Cell Reports Physical Science
·
2022
·
IF 7.832
Li Yin,Chenguang Liu,Changzeng Ding,Chun Zhao,Ivona Z. Mitrovic,Eng Gee Lim,Haibin Wang,Yi Sun,Yunfei Han,Zerui Li,Li Yang,Chang-Qi Ma,Cezhou Zhao
Summary An appropriate electron transport layer (ETL) with better energy alignment and enhanced charge transfer, thereby helping efficient extraction and transport of photogenerated carriers, is essential to achieve the creation of high-performance devices. In this work, we use functionalized MXene modified with fluoroalkylsilane and dodecyltrimethoxysilane molecules, denoted as SnO 2 -MF and SnO 2 -MH, as nanosheet dopants in the SnO 2 ETL. From density functional theory (DFT) calculations and ultraviolet photoelectron spectra (UPS) spectra, we see that better band alignment is achieved for the SnO 2 -MH ETL. Meanwhile, functionalized MXene nanosheets represent high electrical conductivity and mobility and could form zero Schottky barrier heterojunction with SnO 2 , effectively and rapidly enhancing carrier transfer. Finally, the suitable surface energy achieved by functionalized MXene additives can enlarge the grain size of perovskite thin films. Consequently, a significant improvement of power conversion efficiency (PCE) from 20.98% to 23.66% (24.12% for the champion device with a fill factor [FF] over 0.84) can be achieved for devices based on the SnO 2 -MH ETL, which also possess improved moisture resistance and operational stability.
研究领域:
材料科学
·
能源技术
·
物理化学
✓ 已验证
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2019
·
IF 3.375
Jin Liu,Ling Zhang,Chunzhong Li
While recent trends in flexible optoelectronic devices have led to a proliferation of studying transparent conductive electrodes (TCEs), maintaining the balance of high transmittance and high conductivity of TCEs remains a challenge. Herein, the collaboration of a silver nanowire (AgNW) network and new 2D Mxene nanosheets with excellent conductivity, hydrophilicity, and mechanical flexibility contributes to a highly transparent and conductive hybrid electrode through a simple, scalable, low-cost, solution-processing method. This AgNW-Mxene electrode shows a low sheet resistance of 15.9 Ω sq.–1 at an ultrahigh transmittance of 92.5% and remarkable mechanical durability and chemical stability. As a proof of concept, the AgNW-Mxene electrode is used in flexible alternating-current electroluminescent device, showing outstanding flexibility and stable illumination, which can maintain a constant illumination even under bending at 180°. This promising high-performance electrode will definitely provide a brand-new pathway for the development of flexible optoelectronic devices.
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yongqian Shi,Chuan Liu,Zaipeng Duan,Bin Yu,Minghua Liu,Pingan Song
The integration of high strength, high toughness, and excellent flame retardancy in polymer materials is highly desirable for their practical applications in the industry. However, existing material design strategies often fail to realize such a performance portfolio because of mutually exclusive mechanisms between strength and toughness, and low flame retardancy efficiency of nanofillers in polymers. Here, we reported the preparation of a multifunctional nanohybrid, Ti 3 C 2 T x @MCA, by engineering the surface of titanium carbide nanosheets (Ti 3 C 2 T x , MXene) with melamine cyanurate (MCA) via hydrogen bonding interactions, and subsequent thermoplastic polyurethane (TPU)/Ti 3 C 2 T x @MCA nanocomposites. The resultant TPU nanocomposite containing 3.0 wt% of Ti 3 C 2 T x @MCA shows a high tensile strength of 61.5 MPa, a toughness as high as 175.4 ± 7.9 MJ m −3 and a high strain at failure of 588%, and 40% reduction in the peak of heat release rate. Such extraordinary mechanical and fire retardant performances are superior to those of its previous counterparts. Interfacial hydrogen bonding in combination with the “labyrinth” effect and catalytic action of 2D Ti 3 C 2 T x nanosheets are responsible for the outstanding mechanical and fire retardancy properties of TPU nanocomposites. This work provides a new paradigm for integral design of high-performance polymeric materials with excellent mechanical and fire-safe performances portfolio.
研究领域:
材料科学
·
高分子化学
✓ 已验证
DOI
高影响因子
Scientific Reports
·
2025
·Vol. 15
·期 1
·1-14
·
IF 3.9
Liu Liming,Lian Hongxia,Deng Heming,Zhang Weixin
Challenges associated with the cathode material of Lithium–oxygen (Li–O 2 ) battery, particularly the sluggish kinetics of oxygen reduction reaction (ORR) and oxygen evolution reaction, as well as the accumulation of discharge product Li 2 O 2 , have hindered its further advancement. Here, an in-situ synthesis strategy was adopted to load a bimetallic Ni–Co metal–organic framework (Ni/Co-MOF) onto MXene (Ti 3 C 2 ) layers. Subsequently, a free-standing and flexible Ni/Co-MOF@Ti 3 C 2 hybrid membrane is prepared via a layer-by-layer self-assembly method, specifically designed for efficient ORR and as a cathode for Li–O 2 batteries. The Ni/Co-MOF@Ti 3 C 2 hybrid membrane integrates the high conductivity, unique two-dimensional layered structure, and excellent mechanical properties of Ti 3 C 2 with the bimetallic active sites of Ni/Co-MOF, exhibiting remarkable ORR catalytic activity in an O 2 -saturated 1 M LiTFSI electrolyte. The structural characteristics of the hybrid membrane provide smoother expansion pathways for Li + and O 2 , effectively promoting the deposition and decomposition of Li 2 O 2 . This not only enhances the electrochemical performance of the Li–O 2 battery but also overcomes the inherent limitations of traditional slurry-based cathode preparation methods. Experimental results demonstrate that Li–O 2 batteries utilizing the Ni/Co-MOF@Ti 3 C 2 hybrid membrane as the cathode achieve an ultra-high capacity of 36,125 mAh/g at a current density of 1000 mA/g, while exhibiting excellent cycle stability (271 cycles with a limited capacity of 1000 mAh/g at 1000 mA/g) and outstanding rate performance. The hybrid membrane’s capacity and cycle performance can be further optimized by controlling its thickness. These promising results offer novel insights into the innovative design of air cathodes for metal–air batteries, and the proposed method provides a new route for the manufacture of high-performance battery cathodes.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NEW JOURNAL OF CHEMISTRY
·
2025
·
IF 2.5
Guoyang Lv,Qiulan Lu,Zhengkun Ma,Liqi Wei,Jieying Wei,Xiongdiao Lan,Weiguo Li,Pengru Liu,Dankui Liao
This study aimed to develop a highly efficient and stable electrocatalyst for oxygen evolution reaction (OER) to enhance hydrogen production through water splitting. Layered double hydroxides (LDHs) are promising OER electrocatalysts due to their low cost, tunable composition, abundant active sites, and large specific surface areas. However, their poor conductivity, propensity for aggregation, and inherent low activity severely hinder their broader practical application. In this work, a hybrid electrocatalyst CoLaLDH/MXene composite was successfully developed through a straightforward hydrothermal synthesis approach, and it was further enhanced via sulfur doping to boost its OER performance. The prepared S-CoLaLDH/MXene electrocatalyst outperformed RuO2 and many other reported catalysts. It exhibited a low overpotential of 303 mV at 10 mA cm-2, a Tafel slope of 57 mV dec-1, and remarkable electrochemical stability. This research provides a valuable guideline for the design of high-performance LDH-based OER catalysts, and the proposed direct synthesis methodology establishes a foundation for its widespread application.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
BIOMACROMOLECULES
·
2021
·
IF 6.988
Dongning Liu,Yujiao Gao,Yiheng Song,Hengfeng Zhu,Linjun Zhang,Yuanyuan Xie,Hui Shi,Zhuqun Shi,Quanling Yang,Chuanxi Xiong
Electronic skin has aroused extensive research interest due to high similarity with human skin. Realizing a multifunctional electronic skin that is highly consistent with skin functions and endowed with more other functions is now a more urgent need and important challenge. Here, we use 2,2,6,6-tetramethylpiperidinyl-1-oxyl (TEMPO)-oxidized cellulose nanofibril (TOCN) dispersion and highly conductive Ti3C2TX dispersion to prepare TOCN/Ti3C2TX composite film through vacuum-assisted filtration. The obtained composite film imitating the nacre-like lamellar structure of natural shells has good mechanical properties (124.6 MPa of tensile strength). Meanwhile, the composite film also showed excellent electromagnetic shielding performance (36 dB), biocompatibility, and antibacterial properties. In addition, the piezoresistive sensor assembled from the composite film exhibited a high sensitivity (11.6 kPa–1), fast response and recovery time (≤10 ms), ultralow monitoring limit (0.2 Pa), and long-term stability (>10 000 cycles). It also could detect human daily activities such as finger bent, chewing, and so on.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Yinchao Zhao,Chenguang Liu,Ruowei Yi,Ziqian Li,Yanbing Chen,Yinqing Li,Ivona Mitrovic,Stephen Taylor,Paul Chalker,Li Yang,Cezhou Zhao
There is considerable scientific interest in the newly available family of MXenes material. An analog as graphene, this two-dimensional (2D) layered material with the structure of transition metal carbides or nitrides exhibits superior electronic conductivity , large interlayer spacing for highly efficient lithium ions diffusion pathways and environmental benignity, making it useful as energy storage material . However, the inferior capability to store lithium ions impedes its wide application in lithium-ion batteries. Therefore, a facile strategy for preparing Co 3 O 4 nanoparticles incorporated with MXene nanosheets on Ni foams has been developed. Small-size Co 3 O 4 nanoparticles are uniformly distributed within the MXene nanosheets leading to the highly efficient lithium ions and electrons transmission, as well as the prevention for the restacking of MXene nanosheets and huge volume change of the Co 3 O 4 nanoparticles . Under the cooperative effect of Co 3 O 4 nanoparticles and MXene nanosheets , the Co 3 O 4 /MXene composite electrode with the mass ratio of Co 3 O 4 /MXene = 1:1 exhibits an excellent reversible capacity of 1005 mAh g −1 after 300 cycles at the current density of 1 C, which significantly exceeds that of pristine Co 3 O 4 electrode. Though the current density climbs to 5 C, the composite electrode remains a stable capacity of 307 mAh g −1 after 1000 cycles. It is demonstrated that Co 3 O 4 /MXene composite electrode has the potential as an anode for the high-performance lithium-ion batteries.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2022
·
IF 7.139
Zhaojie Yang,Minghua Zhang,Zhixin Zhao,Wenting Lan,Xi Zhang,Minmin Fan
Two types of new 2D MXenes (LiF–Ti 3 C 2 T x and NH 4 HF 2 –Ti 3 C 2 T x ) were prepared by selective etching of Ti 3 AlC 2 with LiF/HCl and NH 4 HF 2 aqueous solutions, respectively, and they were introduced as nanofillers into quaternized polysulfone/polyquaternium-10 (QPSU/PQ-10) anion exchange membranes (AEMs) with semi-interpenetrating polymer network, thereby preparing two types of MXene-doped QPSU/PQ-10 AEMs. The resulting MXene-doped QPSU/PQ-10 AEMs have obvious nanoscale microphase-separated morphologies, and their ionic conductivity and power density are significantly improved compared with the pristine QPSU/PQ-10 AEM. Among them, the ionic conductivity and power density of NH 4 HF 2 –Ti 3 C 2 T x MXene-doped AEM can reach 88.76 mS/cm at 80 °C and 106.28 mW/cm 2 at 60 °C, respectively, which are 26.3% and 37.5% higher than those of the pristine QPSU/PQ-10 AEM. Additionally, the MXene-doped QPSU/PQ-10 AEMs with semi-interpenetrating network have moderate water uptake and swelling ratio, excellent thermal and mechanical properties , as well as good oxidation resistance and alkaline stability, which can meet the application requirements of AEMs for fuel cells, exhibiting their bright application prospects in fuel cells.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2020
·Vol. 22
·期 8
·1395-1403
·
IF 3.117
Jie Ren,Hui Zong,Yuyun Sun,Shijing Gong,Yu Feng,Zhenguo Wang,Le Hu,Ke Yu,Ziqiang Zhu
Two-dimensional molybdenum carbides belong to a novel family of 2D transition metal carbides/nitrides called MXenes, which have a wide range of electrochemical applications. However, the synergistic catalysis of transition metal carbides and disulfides has not been studied in depth. A strategy was proposed to prepare a 2D organ-like Mo2C MXene matrix derived from Mo2Ga2C crystals, coupled with MoS2 nanoflowers to explore the hydrogen evolution reaction (HER) of molybdenum carbides and disulfides. Compared with Mo2CTx (where Tx means F, O, and OH surface terminations) Mxene catalysts, MoS2@Mo2CTx nanohybrids showed significantly enhanced HER activity, with a low overpotential of 176 mV in alkaline media at a current density of 10 mA cm−2 and a very small overpotential of 26 Ω. Density functional theory calculations indicated that the reduction of the hydrogen adsorption energy of the MoS2@Mo2CTx nanohybrids could be attributed to fast electron transport ensured by Mo2CTx with intrinsic conductivity and a large number of hydrogen adsorption sites provided by MoS2 nanoflowers. The synthetic method is promising to tailor the specific properties by preparing organ-like molybdenum carbides coupled with MoS2 nanoflowers.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Fan Zhang,Xiaobo Zhang,Tingting Yang,Kaixiang Shi,Ying Han,Xiaolei Song,Hongyan Yao,Ying Song
The concurrent attainment of high sensitivity and broad response range in piezoresistive sensors remains a critical challenge. While single-layer MXene characterized by large interlayer spacing, high specific surface area, flexibility, and superior electrical conductivity—holds promise for enhancing sensor performance, conventional synthesis methods suffer from inefficient exfoliation and low yield, hindering practical applications. Herein, we propose a novel strategy to synthesize single-layer MXene nanosheets via a mixed-acid (HF/HCl) etching system with lithium chloride (LiCl) as an intercalation agent. This approach achieved remarkable exfoliation efficiency (up to 70 %) while endowing MXene with a wrinkled morphology and an expanded specific surface area. Subsequently, MXene/polyimide (MXene/PI) composite aerogels were fabricated by integrating MXene nanosheets into a PI flexible substrate, serving as pressure-sensitive materials. The composite aerogels exhibited a highly aligned lamellar microstructure, synergizing MXene’s conductivity with PI’s flexibility, thereby significantly improving both sensitivity and response range. At an optimal MXene content of 14 %, the sensor demonstrated exceptional performance: a wide response range (0–27.1 kPa) and a high sensitivity of 2.65 kPa −1 under a large applied stress of 27.1 kPa, surpassing existing counterparts. Further applications revealed the sensor’s capability in precisely detecting physiological signals (e.g, finger, wrist, and elbow movements). Additionally, the composite aerogel showcased multifunctionality, including superior thermal insulation (>90 % heat retention), efficient electromagnetic interference (EMI) shielding (45 dB at 10 GHz), and oil–water separation efficacy (>98 % for non-polar solvents). These findings highlight the material’s potential in wearable electronics, environmental remediation, and EMI shielding technologies, paving the way for next-generation multifunctional sensors.
研究领域:
材料科学
·
电子工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Small Methods
·
2023
·Vol. 7
·期 8
·2201526
·
IF 12.4
Yongqiu Xian,Bin Wang,Zifeng Lin
MXenes have been extensively explored as supercapacitor electrodes, especially in acidic aqueous electrolytes, where ultrahigh specific capacitance can be achieved; however, their narrow working potential window (≤ 1.0 V) limits the acquisition of high energy. Neutral and alkaline electrolytes can be used to extend the working potential window but MXenes in these electrolytes are less pseudocapacitive active, which leads to reduced charge storage. In this study, it is shown that Ti 3 C 2 T x MXene in a mild AlCl 3 aqueous electrolyte can operate at a wide potential range from 0 to −1.3 V versus Hg/Hg 2 SO 4 and retain high pseudocapacitive activity. Thus, a high capacity of up to 85 mAh g −1 is achieved, surpassing its performance in H 2 SO 4 electrolyte of 78 mAh g −1 . More interestingly, most of the capacity is released at a more negative potential range than that in acidic electrolytes, making it more suitable as a negative electrode material. In situ electrochemical quartz crystal microbalance results suggest that the high capacity originates from the pseudocapacitive intercalation/deintercalation of H + instead of Al 3+ , providing the possibility of coupling MXene anodes with proton redox active cathodes to achieve high-energy and high-power devices.
研究领域:
材料科学
·
储能技术
✓ 已验证
DOI
PubMed
高影响因子
CARBON
·
2020
·
IF 8.821
Fei Pan,Lunzhou Yu,Zhen Xiang,Zhicheng Liu,Baiwen Deng,Erbiao Cui,Zhong Shi,Xiang Li,Wei Lu
Although low-dimensional materials have already been studied as attractive electromagnetic wave absorption materials due to unique structure, it is still hard to acquire both ultrathin matching thickness and strong absorbing capability. Herein, multilayer-sandwiched Ti 3 C 2 T x MXene heterostructure decorated with one-dimensional Co nanochains has been synthesized successfully through a facile in situ process. As expected, the EM wave absorbers with ultrathin matching thickness and excellent absorbing capability are realized in the MXene composites. Compared with the MXene/Co nanoparticles , the MXene/Co nanochains composites achieved a minimum reflection loss of −46.48 dB with an ultrathin matching thickness of only 1.02 mm at 16.75 GHz. The intrinsic mechanism of the absorption revealed that the conductive loss, polarization loss, magnetic loss and interlacing magnetic flux field effect contributed to the high-performance microwave absorption. This work not only provided a unique direction for the designing and synthesizing of highly efficient EM wave absorbents with an ultrathin thickness, but also shed additional light on the understanding of the absorbing mechanism.
研究领域:
材料科学
·
电磁学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）