Nano-Micro Letters
·
2020
·Vol. 12
·期 1
·1-15
·
IF 12.264
Liu Siyang,Hu Fangyuan,Shao Wenlong,Zhang Wenshu,Zhang Tianpeng,Song Ce,Yao Man,Huang Hao,Jian Xigao
2D MXenes are attractive for energy storage applications because of their high electronic conductivity. However, it is still highly challenging for improving the sluggish sodium (Na)-ion transport kinetics within the MXenes interlayers. Herein, a novel nitrogen-doped Ti 3 C 2 T x MXene was synthesized by introducing the in situ polymeric sodium dicyanamide (Na-dca) to tune the complex terminations and then utilized as intercalation-type pseudocapacitive anode of Na-ion capacitors (NICs). The Na-dca can intercalate into the interlayers of Ti 3 C 2 T x nanosheets and simultaneously form sodium tricyanomelaminate (Na 3 TCM) by the catalyst-free trimerization. The as-prepared Ti 3 C 2 T x /Na 3 TCM exhibits a high N-doping of 5.6 at.% in the form of strong Ti–N bonding and stabilized triazine ring structure. Consequently, coupling Ti 3 C 2 T x /Na 3 TCM anode with different mass of activated carbon cathodes, the asymmetric MXene//carbon NICs are assembled. It is able to deliver high energy density (97.6 Wh kg −1 ), high power output (16.5 kW kg −1 ), and excellent cycling stability (≈ 82.6% capacitance retention after 8000 cycles).
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
·
2023
·
IF 8.7
Jingjiang Wei,Yunfei Yang,Fei Pan,Kun Yang,Yanqing Wang,Zhihui Zeng,Qingyuan Wang,Zhengyi Fu
Developing multifunctional hydrogels with high strength, toughness, and conductivity is critical for various applications in soft robots, wearable devices, and human–computer interfaces. Inspired by the Hofmeister effect, a type of composite hydrogels was prepared using a freezing and salting-out approach, which combines transition metal carbide/nitride (MXene) and polyvinyl alcohol (PVA). The hydrogels exhibited great mechanical strength and toughness, and high conductivity, conferring its application as a multifunctional strain sensor. In addition, the synergy of highly conductive MXene , water-enriched porous structure, and sufficient MXene-PVA interfaces contributes to the controllable and high electromagnetic interference shielding effectiveness of 43–93 dB at thickness of 1.5–8.5 mm. Combined with the facile and scalable preparation approach for rational design of the MXene, PVA, water, and porous structure in the hydrogels, this work thus demonstrates the robust, ultra-flexible and electrically conductive multifunctional hydrogels for applications in Internet of Things, next-generation wearable electronics, electromagnetic protection, and smart devices.
研究领域:
材料科学
·
软体机器人
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可穿戴设备
·
电子工程
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2022
·
IF 9.417
Jinhua Xiong,Haowen Zheng,Renjie Ding,Pengyang Li,Zonglin Liu,Xu Zhao,Fuhua Xue,Zhong Chen,Qian Yan,Qingyu Peng,Xiaodong He
MXene-based fibers are expected to have the hopeful potential for manufacturing multifunctional fabrics with permeability, lightweight, remarkable electrical conductivity, and outstanding mechanical properties. However, the weak interaction between fibers limits the performance of the fabrics, and researchers are still seeking a suitable solution and easily scalable production methods. Here a green and novel wet-assembly approach is proposed for producing non-woven MXene fiber fabrics (MFFs) constructed by random-oriented and well-connected interfused MXene fibers. The as-prepared fabrics are porous and lightweight while exhibiting high electrical conductivity (708 S cm −1 ). A maximum specific electrical conductivity is achieved with a relatively low density (0.24 g cm −3 ), even superior to individual MXene fibers. Moreover, the MFFs exhibit outstanding electromagnetic interference (EMI) shielding effectiveness of 75.0 dB at a thickness of 107 μm, exceptional Joule heating (up to 370 °C at a voltage of 3.5 V), and excellent photothermal conversion abilities, showing their great potential as high-performance and multifunctional fabrics in EMI shielding, wearable intelligent garments, and personal heating applications.
研究领域:
材料科学
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纺织工程
·
电子材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Dinghao Zhang,Lijuan Dong,Mengwei Dong,Xingye Yao,Shaozhou Li,Hengchang Bi,Xiao Huang,Jian Zhang
Boron nanosheets with high surface hydrophilicity and proton conductivity are promising for ionic devices. However, their poor electrical conductivity has severely limited their applications in resistive-type electronic devices. Herein, electrically conductive three-dimensional boron/MXene hollow spheres were prepared by a freeze-drying-assisted self-assembly method. The composites were fabricated into resistive-type humidity sensors, which showed high sensitivity with a three-orders-of-magnitude variation in resistance, a wide detection range (11–97%), fast response and recovery time (4 s/3.8 s), and long-term stability. The excellent humidity sensing performance can be attributed to the abundant hydrophilic groups on both the inner and outer surfaces of open spheres as well as to a coupled hole/proton conducting process. As a proof of concept, real-time remote monitoring of human respiration was achieved by integrating our humidity sensor with a Bluetooth module, enabling differentiation of breathing frequency as rapid as 0.8 s.
研究领域:
材料科学
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电子工程
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Zhi Wan,Peilin Zuo,Zhiyuan Chen,Jizhou Yang,Mingxin Ren,Zhenghang Tian,Gangfeng Li,Peng Hu,Feng Teng,Haibo Fan
Ti 3 C 2 T x MXenes have emerged as promising candidates for energy storage applications due to their two-dimensional structure, metallic conductivity, tunable surface functionalities, and intrinsic pseudocapacitive charge storage. This study explores the hydrothermal synthesis of GaOOH/Ti 3 C 2 T x composites using gallium nitrate as the gallium precursor. The incorporation of GaOOH not only expands the interlayer spacing of Ti 3 C 2 T x , facilitating more efficient electrolyte ion migration, but also enhances the material's energy storage capacity by introducing additional active sites and augmenting pseudocapacitance. As an electrode material in supercapacitors, GaOOH/Ti 3 C 2 T x composites, prepared with a 0.06 M gallium source concentration, achieve a remarkable specific capacitance of 542.1 F·g −1 , surpassing that of pristine Ti 3 C 2 T x (305 F·g −1 ), with a minimal degradation of only 3.4 % after 5000 charge-discharge cycles. This research offers valuable insights into the electrochemical behavior of GaOOH/Ti 3 C 2 T x composites and highlights the role of GaOOH in enhancing the performance of these materials. The results underscore the potential of combining metal hydroxides with MXenes for advanced supercapacitor applications.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Nano
·
2021
·
IF 15.881
Xinliang Li,Na Li,Zhaodong Huang,Ze Chen,Yuwei Zhao,Guojin Liang,Qi Yang,Mian Li,Qing Huang,Binbin Dong,Jun Fan,Chunyi Zhi
With fluidity and dangerous corrosiveness, liquid insulating bromine elemental (Br2) can hardly be confined by traditional conductive carriers (mainly carbon materials) for efficient redox without shuttle behavior. Thus, stationary Br2-based energy storage devices are rarely advanced. Here, we introduce an electrochemical active parasite Br2 to the Ti3C2TXMXene host and construct an advanced aqueous zinc redox battery via a facile electrodeposition process (Br-Ti3C2TX). Both ex situ experimental characterizations and density functional theory (DFT) simulations have validated the natural affinity between MXenes and Br species, which is manifested as their spontaneous fixation accompanied by rapid transfer of electrons in the interface region and interlayer confinement. Consequently, the battery delivers a high-voltage plateau at 1.75 V that contributes to an improved energy density of 259 Wh kg–1Br (144 Wh kg–1Br-Ti3C2TX), exhibiting efficient output capability in the high-voltage region. Besides, benefiting from enhanced redox kinetics, the capacity achieved at −15 °C approaches to 69% of the value at room temperature. More importantly, an excellent 10 000 cycles at −15 °C with negligible capacity decay is identified. The paradigm represents a step forward for developing stationary aqueous metal-Br2 batteries.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2018
·Vol. 7
·期 3
·474-478
·
IF 5.976
Renji Bian,Gaoling He,Weiqiang Zhi,Shanglin Xiang,Tingwei Wang,Dongyu Cai
This work for the first time reports a freeze-casting route for fabricating an ultralight MXene aerogel (ρ < 10 mg cm−3) without using external supporters. It shows that this route is scalable for producing MXene aerogels with large sizes. These aerogels contain micro-sized pores determined by the morphology of ice crystals and demonstrate strong absorption ability for various organic solvents. More strikingly, they show excellent EMI shielding performance (up to 75 dB) with extremely low reflection (<1 dB). This gives rise to a specific shielding effectiveness of 9904 dB cm3 g−1 owing to the ultralow density of the aerogels.
研究领域:
材料科学
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电磁学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 55
·期 3
·1148-1156
·
IF 3.442
Chen He,Yu Lanyong,Lin Zifeng,Zhu Qizhen,Zhang Peng,Qiao Ning,Xu Bin
MXenes are 2D transition metal carbides or nitrides with high electrical conductivity that have attracted great attention as promising electrode materials that supersede carbon-based material designed for supercapacitors. However, the aggregation and self-restacking of MXene 2D nanosheets limit their high-rate performance. In this work, flexible and conductive Ti 3 C 2 T x MXene/carbon nanotubes (CNTs) composite film was prepared through a simple vacuum filtration of the Ti 3 C 2 T x MXene and CNTs suspension mixture. The CNTs integrated MXene nanosheets can effectively prevent the restacking while creating fast ion transport channels for enhanced capacitance. The designed films exhibit excellent performance as supercapacitor electrodes with high capacitance of 300 F g −1 at 1 A g −1 with superior rate performance of 199 F g −1 even at 500 A g −1 , together with excellent cyclic stability of 92% capacitance retention after 10000 cycles at 20 A g −1 . The excellent workability demonstrates potential application of the system for flexible, portable and highly integrated supercapacitors.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2021
·
IF 4.837
Chenya Ruan,Dongdong Zhu,Jiqiu Qi,Qingkun Meng,Fuxiang Wei,Yaojian Ren,Yanwei Sui,Hao Zhang
Bimetallic transition metal sulfides (TMSs) and MXene are the two kinds of promising candidates as electrode materials for supercapacitors based on different storage mechanisms. However, little work has been performed on their composites. In this paper, Ti 3 C 2 MXene-wrapped CoNi 2 S 4 nanotrees were synthesized controllably using flake ZIF-67 as precursor grown on nickel foam, which was transformed into dendrite CoNi 2 S 4 dendrite in MXene suspension (weak acidic environment). The formation mechanism of CoNi 2 S 4 dendrite was discussed. Ti 3 C 2 MXene-wrapped CoNi 2 S 4 nanotrees delivered very high specific capacity of 933 C g −1 at 1 A g −1 and good rate performance. This is due to that the unique dendrite morphology can provide many exposed electro-active sites and wrapped conductive MXene can facilitate the charge transfer. An asymmetric supercapacitor was assembled using CoNi 2 S 4 /MXene/NF and RGO as positive and negative electrodes, which delivered a high energy density of 30.5 Wh kg −1 without deteriorating its high power density (1587 W kg −1 ). This device can power the clock for 55 minutes, demonstrating its broad practical application potential.
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
AICHE JOURNAL
·
2023
·Vol. 69
·期 8
·e18105
·
IF 3.7
Mide Luo,Zong Lu,Yali Zhao,Yufei Wang,Yanying Wei,Haihui Wang
Accurately constructing membranes based on two-dimensional (2D) materials on commercial porous substrates remains a significant challenge for H 2 purification. In this work, a series of tubular 2D MXene membranes are prepared on commercial porous stainless steel substrates via fast electrophoretic deposition. Compared with other methods, such as filtration or drop coating, and so on. such preparation route shows the advantages of simple operation, high efficiency for membrane assembly (within 5 min) with attractive reproducibility, and ease for scale-up. The tubular MXene membranes present excellent gas separation performance with hydrogen permeance of 1290 GPU and H 2 /CO 2 selectivity of 55. Furthermore, the membrane displays extremely stable performance during the long-term test for more than 1250 h, and about 93% of the membranes from one batch have exceeded the DOE target for CO 2 capture. Most importantly, this work provides valuable referential significance for other 2D materials-based membranes for future application development.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
International Journal of Environmental Research and Public Health
·
2019
·Vol. 16
·期 23
·4659
·
IF 2.468
Zhen Shen,Wei Chen,Hang Xu,Wen Yang,Qing Kong,Ao Wang,Mingmei Ding,Juan Shang
Membrane fouling is still a critical issue for the application of ultrafiltration, which has been widely used in water treatment due to its efficiency and simplicity. In order to improve the antifouling property, a new 2D material MXene was used to fabricate composite ultrafiltration membrane with the approach of in situ embedment during the phase inversion process in this study. Scanning electron microscopy (SEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), energy dispersive spectroscopy (EDS), Fourier transform infrared spectroscopy (FTIR), water contact angle, bovine serum albumin rejection and porosity measurements were utilized to characterize the prepared membranes. Due to the hydrophilicity of the MXene, the composite membranes obtained higher hydrophilicity, confirmed by the decreased water contact angle. All the modified membranes had a high bovine serum albumin rejection above 90% while that of the pristine polysulfone membrane was 77.48%. The flux recovery ratio and the reversible fouling ratio of the membranes were also improved along with the increasing content of the MXene. Furthermore, the highest flux recovery ratio could also reach 76.1%. These indicated the good antifouling properties of MXene composite membranes. The enhanced water permeability and protein rejection and excellent antifouling properties make MXene a promising material for antifouling membrane modification.Keywords:MXene (Ti3C2Tx);polysulfone;hydrophilicity;ultrafiltration membrane;antifouling
研究领域:
材料科学
·
环境工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CARBOHYDRATE POLYMERS
·
2024
·
IF 10.7
Zhengguo Wu,Shanshan Li,Xiaoqian Qin,Lu Zheng,Jiawei Fang,Lansheng Wei,Changliang Xu,Zhong Alan Li,Xiaoying Wang
The development of highly effective chitosan-based hemostatic materials that can be utilized for deep wound hemostasis remains a considerable challenge. In this study, a hemostatic antibacterial chitosan/N-hydroxyethyl acrylamide (NHEMAA)/Ti 3 C 2 T x (CSNT) composite cryogel was facilely prepared through the physical interactions between the three components and the spontaneous condensation of NHEMAA. Because of the formation of strong crosslinked network, the CSNT cryogel showed a developed pore structure (~ 99.07 %) and superfast water/blood-triggered shape recovery, enabling it to fill the wound after contacting the blood. Its capillary effect, amino groups, negative charges, and affinity with lipid collectively induced rapid hemostasis, which was confirmed by in vitro and in vivo analysis. In addition, CSNT cryogel showed excellent photothermal antibacterial activities, high biosafety, and in vivo wound healing ability. Furthermore, the presence of chitosan effectively prevented the oxidation of MXene, thus enabling the long-term storage of the MXene-reinforced cryogel. Thus, our hemostatic cryogel demonstrates promising potential for clinical application and commercialization, as it combines high resilience, rapid hemostasis, efficient sterilization, long-term storage, and easy mass production.
研究领域:
生物医学材料
·
组织工程
·
再生医学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）