DIAMOND AND RELATED MATERIALS
·
2022
·
IF 3.806
Jiwei Xie,Guijing Liu,Jia Sun,Rundou Zheng,Wenwen Zhao,Tongtong Chu,He Lin,Yanbin Xu,Shanmin Gao,Zhuyin Sui
MnO 2 as the cathode material of Zinc-ion batteries (ZIBs) has attracted great attention. In order to further improve the performance of ZIBs, MnO 2 hollow nanorobs and carbon nanotubes (CNTs) are compounded to obtain α-MnO 2 /CNTs nanocomposites in which robs and tubes are entangled with each other and present the cross-linked reticular structure. This structure of α-MnO 2 /CNTs electrode is obtained through hydrothermal strategy and provides large space for the volume variation of MnO 2 during the charge and discharge process. The α-MnO 2 /CNTs composite displays an excellent initial discharge capacity of 302 mAh·g −1 at 100 mA·g −1 , and keeps 116 mAh·g −1 at 2000 mA·g −1 (78.4% retention after 2000 cycles). This composite provides a new way for the further application of ZIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 56
·期 2
·1386-1400
·
IF 3.553
Tong Zhe,Lu Hailin,Guo Feifei,Lei Wenxing,Dong Mochen,Dong Guangneng
The CNTs@Fe 3 O 4 hybrids were synthesized via a modified co-precipitation method and aligned along the through-thickness of carbon fabrics-reinforced epoxy composites (CFRPCs) by applying a weak magnetic field. The effects of the length, orientation and concentration of CNTs@Fe 3 O 4 on the mechanical and tribological properties of CFRPCs were investigated. The results showed that the modified co-precipitation method decreased the size of Fe 3 O 4 nanoparticles (approximately 10 nm in diameter), promoting the dispersion of CNTs@Fe 3 O 4 in epoxy resin. The alignment of CNTs@Fe 3 O 4 hybrids significantly increased the interlaminar shear strength (ILSS) and hardness of CFRPCs. The long CNTs@Fe 3 O 4 can more effectively improve the ILSS of CFRPCs compared to short CNTs@Fe 3 O 4 . Besides, the addition of aligned CNTs@Fe 3 O 4 hybrids significant improves the tribological properties of CFRPCs. Compared to long CNTs@Fe 3 O 4 -reinforced CFRPCs, the short CNTs@Fe 3 O 4 -reinforced CFRPCs show the best tribological properties. The properties anisotropy of CNTs@Fe 3 O 4 and high CNTs@Fe 3 O 4 concentration in near surface of CFRPCs are the main reason for the improvement in tribological properties of CFRPCs.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Zhenyuan Xu,Dongzhi Zhang,Zheng Li,Chen Du,Yan Yang,Bao Zhang,Wenhao Zhao
Flexible wearable sensors to monitor human movement and for electronic skins must exhibit high sensitivity, a wide detection range, and waterproof characteristics. This work reports a flexible, highly sensitive, and waterproof sponge pressure sensor (SMCM). The sensor is made by assembling SiO2 (S), MXene (M), and NH2-CNTs (C) on the backbone of melamine sponge (M). The SMCM sensor exhibits excellent sensitivity (10.8 kPa–1), an ultra-short response/recovery time (40 ms/60 ms), a wide detection range (30 kPa), and an extremely low detection limit (4.6 Pa). Benefiting from layer-by-layer self-assembly, the sensor still exhibits excellent stability after 5000 cycles. In addition, the SMCM sensor also has excellent waterproof performance (a water contact angle of 142°), enabling it to operate unaffectedly under wet conditions. The SMCM sensor can accurately detect small body movements such as pulse and swallowing while also accurately detecting finger and elbow movements. In addition, the sensor can be designed as an array to construct an electronic skin for detecting the magnitude and distribution of external pressure. This work holds great application potential in next-generation electronic skin, fitness detection, and flexible pressure sensors.
研究领域:
材料科学
·
生物医学工程
·
传感器技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nanoscale Research Letters
·
2020
·Vol. 15
·期 1
·1-10
·
IF 3.578
Yue Gentian,Cheng Renzhi,Gao Xueman,Fan Leqing,Mao Yangfan,Gao Yueyue,Tan Furui
A ternary and composite MoIn 2 S 4 @CNTs counter electrode (CE) with a hedgehog ball structure was synthesized by using a facile one-step hydrothermal method. The composite MoIn 2 S 4 @CNTs film possesses large specific surface area through N 2 adsorption-desorption isotherms test, which is advantageous to adsorb more electrolyte and provide larger active contact area for the electrode. In addition, the composite MoIn 2 S 4 @CNTs CE exhibits low charge transfer resistance and fine electrocatalytic ability made from a series of electrochemical tests including cyclic voltammetry, electrochemical impedance, and Tafel curves. Under optimal conditions, the DSSC based on the MoIn 2 S 4 @CNTs-2 composite CE achieves an impressive power conversion efficiency as high as 8.38%, which remarkably exceeds that of the DSSCs with the MoIn 2 S 4 CE (7.44%) and the Pt electrode (8.01%). The current work provides a simplified preparation process for the DSSCs.
研究领域:
材料科学
·
能源技术
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Yongjie Huang,Yuqing Chen,Qing Xu,Chunyan Xu,Liying Yang,Ningyi Jiang,Jibin Zhong,Xinghan Zhao,Shougen Yin
Lithium‑sulfur (Li S) batteries are regarded as a potential candidate of next-generation energy storage devices. However, the poor long-term cycling performance arose from shuttle effect remains a challenge. The recent studies have shown that two dimensional (2D) MXenes have great potential in high efficient Li S cells due to strong adsorption ability for lithium polysulfides (LiPSs) and effective catalytic activity for rapid kinetics. Herein, a polypropylene separator modified by a three-dimensional (3D) TiO 2 -Ti 3 C 2 T x MXene@CNTs heterostructure using sulfur templates combined with H 2 O 2 partial oxidation treatment is proposed to alleviate the shuttle effect and improve the overall utilization efficiency of sulfur in Li S batteries. The as-prepared separator effectively enhances the LiPSs trapping ability and significantly reduces the oxidation overpotential of Li 2 S, demonstrating high catalytic efficiency and sufficient conductivity to promote the transformation of LiPS to Li 2 S and thus accelerating the transformation kinetics of Li S batteries. Remarkably, the TiO 2 -MX@CNTs modified separator with 1.3 mg cm −2 sulfur loading enables a stable capacity of 859 mAh g −1 after 300 cycles at 1C with a capacity decay rate of approximately 0.035 % per cycle, suggesting promising potential for practical applications. This work presents a new method to regulate the electrochemical performance of Li S batteries.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2018
·
IF 4.229
Meijia Liu,Xuezhang Xiao,Shuchun Zhao,Sina Saremi-Yarahmadi,Man Chen,Jiaguang Zheng,Shouquan Li,Lixin Chen
Transition-metal nanoparticles (NPs) can catalytically improve the hydrogen desorption/absorption kinetics of MgH 2 , yet this catalysis could be enhanced further by supporting NPs on carbon-based matrix materials . In this work, Co NPs with a uniform size of 10 nm loaded on carbon nanotubes (Co@CNTs) were synthesized in situ by carbonizing zeolitic imidazolate framework-67 (ZIF-67). The novel Co@CNTs nanocatalyst was subsequently doped into MgH 2 to remarkably improve its hydrogen storage properties. The MgH 2 -Co@CNTs starts to obviously release hydrogen at 267.8 °C, displaying complete release of hydrogen at the capacity of 6.89 wt% at 300 °C within 15 min. For absorption, the MgH 2 -Co@CNTs uptakes 6.15 wt% H 2 at 250 °C within 2 min. Moreover, both improved hydrogen capacity and enhanced reaction kinetics of MgH 2 -Co@CNTs can be well preserved during the 10 cycles, which confirms the excellent cycling hydrogen storage performances. Based on XRD , TEM and EDS results, the catalytic mechanism of MgH 2 -Co@CNTs can be ascribed to the synergetic effects of reversible phase transformation of Mg 2 Co to Mg 2 CoH 5 , and physical transformation of CNTs to carbon pieces. It is demonstrated that phase transformation of Mg 2 Co/Mg 2 CoH 5 can act as “hydrogen gateway” to catalytically accelerate the de/rehydrogenation kinetics of MgH 2 . Meanwhile, the carbon pieces coated on the surfaces of MgH 2 particles not only offer diffusion channels for hydrogen atoms but also prevent aggregation of MgH 2 NPs, resulting in the fast reaction rate and excellent cycling hydrogen storage properties of MgH 2 -Co@CNTs system.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 5
·057511
·
IF 4.316
Xin-Qin Cai,Kai Zhu,Bo-Tao Liu,Qing-Yu Zhang,Yu-Hui Luo,Dong-En Zhang
In this work, γ-Fe2O3/CNTs composite was facile synthesized by simple hydrothermal method and hydrazine hydrate treatment at low temperature (CNTs = carbon nanotubes). The result of VSM shows that the saturation magnetization of Fe2O3/CNTs composites increase from 0 to 1.29 emu g−1 after hydrazine hydrate treatment, indicating that the Fe2O3 in the composite transforms from α phase to γ phase. Moreover, the electrochemical properties of both α-Fe2O3/CNTs and γ-Fe2O3/CNTs was studied. Compared with α-Fe2O3/CNTs, γ-Fe2O3/CNTs shows enhanced electrochemical performance toward paracetamol determination. Under optimum condition, the γ-Fe2O3/CNTs modified electrode exhibits two linear ranges of 2.5 μM−385 μM and 593 μM−1550 μM and a low detection limit of 0.046 μM. In addition, the constructed sensor can be successfully utilized for detecting paracetamol in different water bodies. This work provides a new clue for the design and construction of excellent electrochemical sensor for paracetamol determination.
研究领域:
材料科学
·
分析化学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2019
·
IF 5.155
Nan Zhou,Yufan Wu,Yiran Li,Jiankui Yang,Qing Zhou,Yuwei Guo,Mao Xia,Zhi Zhou
As an anode with ultrahigh capacity (4200 mAh g −1 ), silicon (Si) has inherent defects, such as drastic volume change (~300%) and poor conductivity. To cope with these problems, constructing a rigid shell (e.g. TiO 2 ) on the surface of Si particles is an effective method. Typically, monoclinic titanium dioxide (TiO 2 -B) has the more excellent electrochemical performance among the various crystalline of TiO 2 (anatase, rutile, etc.) for its open channel and characteristic pseudocapacitive effect. In addition, carbon nanotubes (CNTs) are good conductor of electricity. It is hopeful to increase the conductivity of the Si anode by adding CNTs . In this work, therefore, a Si@TiO 2 -B/CNTs composite is prepared by hydrothermal method. The composite exhibits superior electrochemical properties during the half-cell test (1184 mAh g −1 under 0.1 A g −1 at 200th cycles). Furthermore, the electrochemical kinetics of the materials were studied by cyclic voltammetry, which demonstrated that coating TiO 2 -B could increase the capacitive effects of the composite (68.75%).
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Hao Wu,Xiaohu Ren,Wanxin Hu,Yun Tang,Hongfeng Yin,Huiqing Fan,Hudie Yuan,Chao Wang,Yalou Xin
Polymer-based aerogels have proven to be a promising choice to obtain high-performance and lightweight materials for electromagnetic microwave (EMW) absorption. Here, directional freeze-drying was used to produce multifunctional ultralight CNTs/PI composite aerogels with oriented microchannel structures. The unique oriented pore structure causes the multiple reflections and scattering of incident EMW inside the material, which favors the attenuation of the EM energy. By changing the CNTs content in the composite aerogels, the dipole polarization and the interface polarization can be effectively regulated. With a CNTs content of 30 % and a thickness of 2.5 mm, the minimum reflection loss (RL min ) of −41 dB was achieved at 15.36 GHz. A large effective absorption bandwidth (EAB) of 6.88 GHz was achieved at a thickness of 3 mm. In addition, the CNTs/PI composite aerogels displayed excellent toughness, thermal isolation and the thermal stability. The high-temperature resistant, lightweight composite aerogels proposed in this study could provide a feasible and effective approach for the development of advanced multifunctional microwave-absorbing materials.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Pei Yang,Shuang Wang,Huihui Liu,Linghui Meng,Yongping Bai,Jinmei He
The development of multifunctional Metastable intermixed composites (MICs) is a highly coveted objective in this field. Inspired by trees, its excellent ability to grasp soil plays an important role in energy conversion. Here, leaf-like PVDF/Al@CNTs (PDC) colloids with an energy conduction network of CNTs were prepared by strong shearing and precipitation in poor solvent. This trinity system achieved synchronous super-hydrophobicity, high safety, and excellent combustion performance. The synergistic effect of CNTs, micro-clusters of PDC and β-PVDF greatly increased the water contact angle (WAC) of the samples, achieving a WAC of 140° when CNTs were added at 3 wt%. The high conductivity and unique CNTs network enable PDC's security and electromagnetic shielding of PDC. Importantly, the sensitivity of the laser ignition and the ignition delay time were tuned. The reaction process of PDC was characterized by DSC-TG-MS, and the main reaction temperature decreases with the addition of CNTs. Moreover, PDC-1 exhibits the highest ignition pressure, energy release, and combustion rate. The combustion process is characterized by simplified simulations, which verify the important role of the unique network of CNTs in PDC for energy conduction during combustion. This work presents a distinctive approach for multifunctional MICs, demonstrating encouraging potential for various applications in energetic materials.
研究领域:
材料科学
·
能源工程
·
表面科学
✓ 已验证
产品关联
DOI
高影响因子
Catalysts
·
2022
·Vol. 12
·期 12
·1508
·
IF 4.501
Jinhua Sun,Yuanhui Zuo,Hanyun Wang,Huancong Shi,Shijian Lu
The three-dimensional (3D) nanoreactor of global-local CNTs conductive network coupled with bimetallic MOFs-derived Co@N-C nanopolyhedra (denoted as gl-CNTs/Co@N-C) promotes the electrocatalytic reduction of oxygen owing to the improved mass transfer ability and stability. Here, the 1D/3D gl-CNTs/Co@N-C nanostructures with enhanced electrocatalytic properties were synthesized in one step by the direct thermolysis of Zn/Co-ZIF/MWCNTs precursor. Based on systematical optimization of the composition and structure, gl-CNTs/Co@N-C carbonaceous porous hybrids containing uniform Co nanoparticles (NPs) can not only effectively enable the conductivity but also expose more active sites. Consequently, the optimal gl-CNTs/Co@N-C nanostructure showed a significantly enhanced catalytic activity for the reduction of oxygen, the half-wave potential (E1/2) and diffusion-limited current density are 0.86 V (vs. RHE) and 5.34 mA cm−2, respectively. Moreover, this catalyst also showed long-term durability and methanol tolerance property, further highlighting the structure superiority of a precisely controllable nanoreactor.Keywords:global-local CNTs;conductive network;carbon-based catalysts;oxygen reduction reaction;methanol tolerance
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Wuxiang Zhang,Zihan Li,Rui Luo,Qingyong Guo,Fang Xu,Fu Yang,Ming Zhang,Lu Jia,Saisai Yuan
The increasingly complex situation of the water environment has put forward higher requirements for the development of functional materials for comprehensive water environmental management. Here, a facile microwave self-assembly strategy was proposed to construct a tandem copper oxide/carbon nanotube (CuO/CNTs) composite. The characterization of the structure shows that the CNTs have been associated with porous CuO nanospheres , forming an interpenetrating architecture. We identified generated reactive oxygen species including sulfate radicals (SO 4 − ), hydroxyl radicals ( OH), singlet oxygen ( 1 O 2 ), and superoxide radical (O 2 − ), which can rapidly improve the degradation of tetracycline (TC). Compared with individual CuO microspheres or CNTs, the reaction rate of TC on the CuO/CNTs is improved 1.9 and 6.5 times, respectively. In addition, we confirmed that the reactive oxygen species produced had an effectively inhibitory effect on common types of bacteria. Density functional theoretical (DFT) calculations show that the adsorption energy of PMS on the opposite side of graphene is favorable (−0.517 eV). The CuO/CNTs catalysts with excellent intrinsic properties suggest its wide potential applications in wastewater treatment .
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 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）