Nano Energy最新文献_第7页

Fluid dynamics meets energy harvesting: Enhancing triboelectric nanogenerators and piezoelectric energy harvester through CFD 流体动力学与能量收集：通过CFD增强摩擦纳米发电机和压电能量收集器

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-08 DOI: 10.1016/j.nanoen.2025.111578

Hossein Ali Kamali , Erming Su , Leo N.Y. Cao , Omid Mahian , Abbasali Abouei Mehrizi , Dengwei Jing , Zhong Lin Wang

Piezoelectric and triboelectric nanogenerators are unique devices that convert mechanical energy, e.g., fluid motion or mechanical vibration into electrical energy. Their significant advantages, such as their small scale, eco-friendly operation, and adaptability to various conditions, including humid, vibrating, and temperature-variable environments, make them perfect for green energy harvesting in aquatic and windy contexts. However, the interaction between the fluid and the specific design of the related energy-harvesting machine is complex. Advanced computational fluid dynamics (CFD) methods enable the simulation of complicated interactions of fluids and structures, leading to a better understanding of the effects of fluid flow on energy conversion efficiency. This review article discusses the role of CFD in design optimization and performance improvement of piezoelectric and triboelectric nanogenerators for renewable energy harvesting applications in harsh environments. Selecting an appropriate and effective CFD method coupled with other numerical methods that can accurately simulate the complex multiphysics, including fluid motion interaction, material stress, and electromechanical coupling, in piezoelectric and triboelectric nanogenerators will enable optimum design at reduced manufacturing and experimental testing costs. This paper provides an applicable guideline for using CFD tools to model energy harvesting devices that utilize piezoelectric and triboelectric nanogenerators and enhance their efficiency.

压电和摩擦电纳米发电机是将机械能（例如流体运动或机械振动）转换为电能的独特装置。它们的显著优势，例如它们的小规模，环保操作，以及对各种条件的适应性，包括潮湿，振动和温度变化的环境，使它们成为水生和多风环境中绿色能源收集的完美选择。然而，流体与相关能量收集机的具体设计之间的相互作用是复杂的。先进的计算流体动力学（CFD）方法能够模拟流体与结构的复杂相互作用，从而更好地理解流体流动对能量转换效率的影响。本文综述了CFD在压电和摩擦电纳米发电机设计优化和性能改进中的作用，以用于恶劣环境下的可再生能源收集。选择合适且有效的CFD方法与其他数值方法相结合，能够准确模拟压电和摩擦电纳米发电机中复杂的多物理场，包括流体运动相互作用、材料应力和机电耦合，将在降低制造和实验测试成本的情况下实现优化设计。本文为利用CFD工具对利用压电和摩擦电纳米发电机的能量收集装置进行建模并提高其效率提供了一个适用的指导方针。

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引用次数: 0

Calendar aging of sulfide all-solid-state batteries 硫化物全固态电池的日历老化

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-07 DOI: 10.1016/j.nanoen.2025.111576

Yujing Wu , Ziqi Zhang , Dengxu Wu , Fuqiang Xu , Mu Zhou , Hong Li , Liquan Chen , Fan Wu

Sulfide solid-state electrolytes (SEs), prized for high ionic conductivity and mechanical strength, face practical challenges due to multi-field coupling failures under operational stresses. While prior studies emphasize electrochemical degradation (e.g., interfacial reactions, Li dendrites), thermal failure mechanisms during high-temperature storage remain overlooked. This work systematically explores calendar aging in sulfide-based all-solid-state batteries (ASSBs). Among tested systems, LiCoO₂ (LCO), Li₆PS₅Cl, and Li-In alloy exhibit superior stability after high-temperature storage. However, high-voltage LiNi_0.8Co_0.1Mn_0.1O₂ (NCM811) undergoes structural collapse, releasing decomposition products that accelerate interfacial reactions and thermal failure. Batteries at high states of charge (SOC) experience intensified self-discharge-driven electrode-electrolyte reactions at elevated temperatures. In contrast, LCO-Li₆PS₅Cl-LiIn ASSBs at 0 SOC retain nearly undegraded performance after 5 days at 90°C. Suppressing the detrimental H3-phase transition in NCM811 improves capacity retention by ≥ 21 %. The study elucidates high-temperature degradation pathways in sulfide ASSBs, linking thermo-electro-chemical coupling effects to interfacial ion transport barriers and contact degradation. These insights advance the understanding of calendar aging mechanisms, providing critical guidance for predicting battery lifespan and designing robust electrode/electrolyte systems.

硫化物固态电解质（SEs）因其高离子电导率和机械强度而备受赞誉，但由于在工作应力下的多场耦合失效，它面临着实际挑战。虽然先前的研究强调电化学降解（例如界面反应，Li枝晶），但高温储存过程中的热失效机制仍然被忽视。本研究系统地探讨了硫化物基全固态电池（assb）的日历老化问题。在所测试的体系中，LiCoO₂（LCO）、Li6PS5Cl和Li-In合金在高温储存后表现出优异的稳定性。然而，高压LiNi0.8Co0.1Mn0.1O₂（NCM811）发生结构崩溃，释放分解产物，加速界面反应和热失效。高荷电状态（SOC）电池在高温下经历了强化的自放电驱动的电极-电解质反应。相比之下，LCO-Li6PS5Cl-LiIn assb在0 SOC下在90°C下放置5天后几乎保持不变的性能。抑制NCM811中有害的h3相转变可使容量保持率提高≥21%。该研究阐明了硫化物assb的高温降解途径，将热电化学耦合效应与界面离子传输屏障和接触降解联系起来。这些见解促进了对日历老化机制的理解，为预测电池寿命和设计稳健的电极/电解质系统提供了重要指导。

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引用次数: 0

Alternating magnetic field-enhanced electrocatalysis: Mechanisms, synergistic effects, and future perspectives 交变磁场增强电催化：机制、协同效应和未来展望

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-07 DOI: 10.1016/j.nanoen.2025.111573

Karina E. Trotsenko , Ilia D. Shabalkin , Elena F. Krivoshapkina, Pavel V. Krivoshapkin

Sustainable energy conversion is closely associated with electrocatalytic processes such as carbon dioxide reduction and water splitting reactions. However, their large-scale industrial application remains limited due to the efficiency constraints. The application of alternating magnetic field (AMF) has been considered as a strategy to improve electrocatalytic performance and overcome key limitations in electrocatalysis. The AMF influences electrocatalytic activity through several effects such as magnetohydrodynamic, spin polarisation and magnetothermal effects. Here, a systematic analysis of these effects is provided, highlighting their impact on reaction kinetics, mass transport, and overall efficiency. Unexpected synergistic effects and novel dependencies have been emphasized. In addition to these effects, magnetoelectric materials are considered as promising materials to perform electrocatalytic reactions.

可持续能源转换与二氧化碳还原和水分解反应等电催化过程密切相关。然而，由于效率的限制，它们的大规模工业应用仍然受到限制。交变磁场（AMF）的应用已被认为是提高电催化性能和克服电催化关键局限性的一种策略。AMF通过磁流体力学效应、自旋极化效应和磁热效应等影响电催化活性。在这里，提供了这些效应的系统分析，突出了它们对反应动力学、质量传递和总体效率的影响。强调了意想不到的协同效应和新的依赖关系。除了这些效应外，磁电材料被认为是进行电催化反应的有前途的材料。

引用次数: 0

High-performance green untethered non-contact triboelectric nanogenerator based on recycled leaf-derived graphite-like carbons for efficiently natural energy harvesting and self-powered intelligent classification 基于可回收叶衍生类石墨碳的高效自然能量收集和自供电智能分类的高性能绿色无系绳非接触摩擦电纳米发电机

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-07 DOI: 10.1016/j.nanoen.2025.111572

Lei Li , Bing-Yan Xie , Wei-Chun Yang , Wei-Chen Peng , Yi-Ting Chen , Tzu-Ching Lu , Li-Yen Lee , Ming-Han Lu , Jiun-Wei Fong , Kai-Yuan Hsiao , Jiann-Yeu Chen , Ming-Yen Lu , Kuan-Chang Chang , Ying-Chih Lai

Triboelectric nanogenerators (TENGs) show promise for energy harvesting and self-powered sensing in Internet-of-Things (IoT) applications; however, material wear and performance degradation under repeated operation remain key challenges. Here, we present a high-performance untethered and mechanically-durable non-contact TENG that efficiently harvests mechanical energy from object motions and natural stimuli such as wind and rain, functioning as both sustainable energy source and self-powered sensing device. The TENG is engineered from tunable multifunctional composites derived from graphite-like carbonized fallen leaves, creating a stretchable conductor and triboelectric charges reservoir integrated with charge trapping, transport, and storage capabilities. This synergistic design maximizes charge generation while enhancing retention (4000 minutes) and output performance (95.1 V) under non-contact operation. The device maintains functionality under 100 % tensile strain for over 1000 cycles and even in high humidity (∼95 %). It efficiently scavenges wind and rain energy and enables to power electronics at a 2 mm separation distance in non-contact mode. Furthermore, its self-powered contactless sensing enables an intelligent classification system capable of accurately identifying different egg types, highlighting its potential in smart agriculture. This eco-friendly carbonized-leaf-derived non-contact TENG promotes sustainable material recycling while advancing renewable energy harvesting and intelligent sensing for self-sufficient agricultural applications.

摩擦电纳米发电机（TENGs）在物联网（IoT）应用中显示出能量收集和自供电传感的前景；然而，反复操作下的材料磨损和性能下降仍然是主要挑战。在这里，我们提出了一种高性能的无系绳和机械耐用的非接触式TENG，它可以有效地从物体运动和自然刺激（如风和雨）中获取机械能，既可以作为可持续能源，又可以作为自供电的传感装置。TENG是由石墨样碳化落叶中提取的可调谐多功能复合材料制成的，创造了一个可拉伸的导体和具有电荷捕获、传输和存储能力的摩擦电荷储存器。这种协同设计最大限度地提高了电荷产生，同时增强了非接触操作下的保持时间（4,000分钟）和输出性能（95.1 V）。该设备在100%拉伸应变下保持功能超过1000次循环，甚至在高湿度（~95%）下也能保持功能。它有效地清除风能和雨水能量，并在非接触模式下，在2毫米的分离距离内为电子设备供电。此外，它的自供电非接触式传感使智能分类系统能够准确识别不同的鸡蛋类型，突出了其在智能农业中的潜力。这种环保的碳化叶片衍生的非接触式TENG促进可持续材料回收，同时推进可再生能源收集和智能传感，用于自给自足的农业应用。

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引用次数: 0

Achieving stable brine oxidation at 4 A cm−2 by engineering kinetics-favorable electrodes based on an OH−-conducting hydroxide nanocatalyst 基于OH -导电氢氧化物纳米催化剂的工程动力学有利电极在4 A cm - 2下实现稳定的盐水氧化

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-06 DOI: 10.1016/j.nanoen.2025.111575

Jing Wang , Yanqi Li , Bingbing Sun , Chi Zhang , Zhangyi Tao , Zehui Yang , Ming Ge , Lixia Yang , Xiaolei Yuan , Zhao Cai

The sustained electrolysis of low-grade water at ultrahigh current densities represents a critical pathway for cutting the price of green hydrogen, promoting the practical application of hydrogen energy, and advancing global energy decarbonization. Here, we developed an OH⁻-conducting hydroxide catalyst material with a high ionic conductivity of 6.21 ×10⁻⁴ S cm⁻¹, based on which a kinetics-favorable electrode was constructed and stable brine electrolysis hydrogen production at 4 A cm⁻² was achieved. Simultaneously featuring mm-scale interconnected pores for electron conductivity, μm-scale superwetting array structure for mass transfer, nm-scale negatively charged surface for Cl⁻ repulsion, and atomic-scale vacancy channels for OH⁻ conduction, the as-designed kinetics-favorable electrode delivered an exceptionally low overpotential of 276 mV at an industrial current density of 400 mA cm⁻² with a small Tafel slope of 31.5 mV dec⁻¹. More significantly, the alkaline brine electrolyzer assembled by the as-achieved anode and a commercial Ni mesh cathode showed stable hydrogen production performance at an ultrahigh current density of 4 A cm⁻² for 300 h, manifesting one of the best seawater electrolyzers to date, highlighting the significance of engineering kinetics-favorable electrodes on the breakthrough of performance bottlenecks in brine electrolysis hydrogen production.

在超高电流密度下持续电解低品位水，是降低绿色氢价格、促进氢能实用化、推进全球能源脱碳的重要途径。在此，我们开发了一种离子电导率为6.21×10 - 4 S cm - 1的OH -导电氢氧化物催化剂材料，并在此基础上构建了有利于动力学的电极，实现了4 a cm - 2的稳定盐水电解制氢。同时，该电极具有毫米级的互连孔（用于电子传导）、μ级的超湿阵列结构（用于传质）、纳米级的负电荷表面（用于Cl -排斥）和原子级的空位通道（用于OH -传导），在工业电流密度为400 mA cm - 2时，其过电位极低，为276 mV，塔非斜率很小，为31.5 mV dec - 1。更重要的是，在4 a cm（⁻²）的超高电流密度下，用镍网阴极和阳极组装的碱性盐水电解槽在300 h下表现出稳定的产氢性能，是迄今为止最好的海水电解槽之一，突出了工程动力学有利电极对突破盐水电解制氢性能瓶颈的意义。

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引用次数: 0

Thermochromic fiber-based self-powered detection system for maritime oil spill monitoring and fire safety applications 基于热致变色纤维的自供电探测系统在海上溢油监测和消防安全中的应用

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-06 DOI: 10.1016/j.nanoen.2025.111569

Hakjeong Kim , Arnab Pal , Jaewon Cho , Abdullah Mohamed Al-Kabbany , Kuldeep Kaswan , Ravindra Joshi , Seongmin Na , Jihun Lee , Kyungwho Choi , Miso Kim , Dukhyun Choi , Zong-Hong Lin

Maritime oil spills and fire hazards pose significant threats to environmental safety, marine ecosystems, and critical infrastructure, demanding rapid and reliable detection strategies. In this work, we present a dual-functional smart thermochromic fiber-based self-powered detection platform designed to address these urgent safety challenges. The system integrates poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) and polydiacetylene (PDA) composite nanofibers with triboelectric nanosensor (TENS) technology, enabling real-time detection for maritime oil spill monitoring and fire safety applications. The engineered nanofibers exhibit strong oleophilicity toward hydrocarbons and hydrophobicity toward water, allowing robust discrimination between oil and seawater through distinct triboelectric voltage signatures. Temperature-dependent studies reveal systematic modulation of work function and surface potential, resulting in enhanced triboelectric output during contact electrification. These findings are further supported by density functional theory (DFT) simulations, which confirm the temperature-induced changes in work function. Moreover, the TENS demonstrates a rapid response of 630 ms and sub-threshold multi-target sensing capabilities. When integrated with a wireless transmission module, it enables continuous autonomous monitoring without the need for external power sources. This makes the system particularly well suited for deployment in maritime environments and high-risk fire zones. Overall, this innovative sensing platform offers a promising approach for advanced environmental safety monitoring and has potential applications in smart cities, autonomous vehicles, and next-generation wearable safety devices, paving the way for real-time, distributed hazard detection and disaster prevention.

海上石油泄漏和火灾危害对环境安全、海洋生态系统和关键基础设施构成重大威胁，需要快速可靠的检测策略。在这项工作中，我们提出了一种双功能智能热致变色纤维自供电检测平台，旨在解决这些紧迫的安全挑战。该系统将聚氟乙烯-共六氟丙烯（PVDF-HFP）和聚二乙炔（PDA）复合纳米纤维与摩擦电纳米传感器（TENS）技术集成在一起，可实现海上溢油监测和消防安全应用的实时检测。这种工程纳米纤维对碳氢化合物具有很强的亲油性，对水具有疏水性，可以通过不同的摩擦电压特征来区分石油和海水。温度相关的研究揭示了功函数和表面电位的系统调制，导致接触电气化过程中摩擦电输出增强。密度泛函理论（DFT）模拟进一步证实了温度引起的功函数变化。此外，TENS具有630毫秒的快速响应和亚阈值多目标感知能力。当与无线传输模块集成时，它可以在不需要外部电源的情况下进行连续自主监测。这使得该系统特别适合在海上环境和高风险火区部署。总体而言，这种创新的传感平台为先进的环境安全监测提供了一种有前途的方法，并在智能城市、自动驾驶汽车和下一代可穿戴安全设备中具有潜在的应用前景，为实时、分布式的危害检测和灾害预防铺平了道路。

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引用次数: 0

Etching amorphous components to optimize carbon crystalline micro-environment in hard carbon and boosting of low-potential sodium-ion storage with improved rate capability 在硬碳中蚀刻非晶晶以优化碳晶微环境，提高低电位钠离子储存速率

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-06 DOI: 10.1016/j.nanoen.2025.111577

Hua Wang , Fei Sun , Peidi Luo , Dongyang Wu , Junfeng Li , Jihui Gao , Jiajun Wang , Jianmin Gao

The energy density of sodium-ion batteries depends significantly on advanced carbon anodes design, where optimizing crystallinity and porosity is critical for improving both Na⁺ storage and rate capability. Herein, a facile pre-etching strategy is proposed to prepare high-performance coal-based hard carbon to selectively remove amorphous components and reconstruct carbon crystalline micro-environment, thereby enabling all-round improvements in Na⁺ storage properties. Pre-etching at 400°C selectively decomposes the unripe components including aliphatic and hydrogenated sidechain structures within complex coal matrix to release spatial freedom for coal-based microcrystalline rearrangement, thereby enabling the formation of isotropic-oriented carbon microcrystalline with enlarged interlayer spacing, reduced amorphous carbon and augmented sub-nanopores. Particularly, benefiting from the optimized microcrystalline and porosity, the obtained carbon anode achieves the state-of-the-art comprehensive performance for coal-derived hard carbons, delivering a reversible capacity up to 333 mAh g⁻¹ with a greatly upgraded low-potential plateau of 248 mAh g⁻¹ and an improved rate capability (203 mAh g⁻¹ at 1 C). The constructed full battery can exhibit an energy density of 240 Wh kg⁻¹ with a voltage of 3.23 V. Our strategy is easily compatible with existing production lines, and achieves a comprehensive yield exceeding 60 %, holding significant potentials for directly converting coal precursor to advanced carbon anodes.

钠离子电池的能量密度很大程度上取决于先进的碳阳极设计，其中优化结晶度和孔隙度对于提高Na+存储和倍率能力至关重要。本文提出了一种简单的预蚀刻策略，制备高性能煤基硬碳，选择性去除非晶成分，重建碳晶微环境，从而全面提高Na+的存储性能。400℃预蚀刻可选择性地分解复杂煤基体中的未成熟组分，包括脂肪族和氢化侧链结构，释放煤基微晶重排的空间自由度，从而形成层间距扩大、非晶态碳减少、亚纳米孔增加的各向异性碳微晶。特别是，得益于优化的微晶和孔隙率，所获得的碳阳极实现了最先进的煤衍生硬碳的综合性能，提供高达333 mAh g-1的可逆容量，大大提升了248 mAh g-1的低电位平台和提高的倍率能力（1℃时203 mAh g-1）。该电池在3.23 V电压下的能量密度为240 Wh kg-1。我们的战略很容易与现有生产线兼容，综合收率超过60%，在直接将煤前驱体转化为高级碳阳极方面具有很大的潜力。

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引用次数: 0

Boosting alkaline photoelectrocatalytic hydrogen evolution via Pt-Ag electronic hybridization and plasmon-molecule interactions 通过Pt-Ag电子杂交和等离子体-分子相互作用促进碱性光电催化析氢

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-06 DOI: 10.1016/j.nanoen.2025.111574

Carice Chong , Siew Kheng Boong , Tharishinny Raja Mogan , Joelle Mun Kit Loh , Yimeng Ni , Sankar Das , Haitao Li , Hamidreza Arandiyan , Bingquan Wu , Hiang Kwee Lee

Photoelectrocatalytic hydrogen evolution reaction (HER) combines green photons and electrons for water splitting, but current approaches face poor catalytic performance due to high water dissociation barriers and random water-catalyst interactions, particularly in alkaline conditions. Here, we boost alkaline HER by introducing a multi-functional photoelectrocatalyst based on plasmonic-active, platinum-coated Ag nanocube (AgNC@Pt). This design leverages bimetallic hybridization to enhance catalytic activity and utilizes plasmons to manipulate interfacial water molecules for facilitating HER. Under light irradiation, AgNC@Pt reduces overpotential from 0.112 V to 0.094 V vs. RHE, corresponding to a 1.2-fold improvement and the Tafel slope value reduces from 92 mV dec⁻¹ to 85 mV dec⁻¹, indicating a 1.1-fold enhancement in HER kinetics. It also outperforms the gold standard Pt/C at overpotentials beyond −0.22 V, achieving a superior current density of −0.091 A cm⁻² (-0.45 V vs. RHE) and reducing overpotential by 15 % at 70 mA cm⁻². Our catalyst exhibits overpotential and Tafel slope that are > 8-fold (0.094 V for AgNC@Pt and 0.755 V for emerging platform) and 1.2-fold better, respectively, than emerging designs in alkaline environments. Mechanistic studies reveal that the electron-rich Pt surface and plasmonic effects are crucial for aligning water molecules on the catalyst, thereby facilitating electron transfer and proton discharge to kinetically enhance HER. By harnessing both chemical and plasmonic effects to modulate water microenvironment at the point-of-catalysis, our design offers valuable insights for achieving efficient H₂ generation in practical neutral/alkaline conditions.

光电催化析氢反应（HER）结合绿色光子和电子进行水分解，但目前的方法由于高水解离障碍和随机的水-催化剂相互作用而面临催化性能差的问题，特别是在碱性条件下。在这里，我们通过引入一种基于等离子体活性铂包覆银纳米立方体的多功能光电催化剂来提高碱性HER （AgNC@Pt）。该设计利用双金属杂交来增强催化活性，并利用等离子体操纵界面水分子来促进HER。与RHE相比，在光照下AgNC@Pt将过电位从0.112 V降低到0.094 V，相当于提高了1.2倍；Tafel斜率值从92 mV dec1降低到85 mV dec1，表明HER动力学提高了1.1倍。它在超过-0.22 V的过电位下也优于金标准Pt/C，实现了-0.091 a cm-2的优越电流密度（相对于RHE为-0.45 V），并在70 mA cm-2时将过电位降低了15%。我们的催化剂在碱性环境下的过电位和塔菲尔斜率分别是新兴设计的8倍（AgNC@Pt为0.094 V，新兴平台为0.755 V）和1.2倍。机理研究表明，富电子Pt表面和等离子体效应对水分子在催化剂上的排列至关重要，从而促进电子转移和质子放电，从而在动力学上增强HER。通过利用化学和等离子体效应来调节催化点的水微环境，我们的设计为在实际的中性/碱性条件下实现高效的H2生成提供了有价值的见解。

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引用次数: 0

Atomic-level modulated selenides lattice for ultra-stable rechargeable aluminum-ion batteries 用于超稳定可充电铝离子电池的原子级调制硒化物晶格

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-06 DOI: 10.1016/j.nanoen.2025.111566

Chunhao Sun , Yongde Long , Pengcheng liu , Gang Zhou , Hongruo Ma , Kai Du , Mingshan Han , Ruiwen Shao , Yuxiang Hu , Kun Zheng

Rechargeable aluminum-ion batteries (RABs) are promising generation energy storage systems due to their abundance, intrinsic safety, and high energy density. However, the inherently high charge density of aluminum-ion usually leads to the low practical capacity and unsatisfactory stability towards current cathode materials, such as transition metal chalcogenides. To overcome the limitations towards conventional materials, we first-timely propose a series of high-entropy selenides (HESes) with rapid electron transfer efficiency and drastically enhanced lattice tolerance for high-performance RABs. Multi-atomic hybridization effects and broadened the d-band of optimized Multiple high-entropy selenide (MHESe) significantly improve the kinetics process with a high practical capacity (385.0 Wh kg⁻¹ at 808.0 W kg⁻¹) and rate-performance (155.5 mAh g⁻¹ at 10.0 A g⁻¹). More importantly, benefiting from the long-range disordered and intrinsic robust lattice strain field, the newly developed MHESe cathodes achieve one of best long-term stability (over 94.4 mAh g⁻¹ after 10,000 cycles at a high current density of 10.0 A g⁻¹) in RABs. Overall, atomic-level engineered materials with strong lattice distortions and “cocktail effects” through high-entropy engineering pave novel pathways for RABs and next-generation energy storage systems.

可充电铝离子电池（RABs）具有丰度高、本质安全、能量密度高等优点，是一种极具发展前景的发电储能系统。然而，铝离子固有的高电荷密度往往导致其实际容量较低，对于目前的正极材料，如过渡金属硫族化合物，稳定性不理想。为了克服传统材料的局限性，我们首次提出了一系列高熵硒化物（HESes），它们具有快速的电子转移效率和大幅提高的晶格容限，可用于高性能RABs。优化后的多原子杂化效应和增宽的d波段显著改善了复合高熵硒化物（MHESe）的动力学过程，具有较高的实际容量（808.0 W kg−1时385.0 Wh kg−1）和速率性能（10.0 a g−1时155.5 mAh g−1）。更重要的是，得益于远程无序和固有的强大晶格应变场，新开发的MHESe阴极在RABs中获得了最佳的长期稳定性（在10.0 a g−1的高电流密度下，经过10,000次循环后超过94.4 mAh g−1）。总的来说，通过高熵工程，具有强晶格扭曲和“鸡尾酒效应”的原子级工程材料为RABs和下一代储能系统铺平了新的道路。

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引用次数: 0

Sulfonated ether-free polybenzimidazole membrane with fast and selective ion transport enabling ultrahigh cycle stability in vanadium redox flow batteries 无磺化醚多苯并咪唑膜，具有快速和选择性离子传输，可实现钒氧化还原液流电池的超高循环稳定性

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-06 DOI: 10.1016/j.nanoen.2025.111570

Hui Yan , Wei Wei , Xin Li , Qi-an Zhang , Ying Li , Ao Tang

Non-perfluorinated membranes featuring low cost and high vanadium selectivity have recently become a promising candidate for use in vanadium redox flow batteries (VRFBs). However, long-term operation performance of non-perfluorinated membranes in VRFBs is still significantly hindered by low proton conductivity and inferior anti-oxidation stability in high oxidized V^5 + solutions. Herein, we delicately design a sulfonated ether-free poly [2,2’-(1,4-naphthalene)-5,5’-bibenzimidazole] (SNPBI) membranes via aromatic nucleophilic substitution polycondensation for VRFBs, which synergistically improves proton conductivity and enhances anti-oxidation stability. The optimized SNPBI-140 membrane demonstrates superior mechanical robustness (tensile strength of 35.7 MPa) and anti-oxidant stability, coupled with remarkable proton/vanadium ion selectivity (23.41 mS cm⁻¹ proton conductivity vs. ultralow vanadium permeability of 7.19 × 10⁻⁹ cm² s⁻¹). Theoretical calculations unravel that the sulfonic acid groups facilitate proton transport through continuous ionic channels, whereas protonated imidazole moieties establish electrostatic barriers against vanadium ion crossover, endowing SNPBI-140 with outstanding proton selectivity. Leveraging these advantages, the VRFB adopting SNPBI-140 membrane achieves unprecedented cycling performance, maintaining 99.5 % coulombic efficiency and 80.6 % energy efficiency at 200 mA cm⁻² for 6000 consecutive cycles—outperforming state-of-the-art membranes and demonstrating its promise for long-term and high-performance VRFB operation.

近年来，低成本、高钒选择性的非全氟膜已成为钒氧化还原液流电池（VRFBs）的一个有希望的候选材料。然而，在高氧化V5 +溶液中，低质子电导率和较差的抗氧化稳定性仍然严重阻碍了vrfb中非全氟膜的长期运行性能。本研究通过芳香族亲核取代缩聚，为vrfb精心设计了一种磺化无醚聚[2,2 ' -（1,4-萘）-5,5 ' -双苯并咪唑]（SNPBI）膜，该膜协同提高了质子电导率，增强了抗氧化稳定性。优化后的SNPBI-140膜具有优异的机械稳健性（抗拉强度为35.7 MPa）和抗氧化稳定性，并具有显著的质子/钒离子选择性（质子电导率为23.41 mS cm−1，钒离子渗透率为7.19 × 10−9 cm2 s−1）。理论计算表明，磺酸基促进了质子通过连续离子通道的传输，而质子化的咪唑基则建立了钒离子交叉的静电屏障，使SNPBI-140具有出色的质子选择性。利用这些优势，采用SNPBI-140膜的VRFB实现了前所未有的循环性能，在200 mA cm−2下连续6000次循环保持99.5% %的库仑效率和80.6 %的能量效率，优于最先进的膜，并展示了其长期高性能VRFB运行的前景。

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