ADVANCED FUNCTIONAL MATERIALS
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2024
·Vol. 34
·期 30
·2316036
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IF 18.5
Dongxiang Zhu,Jie Zhang,Panpan Li,Zhan Li,Hongxuan Li,Xiaohong Liu,Tianbao Ma,Li Ji,Huidi Zhou,Jianmin Chen
Superlubricity, a cutting-edge concept, has the potential to drive the Fourth Industrial Revolution giving its near-zero energy consumption, but the challenge is how to achieve it in humid air with chemical activity and at macroscale surfaces with unavoidable defects. Here, a novel principle involving the amorphous/crystalline friction pair based on the cognition that tribochemical interaction sites originate from grain boundary defect locations is proposed to achieve macroscale superlubricity in humid air. The absence of grain boundaries in amorphous diamond-like carbon (DLC) significantly reduces chemical interaction during the sliding process. This is supported by experimental observations of priority oxidation at the grain boundaries. Results indicate DLC versus MoS 2 friction pair has weakened chemical interaction and less humid insensitivity compared to the MoS 2 versus MoS 2 pair, even increasing the contact area. Theoretical simulation suggests that DLC versus MoS 2 pair eliminates the cross-linking of friction interlayers induced by the enrichment of H 2 O molecules at MoS 2 defects. The robust superlubricity is achieved for the typical friction pair of DLC versus MoS 2 in air (RH≤25%) at macroscopic contact pressure (1.1 GPa) with friction coefficient in 10 −3 magnitude and extra-long anti-wear life (more than 2 × 10 5 cycles), which is of significance for the industrialization of superlubricity.
研究领域:
材料科学
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摩擦学
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表面工程
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Wenda Zhou,Zhenzhen Jiang,Mingyue Chen,Zhaohui Li,Xingfang Luo,Manman Guo,Yong Yang,Ting Yu,Cailei Yuan,Shouguo Wang
Owing to tip effect can introduce localized enhanced electric field and reduce interfacial energy barrier, design of atomic tip structure in single-atom catalysts (SACs) may be a fascinating strategy to further improve its electrocatalytic activity. However, conventional synthesis methods, such as defect-trapping or substitution, only lead to the formation of planar geometry of SACs without tip atoms. Good conductive 1T-TMDs with electrocatalytically active basal plane can provide platform to directly stabilize single atoms (SAs) on the top sites of its surface to form atomic tip structure. Herein, a universal Laser-molecular beam epitaxy (L-MBE) method for precisely controlling non-noble metal SAs directly immobilizing on the Cr top site of 1T-CrS 2 metallic basal plane is developed. In case of Mo, the Mo SAs@1T-CrS 2 with single-atom tip structure can exhibit enhanced electric field surrounding Mo atoms and an almost zero hydrogen adsorption free energy, resulting in superior HER performance together with high stability. This work provides a general way to design varieties of SACs in widely catalytic application.
研究领域:
材料科学
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电化学
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纳米催化
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能源材料
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表面科学
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DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2025
·
IF 9.7
Nousheen Iqbal,Usman Ghani,Ahmed A. Aboalhassan,Aijaz Ahmed Babar,Qinglei Liu,Di Zhang
Sodium-ion batteries (SIBs) have been deemed promising substitutes for lithium-ion batteries (LIBs), but challenges remain in pursuing high flexibility, high-rate performance, as well as cycling sustainability. In this work, a novel interface-coupled hybrid electrode is designed by combining atomically thin, two-dimensional (2D) transition-metal dichalcogenides (TMD) molybdenum disulfide (MoS₂) and tungsten disulfide (WS₂) nanosheets onto carbon nanofiber (CNF) scaffolding to create a hierarchical mixed phase 2D 1D hybrid structure via precision exfoliation-deposition approaches. MoS₂-CNF (M-CNF) and WS₂-CNF (W-CNF) mixed phase (1 T/2H) hybrid nanocomposites possess controllable nanosheet thickness, defects, as well as strong interfacial interactions. The results from comprehensive characterization analysis include strong interfacial bonds, uniform nanosheet distribution, which promote electron transport routes as well as flexibility. The main findings for M-CNF showed ~673 mAh/g capacity, initial coulombic efficiency (ICE) of ~83 %, whereas W-CNF showed ~461 mAh/g capacity retention; in addition, they showed high-rate discharge capabilities with ~600 consecutive cycles collectively verifying the hypothesis of optimized interfacial interactions for charge transport as well as flexibility benefits. This study forges a new scalable mixed phase electrode platform, contributing to fundamental insights into interface-coupled hybrid in flexible energy storage technologies offering an avenue to more efficient applications for high-performance wearable SIBs.
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高影响因子
Nature Communications
·
2024
·Vol. 15
·期 1
·1-9
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IF 14.7
Gong Cheng,Li Haiyun,Xu Zhiyuan,Li Yuheng,Wang Huaxin,Zhuang Qixin,Wang Awen,Li Zhijun,Guo Zhihao,Zhang Cong,Wang Baiqian,Li Xiong,Zang Zhigang
Fullerene derivatives are extensively employed in inverted perovskite solar cells due to their excellent electron extraction capabilities. However, [6,6]-phenyl-C 61 -butyric acid methyl ester (PCBM) agglomerates easily in solution and exhibits a relatively low ionization barrier, increasing charge recombination losses and charge accumulation in the interface. Here, tetramethylthiuram disulfide (TMDS) is introduced into the PCBM solution to induce the formation of reducing sulfur radicals through UV light irradiation, allowing for n doping of the PCBM material. The resulting modified PCBM layer exhibits enhanced conductivity and electron mobility, significantly suppressing charge recombination. As a result, the resulting devices incorporating TMDS achieve a champion efficiency of 26.10% (certified 25.39%) and 24.06% at a larger area (1.0 cm 2 ) with negligible hysteresis. More importantly, the optimized devices retain 95% and 90% of their initial efficiency after 1090 h under damp heat testing (85 °C and 85% relative humidity) and after 1271 h under maximum power point-tracking conditions, respectively.
研究领域:
材料科学
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太阳能
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光伏技术
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DOI
PubMed
高影响因子
NATURE
·
2022
·Vol. 605
·期 7908
·69-75
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IF 69.504
Liu Lei,Li Taotao,Ma Liang,Li Weisheng,Gao Si,Sun Wenjie,Dong Ruikang,Zou Xilu,Fan Dongxu,Shao Liangwei,Gu Chenyi,Dai Ningxuan,Yu Zhihao,Chen Xiaoqing,Tu Xuecou,Nie Yuefeng,Wang Peng,Wang Jinlan,Shi Yi,Wang Xinran
Two-dimensional transition-metal dichalcogenides (TMDs) are of interest for beyond-silicon electronics 1 , 2 . It has been suggested that bilayer TMDs, which combine good electrostatic control, smaller bandgap and higher mobility than monolayers, could potentially provide improvements in the energy-delay product of transistors 3 , 4 , 5 . However, despite advances in the growth of monolayer TMDs 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , the controlled epitaxial growth of multilayers remains a challenge 15 . Here we report the uniform nucleation (>99%) of bilayer molybdenum disulfide (MoS 2 ) on c -plane sapphire. In particular, we engineer the atomic terrace height on c -plane sapphire to enable an edge-nucleation mechanism and the coalescence of MoS 2 domains into continuous, centimetre-scale films. Fabricated field-effect transistor (FET) devices based on bilayer MoS 2 channels show substantial improvements in mobility (up to 122.6 cm 2 V −1 s −1 ) and variation compared with FETs based on monolayer films. Furthermore, short-channel FETs exhibit an on-state current of 1.27 mA μm −1 , which exceeds the 2028 roadmap target for high-performance FETs 16 .
研究领域:
材料科学
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纳米技术
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半导体器件
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电子学
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高影响因子
ACS Applied Materials & Interfaces
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2016
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IF 7.145
Zhouyue Lei,Wencheng Zhu,Shengjie Xu,Jian Ding,Jiaxun Wan,Peiyi Wu
A facile poly(vinylpyrrolidone) (PVP)-assisted exfoliation method is utilized to simultaneously exfoliate and noncovalently modify MoSe2 nanosheets. The resultant hydrophilic nanosheets are shown to be promising candidates for biocompatible photothermal therapy (PTT) agents, and they could also be encapsulated into a hydrogel matrix for some intelligent devices. This work not only provides novel insights into exfoliation and modification of transition metal dichalcogenide (TMD) nanosheets but also might spark more research into engineering multifunctional TMD-related nanocomposites, which is in favor of further exploiting the attractive properties of these emerging layered two-dimensional (2D) nanomaterials.
研究领域:
材料科学
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纳米技术
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生物医学工程
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诊疗学
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PubMed
高影响因子
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