Nano Energy
·
2019
·
IF 15.548
Shidong Song,Wanjun Li,Ya-Ping Deng,Yanli Ruan,Yining Zhang,Xuhui Qin,Zhongwei Chen
Zn-air batteries (ZABs) represent promising candidates for the next generation energy conversion and storage systems based on their superior features to those of lithium-ion batteries, including high theoretical energy density , low cost, and high safety. However, their further development and application is severely lagged due to the lack of high efficient and durable bifunctional oxygen electrocatalysts . The widely applied carbon-based catalysts are thermodynamically instable during battery charging. Herein, TiC supported amorphous MnO x (a-MnO x /TiC) is reported for the first time as electrocatalyst for the corrosion resistant oxygen electrodes of ZABs. A-MnO x /TiC delivers a remarkable activity and stability toward both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) with a high half-wave potential (0.8 V) for ORR and a low potential (1.56 V) at 10 mA cm −2 for OER, which far outperforms the state of the art ORR catalyst (Pt/C) and OER catalyst (IrO 2 ), as well as the Pt/C-IrO 2 and a-MnO x /C bifunctional catalysts . The excellent bifunctional activity of a-MnO x /TiC can be attributed to the efficient synergistic effect between the active amorphous MnO x catalyst and the highly conductive and stable TiC support. More impressively, a-MnO x /TiC demonstrates an outstanding electrochemical stability in strong alkaline electrolyte under OER condition in contrast to the readily oxidized carbon-based a-MnO x /C catalysts. ZAB with a-MnO x /TiC delivers a greater discharge performance with a peak power density of 217.1 mW cm −2 than that of Pt/C-based ZAB, and a surpassing discharge and charge cycling performance and stability to ZABs with Pt/C-IrO 2 and a-MnO x /C. Furthermore, a-MnO x /TiC can be applied for solid-state ZABs which exhibit excellent mechanical flexibility and cycle stability under their flat and bent states. The a-MnO x /TiC bifunctional electrocatalyst with extraordinarily high activity and electrochemical stability provides a promising approach for exploring corrosion resistant electrocatalysts for Zn-air batteries with high efficiency and long-term cycling stability.
研究领域:
电化学
·
能源存储与转换
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2025
·
IF 20.2
Guilin Feng,Xiaohong Liu,Chunliu Xu,Rongman Sun,Jingye Wang,Xu Yang,Yongbin Wang,Zihan Wang,Yanxiao Chen,Weiqing Yang
Fast-charging sodium-ion batteries with high energy density require hard carbons anodes that combine high low-voltage plateau capacity and rapid Na + kinetics. However, simultaneously achieving these properties remains a critical challenging. Here, we utilize MXene as a structural modulator to create the closed-pore structure of hard carbons, enhancing Na storage while constructing TiC/C heterojunctions to accelerate Na + transport. Unlike pure glucose-derived carbon, the MXene/TiC-embedded precursor induces curved graphite lattices and a moderately increased graphitization degree during carbonization, promoting formation of closed pores for dense sodium cluster storage. The resulting glucose/MXene-derived hard carbons (GM-HCs) exhibits a high reversible capacity of 381.4 mAh g -1 at 0.1C. Moreover, GM-HCs demonstrate remarkable low-voltage plateau capacity at high rate, retaining 124.9 mAh g -1 at 20C. Density functional theory (DFT) calculations confirm reduced Na + diffusion barriers and enhanced electronic conductivity in hard carbons with TiC/C heterojunctions. When paired with a Na 3 V 2 O 2 (PO 4 ) 2 F cathode, GM-HCs-based full cells deliver high energy density and stable cycling, retaining 95.2 % capacity after 400 cycles. This work presents a dual strategy by creation of closed pores and construction of heterojunctions to simultaneously enhance plateau capacity and Na + migration, advancing the development of high-performance sodium-ion battery anodes.
研究领域:
储能
·
材料科学
·
电化学
·
纳米技术
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2019
·
IF 3.355
Lixin Song,Tianwei Wang,Wanru Jing,Xueyao Xie,Pingfan Du,Jie Xiong
Power source is a core component of wearable electronic device. To obtain a suitable power source, the highly flexible MoS 2 /TiC/C nanofibrous (NFs) film was prepared and employed as the Pt-free and transparent conductive oxide (TCO)-free counter electrode (CE) of flexible dye-sensitized solar cell (FDSSC). Then the FDSSC was combined with a fabric to form a photovoltaic textile. Notably, there was no substrate of CE in the device due to the desired mechanical property of the MoS 2 /TiC/C NFs film. The obtained FDSSC based photovoltaic textile possessed power conversion efficiency of 5.08%, which was larger than that of Pt based device. The main reasons may be the large BET surface area and promising electrocatalytic activity of the MoS 2 /TiC/C CE. Besides, the combination of FDSSC with fabric was extremely easy and simple. Hence, the photovoltaic textile exhibited huge potential applications in smart textile for wearable electronic devices.
研究领域:
材料科学
·
纳米能源
·
柔性电子学
·
光电转换
·
智能纺织品
·
电化学
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2024
·Vol. 14
·期 20
·1629
·
IF 4.4
Penghui Lei,Qing Chang,Mingkun Xiao,Chao Ye,Pan Qi,Fangjie Shi,Yuhua Hang,Qianwu Li,Qing Peng
A new type of SiCf/TiC-Ti3SiC2composite was prepared by the Spark Plasma Sintering (SPS) method in this work. The phase transformation and interface cracking of this composite under ion irradiation (single Xe, Xe + He, and Xe + He + H ions) and subsequent annealing were analyzed using transmission electron microscopy (TEM), mainly focusing on the interface regions. Xe ion irradiation resulted in the formation of high-density stacking faults in the TiC coatings and the complete amorphization of SiC fibers. The implanted H ions exacerbated interface coarsening. After annealing at 900 °C for 2 h, the interface in the Xe + He + H ion-irradiated samples was seriously damaged, resulting in the formation of large bubbles and cracks. This damage occurred because the H atoms reduced the surface free energy, thereby promoting the nucleation and growth of bubbles. Due to the absorption effect of the SiCf/TiC interface on defects, the SiC fiber areas near the interface recovered back to the initial nano-polycrystalline structure after annealing.
研究领域:
材料科学
·
核材料
·
复合材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Xinxi Li,Long Liu,Baoping Liu,Hanjiang Li,Wen Luo,Guoqing Zhang,Xiaofeng Zhang,Changhong Wang
Silicon holds bright promise as the anode material for next-generation lithium-ion batteries (LIBs). Unfortunately, it is limited by enormous volume expansion and fast capacity fading in long-cycling or large current density. Here, we propose an in-situ assembling path to form a stable Si nanocomposite by introducing bicontinuous TiO 2 -C layer and graphene nano-sheets, and further enhance the stability for long-term LIBs. The enhanced synergistic coupling of graphene and bicontinuous TiO 2 -C layer and introduced Ti C bond effectively improve long-cycling structural stability of Si nanocomposite for promising LIBs anode material. This anode material exhibits high capacity, long-term cycling and high-rate performance. Especially, it showed the high reversible capacities of 2147.6 mA h g −1 at 0.5 A g −1 after 800 cycles and 1328.2 mA h g −1 at 2 A g −1 after 500 cycles, which is much better than that of TiO 2 -C@Si and nano Si anodes. Moreover, the full cell including this composite anode and commercial LiFePO4 cathode exhibits a high capacity retention after 100 cycles. Our work demonstrates that this surface functionalization strategy can enhance synergistic coupling and introduce Ti C bond to regulate the stability of Si nanocomposite as long-cycling LIBs anode.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
SURFACE & COATINGS TECHNOLOGY
·
2020
·
IF 3.784
Xia Zhao,Zanling Huang,Wanying Zhang,Yuting Ke,Fushen Lu,Rongsheng Chen,Kaifu Huo,Liangsheng Hu,Paul K. Chu
Core-shell titanium carbide/carbon (TiC@C) and titanium carbide/nitrogen-doped carbon (TiC@CNx) quasi-aligned nanofiber arrays (NFAs) are fabricated on biomedical Ti-6Al-4V by a simple thermal chemical process in the presence of benzene and pyridine at 800 °C, respectively. The morphology, structure, and composition of the TiC@C and TiC@CNx NFAs are characterized by X-ray diffraction, electron microscopy , energy-dispersive X-ray spectrometry, and Raman scattering spectroscopy. The TiC@C and TiC@CNx nanofibers consisting of highly conducting single-crystalline TiC cores and carbon shells or N-doped carbon shells have a large amount of defects and N doping endows the TiC@CNx NFAs with excellent electrochemical properties . The TiC@CNx NFAs electrode exhibits fast heterogeneous electron transfer (HET) kinetics in the Fe(CN) 6 3−/4− redox couple showing an ideal peak-to-peak potential separation (59 mV) at a high scan rate of 7000 mV s −1 . As a result, the TiC@CNx NFAs electrode has high activity in the simultaneous detection of dopamine (DA), ascorbic acid (AA), uric acid (UA), and serotonin (5-hydroxytryptamine, 5-HT) as well as high sensitivity and selectivity in the determination of DA in the presence of UA, AA, and 5-HT. The linear range for the determination of DA is 0.5–180 μM and detection limit is 8 nM (S/N = 3).
研究领域:
材料科学
·
电化学
·
纳米技术
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE CERAMIC SOCIETY OF JAPAN
·
2026
·Vol. 134
·期 1
·10-17
·
IF 1.1
Zhao Huang,Xiaomeng Li,Haotian Yang,Zhaoxuan Yan,Bo Chen
Diamond-reinforced silicon carbide (Diamond/SiC) composites, with their exceptional thermal conductivity and mechanical properties, are considered ideal packaging materials for high-power-density and highly integrated electronic devices. However, their fabrication challenges and insufficient interfacial performance, particularly interfacial defects caused by acoustic and lattice mismatches, significantly limit further performance improvements. To address these issues, this study utilized stereolithography-based 3D printing technology to achieve rapid and precise material shaping, combined with magnetron sputtering to introduce a Ti layer, followed by reactive infiltration to fabricate Diamond/TiC/SiC composites. Advanced characterization techniques, including scanning electron microscopy, transmission electron microscopy, and energy-dispersive spectroscopy, were employed to systematically analyze the effect of TiC interlayer thickness on the interfacial structure and composite performance. The results revealed that the introduction of the TiC interlayer formed a quasi-coherent interface with good lattice matching between diamond and SiC, effectively reducing acoustic mismatch and interfacial dislocation density, thereby significantly enhancing interfacial performance. The thermal conductivity and flexural strength of the composites exhibited a trend of initial increase and subsequent decrease with increasing TiC interlayer thickness. When the TiC layer thickness reached 154 nm, the thermal conductivity and flexural strength achieved maximum values of 478 W/(m·K) and 342 MPa, respectively, representing improvements of 14.6 and 11.4 % compared to composites without the TiC interlayer. This study proposes a strategy to enhance the overall performance of composites by constructing quasi-coherent interfaces, optimizing interfacial bonding, and mitigating acoustic mismatch, providing valuable theoretical and technical guidance for the interfacial design of Diamond/SiC composites and the development of high-performance thermal management materials.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Zhangyi Huang,Zhengwei Zhu,Mingyu Su,Yang Shi,Mao Deng,Ruichong Chen,Zhijun Wang,Zhi Zhou,Jianqi Qi,Haomin Wang
This study investigated the high-temperature oxidation behaviors of TMC ceramics. The results indicate that the high-temperature oxidation curves of the four TMC ceramics follow a parabolic law, suggesting a diffusion-controlled process. The activation energies for the oxidation of TaC, NbC, TiC, and ZrC ceramics are 105.4, 124.3, 169.3, and 78.7 kJ/mol, respectively, with oxidation rate constants at 1000 °C of 16.84, 40.45, 0.18, and 14.43 mg 2 /cm 4 ·h for each ceramic, respectively. The temperatures at which the ceramics disintegrate into fragments in high-temperature air are 800, 800, >1000, and 600 °C, respectively. The anti-oxidation performance of the four TMC ceramics ranks as follows: TiC > TaC > NbC > ZrC. In comparison to the reported high-entropy carbide ceramics, the TiC ceramic in this study demonstrates superior anti-oxidation performance due to dense TiO 2 layer formation, characterized by significantly low oxidation rates and excellent structural stability.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Chinese Physics B
·
2025
·
IF 1.5
Xiaoci Ma,Yutong Hou,Keyu Shi,Jiaqi Zhang,Gaoping Yue,Qiang Tao,Yufei Ge,Pinwen Zhu
Electrically conductive carbide ceramics with high hardness and fracture toughness are promising for advanced applications. However, enhancing both electrical conductivity and fracture toughness simultaneous is challenging. This study reports the synthesis of (Ti0.2W0.2Ta0.2Hf0.2Mo0.2)C-diamond composites with varying densities using high-pressure and high-temperature (HPHT) method. The carbides are uniformly dispersed in a titanium carbide matrix, forming conductive channels that reduce resistivity to 4.6×10-7 Ω·m. These composite materials exhibit metallic conductivity with a superconducting transition at 8.5 K. Superconducting behavior may result from d-p orbital hybridization and electron-phonon coupling in transition metal carbides, such as TaC, Mo2C, and MoC. Optimizing intergranular bonding improves the fracture toughness without compromising hardness. The highest indentation toughness value is 10.1 ± 0.4 MPa·m1/2, a 130 % increase compare to pure TiC. Enhanced toughness arises from transgranular and intergranular fracture modes, multiple crack bridging, and large- angle crack deflection, which dissipate fracture energy and inhibit crack propagation. This study introduces a novel microstructure engineering strategy for carbide ceramics to achieve superior mechanical and electrical properties.
研究领域:
材料科学
·
固体力学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
·
2021
·
IF 3.871
S. Miao,Y. Lin,Y.Q. Zhao,Z.M. Xie
This work described an experimental investigation on the recrystallization behaviors of the hot-rolled particle strengthened W (PSW) material. Upon annealing, the three processes, that is, recovery, recrystallization and grain growth, proceed in a discontinuous fashion for our PSW material, and two or more processes could simultaneously occur in local regions. At an annealing temperature spanning from 1300 °C to 1500 °C, recovery is in the dominant position which is verified by deformed grains over half of the whole, accompanying with a gentle decrease in hardness. Meanwhile, recrystallization nucleation, primary recrystallization and abnormal grain growth is identified at 1300 °C, 1400 °C and 1500 °C, respectively. Further increasing the annealing temperature to 1600 °C and 1700 °C, normal grain growth takes precedence over recovery, along with a marked reduction in hardness. TEM observations show that owing to microstructural heterogeneity induced by particle dispersion, local regions have an advantage in terms of strain energy storage over other regions during hot rolling, enabling a preferential recrystallization nucleation at 1300 °C; whereas nanosized TiC particles are capable of inhibiting grain growth at elevated temperature, and thus retard the recrystallization rate. In addition, our as-rolled PSW material exhibits a different texture, and the dominant α-fiber of {100}〈011〉 and {112}〈1−10〉 transforms into γ-fiber texture of {111}〈011〉 and {111}〈−1−12〉 during recrystallization.
研究领域:
材料科学
·
金属学
✓ 已验证
产品关联
DOI
高影响因子
METALS AND MATERIALS INTERNATIONAL
·
2024
·
IF 3.3
Liang Jing,Jin Shipeng,Lv Nanying,Wang Cong,Yin Xiuyuan,Chen Suiyuan,Liu Changsheng
Ti 2 AlNb-based coatings with different TaC additions (0, 1.25, 2.5 and 5 at%) were prepared on Ti-6Al-4 V alloy to improve its surface properties by laser cladding. The effects of TaC addition on the morphology, microstructure transformation and mechanical properties of the laser cladding TiC/Ti 2 AlNb coatings were studied. The results showed that the TiC/Ti 2 AlNb coatings mainly composed of matrix B2 phase, layered O phase and a small amount of TiC. In situ formed TiC effectively refined the microstructure of the coatings. When the TaC addition increased from 0 to 5 at%, with the amount of in situ formed TiC increased from 0 to 20%, the grain size of B2 decreased from ~ 400 μm to ~ 50 μm, and the grain size of O phase decreased from ~ 3 μm to ~ 1 μm. The microhardness and wear resistance of TiC/Ti 2 AlNb based coatings improved when the TaC addition increased from 0 to 2.5 at%. The average microhardness for the sample with 2.5 at% TaC addition (602.18 HV 0.5 ) was 1.06 times that of the sample without TaC (568.36 HV 0.5 ), while the wear mass loss (16.28 mg) at 25 ℃ was only 43.4% that of the sample without TaC (37.50 mg). When the samples worn at 400 ℃ and 800 ℃ for 45 min, the wear mass losses of the sample with 2.5 at% TaC addition were only 15.13 mg and 13.50 mg, which were 50.9% and 51.5% these of the sample without TaC addition, respectively. The wear mass loss of sample with 5 at%TaC addition increased up to 16.04 mg and 16.4 mg, which means the large amount coarse TiC (dendrites) and the decrease of O phase fraction lowed the wear resistance of the TiC/Ti 2 AlNb coatings, though it still less than that of the Ti 2 AlNb coating (29.68 mg and 26.2 mg). Graphical Abstract
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
TRIBOLOGY INTERNATIONAL
·
2021
·
IF 4.872
Qipeng Huang,Xiaoliang Shi,Yawen Xue,Kaipeng Zhang,Yangyang Gao,Chaohua Wu
Inspired by the ability of tree frog toes to regulate body fluids, this control mechanism is applied to the tooth surface of slewing bearing (AISI 4140 steel (AS)) by adopting the regular hexagonal microtexture. SnAgCu-TiC (SACT) lubricants are filled in the microtextures. Results of two-factor analysis of variance show that there is a significant interaction between the microtexture and lubricants. When the microtextures with 1000 µm side are filled with SnAgCu-4 wt% nano-TiC (AS-SACT410), coefficient of friction (COF) of sample is the lowest. Compared with AS (0.437), COF of AS-SACT410 is reduced to 0.085, decreased by 80.55%. Macroscopic anti-friction originates because SnAgCu wraps around nano-TiC to form tribofilms containing submicron rollers, achieving substantially reduced COF.
研究领域:
材料科学
·
仿生学
·
摩擦学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）