CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ruiqi Che,Sha Cheng,Cheng Huang,Ming Liu,Zhongao Chen,Jin Han,Wen Chen,Pengchao Zhang
Lithium dendrites, growing during the charging and discharging processes, can pierce the separators and lead to internal short circuits, which is one of the main factors resulting in thermal runaway of lithium metal batteries (LMBs). In this work, we developed a poly(vinylidene fluoride) (PVDF)-based Janus separator with an ultrathin polypyrrole (PPy) layer towards efficiently suppressing lithium dendrite growth. The PPy layer with thickness of approximately 200 nm has Pyrrole-N with lone pairs of electrons, which can act as nucleation sites for lithium ions. As a result, lateral lithium deposition can be achieved on the anode, thus preventing the lithium dendrites from piercing the separators. Stable stripping/plating performance over extended cycling and a capacity retention rate of 76.8% after 1000 cycles have been achieved in the Janus PVDF/PPy separator-based Li//Li symmetric cells and Li//LiFePO 4 half cells, respectively. The development of Janus separators with conductive polymer layers presents a promising solution for improving the safety and electrochemical performance of LMBs.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2024
·
IF 7.7
Chao Li,Tongtong Yun,Yehan Tao,Jie Lu,Chaoxu Li,Jian Du,Haisong Wang
Incorporating biopolymers into two-dimensional transition metal carbides and/or nitrides (2D MXene) has been demonstrated as an effective strategy to improve the mechanical behaviors of MXene-based composites. However, the insulate nature of biopolymers inevitably deteriorated the electrical conductivity and the sensitivity of assembled sensors. Herein, a novel cellulose nanofiber (CNF)/MXene/carbon black (CB) composite was demonstrated as the conductive layer in eco-friendly cellulose paper-based sensors by intercalating the CB into the MXene/CNF interlayer, followed by coating hydrophobic SiO 2 for encapsulation. Befitting from the high-density crack-microstructures between CB and MXene, the fabricated superhydrophobic paper CB/CNF/MXene/SiO 2 sensor delivered ultrahigh sensitivity of 729.52 kPa −1 , low detect limit of 0.29 Pa, rapid response time of 80 ms and excellent stability over 10,000 cycles. Moreover, the fabricated sensor was capable of detecting the physiological parameter of human ( e.g. huge/subtle movements) and spatial pressure distribution. Furthermore, the presence of SiO 2 layer endowed the sensor with superhydrophobic performance (water contact angle ∼158.2 o ) and stable electrical signals under high moisture conditions or even under water. Our work proposed a novel strategy to boost the sensitivity of MXene-based conductive layer in flexible electronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Solar RRL
·
2025
·
IF 4.7
Yongliang Lai,Bowen Liu,Dongdong Shen,Zhuoer Deng,Xinan Shi,Daocheng Pan
Indium tin oxide (ITO) is usually served as the transparent conductive electrode of Cu(In, Ga)(S, -Se) 2 (CIGSSe) solar cells. However, ITO is fabricated by sputtering method, which will increase the cost of CIGSSe solar cells and prevent its large-scale market applications in the future. Hence, it is particularly important to develop low-cost transparent conductive window layers to replace the traditional ITO. Silver nanowires (AgNWs) are considered to be the most promising alternative to ITO. Compared with sputtered ITO, AgNWs have the advantages of high transmittance, low cost, and easy fabrication. Nevertheless, the poor adhesion and stability of AgNWs can prevent the transportation of carriers of CIGSSe solar cells. Here, we select amorphous TiO x as an adjuvant to fabricate AgNWs/TiO x composite transparent conductive layer to substitute the traditional ITO. Under the assistance of TiO x matrix, not only the connection, adhesion, and stability of AgNWs are greatly enhanced, but also the surface roughness of AgNWs is also reduced. The influence of AgNWs concentration on the performance of CIGSSe solar cells is investigated. When the AgNWs concentration is 2.5 mg/mL, the transmittance and sheet resistance of AgNWs thin film are 93.35% and 93 Ω/sq, respectively, and the devices achieved the highest efficiency of 13.59%.
研究领域:
材料科学
·
能源技术
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Pan Wu,Tianyu Yu,Mingjun Chen,Nan Kang,Mohamed El Mansori
Shape memory polymers (SMPs) are smart materials that enable to transform back to their original shape from the deformed state when subjected to external stimuli. They have shown great potential used as sensors and actuators in diverse applications. However, current research on SMPs primarily focuses on the utilization of a single source of stimuli (e.g., electricity, magnetism, light, etc.), which heavily restricts their potential in complex circumstances. In this study, a novel approach is developed to fabricate multi-layer electrically/magnetically dual-driven shape memory composites (ML-EMSMCs) based on a magnetic field-assisted digital light processing (MF-DLP) 4D printing technique. The fabricated ML-EMSMCs contain alternating high electric conductive layers (up to 5.37 × 10 −3 S cm −1 ) and magnetic responsive layers (10.7 emu g −1 ), enabling Joule heat-based and high-frequency magnetic field induction-based stimuli. Furthermore, the ML-EMSMCs exhibited excellent shape memory behavior, good formability, and magnetic properties. The developed 4D printing techniques allows for the alignment of magnetic particles with a unidirectional magnetic field, significantly improving their shape recovery speed. The developed electrically/magnetically dual-driven and photocurable SMP composites shed light on the development of actuators and sensors with multiple functionalities.
研究领域:
材料科学
·
智能材料
·
3D打印技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2021
·
IF 17.881
Chan Liu,Dong-Liang Shan,Zhong-Hui Shen,Guang-Kun Ren,Yue-Wang,Zhi-Fang Zhou,Jiang-Yu Li,Di Yi,Jin-Le Lan,Long-Qing Chen,G. Jeffery Snyder,Yuan-Hua Lin,Ce-Wen Nan
The interface is always a critical factor affecting thermoelectric performance in composite systems . However, understanding the electrical and thermal transport behaviors at the interfaces has been a long-standing challenge. Here, we advance this understanding by using spatially resolved current and thermal measurements in single wall carbon nanotubes (CNTs)-Tellurium-poly(3,4-ethylenedioxythiophene): poly(4-styrenesulfonate) (PEDOT:PSS) nanocomposites . Our results indicate that the obtained ultra-low thermal conductivity in such nanocomposites with high CNTs content can be understood by the interface thermal resistance and interface density of the clusters, which is directly confirmed by quantitative mappings of thermal conductivity in the micro-scale interface regions via scanning thermal microscopy. Furthermore, the highly conductive layers can be formed at the interfaces of Te - PEDOT:PSS and CNTs - PEDOT:PSS revealed by high-resolution local conductivity and topography mapping, leading to simultaneous enhancement of electrical conductivity and Seebeck coefficient . Ultimately, a power factor of 224 µW/mK 2 , as well as an ultralow in-plane thermal conductivity of 0.39 W/mK at 410 K, has been achieved by tuning carrier mobility and phonon scattering using multiple polymer-inorganic interfaces. The ZT value reaches up to 0.24 at 410 K and a planar flexible thermoelectric generator exhibits excellent output power of 1.33 μW and highly competitive normalized maximum power density of 0.26 W/m at a temperature difference of 67.8 K These approaches give deep insights to understand the interface role in nanocomposites, and also attests to the great potential of using such organic–inorganic composites in wearable electronics .
研究领域:
材料科学
·
纳米技术
·
能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2023
·Vol. 52
·期 8
·5422-5429
·
IF 2.1
Xu Jiaxiong,Wu Xiaoshuai
Chalcogenide Cu 2 ZnSn(S,Se) 4 (CZTSSe) is a promising absorber material for photovoltaic applications. When CZTSSe thin film is deposited on an Mo substrate, a Mo(S,Se) 2 layer easily forms between the CZTSSe and the Mo, which is detrimental to the back contact property of the CZTSSe. This work proposes a useful way to inhibit the formation of Mo(S,Se) 2 by sputtering a CuCrO 2 layer on a Mo-foil substrate before the deposition of the CZTSSe. The effects of CuCrO 2 thickness on the crystalline structures, morphologies, and electrical properties of the fabricated samples were studied. The results showed that the insertion of the CuCrO 2 layer prevented the formation of Mo(S,Se) 2 . As the thickness of the CuCrO 2 increased, the thickness of the Mo(S,Se) 2 layer decreased. The Mo(S,Se) 2 layer was absent from the cross-sectional scanning electron microscopy image when the CuCrO 2 thickness exceeded 85 nm. The back contact resistance of CZTSSe decreased monotonously as the CuCrO 2 layer thickened due to the reduction in the Mo(S,Se) 2 layer thickness. Therefore, by inserting a CuCrO 2 layer to separate the CZTSSe and the Mo-foil, the formation of the Mo(S,Se) 2 layer between them was effectively suppressed, and the back contact properties of the CZTSSe thin film were significantly enhanced.
研究领域:
材料科学
·
光伏技术
·
薄膜太阳能电池
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Bing Ji,Qian Zhou,Jinbo Wu,Yibo Gao,Weijia Wen,Bingpu Zhou
Recently, wearable pressure sensors have attracted considerable interest in various fields such as healthcare monitoring, intelligent robots, etc. Although artificial structures or conductive materials have been well developed, the trade-off between sensitivity and linearity of pressure sensors is yet to be fully resolved by a traditional approach. Herein, from theoretical analysis to experimental design, we present the novel CPDMS/AgNWs double conductive layer (DCL) to synergistically optimize the sensitivity and linearity of piezoresistive pressure sensors. The facilely fabricated solid microdome array (SDA) is first employed as the elastomer to clarify the unrevealed working mechanism of DCL. Attributed to the synergistic effect of DCL, the DCL/SDA based sensor exhibits ultrahigh sensitivity (up to 3788.29 kPa–1) in an obviously broadened linearity range (0–6 kPa). We also demonstrated that the synergistic effect of DCL can be regulated with use of porous microdome array (PDA) to further optimize the sensing property. The linearity range can be improved up to 70 kPa while preserving the high sensitivity of 924.37 kPa–1 based on the interlocked PDA structure (IPDA), which is rarely reported in previous studies. The optimized sensitivity and linearity allow the competitive DCL/IPDA based sensor as a reliable platform to monitor kinds of physiological signals covering from low pressures (e.g., artery pulses), medium pressures (e.g., muscle expansions), to high pressures (e.g., body motions). We believe that the methodology along with the robust sensor can be of great potential for reliable healthcare monitoring and wearable electronic applications in the future.
研究领域:
材料科学
·
生物医学工程
·
可穿戴设备
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MACROMOLECULAR MATERIALS AND ENGINEERING
·
2020
·Vol. 305
·期 4
·1900835
·
IF 3.853
Yi Yang,Ling-yan Li,Bo Yin,Ming-bo Yang
Conductive composites based on polymers and conductive nanofillers are widely studied as a promising material. The rational design of 3D conductive networks in composites is crucial to improve their electrical conductivity and reduce the dosage of nanofillers. Herein, poly(vinylidene fluoride) (PVDF) and polystyrene (PS) bi-continuous structures with modified carbon nanotubes (CNTs) tailored to anchor at the interface are designed to achieve an ultralow electrical percolation threshold because of the formation of a thin interfacial conductive layer. In this work, the modification of CNTs with poly(methyl methacrylate) (PMMA), which contributes to the improvement of the compatibility between PVDF and CNTs, is effective to control the distribution of CNTs in composites. It promotes the migration of CNTs from the PS phase to the interface of PVDF and PS. Consequently, the interfacial conductive layer is formed at a low CNT content, and the electrical percolation threshold of PVDF/PS/CNTs-PMMA nanocomposites is only 0.07 vol%, having a great decrease of about 50% compared with that of PVDF/PS/CNTs nanocomposites. Thus, it is demonstrated that the distribution of CNTs can be tailored to anchor at the interface by proper chemical modification to form an interfacial conductive layer and a decrease of percolation threshold can also be achieved.
研究领域:
材料科学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2023
·
IF 9.1
Xiaoyuan Pei,Guangde Liu,Haiting Shi,Rongrong Yu,Shuo Wang,Shengkai Liu,Chunying Min,Jianan Song,Ruiqi Shao,Zhiwei Xu
Some special electronic equipment not only need to avoid the interference of external electromagnetic waves (EMWs), but also need to transmit effective signals. Therefore, the development of directional electromagnetic interference (EMI) shielding materials has a great prospect. The asymmetric structure, consisting of the porous magentic rGF (reduced graphene oxide and Fe 3 O 4 ) layer and the dense electrical conductivity rGM (reduced graphene oxide and MXene) layer, was constructed by dual-needle 3D printing technology. After encapsulation and curing with polydimethylsiloxane (PDMS), the rGF/rGM/PDMS composites were prepared. When the ratio of rGF and rGM layers is 6:4, the SE values of rGF-6/rGM-4/PDMS composites are 38.75 dB and 30.79 dB respectively when EMWs are incident on the rGF layer and rGM layer respectively, and the ΔSE of which is about 8 dB. The results showed that the asymmetric structure composed of porous magnetic layer and dense deeply electric conductive layer could generate a special process of "weak reflection-absorption-strong reflection-reabsorption" for incident EMW. At the same time, the simulation results of the waveguide method validated the experimental results, and further explained the directional EMI shielding mechanism of asymmetric structure. For the first time, this work designs an asymmetric structure based on the double needle 3D printing technology, which provides useful inspiration for the structural design and potential application of directional EMI shielding materials.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2019
·Vol. 25
·期 45
·10642-10649
·
IF 5.16
Jiantao Huang,Jijian Xu,Xiangli Che,Chong Huang
Graphical Clash of titanium oxide : A novel composite structure of TiO 2− x with conductive TiO layer is synthesized in one step by an unforeseen dismutation reaction and performs full-spectrum absorption. Black TiO 2− x attracts enormous attention due to its large solar absorption and improved conductivity. In this work, a novel structure of TiO 2− x with conductive TiO layer, performing full-spectrum absorption, was synthesized in one step by the unforeseen dismutation reaction of titanium sub-oxides (Ti n O 2 n −1 ) in ammonium halide atmosphere. For this new reaction, a possible mechanism of decomposition-etching-disproportionation-rehydrolysis process was proposed. The vital intermediate reactant TiCl 4 , which verifies the assumption, has been captured in the form of (NH 4 ) 2 TiCl 6 , especially where Ti 2 O 3 is the reactant. Furthermore, this work not only can nominate TiO as an alternative for noble metals or carbon materials in the aim to improve the electron conductivity and solar absorption of black TiO 2− x , which are important in electrochemistry and optoelectronics fields, but also can be a new route to synthesize special structures for other multivalent transition metals.
研究领域:
材料科学
·
化学工程
·
光电领域
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IEEE SENSORS JOURNAL
·
2021
·Vol. 22
·期 1
·405-411
·
IF 3.301
Guodong Wang,Jiajia Yan,Xiaofeng Yang,Xinlin Qing
With the rapid development of the flexible electronics field, flexible pressure sensors are widely used in wearable devices, medical monitoring and other fields. However, it is still a huge challenge to design a sensor with high sensitivity, low cost and a simple manufacturing process. In this paper, a resistive pressure sensor based on a composite conductive layer is developed. The polydimethylsiloxane (PDMS) is used as the matrix of the composite. The electrolyte fully absorbed by the super absorbent polymer (SAP
+
) and used as the conductive filler of the composite. The elastic polymer is used to replace the common rigid conductive fillers (such as carbon nanotubes, graphene, etc.), can be better combined with the matrix, greatly improving the stability and reducing the Young’s modulus of the sensor. After describing the working mechanism of the sensor, the influence of the composite conductive layer of different thicknesses and the content of SAP
+
on the electrical output of the sensor is discussed. In addition, the sensor exhibits high sensitivity (0.062 kPa
−1
), a fast response time (0.136 s) and excellent cyclic loading/unloading stability (>500 cycles).
研究领域:
材料科学
·
电子工程
·
生物医学工程
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Chen Li,Dongting Ye,Jiangbo Tan
Recombination layer engineering is a key enabler in monolithic perovskite/silicon tandem solar cells, where charge extraction and optical management must be simultaneously optimized. In this study, we introduce a composite Ti 3 C 2 T x MXene/indium zinc oxide (IZO) interlayer as a tunable recombination layer to enhance both electrical and optical performance in two-terminal tandem architectures. The interlayers were fabricated by integrating few-layer Ti 3 C 2 T x MXene flakes into an IZO matrix, forming a conductive yet transparent network. Systematic tuning of MXene content revealed that the sample with 10 vol% (MX-10) offered a low resistivity (∼1.69 mΩ·cm), and high optical transmittance. EIS and TRPL analyses demonstrated improved charge recombination dynamics and enhanced carrier extraction. When implemented in monolithic tandems, the MX-10-based device achieved a PCE of 26.67%, outperforming the ITO-based control device (24.40%), with improved J SC and FF. Long-term stability testing over 1000 hours under continuous illumination revealed only 9.5% degradation in MX-10 devices, confirming the material's promise for practical applications. Our findings highlight the synergistic role of MXene and IZO in constructing an efficient, transparent, and stable interfacial layer for next-generation tandem photovoltaics.
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）