ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Lei Liu,Cheng Wang,Ze Wu,Youqiang Xing
The main challenge in manufacturing an ionic actuator of large bending displacement and great response sensitivity is to design a flexible electrode with great electrochemical characteristics and conductivity. This research reports the MXene-PEDOT:PSS/AgNWs (MPA) electrode with a three-dimensional (3D) network structure formed by a hybrid method of the one-dimensional (1D) silver nanowires (AgNWs) and the two-dimensional (2D) Ti3C2Tx MXene. Here, a soft actuator based on the ionic cross-linked hybrid electrode was designed. The results show that the MPA electrode-based soft actuator achieves a large bending strain (0.48%, ±0.5 V sine voltage), wide frequency (0.1–10 Hz), 5 h durability (91.9% retention), fast response time (≈5 s), great power density (7.53 kW m–3), and great energy density (18.83 kJ m–3). These excellent performances contribute to the 3D structure of electrodes formed by MXene and AgNWs creating an unhindered ion channel, which facilitates short diffusion and rapid injection of ions and provides higher capacitance and mechanical integrity. This 3D network layered structure hybrid electrode provides an opportunity for the development of ultralow-voltage-drivable artificial muscles.
研究领域:
材料科学
·
生物医学工程
✓ 已验证
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
Xiaoqing Bin,Yapeng Tian,Yangyang Luo,Minhao Sheng,Yijia Luo,Maomao Ju,Wenxiu Que
In order to obtain high-performance flexible electrodes for supercapacitors, the nitrogen-doped delaminated-Ti 3 C 2 T x (N-d-Ti 3 C 2 T x ) decorated with MoO x nanoparticles (N-d-Ti 3 C 2 T x /MoO x ) films are prepared by a one-step solvothermal method. The N-d-Ti 3 C 2 T x nanosheets with high conductivity can facilitate electron transfer during the charge and discharge process, and the MoO x nanoparticles can contribute to high pseudocapacitance. Hence, their combination is expected to not only inhibit N-d-Ti 3 C 2 T x nanosheets from re-stacking, but also enhance the specific capacity of the whole electrode. Here, benefiting from the synergistic effect of the two components, the obtained optimal flexible and free-standing N-d-Ti 3 C 2 T x /MoO x film electrode delivers an ultrahigh capacity of 341.0 C g −1 (920.6 C cm −3 , 487.1 F g −1 , 1315.2 F cm −3 ) at the scan rate of 2 mV s −1 , and shows superior capacity retention of 99.2% after 11000 cycles at the current density of 5 A g −1 . Moreover, the flexible and free-standing N-d-Ti 3 C 2 T x /MoO x film electrode is also beneficial to promote the development of flexible supercapacitors.
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 ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Xinrui Qiang,Chao Feng,Bingzhe Jia,Han Wang,Yan Wang,Xinming Wu
The same element heterojunction structure can effectively improve the energy density of the electrodes with its unique structural properties, but the specific mechanism of heterojunction action is not clear. Based on this, in this paper, the same element heterojunction electrode constructed with FeOOH on NiFe-LDHs can reach a specific capacitance of 4.34 F cm -2 at 2 mA cm -2 . After 6000 cycles, its capacity is still maintained to 95.67% (30 mA cm -2 ). The FeOOH@NiFe-LDHs//AC flexible supercapacitor device was prepared to achieve a specific capacitance of 1.06 F cm -2 at 2 mA cm -2 . More notably, an impressive energy density of 0.47 mWh cm -2 at 1.78 mW cm -2 was achieved, which is higher than previous reported. In addition, the capacitance remains 96.3% after 3000 cycles at 50 mA cm -2 , and the electrode exhibited flexibility and outstanding bending stability. The high energy density of the electrodes in this study is attributed to the resulting Fermi energy level differences, which provide more carriers and increase the conductivity of the electrode material. This suggests that the heterojunction has obvious advantages for increasing the energy density of both flexible and non-flexible electrodes, and also provides new ideas for the application of supercapacitors in wearable electronic devices.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Wei Shao,Zitong Wu,Yi Liu,Guoan Tai
As an exceptional metallic Dirac material, borophene shows promise for superior mechanical and electronic properties, making it increasingly significant in electronics. Both theoretical predictions and experimental evidence underscore its potential in energy storage applications. However, due to existing limitations in synthesis techniques, the application of stacked borophene as flexible electrodes remains unexplored. This study aims to overcome these challenges by introducing an innovative in situ co-eutectic salt method for synthesizing AB-stacked hydrogenated borophene sheets. These sheets are then employed to fabricate large-scale electrodes and construct flexible electric double-layer supercapacitors based on borophene. The robust mechanical stability of stacked borophene facilitates significant improvements in interfacial characteristics and energy storage performance through rolling processes. This enhancement results in increased specific capacity, improved rate performance, and enhanced cyclic stability of thin-film electrodes. Specifically, the optimized borophene-based supercapacitor achieves a high specific areal capacitance of up to 417.3 mF/cm 2 in an organic electrolyte at a current density of 1 mA/cm 2 , which represents a twofold improvement compared to non-stacked borophene structures. Remarkably, it retains over 88.3 % of this specific areal capacitance even at a high current density of 15 mA/cm 2 , demonstrating impressive rate capability. Furthermore, after 5000 charge–discharge cycles, the capacitance retention exceeds 89.3 %. This research is expected to catalyse the application and advancement of borophene in future flexible and portable electronic devices, highlighting its potential transformative impact in energy storage technologies.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Mingwei Liang,Weijing Wang,Yi Jiang,Chenyang Liao,Qin Long,Xuefei Lai,Li Liao
The commercial application of silicon is still impeded by poor conductivity and significant volume change. In this work, a C@Si@G composite was synthesized by a facile chemical solution reaction and carbonization procedure with cocoon silk as a natural carbon source. This composite has a sandwich structure, where Si nanoparticles as a sandwich middle layer and graphene (G) as an out layer. And it possesses the advantages of flexible, nitrogen-doped and is environmentally friendly. The optimized C@Si@G-15 composite is used as a self-supporting anode without a current collector, and it shows a reversible discharge capacity of 972 mAh g −1 after 120 cycles at 1 A g −1 and a relatively high capacity of 1070 mAh g −1 after 300 cycles at 200 mA g −1 , demonstrating the effect of coating the N-doped carbonized silk and the graphene synergistically to improve electrical connectivity and to constrain the pulverization of Si nanoparticles. Hence, it delivers great potential for application on wearable devices .
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
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Yi Li,Yanbiao Li,Minoru Hashimoto
In this work, a novel planar actuator based on plasticized poly (vinyl chloride) gel and flexible silicone grease electrodes is proposed to realize a new soft actuator with high performance under low driving voltages. The proposed planar PVC gel actuator (PPGA) can demonstrate a strain of 21%, an output stress of over 0.6 MPa and a respond time of about 90 ms, only at a low driving voltage of 120 V. These performances are comparable to those of the biological muscle and are much better as compared to 10–12% strain and 0.09 MPa stress at 400 V for the traditional stainless electrodes-based multilayered PVC gel actuator (MPGA). In addition, compared to the typical planar dielectric elastomer actuator (DEA) (3 M VHB4905), the operating voltage and response time for the PPGA are reduced by one order of magnitude. A theoretical model is used to discuss the difference between the two types of actuators, finding a good agreement with the experimental results. Furthermore, the PPGA can be continuously actuated for more than 1 million times which shows a good durability. These results demonstrate the feasibility of PPGA as a soft actuator, so a wide application is expected.
研究领域:
材料科学
·
软体机器人学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Man Qi,Fan Li,Zheng Zhang,Qiao Lai,Yuwen Liu,Jianmin Gu,Liqiu Wang
Aqueous zinc-ion batteries (ZIBs) are receiving a continuously increasing attention for the flexible and wearable electronics, due to their non-toxicity, non-flammability, and low-cost features. The development of high-performance flexible cathodes is of great significance to the development of flexible ZIBs. In this work, the flexible electrode of three-dimensional (3D) interconnected ultrathin MnO 2 nanosheets on carbon cloth (CC@MnO 2 ) coated with Ti 3 C 2 T x MXene (CC@MnO 2 @MXene) is prepared by electrodeposition and dipping methods, in which CC@MnO 2 is put into MXene dispersion for impregnation treatment to make the CC@MnO 2 fibers wrapped with MXene completely. The results show that the coating of MXene improves the conductivity of the composite, and the interface between MXene and MnO 2 provides more active sites. Therefore, CC@MnO 2 @MXene-10 electrode as the cathode of zinc ion battery provides high charge storage performance (517.0 mAh g −1 at 0.1 A g −1 ), excellent cycling stability (80.6 mAh g −1 after 800 cycles at 1 A g −1 ) and excellent energy density (701.3 Wh kg −1 at 133.8 W kg −1 ). Finally, flexible quasi-solid battery based on CC@MnO 2 @MXene composite as cathode was assembled, and the flexible electrodes show potential for application.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2018
·
IF 4.439
Yun Mou,Hao Cheng,Hao Wang,Qinglei Sun,Jiaxin Liu,Yang Peng,Mingxiang Chen
Stability of conductive ink and mechanical flexibility of conductive pattern are essential for flexible printed electronics. In this work, we reported a stable reactive silver ink for the facile fabrication of flexible electrodes. The ink was mainly composed of silver-isopropanolamine (IPA) complex, formic acid reductant, and hydroxyethyl cellulose (HEC) adhesive agent, and it displayed good chemical stability. The flexible electrodes on polyimide (PI) substrates were achieved by mask-printing and thermal sintering of the ink, and the effects of sintering parameters and HEC adhesive agent content on the electrical and flexible properties and microstructure evolutions of silver layer were systematically investigated. Consequently, the silver layer sintered at 110 °C yields low electrical resistivity of 12.1 μΩ·cm, which is only eight times higher than that of bulk silver. Furthermore, the sintered silver layer still presents excellent flexibility and low relative resistances after the bending, twisting, and folding tests. These results demonstrate that the stable reactive silver ink provides a promising and low cost opportunity for low temperature design and fabrication of high performance flexible printed electronics.
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
ChemElectroChem
·
2019
·Vol. 6
·期 6
·1768-1775
·
IF 3.975
Qinghua Wang,Wenhao Ren,Feng Gao,Chunyu Qiu,Qingxiang Wang,Fei Gao,Chuan Zhao
Graphical Areal capacitance as high as 3291 mF/cm 2 was obtained for carbon cloth by thermal treatment. Carbon cloth, an inexpensive and conductive textile, holds great promise as substrate for constructing electrical double-layer capacitors due to its mechanical and electrochemical superiority. However, its widespread application is significantly hampered by the intrinsic low specific capacity. In this work, we demonstrate that the areal capacitance of commercial carbon cloth is raised for 800-folds by a direct thermal activation strategy. When evaluated as the symmetric supercapacitor electrodes, thermally activated carbon cloth (TACC) displays the outstanding performance with areal capacitance up to 3291 mF cm −2 and the energy density of 740 μW h cm −2 at a power density of 9000 μW cm −2 . In addition, the TACC-based electrode reserves 95.2 % capacitance after 10,000 charge-discharge cycles in a neutral NaBF 4 electrolyte, showing outstanding cycle durability of the material. This work offers a foolproof and scalable method to prepare flexible electrode materials for wearable energy storage devices.
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 MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2017
·Vol. 28
·期 20
·15338-15344
·
IF 2.019
Tian Xinli,Yang Chuang,Si Lili,Si Gaoli
Here we report a flexible supercapacitor electrode fabricated via a simple method by applying a continuous polyaniline (PANi) coating on the surface of a cellulose nanofibers (CNFs) film. On one hand, we can recycle a large amount of bamboo fiber waste. On the other hand, we greatly improve the processing performance of PANi by making full use of CNFs’ superior mechanical properties. The flexible eco-friendly CNFs/PANi film can be directly used as an electrode without binder. SEM and FTIR measurements indicate there is a very secure combination between CNFs and PANi. The CNFs/PANi electrode boasts fine mechanical properties, excellent reversible performance and good specific capacitance (254.7 F/g at current density of 0.2 A/g). We expect the hybrid electrode will be used for flexible supercapacitor application.
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
Nanomaterials
·
2021
·Vol. 11
·期 11
·2903
·
IF 5.076
Yan Li,Ye Zhang
Low-dimensional nanomaterials have attracted considerable attention for next-generation flexible energy devices owing to their excellent electrochemical properties and superior flexibility. Herein, uniform Tellurium nanotubes (Te NTs) were prepared through a facile hydrothermal method, and then a flexible and freestanding electrode was fabricated with Te NTs as active materials and a small amount of nanofibrillated celluloses (NFCs) as a flexible matrix through a vacuum filtration method without adding extra conductive carbon or a binder. The resulting Te-based electrode exhibits a high volumetric capacity of 1512 mAh cm−3at 200 mA g−1, and delivers admirable cyclic stability (capacity retention of 104% over 300 cycles) and excellent rate performance (833 mAh cm−3at 1000 mA g−1), which benefits from the unique structure and intrinsically superior conductivity of Te NTs. After bending 50 times, the Te-based electrode delivers a desirable volumetric capacity of 1117 mAh cm−3, and remains 93% of initial capacity after 100 cycles. The results imply that the Te-based electrode exhibits excellent electrochemical properties and superior flexibility simultaneously, which can serve as a potential candidate for the flexible lithium batteries.Keywords:tellurium nanotubes;nanofibrillated cellulose;flexible electrode;Li-Te battery
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Chunyan Luo,Haibo Che,Bingzhe Jia,Xinrui Qiang,Jiarui Li,Lei Wang,Jiale Wang,Yichi Liu,Zhiqiang Li,Xinming Wu
MXene all-solid-state supercapacitors show significant potential for various applications, however, the poor cycling stability under bending stresses restricts their feasibility in commercial use. To address this challenge, a flexible PLA/MXene electrode material with excellent cycling stability was prepared. Electrochemical testing revealed that the PLA/MXene electrode material exhibited a capacity retention of 96.3% after 10,000 cycles under 5 A/g current density. Furthermore, asymmetric all-solid-state supercapacitors, constructed with PLA/MXene film electrodes, retain 92.3% of their initial capacitance after 2,000 charge-discharge cycles at bending angles of 0°, 30°, 60°, and 90°, respectively. The significant improvement suggests that trace amounts of PLA can enhance the cycling stability of MXene electrodes compared to the 84.7% capacitance retention observed in MXene-based supercapacitors. This work provides a straightforward approach to fabricating future flexible wearable devices.
研究领域:
纳米材料科学
·
能源存储技术
·
柔性电子器件
✓ 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）