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Tellurium Filled Carbon Nanotubes Cathodes for Li-Te Batteries with High Capacity and Long-Term Cyclability

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SSRN 2023年

作者： Rao, Shaoqing Wu, Ruizhe Zhu, Zhu Wu, Jinsong Ding, Yao Mai, Liqiang School of Materials Science and Engineering Wuhan University of Technology Wuhan430070 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Collaborative Innovation Center for Advanced Organic Chemical Materials Co-constructed by the Province and Ministry Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules College of Chemistry and Chemical Engineering Hubei University Wuhan430062 China

Li-Te batteries, compared with traditional lithium-ion batteries and Li-other group VIA elements (including O, S, Se) batteries, have shown overwhelming features of high specific volumetric capacity and superior electrical conductivity. These features make the Li-Te batteries possess great importance in modern portable electronics and electric vehicles with limited battery package size. However, the Achilles' Heel in Li-Te batteries is the huge volume change and inevitable shuttle effect of polytellurides during cycling. Herein, we synthesize a cathode material based on polycrystalline Te encapsulated in N-doped multiwall carbon nanotubes (Te-filled CNTs) by physical vapor transport (PVT) method. With unique spatial restriction of the CNT hosts, the electrochemically active Te content can be well preserved, and the prepared Te-filled CNTs cathodes deliver a high specific capacity of 590 mAh g-1 based on Te content. More importantly, the reaction kinetics and electrochemical reversibility of the cathodes have been significantly improved by using nanoscale cavities (4-6 nm) by which the polytellurides are stabilized. Meanwhile, a series of in situ Raman, XRD and TEM characterizations are carried out to reveal a two-step discharge/charge mechanism for Te-filled CNTs, which is the key for the excellent cycling stability. In addition, theoretical calculations prove that the encapsulated Te ensure a lower energy barrier for lithiation compared with bare CNT. This work sheds light on the nanoconfinement effect of CNT for improving the utilization and cycling stability of Te in Li-Te batteries, and provides a new strategy of designing high-performance group VIA element based cathodes. © 2023, The Authors. All rights reserved.

关键词： Cathodes

Direct orientational epitaxy of wafer-scale 2D van der Waals heterostructures of metal dichalcogenides

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National Science Review 2025年第5期 315-324页

作者： Shenghong Liu Ke Qin Jiashu Yang Tao Hu Hao Luo Jingsong Wu Zhen Cui Taotao Li Feng Ding Xinran Wang Yuan Li Tianyou Zhai State Key Laboratory of Materials Processing and Die & Mould Technology School of Materials Science and EngineeringHuazhong University of Science and Technology School of Materials Science and Engineering Xi'an University of Technology Suzhou Laboratory State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Nanostructure Research CenterWuhan University of Technology School of Integrated Circuits Nanjing University Research Institute of Huazhong University of Science and Technology in Shenzhen

Two-dimensional（2D） van der Waals（vdW） heterostructures have emerged as a groundbreaking candidate for future integrated circuits due to their tunable band structures,atomically sharp interfaces and seamless compatibility with complementary metal-oxide-semiconductor *** their promise,existing synthesis methods,such as mechanical transfer and vapor-phase conversion,struggle to achieve the high-quality,scalable production for practical *** response to these longstanding challenges,our study unveils for the first time the direct epitaxial growth of wafer-scale 2D vdW heterostructures（MoS2/SnS2） with exceptional quality and *** achievement is made possible through fundamentally enhancing the adsorption interactions between intermediates and the underlying *** heterostructures display pristine,defect-free interfaces,consistent crystal orientation and wafer-level thickness *** Raman peak shifts of MoS2and SnS2are constrained to below 0.5 cm-1across the entire wafer,with intensity deviations maintained within an impressive 2%,and thickness uniformity surpassing 99.5%.Owing to their exceptional crystallinity and interface quality,the heterostructures demonstrate extraordinary electron and hole transfer capabilities,showcasing a prominent rectification effect and an astounding responsivity of 6.28 ± 10～3 A/W,averaged from 30 *** study signifies a pivotal advancement for the integration of 2D materials into semiconductor technologies,paving the way for next-generation integrated circuits.

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Non-equivalent D-A copolymerization strategy towards highly efficient polymer donor for polymer solar cells

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Science China Chemistry 2021年第6期64卷 1031-1038页

作者： Ziya Shang Liuyang Zhou Chenkai Sun Lei Meng Wenbin Lai Jinyuan Zhang Wenchao Huang Yongfang Li Beijing National Laboratory for Molecular Sciences CAS Key Laboratory of Organic SolidsInstitute of ChemistryChinese Academy of SciencesBeijing 100190China School of Chemical Science University of Chinese Academy of SciencesBeijing 100049China College of Chemistry Green Catalysis CenterZhengzhou UniversityZhengzhou 455001China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen ValleyFoshan 528216China Laboratory of Advanced Optoelectronic Materials College of ChemistryChemical Engineering and Materials ScienceSoochow UniversitySuzhou 215123China

D-A copolymerization is a broadly utilized molecular design strategy to construct high efficiency photovoltaic materials for polymer solar cells(PSCs),and all the D-A copolymer donors reported till now are the alternate D-A copolymers with equal D-and ***,we first propose a non-equivalent D-A copolymerization strategy with unequal D-and A-units,and develop three novel non-equivalent D-A copolymer donors(PM6-D1,PM6-D2 and PM6-D3 with D/A unit ratio of 1.1:0.9,1.2:0.8 and1.3:0.7,respectively)by inserting more D units into the alternate D-A copolymer PM6 backbone to finely tune the physicochemical and photovoltaic properties of the *** three non-equivalent D-A copolymers show the down-shifted highest occupied molecular orbital(HOMO)energy levels,higher hole mobility,higher degree of molecular self-assembly and higher molecular crystallinity with the increase of D-unit ratio in comparison with the alternate D-A copolymer *** a result,all the three non-equivalent D-A copolymer-based PSCs with Y6 as acceptor achieve improved power conversion efficiency(PCE)with higher V_(oc),larger J_(sc)and higher FF ***,the PM6-D1:Y6 based PSC achieved a high PCE of17.71%,which is significantly higher than that(15.82%)of the PM6:Y6 based PSC and is one of the highest performances in the binary PSCs.

关键词： polymer solar cells conjugated polymer donor materials donor-acceptor copolymers non-equivalent D-A copolymerization

Ionic Liquid-Grafted Mxene Composite Polymer Electrolytes for High-Performance Solid-state Batteries

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SSRN 2025年

作者： Li, Yu Qian, Zhi Qiu, Zhao-Dong Wang, Rui-Qing Wei, Mei-Tong Fei, An-Min Hu, Zhi-Yi Mohamed, Hemdan S.H. Chen, Li-Hua Su, Bao-Lian State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Wuhan University of Technology Wuhan430070 China Physics Department Faculty of Science Fayoum University El Gomhoria Street Fayoum63514 Egypt University of Namur NamurB-5000 Belgium

All-solid-state batteries (ASSBs) have obtained much attention due to the high energy density and security. At present, PEO-based solid-state batteries are considered to be one of the most promising candidates for high-performance ASSBs due to the excellent processability and good interfacial stability. However, low ionic conductivity and Li+ transference number seriously hinder their progress in practical applications. Here, a novel filler is developed by embedding ionic liquid (IL) grafted onto the surface of MXene to improve the electrochemical performance of PEO-based solid composite polymer electrolyte (MXene-IL-SPE) for ASSBs. The 2D MXene can significantly reduce the crystallinity of PEO, and the presence of IL not only enhances the dispersion of MXene in the polymer matrix, but also promotes the dissociation of lithium salts and anchors anions. As a result, the MXene-IL-SPE possesses high ionic conductivity (7.19 × 10-4 S cm-1) and Li+ transference number (0.51), together with wide electrochemical window (5.2 V) at 60 °C. The assembled LiFePO4|MXene-IL-SPE|Li full cell exhibits remarkable rate capability and exceptional capacity of 154.8 mAh g-1 over 120 cycles with an impressive 95.3% capacity retention at 0.5 C. This design opens up a new way to prepare high performance CPEs for ASSBs. © 2025, The Authors. All rights reserved.

关键词： Solid-state Batteries

Vertical‑Aligned and Ordered‑Active Architecture of Heterostructured Fibers for High Electrochemical Capacitance

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advanced Fiber materials 2024年第1期6卷 312-328页

作者： Xiaolin Zhu Hui Qiu Yang Zhang Zengming Man Wangyang Lu Ningzhong Bao Guan Wu National Engineering Lab for Textile Fiber Materials and Processing Technology Zhejiang Sci-Tech UniversityHangzhou 310018People’s Republic of China Zhejiang Provincial Innovation Center of Advanced Textile Technology Shaoxing 312000People’s Republic of China State Key Laboratory of Materials‑Oriented Chemical Engineering College of Chemical EngineeringNanjing Tech UniversityNanjing 210009People’s Republic of China

Architecture of fibrous building blocks with ordered structure and high electroactivity that enables quick charge kinetic transport/intercalation is necessary for high-energy-density electrochemical ***,we report a heterostruc-tured molybdenum disulfide@vertically aligned graphene fiber(MoS_(2)@VA-GF),wherein well-defined MoS_(2)nanosheets are decorated on vertical graphene fibers by C-O-Mo covalent *** from uniform microfluidic self-assembly and confined reactions,it is realized that the unique characteristics of a vertical-aligned skeleton,large faradic activity,in situ interfacial connectivity and high-exposed surface/porosity remarkably create efficiently directional ionic pathways,interfa-cial electron mobility and pseudocapacitive accessibility for accelerating charge transport and intercalation/*** MoS_(2)@VA-GF exhibits large gravimetric capacitance(564 F g^(-1))and reversible redox transitions in 1 M H_(2)SO_(4)***,the MoS_(2)@VA-GF-based solid-state supercapacitors deliver high energy density(45.57 Wh kg-1),good cycling stability(20,000 cycles)and deformable/temperature-tolerant *** that,supercapacitors can realize actual applications of powering multicolored optical fiber lamps,wearable watch,electric fans and sunflower toys.

关键词： Vertical-aligned structure Ion directional diffusion Microfluidic assembly Electrochemical supercapacitors High capacitance Self-powered applications

Tuning the Oxygen Vacancies and Mass Transfer of Porous Conductive Ceramic Supported Irox Catalyst Via Polyether Derived Composite Oxide Pyrolysis: Toward a Highly Efficient Oxygen Evolution Reaction Catalyst for Water Electrolysis

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SSRN 2023年

作者： Zhang, Hao Zhu, Liyan Shen, Yuhan Wu, Mingjuan Tian, Tian Tang, Haolin State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory Xianhu Hydrogen Valley Foshan528200 China Hubei Key Laboratory of Fuel Cell Wuhan430070 China

Slow oxygen evolution reaction (OER) and material transport impedance in catalyst coated membrane (CCM) are major challenges for the practical proton exchange membrane water electrolyzer (PEMWE). Herein, we present a novel OER catalyst with a multilevel porous support and abundant oxygen vacancies to boost efficiency and durability in water electrolysis. The formation of a heterointerface with abundant oxygen vacancies in IrOx improves the catalytic activity and prevents IrOx from peroxidation. Furthermore, the unique pore structure of the support facilitates the mass transport of the anode catalyst layer during water electrolysis at high current density, and the material transport resistance of the water electrolyzer is only 0.0154 Ω cm2 at 1.5 A cm-2. When used in a PEMWE, the prepared electrocatalysts have an impressive electrochemical performance of 1.87 V at 3·A cm-2 with an Ir loading of only 0.91 mg cm-2. This approach highlights the importance of oxygen vacancies and transportation in the catalyst-support interface, providing a promising solution for high-rate practical water electrolysis. © 2023, The Authors. All rights reserved.

关键词： Mass transfer

Enhanced Ablative Resistance of C/C Composites with Densified Zrb2-Based Ceramics by Incorporation of Mo as Interface Layer

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SSRN 2022年

作者： Zou, Hailiang Zhang, Jinyong Zou, Ji Ping, Hang Wang, Weimin Ren, Lin Fu, Zhengyi Zhang, Fan The State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China Hubei LongZhong Laboratory Xiangyang441100 China

ZrB 2 -ZrC-SiC-Mo-C/C (ZZS-Mo-C/C) composites were synthesised in this study using reaction spark plasma sintering at a low temperature. Furthermore, we investigated the densification process, microstructure, interfacial bonding, ablative properties, and underlying mechanism of the ZZS-Mo-C/C composites. Before and after ablation, the specimen exhibited excellent interfacial bonding, indicating that the presence of the Mo-foil transition layer enables an optimal connection between ZZS and C/C. Additionally, SEM analysis revealed that the ZZS ceramics had a dense structure, thereby preventing oxygen from diffusing further into the matrix. The results indicate that ZZS-Mo-C/C exhibits superior oxidation resistance when exposed to an oxygen-acetylene flame. © 2022, The Authors. All rights reserved.

关键词： Oxidation resistance

Ultrafast synthesis of Nanoscale Metal Borides for Efficient Hydrogen Evolution

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Angewandte Chemie - International Edition 2025年第14期64卷 e202425257页

作者： Liu, Tingting Chen, Chen Pu, Zonghua Huang, Qiufeng Jiang, Jiadong Han, Min Chen, Wei Yu, Guangtao Sun, Yuzhi Huang, Shengyun Chen, Qingjun Al-Enizi, Abdullah M. Nafady, Ayman Mu, Xueqin Mu, Shichun Fujian Key Laboratory of Polymer Materials College of Chemistry and Materials Science Fujian Normal University Fujian Fuzhou350117 China Fujian Normal University Fujian Fuzhou350117 China Ganjiang Innovation Academy Key Laboratory of Rare Earths Chinese Academy of Sciences Ganzhou341000 China Department of Chemistry College of Science King Saud University Riyadh11451 Saudi Arabia State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Nanoscale metal borides, with exceptional physicochemical properties, have been attracted widespread attention. However, traditional synthesis methods of metal borides often lead to surface coking and large particle sizes. Herein, we have employed a flash Joule heating (FJH) technique to enable the ultrafast synthesis of metal boride nanomaterials. The synthesized materials encompass a wide range of diverse categories, including alkaline-earth metal borides (CaB6), transition metal borides (TiB2, VB2, CrB2, MoB, MoB2, MnB2, MnB4, FeB, CoB, NiB), noble-metal borides (RuB2, RuB1.1), and rare-earth metal borides (lab6, CeB6). As an example, the RuB2 demonstrates highly desirable electrocatalytic performance for all-pH hydrogen evolution reaction (HER). Especially, under the acidic condition, it exhibits an overpotential as low as 15 mV at a current density of 10 mA cm−2, with a nearly 100 % faradic efficiency. Additionally, in situ Raman spectra confirm that both Ru and B sites serve as active sites for the HER. Moreover, the stability of RuB2 can be further enhanced by optimizing the microenvironments of the anolyte composition (H+, K+). More importantly, the experimental and density functional theory (DFT) calculations reveal that the co-existence of H+ and K+ localized around the RuB2 plays a crucial role in further enhancing the stability. © 2025 Wiley-VCH GmbH.

关键词： Joule heating

Controlled Incorporation of Zn into Nitrogen-Doped Porous Carbon Boosts the Alcohol Dehydrogenation to Carboxylic Acids

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SSRN 2024年

作者： Gu, Jun-Fei Chen, Cheng Chaemchuen, Somboon Sang, Wei Li, Xing-Chuan Yuan, Ye Kou, Zongkui Verpoort, Francis State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology 122 Luoshi Road Wuhan430070 China Sanya Science and Education Innovation Park of Wuhan University of Technology Sanya572000 China 6 Miklukho-Maklaya Str. Moscow117198 Russia

The dehydrogenation of primary alcohols to carboxylic acids is a crucial process in chemical industries such as fibers and plastics. Carboxylic acids, the resulting products, are not only important chemical raw materials but also fundamental pharmaceutical intermediates. Zn-based catalysts have gained attention as a promising option for this transformation owing to their economic cost and abundant reserves. However, stability issues, including structure collapse and morphological changes, have plagued the reported Zn-based catalysts during this transformation. In response to these challenges, this study focused on the design and development of Zn-based catalysts via controlled incorporation of Zn into nitrogen-doped porous carbon to modulate the numbers of defects and Lewis acid-base site pairs. Through extensive screening of various parameters, the best-performing catalyst, namely Zn@NC-800, exhibited high activity and remarkable stability, surpassing all the reported Zn-based catalysts. Moreover, this catalyst demonstrated great recyclability since it could maintain approximately 90% yields after 9 cycles. Notably, the product formation rate of this catalyst could reach 3833 μmol·gcat-1·h-1, exceeding that of most reported non-noble metal heterogeneous catalysts. Consequently, this study offers a promising approach for efficiently and stably catalyzing alcohol dehydrogenation reactions using non-noble metals. © 2024, The Authors. All rights reserved.

关键词： Carboxylic acids