RARE METALS
·
2025
·
IF 11
Han Chen-Chen,Bu Ling-Yi,Shi Feng,Wei De-Qi,Wang Kun-Yan,Gao Zi-Wei,Su Zhong,Lai Chao,Su Zhi
Fast-charging technology is indeed a critical technical problem for electric vehicles today. Improving the conductivity of electrode materials is one of the effective ways to solve this technical bottleneck. Here, we incorporated highly conductive MXene and carbon nanotubes into the electrode materials of Li 4 Ti 5 O 12 (LTO) and LiFePO 4 (LFP) to construct the composite electrode material 3D-LTO-CNT-MXene and 3D-LFP-CNT-MXene (named 3D-LTO and 3D-LFP). The 3D-LTO we synthesized demonstrated an impressive capacity of 146.2 mAh g −1 at a 20C rate (where 1C = 175 mA g −1 ), the 3D-LFP material exhibited a capacity of 104.6 mAh g −1 at a 20C rate (where 1C = 170 mA g −1 ). This remarkable rate capability can be attributed to the constructed three-dimensional conductive network, which facilitates enhanced electrical conductivity and electron migration rates, thereby promoting rapid charging and discharging of the batteries. Furthermore, we assembled a 3D-LTO||3D-LFP full cell, which demonstrated exceptional performance at a high rate of 10C (1C = 170 mA g −1 ), achieving an energy density of 68.34 Wh kg −1 and a power density of 1547.5 W kg −1 . This work demonstrates the feasibility of constructing 3D highly conductive electrode materials for rapid charging and discharging at high rates. It paves the way for the commercial application of truly ultra-fast charging in electric vehicles. Graphical abstract
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Liang Li,Zicheng Zuo,Hong Shang,Fan Wang,Yuliang Li
The main issue of Si anode is the large volume variations during alloying/dealloying processes, which severely causes the disintegration in the pre-designed conductive and mechanical networks and the interfacial contact between the current collector and Si particles ; moreover, it can hardly be overcome economically. Here, the growth methodology of ultrathin graphdiyne nanosheets is scalably developed for in-situ constructing the 3D all-carbon conductive and mechanical networks and firstly enhancing the interfacial contact between current collector and Si anode via chemical bonding. Seamlessly hold by the ultrathin graphdiyne nanosheets, the disintegrations of the silicon anodes in the conductive networks and the interfacial contact are effectively retarded; as a result, the silicon electrode shows impressive enhancements in term of the capacity (2300 mA h g –1 ), and long-term stability for high-energy-density battery (1343 W h l –1 ). Such method shows great promises for realizing the commercial-level applications of Si anode.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·
IF 4.527
Yang Yue,Yanxiang Wang,Xiaodan Xu,Chengjuan Wang,Zhiqiang Yao,Dongming Liu
The potential of two-dimensional layered MXenes in electromagnetic wave (EMW) absorption needs further development. Herein, we carried out the in situ growth of carbon nanotubes (CNTs) on the surface of Ti 3 C 2 T x MXene at ultra-low temperature via chemical vapor deposition . The obtained CNTs exhibited a bamboo-like structure and were accompanied by helical carbon nanofibers . The ultra-low temperature solved the problem that the high temperature required in the traditional CNT growth process would destroy the structural integrity of MXene. The lush CNT forest cross-linked the MXene layers, transforming the two-dimensional layered structure into a three-dimensional conductive network, providing abundant conductive channels for carriers, optimizing the impedance matching of the CNT/MXene hybrid, and resulting in a significant dielectric loss. The as-prepared CNT/MXene hybrid exhibited a minimal reflection loss of −52.56 dB (99.9994% EMW absorption) in the X-band. This work proposes a new idea to enhance the EMW absorption properties of Ti 3 C 2 T x MXene and fabricate high-performance MXene-based EMW absorbers.
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
ACS Applied Electronic Materials
·
2022
·
IF 4.494
Ya-Ru Ding,Chao-Hua Xue,Xiao-Jing Guo,Xue Wang,Shun-Tian Jia,Qiu-Feng An
A three-dimensional (3D) conductive network with high sensitivity and a wide response range is applicable for wearable strain sensors. However, structural deformation of the 3D network under mechanical stimuli gives rise to mass pores, which are easily soaked by rain, sweat, oil, and so on, thus affecting the sensitivity of the sensors. Herein, a stretchable film with outstanding superhydrophobicity is proposed for reliable strain sensors based on a 3D conductive network. First, superconductive carbon black (SCB) nanoparticles are assembled on electrospun fibers of thermoplastic polyurethane (TPU) to form a TPU/SCB conductive film. Then, a dispersion of carbon nanotubes (CNTs) and fluorinated silica (F-SiO2) is sprayed on the TPU/SCB film to form a conductive TPU/SCB@CNTs/F-SiO2 composite film. After immersion of the composite film in a mixed solution of poly(dimethylsiloxane) (PDMS) and perfluorodecyltrichlorosilane (PFDTS) and drying, a flexible conductive superamphiphobic film was obtained. When the film was used as a strain sensor, it showed superior sensitivity (12.05–60.42), a wide strain range (0–100%), a fast response time (75–100 ms), and good stability in stretching–relaxing cycles. Benefiting from the favorable superamphiphobicity, the obtained strain sensor could be effectively utilized to display stable electrical signals underwater and monitor human motions under dry/sweat exposure, showing significant potential in practical wearable sensors for stretchable, breathable, and reliable human behavior monitoring.
研究领域:
材料科学
·
传感器技术
·
生物医学工程
✓ 已验证
DOI
高影响因子
IONICS
·
2020
·Vol. 26
·期 12
·5981-5989
·
IF 2.394
Tian Weichao,Zheng Yi,Zhang Kaicheng,Ren Xin,Tian Shiyu,Cao Jingrui,Wen Lizhi,Liang Guangchuan
In this paper, the LiMn 0.6 Fe 0.4 PO 4 /C with 3D conductive network was synthesized using β-cyclodextrin (β-CD) and carbon nanotubes (CNTs) as complex carbon source by a simple preparation route which include combination of wet ball milling, spray drying, and carbothermal reduction. The unique conductive network result in the composite has sufficient contact with electrolyte and three-dimensional electron conduction path. SEM and TEM images indicate that the active materials were uniformly coated by amorphous carbon and CNTs. The addition of β-CD and CNTs not only restricted growth of active particle but also reduced electron conduction distance. The composite possesses superior electron conductivity (8.8 × 10 −2 S cm −1 ) and Li + diffusion efficiency (6.1 × 10 −13 cm 2 s −1 ) due to unique 3D conductive network. As a result, the prepared sample exhibits distinguished discharge capacity of 160.2 mAh g −1 at 0.2 C and 131.7 mAh g −1 capacity even in 10 C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Deqing Zhang,Honghan Wang,Junye Cheng,Changyu Han,Xiuying Yang,Jingyu Xu,Guangcun Shan,Guangping Zheng,Maosheng Cao
Herein, ultra-thin tungsten disulfide nanosheets/carbon nanotubes (WS 2 -NS/CNTs) hybrids were successfully synthesized by using a one-step hydrothermal method. The WS 2 -NS is evenly grown on the surfaces of CNTs , leading to a remarkable three-dimensional (3D) heterostructure. Outstanding electromagnetic wave absorption performance of the WS 2 -NS/CNTs hybrids can be achieved by tuning the amount of CNTs. The minimum reflection loss can reach up to −51.6 dB at 14.8 GHz, and the effective absorption bandwidth is 5.4 GHz for the hybrids with a thickness of 1.95 mm. Comparison of the results with those of simple mixtures of WS 2 -NS and CNTs prepared by using ultrasonic methods indicates that the absorption performance of the optimized WS 2 -NS/CNTs hybrids are closely related to that of the 3D mesh conductive network constructed by the addition of CNTs and the synergistic effect of WS 2 -NS and CNTs in the hybrids. These WS 2 -NS/CNTs hybrids open a new avenue for the development of electromagnetic wave absorbers with extraordinary absorption performance, light weight, small thickness, broad absorption bandwidth, and low cost.
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
·
2023
·
IF 6.2
Yao Liang,Yuxing Gao,Qingyun Shi,Dongming Yin,Hui Lu,Yong Cheng,Hongjin Xue,Chunping Hou,Chunli Wang,Limin Wang
SiO x material has become one of the most promising anode materials to develop high-energy Li-ion batteries (LIBs) beyond 300 Wh kg −1 . However, the practical application is usually limited by poor cycling stability due to the serious volume change of SiO x anode during lithiation/delithiation, which is difficult to overcome by the traditional carbon coating method. Herein, we construct a three-dimensional bifunctional conductive network (3D-SiO x @CNTs/C) composite by in-situ chemical vapor deposition under relatively low-temperature pyrolysis conditions. Benefiting from a mechanically flexible buffer generated from the CNTs coating layer, the 3D-SiO x @CNTs/C electrode exhibits a higher lithium storage capacity retention of about 99.8% (807.2 mAh g −1 ) after 450 cycles at 2 A g −1 than that of conventional carbon-coated strategy. The bifunctional three-dimensional conductive network offers a smooth conduction path to counter the volumetric strain through the demonstration of kinetic and impedance analyses. This work may provide an ingenious strategy to prepare CNTs-modified functional materials and helps to accelerate the application of high-capacity SiO x /C anode in practical batteries.
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
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Dong Chen,Tianjiao Zhu,Shen Shen,Yongan Cao,Yangyang Mao,Wenju Wang,Encai Bao,Hongfu Jiang
Lithium-sulfur (Li-S) batteries are regarded as highly prospective energy storage devices. However, problems such as low sulfur utilization, poor cycle performance, and insufficient rate capability hinder the commercial development of Li-S batteries. Three-dimensional (3D) structure materials have been applied to modify the separator of Li-S batteries to suppress the diffusion of lithium polysulfides (LiPSs) and inhibit the transmembrane diffusion of Li + . A vanadium sulfide/titanium carbide (VS 4 /Ti 3 C 2 T x ) MXene composite with a 3D conductive network structure has been synthesized in situ by a simple hydrothermal reaction . VS 4 is uniformly loaded on the Ti 3 C 2 T x nanosheets through vanadium-carbon(V-C) bonds, which effectively inhibits the self-stacking of Ti 3 C 2 T x . The synergistic action of VS 4 and Ti 3 C 2 T x substantially reduces the shuttle of LiPSs, improves interfacial charge transfer, and boosts the kinetics of LiPSs conversion, consequently increasing the rate performance and cycle stability of the battery . The assembled battery has a specific discharge capacity of 657 mAh g -1 after 500 cycles at 1C, with a high capacity retention rate of 71%. The construction of VS 4 /Ti 3 C 2 T x composite with a 3D conductive network structure provides a feasible strategy for the application of polar semiconductor materials in Li-S batteries. It also provides an effective solution for the design of high-performance 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
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2020
·
IF 10.652
Yanpei Li,Xiangwei Wu,Jingyi Wang,Xingpeng Gao,Yingying Hu,Zhaoyin Wen
The sodium-nickel chloride (Na-NiCl 2 ) batteries technology has been considered as one of the most promising candidates for large-scale electrical energy storage application owing to its abundant electrode material resource, high energy density and safety. However, ultra-excessive Ni in the cathode leads to high material cost and the growth of cathode particles during cycles makes degradation of batteries performances, which hinder the further application of Na-NiCl 2 batteries. To address these challenges, we designed a free-standing Ni-less cathode with Ni/NaCl particles uniformly distributed in the three-dimensional (3D) conductive matrix constructed by carbonfiber (CF) and multiwalled carbon nanotubes (MWCNTs). The 3D hierarchical structure synthesized by low-cost vacuum filtration method can offer sufficient void space to accommodate the growth of NaCl particles and effectively enhance the electronic conductivity of the cathode. When the molar ratio of Ni/NaCl in the cathode is reduced to 1.0, a specific capacity of 90 mAh g −1 for planar Na-NiCl 2 batteries can be achieved after 170 cycles at 190 °C with a capacity retention of 67%, which is higher than that of traditional tubular Na-NiCl 2 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
Frontiers in Chemistry
·
2019
·
IF 3.782
Hao Guo,Yong Hu,Xiaoping Zhang,Rongliang Zhang,Dong Hou,Yulei Sui,Ling Wu
In this paper, we report a facile one-step hydrothermal method to synthesize tetragonal Na3V2(PO4)2F3@C particles which are connected by carbon nanotubes (CNTs) networks, using water as hydrothermal solvents. In this strategy, the reduction and crystallization of materials are carried out in the hydrothermal process (180°C, 12 h), no additional heat treatment is required. The well-crystallized Na3V2(PO4)2F3 tetragonal grains (5–10 μm) are coated with amorphous nano-carbon and connected by highly conductive CNTs. The addition of CNTs can not only improve the conductivity of materials but also effectively inhibit the Na3V2(PO4)2F3 grains over growth. The Na3V2(PO4)2F3@C/CNTs composite possesses very flat charge/discharge platforms of 3.6 and 4.1 V. The sample exhibits an initial discharge specific capacity of 120.2 and 74.3 mAh g−1 at 0.1 and 10 C rate, respectively, and shows excellent cyclical stability. The composite owns excellent electrochemical performances owing to the three-dimensional highly conductive network which is co-constructed by the CNTs and nano-carbon coating layer.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Zhiwen Wang,Dong Cao,Mingxi Ren,Hanning Zhang,Limei Pan,Chuanfang John Zhang,Jian Yang
Silicon-based materials are considered the most promising anode materials for lithium-ion batteries (LIBs). However, due to the huge volume effect of Si powder during charging and discharging, the pulverization and peeling of silicon nanoparticles results in a certain amount of active material loss, which significantly affects the stability and coulombic efficiency of the battery . In this paper, a simple suspension mixing-freeze drying process was used to prepare a Si@Ti 3 C 2 T x composite with a fluffy and porous structure , in which Si nanoparticles (SiNPs) are wrapped in a 3D conductive network of wrinkled and curled Ti 3 C 2 T x nanosheets . Thus, both Si nanoparticle agglomeration and restacking of Ti 3 C 2 T x nanosheets are inhibited, electrolyte penetration and charge transfer are facilitated, and Si nanoparticle volume expansion is effectively buffered. When used as an LIB anode, after 500 cycles and at a density of 1 A g −1 , a high specific capacity of 1729 mAh g −1 and coulombic efficiency of ≥ 98.5% were achieved for Si@Ti 3 C 2 T x , showing excellent electrochemical performance .
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2019
·Vol. 30
·期 13
·12307-12314
·
IF 2.195
Liu Wenming,Li Weizhen,Yue Lansong,Gan Wenjun
A conductive macro-network was fabricated by dip-coating silver nanowires (AgNWs) on the polyurethane (PU) sponge skeleton and a semi-conductive epoxy nanocomposite was obtained. The resulting nanostructures exhibit an effective pathway to achieve low electrical percolation threshold for a scalable 3D conductive network with low loading of fillers. The epoxy composites filled with conductive 3D foams show the enhanced thermal stability, glass transition temperature and mechanical properties. The volume resistivity of the obtained epoxy/PU@AgNWs composites decreases from 1.1 × 10 17 to 1.9 × 10 5 Ω cm with ultralow AgNWs loading of ~ 0.14 vol%, and meanwhile thermal conductivity is improved by 45% at 0.282 W/mK compared to neat epoxy resin. This method might be a scalable and effective way for the applications in the high-performance semi-conductive engineering devices.
研究领域:
材料科学
·
纳米技术
·
高分子化学
✓ 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）