S-1805/Ag/Au Hybrid Transparent Electrodes for ITO-free Flexible Organic Photovoltaics

We fabricated an S-1805/Ag/Au hybrid transparent electrode based on 4.4 lini ultrathin Au film, which exhibited a high transparency(T=78% at 550 nm), a low sheet resistance(Rs=70Ωl/sq), and an extremely smooth surface(roughness=0.37 nm). The three-dimensional(3D) island growth mode of 4.4 nm Au film was resisted by tlie chemical bonding effect of the nonconductive S-1805 film and the wetting behavior of 0.6 nm Ag layer. The S-1805/Ag/Au hybrid transparent electrodes were used as the replacement of ITO anodes in flexible organic photovoltaics(OPVs), and the S-1805/Ag/Au-based OP Vs resulted in the similar power conversion efficiency compared to ITO-based devices. High flexibility and mechanical robustness were demonstrated in the ITO-free OPVs without obvious degeneration in device performance after over 2000 repeated bending cycles.     

An Illumination‐Assisted Flexible Self‐Powered Energy System Based on a Li–O2 Battery

The flexible Li‐O₂ battery is suitable to satisfy the requirements of a self‐powered energy system, thanks to environmental friendliness, low cost, and high theoretical energy density. Herein, a flexible porous bifunctional electrode with both electrocatalytic and photocatalytic activity was synthesized and introduced as a cathode to assemble a high‐performance Li‐O₂ battery that achieved an overpotential of 0.19 V by charging with the aid of solar energy. As a proof‐of‐concept application, a flexible Li‐O₂ battery was constructed and integrated with a solar cell via a scalable encapsulate method to fabricate a flexible self‐powered energy system with excellent flexibility and mechanical stability. Moreover, by exploring the evolution of the electrode morphology and discharge products (Li₂O₂), the charging process of the Li‐O₂ battery powered by solar energy and solar cell was demonstrated.     

Self‐Healable Solid Polymeric Electrolytes for Stable and Flexible Lithium Metal Batteries

The key issue holding back the application of solid polymeric electrolytes in high‐energy density lithium metal batteries is the contradictory requirements of high ion conductivity and mechanical stability. In this work, self‐healable solid polymeric electrolytes (SHSPEs) with rigid‐flexible backbones and high ion conductivity are synthesized by a facile condensation polymerization approach. The all‐solid Li metal full batteries based on the SHSPEs possess freely bending flexibility and stable cycling performance as a result of the more disciplined metal Li plating/stripping, which have great implications as long‐lifespan energy sources compatible with other wearable devices.     

柔性热电器件的制备与性能研究

介绍了有机/无机复合热电材料的柔性器件, 按照柔性器件的组装制备方式, 以串联型、 堆砌型和折叠型3种类型, 详细地总结了其制备过程与器件热电性能, 探讨该领域的研究进展, 并对其发展前景进行展望.     

Coupled Ag nanocrystal-based transparent mesh electrodes for transparent and flexible electro-magnetic interference shielding films

In this study, we developed a fabrication method of conductive and transparent Ag mesh electrodes on flexible polymer film at temperatures lower than 100?°C. Random patterned Ag mesh film was fabricated on a flexible PET substrate over 15?×?15?cm² by a self-assembly process. It became conductive by a coupling process at low temperatures. The coupled Ag mesh film showed more than 88% transmittance in visible wavelength and less than 8.2?Ω?sq^?1 in sheet resistance with figure of merit (FoM) value of 350. This transparent flexible EMI shield film fabricated with a coupled Ag mesh pattern showed high EM shielding effectiveness of ?23?dB?at 1.5–10?GHz frequency with a high transparency of 88%.     

纳米碳材料在可穿戴柔性导电材料中的应用研究进展

可穿戴设备的兴起使得对柔性器件的需求日益提高,柔性导电材料作为可穿戴器件的重要组成部分而成为研究的热点。传统的电极材料主要是金属,因金属材料本身不具有柔性,一般通过降低金属层厚度以及设计波纹结构等策略实现其在柔性器件中的应用,其加工程序复杂,成本较高。以碳纳米管和石墨烯为代表的纳米碳材料兼具良好的柔性和优异的导电性,且具有化学稳定、热稳定、光学透明性等优点,在柔性导电材料领域展现了极大的应用潜力。本文简要综述了近年来纳米碳材料在柔性导电材料领域的研究进展,首先介绍了碳纳米管基柔性导电材料,分别包括基于碳纳米管水平阵列、碳纳米管垂直阵列、碳纳米管薄膜、碳纳米管纤维的柔性导电材料;继而介绍了石墨烯基柔性导电材料,包括基于剥离法制备的石墨烯和化学气相沉积法制备的石墨烯以及石墨烯纤维基柔性导电材料;并简述了碳纳米管/石墨烯复合柔性导电材料;最后论述了纳米碳材料基柔性导电材料所面临的挑战并展望了其未来发展方向。     

键合型邻乙酰水杨酸纤维素酯手性固定相的合成及应用

将邻乙酰水杨酸纤维素酯通过间隔臂--2-（3,4-环氧环己基）乙基三甲氧基硅烷键合于硅胶之上,制得键合型手性固定相CSP1,考察了其与同类纤维素衍生物制得的涂敷型手性固定相在拆分效果方面的异同,并探讨了其差异的原因与机理。为了印证间隔臂中环己基对于手性拆分的作用,本文又将CSP1与间隔臂中不具有环己基的键合型手性固定相CSP2进行了拆分对比,进一步证实了间隔臂中环己基的作用。结果表明,键合型手性固定相相比涂敷型固定相在拆分咪唑类药物方面具有优势,这种优势一方面来自于流动相范围的扩大,另一方面是由于间隔臂中环己基对纤维素表面结构的修饰作用。     

Analytical study of nonlinear synchronous full annular rub motion of flexible rotor–stator system and its dynamic stability

The nonlinear synchronous full annular rub motion of a flexible rotor induced by the mass unbalance and the contact-rub force with rigid and flexible stator is studied analytically. The nonlinear property is due to the dry friction force between stator and rotor. The exact solutions of the synchronous full annular rub motion and its run speed regions are obtained. The stability of the synchronous full annular rub motion is discussed analytically. The stability criterion and the stability regions of the synchronous full annular rub motion are obtained. A simplified approximate criterion formula for dynamic stability is also derived under the conditions of large impact stiffness, small damping and small friction. The simplified criterion formula can be used conveniently in engineering and matches the real situations of industry.     

Design methods of rhombic tensegrity structures

As a special type of novel flexible structures, tensegrity holds promise for many potential applications in such fields as materials science, biomechanics, civil and aerospace engineering. Rhombic systems are an important class of tensegrity structures, in which each bar constitutes the longest diagonal of a rhombus of four strings. In this paper, we address the design methods of rhombic structures based on the idea that many tensegrity structures can be constructed by assembling one-bar elementary cells. By analyzing the properties of rhombic cells, we first develop two novel schemes, namely, direct enumeration scheme and cell-substitution scheme. In addition, a facile and efficient method is presented to integrate several rhombic systems into a larger tensegrity structure. To illustrate the applications of these methods, some novel rhombic tensegrity structures are constructed.     

ITER磁体重力支撑系统的应力强度分析

用ANSYS有限元软件,分析了ITER重力支撑系统的静力情况。采用实体单元建立有限元模型,分析了磁体重量、热载荷、地震和电磁力多种工况下的应力分布及位移变形,获得的最大应力强度和最大位移均在许用应力及允许位移范围内。为进一步优化ITER重力支撑系统提供了重要的参考数据。