Nano Energy最新文献_第5页

Lithium superionic solid electrolyte: Phosphorus-free sulfide glass of LiSbGe(4-x)/4S4-xClx 锂超离子固体电解质：LiSbGe(4-x)/4S4-xClx的无磷硫化玻璃

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-19 DOI: 10.1016/j.nanoen.2025.111603

Yuna Kim , Woojung Lee , Jiyun Han , Yeong Mu Seo , Dokyung Kim , Young Joo Lee , Byung Gon Kim , Munseok S. Chae , Sung Jin Kim , In Young Kim

This study demonstrates a novel glass compound of LiSbGe_(4-x)/4S_4-xCl_x (x = 0 −0.7) and validate its efficacy as a solid electrolyte for all-solid-state-batteries. Phosphorous-free sulfide solid electrolytes of LiSbGe_(4-x)/4S_4-xCl_x (x = 0 −0.7) are first designed and synthesized based on the hard and soft acid-base (HSAB) theory by alternating lithium thio-phosphate compounds. The LiSbGeS₄ has exceptional amorphous nature in a broad temperature range over 600 ℃. As the LiSbGeS₄ does not contain phosphorus, it has improved chemical stability and wide operating potential window in the range of 0.30−2.00 V vs. In/InLi. Among the series of LiSbGe_(4-x)/4S_4-xCl_x (x = 0 −0.7), the mostly optimized LiSbGe_0.875S_3.5Cl_0.5 (x = 0.5) exhibits a superionic conductivity of 1.82 × 10⁻³ S·cm⁻¹, a small activation energy of 0.18 eV, and a broad operating potential window of 0.60−2.00 V vs. In/InLi. The LiSbGe_0.875S_3.5Cl_0.5 (x = 0.5) is remarkably stable at high current densities above 48.5 mA·cm⁻² and shows reversible cyclability with no short circuit above 710 h (328 cycles). The exceptionally increased solid electrolyte performance of LiSbGe_0.875S_3.5Cl_0.5 (x = 0.5) is rationalized by the weakened bond strength with Li⁺ and enhanced amorphous nature of the anionic skeleton of LiSbGe_0.875S_3.5Cl_0.5 (x = 0.5) through LiCl-doping and press-induced sintering, respectively. The results of this study contribute towards the development of phosphorus-free solid electrolytes with promising electrochemical attributes and also towards understanding the Li-ion conduction mechanism in aliovalent-substituted glass electrolytes.

本研究展示了一种新型的LiSbGe(4-x)/4S4-xClx （x=0−0.7）玻璃化合物，并验证了其作为全固态电池固体电解质的有效性。基于硬、软酸碱（HSAB）理论，采用硫代磷酸锂交替制备了LiSbGe(4-x)/4S4-xClx （x=0 ~ 0.7）无磷硫化物固体电解质。在600℃以上的较宽温度范围内，LiSbGeS4具有优异的非晶态性质。由于LiSbGeS4不含磷，因此具有更好的化学稳定性和宽的工作电位窗口，在0.30−2.00 V vs. in /InLi范围内。在LiSbGe(4-x)/4S4-xClx （x=0 ~ 0.7）系列中，优化最多的LiSbGe0.875S3.5Cl0.5 （x=0.5）的超离子电导率为1.82×10−3 S·cm−1，活化能较小，为0.18 eV，相对于In/InLi的工作电位窗口为0.60 ~ 2.00 V。LiSbGe0.875S3.5Cl0.5 （x=0.5）在48.5 mA∙cm−2以上的高电流密度下具有显著的稳定性，并且在710 h（328次循环）以上表现出可逆的可循环性，无短路。LiSbGe0.875S3.5Cl0.5 （x=0.5）固体电解质性能的异常提高是由于掺杂licl和压致烧结使LiSbGe0.875S3.5Cl0.5 （x=0.5）的阴离子骨架与Li+的结合强度减弱和非晶性增强所致。该研究结果有助于开发具有良好电化学特性的无磷固体电解质，并有助于理解价取代玻璃电解质中锂离子的传导机制。

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引用次数: 0

Stabilizing nickel sulfide by suppressing phase transition for durable hydrogen evolution 抑制相变稳定硫化镍，促进持久析氢

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-19 DOI: 10.1016/j.nanoen.2025.111601

Xu Luo , Hongyu Zhao , Lin Wang , Xin Tan , Liuyi Guo , Linbo Jiang , Mengxiao Wang , Zhenhua Tao , Shichun Mu

The electrochemical stability of transition metal sulfides is severely compromised during the hydrogen evolution reaction (HER) due to phase transitions induced by excessive sulfur dissolution and electron accumulation, which also obscures the underlying HER mechanism. Herein, guided by theoretical analysis, by introducing NiMoO₄ electron acceptor, we design a NiMoO₄@NiS₂ dendritic-like nanorod with internal electron transport channels, which strengthens d-p orbital hybridization of Ni-S bonds, stabilizes Ni-S coordination, and increases the S vacancy formation energy. Inspiringly, during alkaline HER, the sulfur loss in NiMoO₄@NiS₂ is reduced to 12.9 %, significantly lower than that of pure NiS₂ (24.5 %). In situ spectroscopic evidence confirms NiMoO₄@NiS₂ suppressed phase transition to low-coordinated NiS/Ni₃S₂ and alleviated electron enrichment dilemma, thereby achieving stable operation for up to 1000 h. As a bifunctional catalyst for anion-exchange membrane water electrolyzer (AEMWE), the decay rate of NiMoO₄@NiS₂ is only 0.538 mV/h at 500 mA cm⁻², which is 7.7 times lower than that of NiS₂ (4.168 mV/h). During the HER, the unsaturated S-coordinated Ni(OH)₂/MoO₄@NiS_2-x derived by partial dissolution of MoO₄^2- and S serves as dual active centers for water dissociation and hydrogen adsorption, respectively, synergistically optimizing the HER energy barrier. This work emphasizes structural reconstruction regulation to achieve high-performance catalysts.

在析氢反应过程中，过渡金属硫化物的电化学稳定性受到硫的过度溶解和电子积累引起的相变的严重影响，这也使析氢反应的潜在机制变得模糊。本文在理论分析的指导下，通过引入NiMoO4电子受体，设计了具有内部电子传递通道的NiMoO4@NiS2枝状纳米棒，增强了Ni-S键的d-p轨道杂化，稳定了Ni-S配位，提高了S空位形成能。令人鼓舞的是，在碱性HER中，NiMoO₄@NiS₂的硫损失降至12.9%，显著低于纯NiS₂的24.5%。原位光谱证据证实，NiMoO₄@NiS₂抑制了向低配位NiS/Ni3S2的相变，缓解了电子富集困境，从而实现了长达1000 h的稳定运行。作为阴离子交换膜水电解槽（AEMWE）的双功能催化剂，NiMoO4@NiS2在500 mA cm-2下的衰减速率仅为0.538 mV/h，比NiS2 （4.168 mV/h）低7.7倍。在HER过程中，由MoO42-和S部分溶解得到的不饱和S配位Ni(OH)2/MoO4@NiS2-x分别作为水解离和氢吸附的双活性中心，协同优化HER能垒。本工作强调结构重构调控以获得高性能催化剂。

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引用次数: 0

Boosted hydrogen production via selective electrooxidation of H2S to thiosulfate 通过选择性电氧化H2S生成硫代硫酸盐提高了氢气产量

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-17 DOI: 10.1016/j.nanoen.2025.111599

Kalpana Garg , Sukhjot Kaur , Abhishek Kumar , Vivekanand Shukla , Rajeev Ahuja , Tharamani C. Nagaiah

A potential approach for reducing energy consumption of the water splitting for hydrogen (H₂) production entails substituting the energy-intensive oxygen evolution reaction (OER) with a simpler sulfide oxidation reaction (SOR), which produces value-added sulfur-based compounds from waste hydrogen sulfide (H₂S). However, long-perplexing passivation issue of solid sulfur renders the inferior catalytic SOR performance and oxidation product, polysulfides, requires further acid treatment to extract cheap elemental sulfur. Therefore, we carried out the H₂S oxidation in sulfite media to directly convert the sulfions to thiosulfate. Herein, we explored Cu₂O@NF synthesized using a galvanic displacement reaction and fine-tuned its morphology at different temperatures, wherein Cu₂O@NF-50 exhibited a significantly reduced anode potential for thiosulfate formation reaction (TFR) of 0.20 V vs. RHE at 10 mA cm⁻² compared to the OER (1.43 V vs. RHE). Especially, with a skilled arsenal of in-situ electrochemical techniques such as Fourier transform infrared spectroscopy, UV–vis spectroscopy and Raman spectroscopy, it is revealed that S_n^2-/S has been selectively converted to product S₂O₃^2-. Moreover, the prepared catalyst was employed for overall H₂S splitting as a bifunctional electrocatalyst for producing thiosulfate (Na₂S₂O₃) with high yield of 91 % and H₂ with high faradaic efficiency (F.E.) of ∼84.2 %.

降低水裂解制氢能耗的潜在方法是用更简单的硫化物氧化反应（SOR）取代高能耗的析氧反应（OER），该反应可从废硫化氢（H2S）中产生增值的硫基化合物。然而，长期困扰固体硫的钝化问题使得催化SOR性能较差，氧化产物多硫化物需要进一步的酸处理来提取廉价的单质硫。因此，我们在亚硫酸盐介质中进行H2S氧化，直接将硫代硫酸盐转化为硫代硫酸盐。在此，我们探索了用电位移反应合成的Cu2O@NF，并在不同温度下对其形貌进行了微调，其中Cu2O@NF-50在10 mA cm - 2时的硫代硫酸盐形成反应（TFR）的阳极电位（0.20 V vs. RHE）明显低于OER （1.43 V vs. RHE）。特别是，利用傅立叶变换红外光谱、紫外-可见光谱和拉曼光谱等原位电化学技术，发现Sn2-/S被选择性地转化为产物S2O32-。此外，所制备的催化剂用于H2S整体裂解，作为双功能电催化剂，产率高达91%的硫代硫酸盐（Na2S2O3）和法拉第效率（F.E.）高达84.2%的H2。

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引用次数: 0

Large-area InSe nanofilm for artificial optoelectronic synapses with ultra-low energy consumption 用于超低能耗人工光电突触的大面积InSe纳米膜

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-17 DOI: 10.1016/j.nanoen.2025.111600

Xuxuan Yang , Dongbo Wang , Zhiyao Zheng , Chenchen Zhao , Donghao Liu , Sihang Liu , Dong Li , Hao Dang , Xin Li , Pingan Hu , Wei Feng , Zheng Li , Ruiyuan Liu

Optoelectronic synaptic devices based on two-dimensional (2D) materials hold great promise for the development of energy-efficient artificial neural visual systems (ANVSs), owing to their strong light–matter interactions and atomic thickness. 2D indium selenide (InSe) with the outstanding gate control capability and high sensitivity has tremendous application potential in photonic neuromorphic computing. Here, a simplified two-terminal (2 T) photonic synapse device with ultralow energy consumption based on solution-processed 2D InSe is proposed for the first time. An electrochemical intercalation method is employed to prepare 2D InSe nanosheets while simultaneously introducing Se vacancies, which act as defect centers to efficiently trap photogenerated carriers. Large-scale (2 ×2 cm²) InSe nanofilms are fabricated via facile spin-coating, and the resulting 5 × 6 2 T optoelectronic synaptic device array successfully simulates advanced synaptic functions, including excitatory postsynaptic currents, paired-pulse facilitation, and the transition from short-term memory to long-term memory. More importantly, the device achieves ultra-low energy consumption of ∼0.51 fJ per event, which is one order of magnitude lower than that of biological synapses and surpasses most photoelectric synaptic devices based on 2D materials. Spectrum-dependent synaptic responses further enhance the tunability of synaptic behavior, which can be utilized to simulate human learning and memory processes under various emotional states. This work presents a facile method for fabricating high-performance optoelectronic synapses, thereby expanding the potential of solution-processed 2D materials for applications in advanced optoelectronic devices.

基于二维（2D）材料的光电突触器件由于其强烈的光-物质相互作用和原子厚度，对节能人工神经视觉系统（ANVSs）的发展具有很大的希望。二维硒化铟（InSe）具有优异的栅极控制能力和高灵敏度，在光子神经形态计算中具有巨大的应用潜力。本文首次提出了一种基于溶液处理二维InSe的简化双端（2t）超低能耗光子突触器件。采用电化学插层方法制备了二维铟硒纳米片，同时引入了硒空位作为缺陷中心，有效地捕获了光生载流子。大规模（2×2 cm2）的InSe纳米膜通过简单的自旋涂层制备，得到的5×6 2t光电突触器件阵列成功地模拟了高级突触功能，包括兴奋性突触后电流、成对脉冲促进以及从短期记忆到长期记忆的转变。更重要的是，该器件实现了每事件~0.51 fJ的超低能耗，比生物突触低一个数量级，超过了大多数基于二维材料的光电突触器件。谱依赖性突触反应进一步增强了突触行为的可调性，可用于模拟人类在各种情绪状态下的学习和记忆过程。这项工作提出了一种制造高性能光电突触的简便方法，从而扩大了溶液处理二维材料在先进光电器件中的应用潜力。

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引用次数: 0

Multi-material co-extrusion for precise 3D printing of miniaturized wearable TENG sensors 微型可穿戴TENG传感器的多材料共挤精密3D打印

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-17 DOI: 10.1016/j.nanoen.2025.111593

Myounggyu Kwak , Minkyoung Lee , Hyungseok Lee

Triboelectric nanogenerator (TENG)-based sensors, which convert mechanical stimuli into electrical signals, have attracted significant attention for wearable device applications. This interest has driven the development of diverse structural designs and fabrication methods. However, challenges persist due to complex manufacturing processes and limitations in miniaturization. To address these issues, this study introduces a cartridge-based co-extrusion 3D printing technology. This method utilizes a compartmentalized cartridge that integrates multiple materials and extrudes them simultaneously through a syringe, enabling one-step fabrication without the need for post-assembly. The internal architecture of the cartridge and the specifications of the attached micro-nozzle allow for precise internal patterning and the miniaturization of printed structures. To ensure reliable extrusion and structural integrity, the inks were formulated with tailored viscoelastic properties, including sufficient shear-thinning behavior for smooth deposition and shape retention. Based on this stable process, the electrical performance of TENG sensors was evaluated by varying inner layer ratios, fiber diameters, and printing configurations. The sensors consistently generated distinguishable signals under different motion types and contact conditions, demonstrating high sensitivity and functional reliability. Moreover, the printed devices also showed potential as actuators, broadening their applications in wearable electronics, healthcare, robotics, and human–machine interfaces.

基于摩擦电纳米发电机（TENG）的传感器将机械刺激转化为电信号，在可穿戴设备的应用中引起了人们的极大关注。这种兴趣推动了各种结构设计和制造方法的发展。然而，由于复杂的制造工艺和小型化的限制，挑战仍然存在。为了解决这些问题，本研究引入了一种基于墨盒的共挤出3D打印技术。这种方法利用了一个分隔盒，集成了多种材料，并通过注射器同时挤出它们，实现了一步制造，而不需要后期组装。墨盒的内部结构和附带的微喷嘴的规格允许精确的内部图案和印刷结构的小型化。为了确保可靠的挤压和结构完整性，油墨的配方具有量身定制的粘弹性性能，包括足够的剪切减薄行为，以实现平滑沉积和形状保持。在此稳定过程的基础上，通过改变内层比、纤维直径和打印配置来评估TENG传感器的电性能。在不同的运动类型和接触条件下，传感器始终产生可识别的信号，具有较高的灵敏度和功能可靠性。此外，印刷设备还显示出作为执行器的潜力，扩大了它们在可穿戴电子产品、医疗保健、机器人和人机界面方面的应用。

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引用次数: 0

Surface energy engineering enables highly efficient antimony selenosulfide solar cells 表面能工程实现高效硒化锑太阳能电池

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-15 DOI: 10.1016/j.nanoen.2025.111592

Donglou Ren , Chen Li , Yi Wang , Hao Huang , Hui Peng , Cong Liu , Shuo Chen , Hongli Ma , Xianghua Zhang , Daocheng Pan , Bingsuo Zou , Liming Ding , Guangxing Liang

Antimony selenosulfide (Sb₂(S,Se)₃) is a competitive light-harvesting material, especially for solar cells. However, the interfacial nonradiative recombination and anisotropic carrier transport in the absorber impede the efficiency improvement. Herein, we propose a strategy for passivating interface defects and facilitating carrier transport by an effective surface energy engineering. In this regard, the surface energy of cadmium sulfide (CdS) electron transport layer (ETL) is selectively modulated via a dual-functional amorphous cadmium telluride oxide (CdTeO₃) layer, causing more exposure of polar (002) facets with improved conductivity. Additionally, the amorphous CdTeO₃ layer not only induces the desirable [211]-oriented Sb₂(S,Se)₃ with high-efficient carrier transport but also causes a benign band alignment with suppressed interface nonradiative recombination. As a result, the device delivers an efficiency of 10.31 %. This study suggests that modulating surface energy of CdS ETL with interfacial defect passivation and carrier transport amendment shines a new light on breaking the bottleneck in the development of Sb₂(S,Se)₃ solar cells.

硒化硫化锑（Sb2(S,Se)3）是一种极具竞争力的光收集材料，尤其适用于太阳能电池。然而，吸收器界面非辐射复合和各向异性载流子输运阻碍了效率的提高。在此，我们提出了一种通过有效的表面能工程来钝化界面缺陷和促进载流子传输的策略。在这方面，通过双功能无定形碲化镉氧化物（CdTeO3）层选择性地调制硫化镉（CdS）电子传输层（ETL）的表面能，导致更多的极性（002）面暴露，并提高电导率。此外，非晶态CdTeO3层不仅诱导出理想的具有高效载流子输运的[211]定向Sb2(S,Se)3，而且还抑制了界面非辐射复合，形成了良好的能带对准。因此，该设备提供了10.31%的效率。本研究表明，通过界面缺陷钝化和载流子输运修正来调制CdS ETL的表面能，为突破Sb2(S,Se)3太阳能电池的发展瓶颈提供了新的思路。

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引用次数: 0

The synergistic regulation of interface and bulk for high-entropy PVDF-based electrolytes endows ultra-long cycling of solid-state lithium metal batteries 高熵pvdf基电解质界面和体积的协同调节赋予固态锂金属电池超长循环

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-15 DOI: 10.1016/j.nanoen.2025.111594

Kaibo Fan , Jie Chen , Biao Wang , Kao Cao , Chenyang Zhang , Jun Chen , Yong Zhao , Jiren Yuan , Zhengguang Hu , Li Wang

The distinctive ion transport mechanism of Poly(vinylidene fluoride) (PVDF)-based electrolytes endows solid-state lithium metal batteries (SSLMBs) with the possibility of operating at room temperature. However, the severe interface side reactions caused by residual N, N-dimethylformamide (DMF) and the sluggish ion migration dynamic arising from the anchor effect of PVDF chains on free Li⁺ have impaired the high-rate cycling capacities and lifespans of SSLMBs. To conquer the challenge, we propose the novel strategy for fabricating the high-entropy PVDF-based electrolytes by introducing the Tetraethylene glycol dimethyl ether (TEGDME) as co-solvent and LiNO₃ as co-salt. Results confirm that the diverse solvation ligands enhance the chaos degree of PVLT, which is conductive to disrupt the initial Li⁺ solvation state dominated by DMF/PVDF. The strong nucleophilicity of TEGDME and NO₃⁻ significantly diminishes the ion-dipole interactions of Li⁺···PVDF/Li⁺···DMF, thereby peeling 46 % of PVDF and 45.96 % of DMF from the inner solvation sheath, the weaker interaction environment and simplified ligand quantity accelerate the ion desolvation dynamics. Furthermore, the Li⁺ solvation state governed by NO₃⁻ and TEGDME exhibits high HOMO/LUMO energy levels to construct the inorganic-rich bilayer interphase. The synergistic regulation of bulk and interface endows PVLT with commendably improved ionic conductivity of 0.65 mS cm⁻¹ and critical current density of 1.8 mA cm⁻². As a result, the fabricated LFP|PVLT|Li battery presents superior cycling performance of 1200, 1000, 800 and 520 times at 0.5, 1, 2, 10 C, respectively, which also reach 800 cycles with no capacity fade under −10 °C.

聚偏氟乙烯（PVDF）电解质独特的离子传输机制使固态锂金属电池（sslmb）有可能在室温下工作。然而，残留的N， N-二甲基甲酰胺（DMF）引起的严重的界面副反应以及PVDF链对游离Li+的锚定效应引起的缓慢的离子迁移动力学影响了sslmb的高速率循环能力和寿命。为了克服这一挑战，我们提出了一种新的策略，通过引入四乙二醇二甲醚（TEGDME）作为共溶剂，LiNO3作为共盐来制备高熵pvdf基电解质。结果证实，不同的溶剂化配体增强了PVLT的混沌程度，这有助于破坏DMF/PVDF主导的Li+初始溶剂化状态。TEGDME和NO3−的强亲核性显著减弱了Li+··PVDF/Li+··DMF的离子偶极相互作用，从而使46%的PVDF和45.96%的DMF从溶剂化鞘层剥离，较弱的相互作用环境和简化的配体数量加速了离子的脱溶动力学。此外，由NO3−和TEGDME控制的Li+溶剂化态表现出较高的HOMO/LUMO能级，从而构建了富无机的双层间相。体积和界面的协同调节使PVLT的离子电导率提高到0.65 mS cm−1，临界电流密度达到1.8 mA cm−2。结果表明，制备的LFP|PVLT|锂电池在0.5℃、1℃、2℃、10℃下循环次数分别为1200次、1000次、800次和520次，在−10℃下循环次数达到800次且容量无衰减。

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引用次数: 0

Elastic aerogels prepared by cyclic freeze casting for broadband sound absorption and sleep health monitoring 循环冷冻铸造弹性气凝胶用于宽带吸声和睡眠健康监测

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-14 DOI: 10.1016/j.nanoen.2025.111591

Shuyi Shen , Zishi Jiang , Yanjun Lu, Kaiyu Feng, Yawen Wu, Kechao Zhou, Dou Zhang, Yan Zhang

The excessive environmental noise negatively affects sleep health, driving demand for high-performance sound absorption materials. However, conventional porous materials face limitations: high density compromising user comfort, narrow absorption bands reducing efficiency, and single functionality failing to meet various requirements. In this study, a lightweight multifunctional aerogel (cCBAs), composed of bacterial cellulose (BC) and barium calcium zirconate titanate (BCZT), was fabricated by a cyclic freeze casting method. The aerogel achieved a thickness-normalized noise reduction coefficient (NRC) of 0.24 at a low areal density of 4.7 mg cm⁻², and showed compressive elasticity even in liquid nitrogen. Additionally, the aerogels exhibited a piezoelectric sensitivity of 0.130 V kPa⁻¹ and the aerogels enabled precise sleep behavior monitoring through deep-learning algorithms, achieving 100 % recognition accuracy. This study offers a promising strategy for developing intelligent sound-absorbing materials with broad applications.

过度的环境噪声对睡眠健康产生负面影响，推动了对高性能吸声材料的需求。然而，传统的多孔材料面临着高密度影响用户舒适度，窄吸收带降低效率，单一功能不能满足各种要求的局限性。以细菌纤维素（BC）和锆钛酸钡钙（BCZT）为原料，采用循环冷冻铸造法制备了轻质多功能气凝胶（cCBAs）。在4.7 mg cm-2的低面密度下，气凝胶的厚度归一化降噪系数（NRC）为0.24，在液氮环境下也表现出压缩弹性。此外，气凝胶的压电灵敏度为0.130 V kPa-1，通过深度学习算法实现精确的睡眠行为监测，识别准确率达到100%。本研究为开发具有广泛应用前景的智能吸声材料提供了一条有前景的策略。

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引用次数: 0

Synergistic defect passivation and phase stabilization enable highly efficient wide-bandgap perovskite solar cells and tandems 协同缺陷钝化和相位稳定实现高效宽禁带钙钛矿太阳能电池和串联

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-13 DOI: 10.1016/j.nanoen.2025.111590

Ying Peng , Xuzhi Hu , Mengqi Ren , Feng Ye , Guang Li , Shaopeng Liao , Weitao Zhao , Wenna Huang , Shengjie Du , Zuojun Tan , Jianjun Chen , Guojia Fang , Hongwei Lei

Wide-bandgap (WBG) metal halide perovskites are considered promising candidates for the top cells in tandem photovoltaics due to their tunable bandgap and outstanding optoelectronic characteristics. However, the photovoltaic performance of these WBG perovskite solar cells (PSCs) remains constrained by substantial open-circuit voltage (V_OC) losses arising from surface and bulk defects, in addition to photoinduced phase segregation. In this study, we introduce 4-guanidinobenzyl aminoguanidine hydrochloride (GBACl) as a multifunctional modifier for WBG perovskites. GBACl treatment induces an efficient top-to-bottom passivation across the top surface, bulk grain, and buried interface of the perovskites, simultaneously reducing the defect densities and suppressing the phase segregation. This approach dramatically improves both the V_OC and fill factor of 1.67 eV WBG PSCs, achieving an efficiency improvement from 18.72 % to 21.10 % while improving the device stability. Furthermore, by integrating the optimized semitransparent WBG front cell with a silicon or tin-lead bottom cell, we demonstrate monolithic perovskite/silicon and four-terminal all-perovskite tandem solar cells with champion efficiencies of 29.67 % and 28.37 %, respectively. Our work provides an effective top-to-bottom passivation strategy for developing highly efficient and stable WBG perovskites and tandem photovoltaics.

宽带隙（WBG）金属卤化物钙钛矿由于其可调的带隙和出色的光电特性而被认为是串联光伏顶层电池的有希望的候选者。然而，这些WBG钙钛矿太阳能电池（PSCs）的光伏性能仍然受到表面和体缺陷引起的大量开路电压（VOC）损失和光致相偏析的限制。在这项研究中，我们引入了4-胍基苯基氨基胍盐酸盐（GBACl）作为WBG钙钛矿的多功能改性剂。GBACl处理在钙钛矿的顶表面、大块晶粒和埋藏界面诱导了从上到下的有效钝化，同时降低了缺陷密度并抑制了相偏析。该方法显著提高了1.67 eV WBG PSCs的VOC和填充因子，在提高器件稳定性的同时，将效率从18.72%提高到21.10%。此外，通过将优化的半透明WBG前端电池与硅或锡铅底部电池集成，我们展示了单片钙钛矿/硅和四端全钙钛矿串联太阳能电池，冠军效率分别为29.67%和28.37%。我们的工作为开发高效稳定的WBG钙钛矿和串联光伏提供了一种有效的自上而下的钝化策略。

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引用次数: 0

Continuously wavelength-tunable single-mode perovskite vertical-cavity surface-emitting laser with embedded intracavity nematic liquid crystal 嵌入腔内向列液晶的连续波长可调单模钙钛矿垂直腔面发射激光器

IF 17.1 1区材料科学 Q1 CHEMISTRY, PHYSICAL

Nano Energy

Pub Date : 2025-11-12 DOI: 10.1016/j.nanoen.2025.111589

Baolu Guan , Liangliang Zhu , Shuai Huang , Qin Zhang , Sunan Li , Xinping Zhang

Continuously wavelength-tunable perovskite lasers have emerged as compelling candidates for integrated optoelectronic devices, particularly in optical research and communication applications. Nevertheless, current configuration designs of perovskite tunable lasers typically rely on multiple spatially separated perovskite materials within a single laser architecture, which significantly impedes the integration of optoelectronic devices. In this work, we present an innovative design featuring an intracavity liquid crystal (LC)-integrated continuously wavelength-tunable single-mode perovskite vertical-cavity surface-emitting laser (VCSEL). This flexible wavelength tunability function of the developed perovskite laser is realized through the voltage-driven variations in the refractive index of the liquid crystal layer and effective cavity length, thereby enabling dynamic manipulation of emission spectral. Consequently, a continuous spectral tuning range from 811 nm to 783 nm was achieved with the increasing applied voltage, accompanied by a decent threshold of 2.35 μJ cm⁻² and a superior operational stability. Synchronously, a thermally induced wavelength shift from 811 nm to 792 nm was also observed as the temperature rose from 25 °C to 40 °C, underscoring an exceptional thermal tuning capability. The integration of liquid crystals with perovskite laser holds substantial promise for the advancement of optoelectronic devices, providing novel insights for the future progression of perovskite laser technology.

连续波长可调的钙钛矿激光器已成为集成光电器件的引人注目的候选者，特别是在光学研究和通信应用中。然而，目前钙钛矿可调谐激光器的配置设计通常依赖于单个激光器结构中多个空间分离的钙钛矿材料，这严重阻碍了光电器件的集成。在这项工作中，我们提出了一种具有腔内液晶（LC）集成的连续波长可调单模钙钛矿垂直腔表面发射激光器（VCSEL）的创新设计。所研制的钙钛矿激光器的这种灵活的波长可调谐功能是通过电压驱动液晶层折射率和有效腔长的变化来实现的，从而实现对发射光谱的动态操纵。结果表明，在811 ~ 783 nm范围内，随着外加电压的增加，可以实现连续的光谱调谐，阈值为2.35 μJ cm-2，具有良好的工作稳定性。同时，当温度从25°C升高到40°C时，还观察到热诱导波长从811 nm到792 nm的变化，强调了特殊的热调谐能力。液晶与钙钛矿激光的集成为光电器件的发展提供了巨大的希望，为钙钛矿激光技术的未来发展提供了新的见解。

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