ACS Applied Nano Materials最新文献

{"title":"Biphase Nanocrystalline WO3 Thin Films for Dual-Functional Electrochromic Smart Windows with Long-Term Stability","authors":"Haopeng Jing,&nbsp;Kun Li,&nbsp;Shuling Xiang,&nbsp;Ran Jiang,&nbsp;Jumei Zhou and Hongliang Zhang*,&nbsp;","doi":"10.1021/acsanm.5c0132110.1021/acsanm.5c01321","DOIUrl":"https://doi.org/10.1021/acsanm.5c01321https://doi.org/10.1021/acsanm.5c01321","url":null,"abstract":"<p >Electrochromic energy storage devices (EESDs) integrating optical modulation and energy storage are gaining attention for smart building applications. The WO₃ thin films with a biphasic nanocrystalline structure were prepared using a facile solution-based method and a low-temperature scalable blade-coating technology. Combined with zinc as the counter electrode, the WO₃–Zn EESDs utilizes the redox reactions of WO₃ and Zn to achieve dual functionality of energy storage and electrochromism. The structure with biphasic nanocrystals embedded in the amorphous WO₃ matrix strengthens the electrochemical activity and structural stability of the film, thereby improving the optical performance and cycling stability of the device. The device exhibits a 76% optical modulation at 633 nm, a high areal capacity of 106.8 mAh m^–2 at 0.1 A m^–2, and exceptional cycling stability, retaining 90.8% of optical modulation after 5000 cycles. These findings highlight the potential of WO₃–Zn EESDs for sustainable energy systems and multifunctional smart window applications.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7817–7824 7817–7824"},"PeriodicalIF":5.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842167","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}

{"title":"Mo2C Hollow Nanospheres with Co-Nx Sites in N-Doped Carbon Heterostructures as Trifunctional Electrocatalysts for Electrochemical Energy Conversion","authors":"Mingzhu Wang,&nbsp;Shuyu Yue,&nbsp;Xingyun Zhao,&nbsp;Yaoyan Wu,&nbsp;Yaohui Zhang*,&nbsp;Yaqian Dong* and Tiehua Ma*,&nbsp;","doi":"10.1021/acsanm.5c0051910.1021/acsanm.5c00519","DOIUrl":"https://doi.org/10.1021/acsanm.5c00519https://doi.org/10.1021/acsanm.5c00519","url":null,"abstract":"<p >Developing highly efficient and durable trifunctional electrocatalysts is essential for advancing technologies related to water splitting, oxygen reduction, and hydrogen storage, which are critical for energy conversion and storage. In this study, we encapsulated Co-MOFs on the surface of Mo₂C hollow spheres and achieved the Co@NC/Mo₂C composite material through high-temperature annealing. In the optimal catalyst, Co@NC/Mo₂C-0.1, Co@NC nanosheets were uniformly distributed on the Mo₂C hollow spheres, and the BET surface area was well maintained. Compared to Co nanoparticles, Co-Nx in Co@NC/Mo₂C-0.1 exhibited a greater modulation effect on the electronic structure of Mo₂C. Density functional theory (DFT) calculations showed that the Co@NC/Mo₂C heterostructure effectively lowered the energy barrier for the hydrogen evolution reaction (HER) on Mo₂C and enhanced the performance of the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) through electronic coupling. Specifically, for Co@NC/Mo₂C-0.1, at a current density of 10 mA cm^–2, the half-wave potential for ORR was 0.86 V, the overpotential for OER was 349 mV, and the overpotential for HER was 158 mV. Additionally, this catalyst exhibited exceptional stability across all three reactions, making it an ideal candidate for sustainable energy technologies.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7694–7706 7694–7706"},"PeriodicalIF":5.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842192","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}

{"title":"Elucidating the Role of Cu in Ni-Based Catalyst at Nanoscale in Aqueous-Phase Reforming of Ethylene Glycol","authors":"Yifan Jin,&nbsp;Shuchao Ge,&nbsp;Chuo Du,&nbsp;Hongfei Xiao,&nbsp;Chao Gai,&nbsp;Jianghao Zhang* and Changbin Zhang*,&nbsp;","doi":"10.1021/acsanm.5c0163610.1021/acsanm.5c01636","DOIUrl":"https://doi.org/10.1021/acsanm.5c01636https://doi.org/10.1021/acsanm.5c01636","url":null,"abstract":"<p >Hydrogen is a clean energy source with high mass-based energy density, necessitating the exploration of sustainable production methods, such as aqueous-phase reforming (APR) of biomass-derived feedstocks. In the APR reaction, the Ni-based catalysts have shown promising activity; however, the hydrogenation side reactions prevail throughout the whole reaction gradient, consuming the produced hydrogen. In this study, the Cu-modified Ni catalysts were synthesized and evaluated in APR of ethylene glycol (EG), aiming at the development of a selective Ni-based APR catalyst and elucidation of the role of Cu at the nanoscale. Incorporating an appropriate amount of Cu on Ni enhanced the hydrogen selectivity from 40% for 0Cu/Ni to 71% for 30Cu/Ni with maintained hydrogen production rate, while the activity diminished when the Cu content exceeded the optimal. Kinetic analyses and complementary characterization techniques demonstrated that Cu incorporation into the Ni matrix resulted in the formation of Cu–Ni alloy at the nanoscale and hybridization of the electronic orbital at the metal surface, decreasing the electron density of Ni to change its affinity to the specific functional groups. Consequently, the adsorption configuration of ethylene glycol was switched from the oxygen site on Ni to the carbon site on Cu-modified Ni, which may lead to the distinct barrier for both C–C bond cleavage and the hydrogenation of the formed intermediates. The methanation was inhibited by Cu incorporation with promoted hydrogen selectivity and maintained hydrogen productivity. This study may contribute to the future catalyst design for selective hydrogen production in APR reactions.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7858–7866 7858–7866"},"PeriodicalIF":5.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842288","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}

{"title":"Ultrastable One-Piece Pressure-Sensitive Memristor Based on Carbon Quantum Dots on BiFeO3","authors":"Yuxiang Qin*,&nbsp; and ,&nbsp;Xinshan Zhu,&nbsp;","doi":"10.1021/acsanm.5c0016810.1021/acsanm.5c00168","DOIUrl":"https://doi.org/10.1021/acsanm.5c00168https://doi.org/10.1021/acsanm.5c00168","url":null,"abstract":"<p >Developing a multifunctional device with integration of data memory and sensing performance is expected to create an era of neuromorphic computing. In this paper, a one-piece pressure-sensitive memristor based on BFO(BiFeO₃)-carbon quantum dots (CQDs) is designed to overcome the issues of redundant data transmission and the integration challenges typically faced when coupling pressure sensors with memristors. By introducing CQDs, the stability of the device’s memristive performance is significantly enhanced, achieving ultrahigh stability and maintaining consistent resistive storage performance for up to 6 months. Additionally, we observed that applying pressure to the device induces a change in its resistance, proving that it possesses both stable memristive performance and sensitivity to pressure. In addition, resistive switching and pressure-sensing mechanisms are also thoroughly explained through current fitting analysis. This study demonstrates the promising multifunctional integrated capabilities of BFO-CQD (single-material) devices, which offer a novel solution for achieving highly uniform artificial tactile devices.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7574–7581 7574–7581"},"PeriodicalIF":5.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842504","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}

{"title":"Two-Dimensional Graphdiyne-Black Phosphorus van der Waals Heterostructure: A Versatile Platform for Broadband Photodetection from UV to IR","authors":"Zhaleh Ghafary,&nbsp;Rahman Hallaj*,&nbsp;Abdollah Salimi* and Keivan Akhtari,&nbsp;","doi":"10.1021/acsanm.5c0047910.1021/acsanm.5c00479","DOIUrl":"https://doi.org/10.1021/acsanm.5c00479https://doi.org/10.1021/acsanm.5c00479","url":null,"abstract":"<p >To enhance the energy harvesting capabilities of optoelectronic devices, it is necessary to achieve both broadband and targeted photodetection with improved sensitivity. To address the limitations of photodetection, the combination of small band gap semiconductors with large band gap 2D semiconductors has been found to offer additional benefits. Specifically, two-dimensional (2D) van der Waals heterostructures with customized band alignment have gained significant attention due to their potential advantages. The relation between the built-in field and optoelectrical properties of such heterostructures is not fully understood. Here, a highly sensitive air-protected phototransistor device based on van der Waals heterojunction between few-layer black phosphorus (BP) and few-layer graphdiyne (GDY) has been proposed. Black phosphorus (BP), with its small and direct tunable band gap, complements the spectral range between graphene and TMDCs and offers extraordinary electrical and mechanical properties. The optoelectrical properties and photodetection mechanism have been investigated under UV to IR wavelengths along with the computational methods. The BP/GDY FET photodetector presents ambipolar behavior with mobilities in the order of 1656.3 and 804.271 cm²/(V·s), for electron and hole, respectively, and current on/off ratios larger than 1.19 × 10⁴. Besides, the device demonstrates the high and gate-controlled photoresponsivity of <i>R</i> = 1267.43 and 3041.82 A W^–1 across a range of wavelengths (λ in the range of 395–940 nm) in UV and near-infrared regions, respectively. Furthermore, the BP/GDY phototransistor device shows a time response of 19 ms (rise) and 6 ms (fall). This study highlights a significant improvement in the photovoltaic properties within the ultraviolet and infrared spectra and a high energy conversion efficiency for heterojunctions based on few-layer 2D materials. This groundbreaking design has a significant potential to revolutionize the field of optoelectronics by enabling the creation of exceptional infrared photodetectors with outstanding performance.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7719–7735 7719–7735"},"PeriodicalIF":5.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842174","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}

{"title":"Laser-Patterned Cu–Ag Alloy Micropillars Incorporated with Laser-Ablated AgAu Bimetallic Nanoparticles for Label-free Detection of Water Pollutants","authors":"Jithin Kundalam Kadavath,&nbsp;Rene Fabian Cienfuegos Pelaes,&nbsp;Selene Sepúlveda Guzman,&nbsp;Nora Aleyda Garcia Gomez,&nbsp;David Avellaneda Avellaneda,&nbsp;Bindu Krishnan and Sadasivan Shaji*,&nbsp;","doi":"10.1021/acsanm.5c0068410.1021/acsanm.5c00684","DOIUrl":"https://doi.org/10.1021/acsanm.5c00684https://doi.org/10.1021/acsanm.5c00684","url":null,"abstract":"<p >Water pollution is always a threat for all organisms, which has detrimental impacts on their health and the ecosystem. The goal of this study is to identify and quantify even the tiniest amounts of surfactant pollutants and heavy metals in water using surface-enhanced Raman spectroscopy (SERS). For making SERS substrates, thin layers of copper (Cu) and silver (Ag) were sequentially deposited on silicon wafer (Si) by thermal evaporation. Following this, laser patterning of Si/Cu/Ag immersed in a AgAu bimetallic nanocolloid produced microstructure features of CuAg-alloyed micropillars embellished with AgAu bimetallic nanoparticles on their surface. The nanocolloids composed of spherical AgAu nanoparticles of an average size of 13.4 ± 2.7 nm having a plasmonic peak at 449 nm were synthesized by pulsed laser ablation in liquid (PLAL). The surface morphology and chemical states of elements present on the SERS substrates were analyzed by scanning electron microscopy and X-ray photoelectron spectroscopy. The SERS sensors present remarkable sensitivity, measuring 1 pM for rhodamine 6G, 10⁻¹⁰ M for surfactant molecules, and 1 nM for heavy metal compounds in water. The sensor’s signal homogeneity is shown by a comparatively minimal relative standard deviation (RSD) of 11.07% for 1 nM. A linearity plot of signal intensity to concentration demonstrating R² = 0.994 validates the quantitative identification of contaminants. The sensors are stable and could reproduce SERS spectra for about a month of storage time. Above all, their reusability after a simple microwave treatment and scribing in AgAu nanocolloids is their advantage.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7747–7759 7747–7759"},"PeriodicalIF":5.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842247","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}

{"title":"Liquid Metal-Bridged MXene Modified Aramid Nanofiber Composite Film for Thermal Management","authors":"Tianyi Zhang,&nbsp;Tianyu Qiao,&nbsp;Jinyu Shan and Jianhua Ma*,&nbsp;","doi":"10.1021/acsanm.5c0074410.1021/acsanm.5c00744","DOIUrl":"https://doi.org/10.1021/acsanm.5c00744https://doi.org/10.1021/acsanm.5c00744","url":null,"abstract":"<p >The miniaturization and integration of modern microelectronic devices have driven the development of thermal management and conversion materials. However, traditional thermal management materials suffer from limitations such as single functionality, poor flexibility, and insufficient stability, which hinder their application in portable wearable electronics. In this work, we report the preparation of liquid metal (LM)-bridged MXene-modified nanoaramid fiber (ANF) composite films (ANF_2h/LM-MXene) using vacuum-assisted self-assembly and hot-pressing techniques. The bridging of LM and the bonding of ANF create efficient phonon and electron transport pathways within the composite system, endowing the material with high thermal conductivity (13.06 W m^–1 K^–1) and mechanical strength (165.26 MPa). Functionally, the composite films exhibit outstanding joule heating performance (heating up to 156 °C at 4 V), photothermal conversion efficiency (heating up to 115.1 °C under 250 W optical power), and heat dissipation capabilities. The lightweight and strong ANF_2h/LM-MXene composite films, with their superior photothermal, electrothermal, and thermal properties, show great potential for applications in smart wearable devices, portable medical devices, and microelectronics.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7760–7769 7760–7769"},"PeriodicalIF":5.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842191","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}

{"title":"Se Nanowire Crystal Formation via Oxidation of 2D HfSe2: A Solid-State, In Situ Reaction Coupling for Heterogeneous Integration Technologies","authors":"Sunvir Sahota,&nbsp;Irina Chircă,&nbsp;Oliver J. Burton,&nbsp;Hao Yu,&nbsp;Max Rimmer,&nbsp;Jinfeng Yang,&nbsp;Kyungseo Park,&nbsp;Arthur Summers,&nbsp;Siddika Mertdinc-Ulkuseven,&nbsp;Matthew Lindley,&nbsp;Sarah J. Haigh and Stephan Hofmann*,&nbsp;","doi":"10.1021/acsanm.5c0030810.1021/acsanm.5c00308","DOIUrl":"https://doi.org/10.1021/acsanm.5c00308https://doi.org/10.1021/acsanm.5c00308","url":null,"abstract":"<p >Effective heterogeneous integration of low-dimensional nanomaterials in applications ranging from quantum electronics to biomedical devices requires a detailed understanding of different formation and interfacing reactions and the ability to synergize these processes. We report the formation of 1D Se nanowires via low-temperature (30–150 °C) atmospheric oxidation of 2D HfSe₂ crystals. The localized, surface-bound process starting from exfoliated HfSe₂ flakes on a SiO₂/Si wafer support does not involve wet chemistry and allows us to implement optical operando reaction screening and explore the relevant parameter space and underpinning mechanisms. Hf oxidation frees Se at the buried hafnia–HfSe₂ interface, which segregates as amorphous Se, forming aggregates, blisters, and interfacial films. We show that upon diffusion to the stack surface, this Se can crystallize into trigonal Se nanowires with diameters ranging from ∼45 nm to 1.9 μm and lengths up to 43 μm depending on temperature and process time. We discuss the coupled reaction kinetics and pathways for application-relevant integrated process designs and connect diverse literature on the oxidation of transition metal dichalcogenides, Se polymerization and crystallization studies, and prior synthetic strategies for producing Se nanowires.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7608–7615 7608–7615"},"PeriodicalIF":5.3,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://pubs.acs.org/doi/epdf/10.1021/acsanm.5c00308","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Aptamer-Based Trimeric DNA Nanostructure for High-Affinity Recognition of Allergenic Protein","authors":"Yuefei Zhou,&nbsp;Junmei Feng,&nbsp;Lili Yao,&nbsp;Jie Wang,&nbsp;Hao Qu,&nbsp;Yu Mao* and Lei Zheng,&nbsp;","doi":"10.1021/acsanm.4c0730010.1021/acsanm.4c07300","DOIUrl":"https://doi.org/10.1021/acsanm.4c07300https://doi.org/10.1021/acsanm.4c07300","url":null,"abstract":"<p >The detection of trace amounts of the peanut allergenic protein Ara h1, a critical food allergen linked to severe allergic reactions, is vital for the effective prevention of allergic disorders. The unique homotrimeric shape of Ara h1 presents the opportunity to create a homotrimeric molecular recognition element that is perfectly matching its structural scaffold, thereby significantly enhancing binding affinity. The tetrahedral DNA nanostructure scaffold exhibits an edge length of approximately 5.8 nm, with three vertex-extended arms specifically conjugated to TCAPT1. Here, an asymmetrical dumbbell-shaped monomeric DNA aptamer that specifically binds to Ara h1 was first obtained from a prestructured DNA library via magnetic graphene oxide (MGO) based SELEX. This aptamer was subsequently tailored and engineered into a trimeric DNA nanostructure to align spatially with the homotrimeric configuration of Ara h1, achieving a significantly improved binding affinity with a dissociation constant (<i>K</i>_d) of 3.8 nM. To demonstrate the practical application of this valence-matched trimeric DNA nanostructure in sensitive Ara h1 detection, a fluorescent assay was developed using MGO-based platform, capable of detecting Ara h1 with a detection limit as low as 0.4 nM. The proposed approach further demonstrated high selectivity and recovery rates, underscoring its potential for precise detection of the peanut allergen Ara h1 in complex food matrices.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7501–7509 7501–7509"},"PeriodicalIF":5.3,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842422","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}

{"title":"MnO2 Nanoflakes Anchored on N-Doped Carbon Nanotubes for Lithium Storage","authors":"Hanfeng Wu,&nbsp;Le Jiang,&nbsp;Jiaqi Liu,&nbsp;Yanyang Jin,&nbsp;Shuo Dong,&nbsp;Xiaowei Shi,&nbsp;Yongjun Yuan,&nbsp;Wangfeng Bai and Shiting Wu*,&nbsp;","doi":"10.1021/acsanm.5c0041810.1021/acsanm.5c00418","DOIUrl":"https://doi.org/10.1021/acsanm.5c00418https://doi.org/10.1021/acsanm.5c00418","url":null,"abstract":"<p >Nano-MnO₂ integrated with conductive carbon has been surfaced as an opportune anode for high-performance lithium ion batteries (LIBs). However, MnO₂ assembled in nanotube form that is more conducive to Li⁺ diffusion has been desperate for a simple and efficient preparation approach. Here, through a straightforward solution method, we construct an innovative sandwich-like architecture based on wide graphitic carbon nanotubes, of which the dual surfaces are anchored by a conductive polymer (polypyrrole, PPy) and MnO₂ nanoflakes layer by layer. The N-doped interior carbon layer derived from annealed PPy favors enhanced conductivity for rapid Li⁺ transport, and benefiting from the wide cavity of nanotubes, nano-MnO₂ is heavily loaded, and the severe volume variation could be effectively suppressed to preserve the anode integrity. As a result, such a hybrid anode with over 65% MnO₂ loading reveals stable cycling capacity, reinforced rate capability, and a long service life, achieving 1401.30 mA h/g in 150th cycle at 100 mA/g and 211.43 mA h/g, with Coulombic efficiency close to 100% after 6000 cycles at 2000 mA/g. Detailed electrochemical measurements confirm the critical role of PPy in facilitating fast lithium storage and rapid Li⁺ diffusion, and the electrochemical behavior of carbon, MnO₂, and their hybrids is also analyzed. Hence, we believe this work would provide valuable insights for the development of next-generation LIBs based on metal oxides.</p>","PeriodicalId":6,"journal":{"name":"ACS Applied Nano Materials","volume":"8 15","pages":"7630–7641 7630–7641"},"PeriodicalIF":5.3,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143842427","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}