growth kinetic model, which precisely describes the kinetics of catalytic etching process, motivates kinetic Monte Carlo simulations of nanotube edge dynamics, revealing the reciprocal nature of edge configuration during growth and etching. These findings highlight a mechanistic difference between catalytic and non-catalytic reactivity and thus propose that catalytic etching may serve as a diagnostic mirror of growth behavior when using pre-sorted carbon nanotube samples.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"243 ","pages":"Article 120530"},"PeriodicalIF":10.5,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144329919","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}

引用次数: 0

A jackfruit-inspired ultralight high load-bearing multifunctional microwave absorbing composite with high temperature resistance by modified E-glass fabric/oriented aerogel 一种以菠萝蜜为灵感，由改性e -玻璃织物/定向气凝胶制成的耐高温超轻、高承载多功能微波吸收复合材料

IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-14 DOI: 10.1016/j.carbon.2025.120518

Yaru Cao , Yuchang Qing , Hongyao Jia , Hanyi Nan , Chuanyang Jiang , Junjie Yang , Chunhai Wang , Fa Luo

{"title":"A jackfruit-inspired ultralight high load-bearing multifunctional microwave absorbing composite with high temperature resistance by modified E-glass fabric/oriented aerogel","authors":"Yaru Cao , Yuchang Qing , Hongyao Jia , Hanyi Nan , Chuanyang Jiang , Junjie Yang , Chunhai Wang , Fa Luo","doi":"10.1016/j.carbon.2025.120518","DOIUrl":"10.1016/j.carbon.2025.120518","url":null,"abstract":"<div><div>Conventional polymer matrix microwave absorbing (MA) composites often struggle to balance lightweight with high load-bearing capacity. Inspired by the bract-shell structure of jackfruit, we introduces an armored shell design on the outer layer of aligned aerogels, significantly enhancing mechanical strength while preserving their intrinsic excellent impedance matching and microwave attenuation. At the microscopic level, a heterogeneous interface structure was constructed by growth of 0D Mo<sub>2</sub>C on 2D graphite nanosheets (GN). At the macroscopic level, an GN@Mo<sub>2</sub>C oriented aerogel was fabricated within a modified 3D integrated hollow E-glass fabric using ice-templating. The aerogel was then backfilled with 9802 resin/hollow glass microsphere (HGM) slurry to produce the final GN@Mo<sub>2</sub>C/E-glass composite. By controlling the supercooling process at different depths within the cold trap, the dispersion of GN@Mo<sub>2</sub>C in the sodium carboxymethyl cellulose (CMC) framework was optimized, achieving full-band coverage in X-Ku. The synergistic effect of GN@Mo<sub>2</sub>C interfacial stress dispersion/enhanced force conduction of vertically oriented aerogel sheets/resin-aerogel interlocking and interface modification, the flexural strength of the composite increased from 8.02 MPa to 81.75 MPa, while maintaining excellent mechanical after annealing. Additionally, the composite exhibited outstanding thermal insulation and flame retardancy. This work provides an effective strategy for the integrated MA and load bearing multifunctional composite.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"243 ","pages":"Article 120518"},"PeriodicalIF":10.5,"publicationDate":"2025-06-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289137","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}

引用次数: 0

Graphene tribofilm formation on hydrogen-free DLC/B4C periodical nano-multilayer coatings: Effect of sputtering in N2 atmosphere 无氢DLC/B4C周期纳米多层膜上石墨烯摩擦膜的形成：N2气氛溅射的影响

IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-13 DOI: 10.1016/j.carbon.2025.120529

Mingfeng Li , Yuzhen Liu , Dae-Eun Kim , Oleksiy V. Penkov

{"title":"Graphene tribofilm formation on hydrogen-free DLC/B4C periodical nano-multilayer coatings: Effect of sputtering in N2 atmosphere","authors":"Mingfeng Li , Yuzhen Liu , Dae-Eun Kim , Oleksiy V. Penkov","doi":"10.1016/j.carbon.2025.120529","DOIUrl":"10.1016/j.carbon.2025.120529","url":null,"abstract":"<div><div>Amorphous diamond-like carbon (DLC) coatings are usually doped with other elements or developed as periodical nano-multilayer coatings (PNC) to enhance tribological performance. In this study, hydrogen (H)-free DLC/B<sub>4</sub>C PNCs were fabricated, and their mechanical and macroscale tribological properties were investigated. The elasticity index (H/E) of the DLC/B<sub>4</sub>C PNC was considerable compared to other coatings. In friction tests, we discovered that graphene sheets and various types of graphite flakes developed at the edges of wear tracks (pile-ups) and tribofilms. This phenomenon has not been reported previously for H-free DLC-based coatings. For nitrogen (N)-doped PNC, the hardness decreased, whereas the adhesion strength improved. Friction experiments showed that the wear rate of N-doped PNC was lower than that of the undoped PNC, whereas its coefficient of friction (COF) was higher. Raman spectra revealed that graphene/graphite sheets were not present in the pile-ups or tribofilms, suggesting that nitridation inhibited graphene formation. The absence of the graphene/graphite tribofilms and the decreased hardness contributed to higher COF.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"243 ","pages":"Article 120529"},"PeriodicalIF":10.5,"publicationDate":"2025-06-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289136","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}

引用次数: 0

Layered double hydroxide embedded in loofah-derived biocarbon composites towards broadband electromagnetic wave absorption and enhanced flame retardancy 层状双氢氧化物嵌入丝瓜衍生生物碳复合材料对宽带电磁波吸收和增强阻燃性能的研究

IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-11 DOI: 10.1016/j.carbon.2025.120526

Hao He , Zixuan Wang , Chenhao Xie , Yongxin Qian , Shuangfu Gang , Yang Tao , Hui Long , Wenguang Zhang , Yubo Luo , Qinghui Jiang , Xin Li , Junyou Yang

{"title":"Layered double hydroxide embedded in loofah-derived biocarbon composites towards broadband electromagnetic wave absorption and enhanced flame retardancy","authors":"Hao He , Zixuan Wang , Chenhao Xie , Yongxin Qian , Shuangfu Gang , Yang Tao , Hui Long , Wenguang Zhang , Yubo Luo , Qinghui Jiang , Xin Li , Junyou Yang","doi":"10.1016/j.carbon.2025.120526","DOIUrl":"10.1016/j.carbon.2025.120526","url":null,"abstract":"<div><div>The rising utilization of high-frequency and high-power electronic equipments necessitates the advancement of multifunctional green packaging materials characterized by electromagnetic wave absorption, high thermal conductivity, and flame retardancy. Achieving these properties while maintaining lightness and environmental sustainability remains a critical challenge. In this study, carbonized loofah sponge and layered double hydroxides (CLS@LDH) multifunctional green nanocomposites were developed from loofah vine waste using direct in situ growth strategy. The incorporation of LDH improves impedance matching and interface polarization. It is significant that a minimum reflection loss (RL<sub>min</sub>) of −55.38 dB, coupled with an effective absorption bandwidth (EAB) of 7.14 GHz, is achieved with a mere 12 wt% filling ratio. In addition, the unique complex interwoven 3D biomass network and the formation of a gas protection barrier by the decomposition of LDH at high temperatures contribute to 81.36 % enhanced thermal conductivity compared to that of epoxy resin (EP). This improvement is accompanied by a notable reduction in both the peak heat release rate and total heat release rate, which decline by 32.5 % and 23.1 %, respectively. This work presents green production method for biomass-derived carbon composites, and the material integrates multifunctionality in terms of thermal conductivity, wave absorption, and flame retardancy. It demonstrates considerable for utilization as green electronic packaging material for broadband electromagnetic wave absorption.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"243 ","pages":"Article 120526"},"PeriodicalIF":10.5,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279327","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}

引用次数: 0

Carbon quantum dots as functional additives for electrochemical energy storage systems: A review 碳量子点作为电化学储能系统功能添加剂的研究进展

IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-10 DOI: 10.1016/j.carbon.2025.120525

Wenxin Guo , Zhou Shen , Jiani Wang , Yujing Zheng , Linjie Lu , Fang Guo , Guiyun Yu , Chengyan Ge , Yong Dai , Yue Lian

引用次数: 0

Construction of 1D porous MOF-derived ZnO/C fibers anchored by 0D cobalt nanoparticles for enhanced microwave absorption and thermal conductivity 0D钴纳米颗粒锚定一维多孔mof衍生ZnO/C纤维增强微波吸收和导热性的构建

IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-10 DOI: 10.1016/j.carbon.2025.120527

Sihan Wang , Xin Liu , Junfeng Qiu , Qiqi Mo , Tingyuan Zhang , Wei Wang

{"title":"Construction of 1D porous MOF-derived ZnO/C fibers anchored by 0D cobalt nanoparticles for enhanced microwave absorption and thermal conductivity","authors":"Sihan Wang , Xin Liu , Junfeng Qiu , Qiqi Mo , Tingyuan Zhang , Wei Wang","doi":"10.1016/j.carbon.2025.120527","DOIUrl":"10.1016/j.carbon.2025.120527","url":null,"abstract":"<div><div>As to most traditional microwave-absorbing materials, weak thermal conductivity and narrow absorption bandwidth have greatly limited their practical applications. In this work, a novel synthesis strategy was put forward to construct the porous one-dimensional (1D) ZnO/C fibers anchored by zero-dimensional (0D) cobalt nanoparticles (Co–ZnO/C) via a synergistic approach combining electrospinning, seed-assisted growth of ZnCo bimetal-organic frameworks (MOFs), and carbonization processes. Changing metal cobalt ion ratios in the fibers can effectively adjust the graphitization degree and electromagnetic parameters, and then correspondingly enhance the microwave absorption performance. Further, reduced cobalt nanoparticles significantly amplify interfacial polarization and magnetic loss, while the hierarchical porous structure optimizes impedance matching. Consequently, increasing the cobalt contents leads to an improvement in RL<sub>min</sub> from −50.83 dB to −63.42 dB, albeit with a slight decrease in the EAB<sub>max</sub> from 7.28 GHz (10.72–18.00 GHz) at 2.50 mm to 7.04 GHz (9.12–16.16 GHz) at 2.90 mm. Excessive addition of cobalt ion can also result in a decrease in microwave absorption performance. Specific porous 1D structure extends the electron transport path and enhances thermal conductivity of the Co–ZnO/C composites. The corresponding thermal conductivity reaches 0.318 W m<sup>−1</sup> K<sup>−1</sup>, which is 40 % higher than that of pure epoxy resin. The superior electromagnetic wave absorption performance, coupled with the elevated thermal conductivity, renders the as-synthesized Co–ZnO/C composites highly promising for application in the design and manufacture of next-generation wireless communication equipment and high power devices.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"243 ","pages":"Article 120527"},"PeriodicalIF":10.5,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144254528","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}

引用次数: 0

Molten aluminum-mediated production of carbon nanomaterials from hydrocarbon streams: Morphology and energy storage 熔融铝介导的碳纳米材料从碳氢化合物流的生产：形态和能量储存

IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-10 DOI: 10.1016/j.carbon.2025.120515

Ramu Banavath , James Shea , Yufan Zhang , Sayyam Deshpande , Smita Shivraj Dasari , Ian Bishop , Ron Presswood , Micah J. Green

{"title":"Molten aluminum-mediated production of carbon nanomaterials from hydrocarbon streams: Morphology and energy storage","authors":"Ramu Banavath , James Shea , Yufan Zhang , Sayyam Deshpande , Smita Shivraj Dasari , Ian Bishop , Ron Presswood , Micah J. Green","doi":"10.1016/j.carbon.2025.120515","DOIUrl":"10.1016/j.carbon.2025.120515","url":null,"abstract":"<div><div>The sustainable synthesis of carbon nanomaterials (CNMs) from hydrocarbons has gained significant attention for their potential in energy storage applications. In this work, we investigate the morphology, properties, and applications of carbon nano-onions (CNOs) produced by a catalyst-free molten aluminum-based reactor. This reactor decomposes hydrocarbon feedstock into high-quality CNOs while simultaneously generating hydrogen gas, a valuable green energy byproduct (H<sub>2</sub> gas), and preventing the emission of greenhouse gases. The synthesized CNOs were extensively characterized using SEM, TEM, XRD, Raman spectroscopy, and TGA analysis, revealing their graphitic, defect-rich structure and good thermal stability. Electrochemical studies demonstrated the efficacy of CNOs as conductive additives in conventional supercapacitors, achieving higher capacitance and cycling stability compared to commercial alternatives. Furthermore, the CNOs were successfully employed as active materials for printed flexible micro-supercapacitors (MSCs), exhibiting excellent electrochemical performance, mechanical flexibility, and long-term stability. Notably, these MSCs operated effectively without metal current collectors, offering a scalable and cost-effective solution for flexible energy storage devices. The results highlight the promise of hydrocarbon-derived CNOs as sustainable materials for advanced energy storage technologies.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"243 ","pages":"Article 120515"},"PeriodicalIF":10.5,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144289138","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}

引用次数: 0

Three birds with one stone: PDA protection strategy efficiently enhance electromagnetic wave absorption performance 一石三鸟：PDA保护策略有效提升电磁波吸收性能

IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-09 DOI: 10.1016/j.carbon.2025.120528

Yongwen Yang , Xin Yang , Yue Zhang , Weiping Ye , Kunyao Cao , Rui Zhao , Tian Zheng , Wenjian Wang , Weidong Xue

{"title":"Three birds with one stone: PDA protection strategy efficiently enhance electromagnetic wave absorption performance","authors":"Yongwen Yang , Xin Yang , Yue Zhang , Weiping Ye , Kunyao Cao , Rui Zhao , Tian Zheng , Wenjian Wang , Weidong Xue","doi":"10.1016/j.carbon.2025.120528","DOIUrl":"10.1016/j.carbon.2025.120528","url":null,"abstract":"<div><div>Metal-organic framework (MOF)-derived carbon materials are considered to be promising for electromagnetic wave absorption, and it is reported that the hollow structure can improve the electromagnetic wave absorption performance. However, the synthesis of hollow-structured MOF-derived carbon material without the use of corrosive solvents remains a challenge. Herein, a controlled morphological protection strategy is proposed; the polydopamine (PDA) is not only an “armor” but also can convert cobalt zeolitic imidazolate frameworks (Co-ZIFs) into hollow leaf-like carbon nanosheets. What's more, the N atoms contained in the PDA can enhance the dipole polarization loss. This strategy leads to the formation of a novel nanocomposite material consisting of hollow leaf-like CoZ@C carbon. The component and structure of the material were simultaneously optimized by adjusting the PDA content and carbonization temperature. The leaf-like carbon nanosheets, with a filling ratio of 16 wt%, demonstrated an effective absorption bandwidth of 5.6 GHz at a thickness of 1.9 mm, and the minimum reflection loss can be up to −44.17 dB at 1.7 mm. The superior electromagnetic wave absorption capability can be attributed to the cooperative effects of conductive loss, polarization loss, and magnetic loss. Furthermore, the PDA interfacial protection strategy has inspired the precise creation of hollow cavities in other MOF-derived materials.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"243 ","pages":"Article 120528"},"PeriodicalIF":10.5,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144279329","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}

引用次数: 0

Carbon nitride embedded in carbon layer with interconnected porous nanosheets structure for solar-driven photocatalytic reaction 氮化碳包埋在碳层中，具有互连多孔纳米片结构，用于太阳能驱动的光催化反应

IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-09 DOI: 10.1016/j.carbon.2025.120523

Zhengzheng Xie , Qiang Gao , Sajjad Hussain , Yihan Sun , Jiaxin Chen , Xitong Yang , Xianwei Fu , Qiuye Li

{"title":"Carbon nitride embedded in carbon layer with interconnected porous nanosheets structure for solar-driven photocatalytic reaction","authors":"Zhengzheng Xie , Qiang Gao , Sajjad Hussain , Yihan Sun , Jiaxin Chen , Xitong Yang , Xianwei Fu , Qiuye Li","doi":"10.1016/j.carbon.2025.120523","DOIUrl":"10.1016/j.carbon.2025.120523","url":null,"abstract":"<div><div>The implementation of multiple strategies that involve constructing a beneficial morphological structure and coupling with the thermal field can significantly promote photogenerated charge separation in carbon nitride (CN) and enhance solar irradiation utilization, which are effective approaches to improve its solar-driven photocatalytic reaction efficiency. CN embedded in carbon layer with an interconnected nanosheet architecture was obtained by coaxial electrostatic spraying. In which, carbon layer not only exhibit photothermal effects: elevating the surface/interface temperature of material and accelerating the thermodynamic rate of reactions, but also offer expedited pathways for the photogenerated charges. In addition, the interconnected nanosheets, with a thickness of ∼30 nm and abundant mesoporous-dominated porosity, also facilitate rapid mass transfer processes. The hydrogen evolution reaction (HER) rate of the composite photocatalyst used for solar-driven water splitting reached 6.48 mmol h<sup>−1</sup> g<sup>−1</sup> and it demonstrated good cyclic stability and remarkable dye degradation efficiency. Photoelectrochemical test results indicated that, catalysts featuring an embedded structure of interconnected nanosheets can effectively reduce ohmic resistance and suppress the recombination of photogenerated charges. Ultimately, the intrinsic mechanisms underpinning this enhancement were elucidated through theoretical calculations. This work introduces novel strategies and perspectives for multi-field synergy in the pursuit of efficient solar-driven water splitting for HER.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"243 ","pages":"Article 120523"},"PeriodicalIF":10.5,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144271237","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}

引用次数: 0

Kinetically well-matched dual-carbon electrodes derived from poly(aniline-co-pyrrole) hollow nanospheres for advanced sodium-ion capacitors 先进钠离子电容器用聚苯胺-共吡咯空心纳米球制备动力学匹配良好的双碳电极

IF 10.5 2区材料科学

Carbon Pub Date : 2025-06-09 DOI: 10.1016/j.carbon.2025.120524

Jinghao Huo , Zhenhua Li , Yingjie Xiao , Lifeng Zhang , Gentian Yue , Shouwu Guo

{"title":"Kinetically well-matched dual-carbon electrodes derived from poly(aniline-co-pyrrole) hollow nanospheres for advanced sodium-ion capacitors","authors":"Jinghao Huo , Zhenhua Li , Yingjie Xiao , Lifeng Zhang , Gentian Yue , Shouwu Guo","doi":"10.1016/j.carbon.2025.120524","DOIUrl":"10.1016/j.carbon.2025.120524","url":null,"abstract":"<div><div>Kinetically matched electrode design is key to enhancing the high energy–power characteristics of dual-carbon sodium-ion capacitors (SICs). In this study, poly (aniline-co-pyrrole) (PACP) hollow nanospheres are used as a homogenous precursor to synthesize N/O co-doped hard carbon negative electrodes and porous carbon positive electrodes, enabling well-matched kinetic behavior between the negative and the positive electrodes. The results show that when the carbonization temperature is optimized to 1300 °C, the resulting hard carbon hollow nanospheres (HCHNS-1300) exhibits an optimal degree of graphitization suitable for sodium-ion storage, delivering a reversible capacity of 259 mAh g<sup>−1</sup> at 0.1 A g<sup>−1</sup> and maintaining 70 % capacity retention after 10,000 cycles at a high rate of 2 A g<sup>−1</sup>. For the positive electrode, adjusting the mass ratio of PACP to the activating agent of potassium citrate (1:4) yields porous carbon hollow nanospheres/nanosheets (PCHNS-4) with a high defect density and specific surface area (1947 m<sup>2</sup> g<sup>−1</sup>), significantly improving the kinetics of ions adsorption/desorption. The SIC device assembled with this dual-carbon electrode system delivers a specific energy of 92.5 Wh kg<sup>−1</sup> at a specific power of 249.7 W kg<sup>−1</sup>. Notably, even at an ultra-high specific power of 11,869.5 W kg<sup>−1</sup>, it still retains a specific energy of 82.4 Wh kg<sup>−1</sup>. The kinetic matching between the negative and positive electrodes is induced by N/O co-doping and homologous-derived hierarchical porosity engineering. This study offers an integrated material–structure–function strategy for the rational design of kinetics well-matching dual-carbon electrodes for SICs.</div></div>","PeriodicalId":262,"journal":{"name":"Carbon","volume":"243 ","pages":"Article 120524"},"PeriodicalIF":10.5,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144261523","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}

引用次数: 0

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