Journal of Colloid and Interface Science最新文献_第5页

Constructing dual-ligand Ce-MOF on graphene oxide modified with polydopamine endowing polyurethane coating with long-term smart anti-corrosion and mechanical robustness. 在聚多巴胺修饰的氧化石墨烯上构建双配体 Ce-MOF ，赋予聚氨酯涂层长期智能防腐和机械坚固性。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-12 DOI: 10.1016/j.jcis.2024.11.047

Wuyang Li, Chan Xie, Peng Zhang, Zhonghao Zhang, Mingshan Xue, Zuozhu Yin, Yidan Luo, Zhen Hong

Traditional mono-functional anti-corrosion coatings are unable to meet the long-term corrosion resistance requirements of metal materials, therefore developing multifunctional anti-corrosion coatings have broad application prospects. In this work, long-lasting anti-corrosion coatings with superhydrophobic and self-healing properties were successfully prepared by in-situ growth of dual-ligand cerium-based metal-organic framework (Ce-MOF) on the surface of graphene oxide (GO), followed by chemical modification with polydopamine (PDA), resulting in 5B level of adhesion and excellent mechanical robustness. The superhydrophobic surface, as the external armor of the coating, can effectively block the penetrating path of corrosive media. Meanwhile, the MOF structure formed by the coordination of 2-mercaptobenzimidazole (2-M) with cerium ions endows the coating with smart self-healing properties and long-lasting corrosion resistance. Electrochemical tests showed that the low-frequency impedance modulus value of the superhydrophobic coating still reached 3.82 × 10⁸ Ω cm² after 30 days salt immersion. Due to the formation of protective films and insoluble precipitates at the defect site by 2-M and cerium ions, the scratches on the coating were significantly reduced after 40 days salt spray experiment, demonstrating the self-healing ability of the coating. This multifunctional anti-corrosion coating provides a new approach for preparing coatings with long-term effective corrosion resistance.

传统的单功能防腐涂料无法满足金属材料的长效防腐要求，因此开发多功能防腐涂料具有广阔的应用前景。本研究通过在氧化石墨烯（GO）表面原位生长双配体铈基金属有机框架（Ce-MOF），然后用多巴胺（PDA）进行化学修饰，成功制备了具有超疏水和自修复性能的长效防腐涂层，从而获得了 5B 级的附着力和优异的机械坚固性。超疏水表面作为涂层的外部装甲，能有效阻挡腐蚀性介质的渗透路径。同时，2-巯基苯并咪唑（2-M）与铈离子配位形成的 MOF 结构赋予了涂层智能自修复特性和持久耐腐蚀性能。电化学测试表明，在盐水浸泡 30 天后，超疏水涂层的低频阻抗模量值仍能达到 3.82 × 108 Ω cm2。由于 2-M 和铈离子在缺陷部位形成了保护膜和不溶性沉淀物，40 天盐雾实验后涂层上的划痕明显减少，证明了涂层的自修复能力。这种多功能防腐蚀涂层为制备具有长期有效防腐蚀性能的涂层提供了一种新方法。

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引用次数: 0

Coupled electrostatic induction strategy toward polyaniline-derived hard carbon with uniformly microporous boosts high-rate sodium storage 针对具有均匀微孔的聚苯胺衍生硬碳的耦合静电感应策略可提高钠的高储存率。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-12 DOI: 10.1016/j.jcis.2024.11.067

Hui Peng , Bo Tao , Zhiyuan Liu, Wenxing Miao, Wenbo Hou, Zhe Zhang, Guofu Ma

Constructing a uniform and controllable hard carbon anode with suitable micropores can effectively improve the overall sodium storage performance. Herein, an electrostatic induction strategy was used to change the structure of micelles by adding surfactant content to form polyaniline (PANI) with different morphologies. The presented synthesis method is characterized by the introduction of oppositely charged surfactants to induce rapid nucleation and the formation of foams with small pore sizes, which are then transformed into homogeneous microcellular pores by high-temperature carbonization. Thus, the microporous structures in hard carbon anode provide excellent electrochemical storage sites for sodium ion storage. As a consequence, the sodium dodecyl benzene sulfonate (SDBS) electrostatic induced PANI-derived hard carbon (SD-HC) showed a uniform pore structure with low surface area (14.54 m² g⁻¹) and uniform micropores (1.54 nm), which used as an anode material for sodium storage can provided high reversible capacity of 282.4 mAh g⁻¹ at 50 mA/g, excellent rate performance (196 mAh g⁻¹ at 5 A/g) and cycling stability (93.3 % capacity retention after 1000 cycles at 1 A/g). This simple and efficient synthesis strategy provides an effective guide for the design of nanostructures for the preparation of similar functional polymeric materials.

构建具有合适微孔的均匀且可控的硬碳阳极可有效提高整体钠存储性能。本文采用静电诱导策略，通过添加表面活性剂来改变胶束的结构，从而形成不同形态的聚苯胺（PANI）。该合成方法的特点是引入带相反电荷的表面活性剂，诱导快速成核并形成孔径较小的泡沫，然后通过高温碳化将其转化为均匀的微孔。因此，硬碳阳极中的微孔结构为钠离子储存提供了极佳的电化学储存场所。因此，十二烷基苯磺酸钠（SDBS）静电诱导的 PANI 衍生硬碳（SD-HC）呈现出均匀的孔隙结构，具有较低的表面积（14.54 m2 g-1）和均匀的微孔（1.54 nm），用作储钠阳极材料可提供高可逆容量（50 mA/g 时为 282.4 mAh g-1）、优异的速率性能（5 A/g 时为 196 mAh g-1）和循环稳定性（1 A/g 时循环 1000 次后容量保持率为 93.3%）。这种简单高效的合成策略为制备类似功能聚合物材料的纳米结构设计提供了有效指导。

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引用次数: 0

Magnetic field and photon co-enhanced S-scheme MXene/In2S3/CoFe2O4 heterojunction for high-performance lithium-oxygen batteries 用于高性能锂氧电池的磁场和光子共同增强 S 型 MXene/In2S3/CoFe2O4 异质结。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-12 DOI: 10.1016/j.jcis.2024.11.062

Na Xiao , Ping Han , Zhaoqi Chen , Qiuling Chen

Under the spotlight for their potential to reduce over-potential, photo-assisted Li–O₂ batteries still face a key challenge: the rapid recombination of photo-generated electron-hole pairs, which limits their efficiency. In this study, we address this limitation by designing a Li–O₂ battery that integrates both photo and magnetic field assistance, using an S-scheme MXene/In₂S₃/CoFe₂O₄ heterojunction photocathode. This unique combination enhances visible light absorption and generates a strong built-in electric field, facilitating effective charge separation and boosting photocatalytic activity. During discharge, photo-generated electrons participate in the oxygen reduction reaction, while photo-induced holes contribute to the decomposition of discharge products during charging. Furthermore, the introduction of a magnetic field, confirmed through vibrating sample magnetometer, Mössbauer spectroscopy, X-ray absorption near edge structure, and cyclic voltammetry analyses, enhances electron-hole separation via Lorentz forces and spin–orbit coupling, accelerating the formation and decomposition of Li₂O₂. With this synergistic approach, the battery achieves a high specific capacity of 26,500 mAh g⁻¹, ultra-low oxygen reduction/evolution reaction over-potentials of 0.08 V/0.17 V, and a long cycle life of 2000 cycles with energy efficiency of 98.11 %. This work demonstrates the promising potential of combining photo and magnetic field effects to improve the electrochemical performance of Li–O₂ batteries, opening new avenues for high-performance energy storage systems.

光辅助锂-O2 电池因其降低过电位的潜力而备受关注，但它仍然面临着一个关键挑战：光产生的电子-空穴对的快速重组限制了其效率。在本研究中，我们利用 S 型 MXene/In2S3/CoFe2O4 异质结光电阴极，设计了一种集成了光辅助和磁场辅助的二氧化锰锂电池，从而解决了这一限制。这种独特的组合增强了对可见光的吸收，并产生了强大的内置电场，促进了有效的电荷分离，提高了光催化活性。在放电过程中，光产生的电子参与氧还原反应，而光诱导的空穴则在充电过程中促进放电产物的分解。此外，通过振动样品磁力计、莫斯鲍尔光谱学、X 射线吸收近边缘结构和循环伏安法分析证实，磁场的引入通过洛伦兹力和自旋轨道耦合增强了电子-空穴分离，加速了 Li2O2 的形成和分解。通过这种协同方法，电池实现了 26,500 mAh g-1 的高比容量、0.08 V/0.17 V 的超低氧还原/进化反应过电位，以及 2000 次循环的长循环寿命和 98.11 % 的能量效率。这项研究表明，结合光场和磁场效应来改善锂-O2 电池的电化学性能具有广阔的前景，为高性能储能系统开辟了新的途径。

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引用次数: 0

Cobalt nanoclusters Deposit on Nitrogen-Doped graphene Sheets as bifunctional electrocatalysts for high performance lithium – Oxygen batteries 沉积在掺氮石墨烯片上的钴纳米团簇作为高性能锂-氧电池的双功能电催化剂。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-12 DOI: 10.1016/j.jcis.2024.11.066

Raja Palani , Yi-Shiuan Wu , She-Huang Wu , Jeng-Kuei Chang , Rajan Jose , Chun-Chen Yang

Rechargeable lithium-oxygen (Li-O₂) batteries are being considered as the next-generation energy storage systems due to their higher theoretical energy density. However, the practical application of Li-O₂ batteries is hindered by slow kinetics and the formation of side products during the oxygen reduction and evolution reactions on the cathode. These reactions lead to high overpotentials during charging and discharging. To address these challenges, we propose a simple ultrasonic method for synthesizing cobalt nanoclusters embedded in nitrogen-doped graphene nanosheets (GrZnCo) derived from metal-organic frameworks (MOFs). The resulting material, due to the retention of metallic cobalt structure, exhibits better electronic conductivity. Additionally, the GrZnCo catalyst shows vigorous catalytic activity, which can improve reaction kinetics and suppress side reactions, thus lowering the charging overpotential. We have investigated the impact of different catalyst compositions (GrZnCo_x; x = 1, 3, 5) by varying the amounts of cobalt and zinc. The optimum catalyst, GrZnCo₃, contains high cobalt-N active components, graphitic-N, pyridinic-N, pyrrolic-N, and abundant defect structures, which enhance the electrochemical performance. The defect-rich GrZnCo₃ catalyst enables Li-O₂ batteries to achieve a high discharge capacity of 13500 mAh·g⁻¹ at 50 mA·g⁻¹ and a remarkable long-term cycling performance of over 400 cycles at 100 mA·g⁻¹ with a limited capacity of 500 mAh·g⁻¹. This work demonstrates an effective approach to fabricate cost-effective electrocatalysts for various energy storage systems.

可充电锂-氧（Li-O2）电池因其理论能量密度较高而被视为下一代能量存储系统。然而，锂-氧电池的实际应用却受到阴极氧还原和进化反应中缓慢的动力学和副产品形成的阻碍。这些反应导致充电和放电过程中出现高过电位。为了应对这些挑战，我们提出了一种简单的超声波方法，用于合成嵌入氮掺杂石墨烯纳米片（GrZnCo）中的钴纳米团簇，该纳米片源自金属有机框架（MOFs）。由于保留了金属钴结构，由此产生的材料具有更好的电子导电性。此外，GrZnCo 催化剂还具有很强的催化活性，可改善反应动力学并抑制副反应，从而降低充电过电位。我们通过改变钴和锌的含量，研究了不同催化剂成分（GrZnCox；x = 1、3、5）的影响。最佳催化剂 GrZnCo3 含有高钴-N 活性成分、石墨化-N、吡啶-N、吡咯-N 和丰富的缺陷结构，从而提高了电化学性能。富含缺陷的 GrZnCo3 催化剂可使锂-O2 电池在 50 mA-g-1 的条件下实现 13500 mAh-g-1 的高放电容量，并在 100 mA-g-1 的条件下实现超过 400 次的长期循环，有限容量为 500 mAh-g-1。这项工作展示了一种为各种储能系统制造具有成本效益的电催化剂的有效方法。

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引用次数: 0

Electrochemical oxidation-driven formation of nickel/nickel-based compounds on hollow carbon shells: Mechanistic insights and energy storage applications 电化学氧化驱动在空心碳壳上形成镍/镍基化合物：机理认识与储能应用。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-12 DOI: 10.1016/j.jcis.2024.11.065

Wen Zhang , Xize Chen , Wuxin Yang , Yanwei Sui , Peng Cao

Hydrangea-like nickel/nickel-based compounds decorated hollow carbon shells were synthesized through low-temperature calcination and a facile electrochemical oxidation process. This three-dimensional hollow hierarchical structure ensures intimate contact between the electrically conductive nickel (Ni) substrate and uniformly distributed electrochemically active nickel-based compounds. This hierarchical structure offers abundant active sites and accessible pathways, maximizing energy storage, particularly during rapid charge–discharge cycles. With 30 min of electrochemical oxidation, the optimized Ni-compound-based electrode exhibits a specific capacity of 643 C g⁻¹ at 1 A/g. When assembled into a nickel-zinc battery cell with a zinc foil anode, the cell demonstrates swift current responses, with full capacity recovery even after a twentyfold increase in current density, followed by a return to 1 A/g. Density functional theory computations reveal that the electrochemical oxidation, conducted for an optimized duration, results in partial oxidation of Ni(OH)₂, reducing the surface adsorption energy of OH⁻ from the electrolyte and improving charge storage capacity.

通过低温煅烧和简便的电化学氧化工艺，合成了装饰有空心碳壳的绣球状镍/镍基化合物。这种三维中空分层结构确保了导电镍（Ni）基底与均匀分布的电化学活性镍基化合物之间的亲密接触。这种分层结构提供了丰富的活性位点和通路，最大限度地提高了能量存储，尤其是在快速充放电循环过程中。经过 30 分钟的电化学氧化，优化的镍基化合物电极在 1 A/g 的条件下显示出 643 C g-1 的比容量。当把镍锌电池与锌箔阳极组装在一起时，电池显示出快速的电流响应，即使电流密度增加 20 倍，电池容量也能完全恢复，随后又恢复到 1 A/g 的水平。密度泛函理论计算显示，在优化的持续时间内进行电化学氧化会导致 Ni(OH)2 部分氧化，从而降低电解液中 OH- 的表面吸附能，提高电荷存储容量。

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引用次数: 0

A bioinspired and environmentally sustainable polyphenol-based water adhesive 一种基于生物启发和环境可持续发展的多酚水粘合剂。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-10 DOI: 10.1016/j.jcis.2024.11.042

Alba López-Moral , Jose Bolaños-Cardet , Ramon Alibés , Félix Busqué , Victor J. Yuste , Daniel Ruiz-Molina , Salvio Suárez-García

Most commercial adhesives currently available pose significant environmental concerns due to the presence of contaminants such as volatile organic compounds (VOCs). To address this challenge, much research is being focused on developing water-based adhesives. Herein, we demonstrate that polymerisation of a natural polyphenolic compound (pyrogallol) with an amino-based ligand (tris(2-aminoethyl) amine) in water allowed for the development of a novel bioinspired water-based adhesive without involving VOCs. The reaction conditions were meticulously optimised by adjusting the reaction time, ratio, drying methodology and curing temperature, to produce a functional adhesive applicable across a broad spectrum of materials. Adhesion tests demonstrated competitive and outstanding performance on aluminium, followed by wood (oak and pine) and plastics (polypropylene, polycarbonate, and polymethylmethacrylate). Notably, the adhesive outperformed one of the most commercially used adhesives on pine and oak, highlighting its competitive advantage.

由于挥发性有机化合物（VOC）等污染物的存在，目前市面上的大多数商用粘合剂都会对环境造成严重影响。为了应对这一挑战，许多研究都集中在开发水基粘合剂上。在本文中，我们展示了天然多酚化合物（焦棓酚）与氨基配体（三（2-氨基乙基）胺）在水中的聚合反应，从而开发出一种新型生物启发水基粘合剂，且不涉及挥发性有机化合物。通过调整反应时间、比例、干燥方法和固化温度，对反应条件进行了细致的优化，从而生产出一种适用于多种材料的功能性粘合剂。附着力测试表明，该粘合剂在铝材上具有出色的性能，在木材（橡木和松木）和塑料（聚丙烯、聚碳酸酯和聚甲基丙烯酸甲酯）上的性能也很出色。值得注意的是，该粘合剂在松木和橡木上的表现优于一种最常用的粘合剂，凸显了其竞争优势。

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引用次数: 0

Design and synthesis of FeS2/graphite sandwich structure with enhanced lithium-storage performance for lithium-ion and solid-state lithium batteries 为锂离子电池和固态锂电池设计并合成具有更强储锂性能的 FeS2/石墨夹层结构。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-10 DOI: 10.1016/j.jcis.2024.11.060

Qingtian Li , Tao Wang , Baiyu Guo , Xin Qiao , Xing Meng , Di Jin , Hailong Qiu

As a conversion-type cathode material, FeS₂ emerges as a promising candidate for the next generation of energy storage solutions, attributed to its cost-effectiveness, environment-friendliness and high theoretical capacity. However, several challenges hinder its practical application, including sluggish kinetics, insulating reaction products and significant volume fluctuation during cycling, which collectively compromise its rate capability and cycle stability. Herein, a well-designed sandwich structure of FeS₂ embedded between graphite layers (FeS₂/C) is obtained using a chloride intercalation and sulfidation strategy. The layered graphite-FeS₂-graphite configuration boosts the active sites and adsorption capacity of Li⁺, thereby guaranteeing a high reversible capacity. Furthermore, the graphitic carbon matrix serves a dual purpose: it enhances electronic conductivity and restrain the volume fluctuation of FeS₂ during long cycling. This combination ensures robust electrochemical kinetics, structural integrity and long life. Consequently, the FeS₂/C composites exhibit exceptional lithium storage performance, achieving capacities of 506.2 mAh g⁻¹ at 0.5 A/g and 277.2 mAh g⁻¹ at 5.0 A/g. Additionally, the FeS₂/C composites show promising potential as cathodes for all solid-state lithium batteries, showcasing high specific capacities of 658.0 mAh g⁻¹ at 0.1 A/g for the second cycle and maintaining a cycle performance of 288.5 mAh g⁻¹ after 800 cycles at 0.5 A/g. These values surpass the second discharge specific capacity of 96.1 mAh g⁻¹ and cycle capacity of 25.3 mAh g⁻¹ observed for Fe₂O₃/C composites. The discharge mechanism of FeS₂/C composites was further characterized through in-situ transmission electron microscope test. This work provides valuable insights for designing and synthesizing FeS₂, highlighting its potential for lithium ion storage and all solid-state lithium batteries.

作为一种转换型阴极材料，FeS2 因其成本效益高、环境友好和理论容量大而成为下一代储能解决方案的理想候选材料。然而，一些挑战阻碍了它的实际应用，包括缓慢的动力学、绝缘反应产物和循环过程中显著的体积波动，这些因素共同影响了它的速率能力和循环稳定性。在此，我们采用氯化物插层和硫化策略，获得了一种精心设计的嵌入石墨层之间的 FeS2 夹层结构（FeS2/C）。层状石墨-FeS2-石墨结构增强了活性位点和对 Li+ 的吸附能力，从而保证了高可逆容量。此外，石墨碳基质还具有双重作用：既能增强电子导电性，又能在长时间循环过程中抑制 FeS2 的体积波动。这种组合可确保稳定的电化学动力学、结构完整性和较长的使用寿命。因此，FeS2/C 复合材料表现出卓越的锂存储性能，在 0.5 A/g 和 5.0 A/g 的条件下，容量分别达到 506.2 mAh g-1 和 277.2 mAh g-1。此外，FeS2/C 复合材料还显示出作为所有固态锂电池阴极的巨大潜力，在 0.1 A/g 条件下的第二次循环中显示出 658.0 mAh g-1 的高比容量，并且在 0.5 A/g 条件下循环 800 次后仍能保持 288.5 mAh g-1 的循环性能。这些数值超过了在 Fe2O3/C 复合材料上观察到的 96.1 mAh g-1 的第二次放电比容量和 25.3 mAh g-1 的循环容量。通过原位透射电子显微镜测试，进一步确定了 FeS2/C 复合材料的放电机制。这项研究为设计和合成 FeS2 提供了宝贵的见解，凸显了其在锂离子存储和所有固态锂电池方面的潜力。

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引用次数: 0

High dielectric single-ion conducting interphase enables fast-charging lithium metal batteries 高介电性单离子导电中间相实现了锂金属电池的快速充电。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-10 DOI: 10.1016/j.jcis.2024.11.058

Guo Ai , Xiaojian Lian , Zhipeng Hu , Yong Lyu , Tiande Mo , Xiaochen Zhao , Xinggang Hou , Meng Sun , Hui Zhao , Ting Zhang , Wenfeng Mao

The poor stability and slow lithium ion (Li⁺) transfer kinetics of solid electrolyte interphase (SEI) pose significant challenges to lithium (Li) metal batteries. Although various SEI-related strategies have been developed, the Li⁺ transport properties and uniform Li deposition still require substantial improvement for fast-charging applications. Herein, we introduce a dielectric, single-ion-conductive artificial SEI (DS-SEI) composed of lithiated Nafion and BaTiO₃ (BTO) nanoceramics to address these issues. The lithiated Nafion stabilizes the Li anode with its elastic F-rich components and facilitates fast, single Li⁺ conduction through its anion-anchored structure. The high-dielectric BTO dynamically homogenizes the electric field (E-field) to promote uniform Li deposition, synergistically enhancing intrinsic single Li⁺ conductivity and Li⁺ desolvation/diffusion kinetics, thereby enabling fast charging of the Li anode. Consequently, the DS-SEI protected Li anode can cycle over 6800 h in a Li||Li cell at 10 mA cm⁻²/5 mAh cm⁻², over 400 cycles in a 2.75 mAh cm⁻² Li||LiFePO₄ cell at 1C, with 83.0 % capacity retention at 6C (16.5 mA cm⁻²), and maintain stable cycling in a 5.62 mAh cm⁻² Li||Li₆PS₅Cl|| LiNi_0.8Co_0.1Mn_0.1O₂ all solid-state cell. Our findings provide insights into the interfacial regulation of Li anode, paving the way for fast-charging Li metal batteries.

固态电解质相（SEI）稳定性差、锂离子（Li+）传输动力学缓慢，这给锂金属电池带来了巨大挑战。虽然已经开发出了各种与 SEI 相关的策略，但要实现快速充电应用，仍需大幅改善 Li+ 传输特性和锂的均匀沉积。为解决这些问题，我们在此介绍一种由锂化纳菲翁和 BaTiO3（BTO）纳米陶瓷组成的介电、单离子导电人工 SEI（DS-SEI）。锂化 Nafion 利用其富含 F 的弹性成分稳定锂阳极，并通过其阴离子锚定结构促进快速的单 Li+ 传导。高介电 BTO 动态均匀化电场（E-field），促进锂的均匀沉积，协同增强单锂+固有传导性和锂+解溶/扩散动力学，从而实现锂阳极的快速充电。因此，DS-SEI 保护的锂阳极可在 10 mA cm-2/5 mAh cm-2 下的锂电池中循环 6800 小时以上，在 1C 下的 2.75 mAh cm-2 Li||LiFePO4 电池中循环 400 次以上，在 6C 下（16.5 mA cm-2）容量保持率为 83.0%，并在 5.62 mAh cm-2 Li||Li6PS5Cl||LiNi0.8Co0.1Mn0.1O2 全固态电池中保持稳定循环。我们的发现为锂阳极的界面调控提供了见解，为锂金属电池的快速充电铺平了道路。

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引用次数: 0

An integrally formed Janus supramolecular bio-gel with intelligent adhesion for multifunctional healthcare 具有智能粘附性的整体成型 Janus 超分子生物凝胶，可用于多功能医疗保健。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-10 DOI: 10.1016/j.jcis.2024.11.056

Chenyang Tang , Yao Li , Xu Fei , Wenhui Zhao , Jing Tian , Longquan Xu , Yi Wang

Despite the rapid development of Janus adhesive hydrogels, most of them still entail complex fabrication processes and have the inherent flaws, such as fragility and instability, thereby restricting their biomedical applications. In this study, a novel Janus bio-gel with strong mechanical and intelligent adhesion functions is facilely fabricated through a gravity-driven settlement strategy, employing poly-cyclodextrin microspheres (PCDMs). This strategy takes advantage of the sedimentation behavior of PCDMs with various diameters to establish structural disparities on both sides of the Janus bio-gel, thereby resolving multiple predicaments including the tedious synthesis steps and poor bonding of multilayer hydrogels. Owing to the multiple dynamic interactions between polymers and PCDMs, the Janus supramolecular bio-gel demonstrates outstanding mechanical toughness (1.97 MJ/m³) and elongation rate (≈800 %). More attractively, the resulting Janus bio-gel exhibits remarkable adhesiveness (316.4 J/m² for interfacial toughness) and adhesive differences that are exceed 50 times between the two surfaces. Furthermore, the Janus supramolecular bio-gel also has excellent antibacterial properties, biocompatibility, environmental stability, and multiple monitoring functions, accelerating wound stably healing and monitoring physiologic parameters on the skin. This strategy provides a straightforward and promising approach to directly achieve multifunctional integration for smart health management.

尽管杰纳斯粘合水凝胶的发展十分迅速，但大多数水凝胶仍需要复杂的制造工艺，并存在脆性和不稳定性等固有缺陷，从而限制了其在生物医学领域的应用。本研究利用聚环糊精微球（PCDMs），通过重力驱动沉降策略，简便地制备了一种具有强大机械和智能粘附功能的新型 Janus 生物凝胶。这种策略利用不同直径的聚环糊精微球的沉降行为，在 Janus 生物凝胶的两侧建立结构差异，从而解决了包括繁琐的合成步骤和多层水凝胶粘合不良在内的多种难题。由于聚合物和 PCDM 之间的多重动态相互作用，Janus 超分子生物凝胶显示出卓越的机械韧性（1.97 MJ/m3）和伸长率（≈800%）。更吸引人的是，由此产生的 Janus 生物凝胶具有出色的粘合力（界面韧性为 316.4 J/m2），两个表面之间的粘合力差异超过 50 倍。此外，Janus 超分子生物凝胶还具有优异的抗菌性、生物相容性、环境稳定性和多种监测功能，可加速伤口稳定愈合并监测皮肤生理参数。这种策略为直接实现多功能集成的智能健康管理提供了一种直接而有前景的方法。

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引用次数: 0

Environmentally stable and multi-functional conductive gelatin/PVA/black wattle bark tannin based organogel as strain, temperature and bioelectric sensor for multi-mode sensing 环境稳定的多功能导电明胶/PVA/黑荆树皮单宁有机凝胶作为多模式传感的应变、温度和生物电传感器。

IF 9.4 1区化学 Q1 CHEMISTRY, PHYSICAL

Journal of Colloid and Interface Science

Pub Date : 2024-11-10 DOI: 10.1016/j.jcis.2024.11.045

Li Zhao , Xinru Wang , Xianyao Feng , Wenhua Yang , Zhenye Wang , Jinwei Zhang , Liyuan Zhang , Yaohui You

Conductive hydrogels are regarded as ideal candidates for the application of flexible sensors owing to their excellent flexibility, portability and conductivity. However, it is still challenging and meaningful to prepare multifunctional (self-healing, adhesion, anti-freezing, biocompatibility, antibacterial and conductivity properties) and multi-mode sensing hydrogel-based sensors. Herein, we developed an environmentally stable and multi-functional conductive organogel via dynamic crosslinks based on biomass materials gelatin, black wattle bark tannin and PVA in the propylene glycol/water binary solvent system. Thanks to the dynamic interactions in the system, the good mechanical strength and self-healing performance of the obtained organogel are simultaneously realized. Meanwhile, the organogel integrates many crucial properties such as adhesion, environmental stability (anti-freezing and water retention), biocompatibility, antibacterial behavior and conductivity capacity. Significantly, the organogel can be assembled as three-mode sensors for strain, bioelectricity and temperature sensing. This three-mode sensor can effectively monitor human health data, resulting in providing supplement human health information and conditions. This work displays an interesting approach to construct an intelligent multi-functional conductive biomass organogel based multi-mode flexible sensors.

导电水凝胶具有出色的柔韧性、便携性和导电性，因此被视为柔性传感器应用的理想候选材料。然而，制备多功能（自愈性、粘附性、抗冻性、生物相容性、抗菌性和导电性）和多模式传感的水凝胶传感器仍然具有挑战性和意义。在此，我们以生物质材料明胶、黑荆树皮单宁和 PVA 为基础，在丙二醇/水二元溶剂体系中通过动态交联开发出了一种环境稳定的多功能导电有机凝胶。由于体系中的动态相互作用，所获得的有机凝胶同时具有良好的机械强度和自愈性能。同时，该有机凝胶还集成了许多关键特性，如粘附性、环境稳定性（抗冻性和保水性）、生物相容性、抗菌性和导电性。重要的是，这种有机凝胶可以组装成应变、生物电和温度三模传感器。这种三模式传感器可有效监测人体健康数据，从而提供补充的人体健康信息和状况。这项工作展示了一种构建基于生物质有机凝胶的智能多功能导电多模柔性传感器的有趣方法。

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引用次数: 0