ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Hongna Xing,Guankui Long,Jiming Zheng,Hongyang Zhao,Yan Zong,Xinghua Li,Yajing Wang,Xiuhong Zhu,Mingtao Zhang,Xinliang Zheng
A novel strategy of boosting electrochemical performance of hybrid supercapacitor cathode based on interface engineering by fabrication of Schottky-type conjunction is proposed. The electrode is composed of binder free 3D CoP nanoflowers decorated by CeO 2 nanoparticles , which was directly grown on nickel foam, forming a conjunction interface. Compared to CoP, the CeO 2 @CoP electrode exhibits remarkable enhanced electrochemical performance. The significantly boosted performance can be attributed to the CeO 2 @CoP interface, which promotes electrons migration from CoP to CeO 2 and eventually forms positive holes on CoP. These positive holes can easily capture more OH − , creating more active sites for redox process . Furthermore, a hybrid supercapacitor full cell composed of CeO 2 @CoP and activated carbon was assembled, which exhibits outstanding energy storage performance with a specific capacity of 486.5 mC cm −2 at 1 mA cm −2 and outstanding cycle stability of 89% after 5000 cycles. The energy density is 55.4 Wh kg −1 at a power density of 955.9 W kg −1 . This work not only demonstrates that CeO 2 is an attractive additive for supercapacitor electrodes, but also provides an experimental/theoretical understanding of the enhanced electrochemical performance by electrons migration process on CeO 2 @CoP interfaces, which is important for the design of supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zhenyuan Ji,Lizhi Chen,Hongquan Yu,Wenyao Dai,Guanxiang Tang,Huali Li,Guoxing Zhu,Aihua Yuan,Xiaoping Shen
The development of novel electrode materials with admirable electrochemical behaviors is a new opportunity to meet the current demand for the high energy density of supercapacitors. Herein, a facile molecular precursor route is used to synthesize dual functionalized Fe 2 O 3 two-dimensional nanosheets with phosphate and nitrogen-doped carbon dots (P-Fe 2 O 3 /NCDs) modifications. Taking full use of the excellent characteristics of each component, the optimized P-Fe 2 O 3 /NCDs anode material achieves superior electrochemical features with an outstanding specific capacitance of 453 F g −1 at 1 A g −1 . The cycling stability of P-Fe 2 O 3 /NCDs nanosheets is as high as 91.0 % after 10,000 cycles at 15 A g −1 . Subsequently, phosphate and NCDs modified Co 9 S 8 (P-Co 9 S 8 /NCDs) nanoflowers with convenient ion transport properties are fabricated, which possess a satisfied electrochemical capacity of 569 C g −1 at 1 A g −1 with desirable cycling stability at 15 A g −1 . Impressively, the designed P-Co 9 S 8 /NCDs//P-Fe 2 O 3 /NCDs hybrid supercapacitor can achieve an excellent energy density of 85.1 Wh kg −1 at 937.5 W kg −1 and can retain 93.9 % capacitance efficiency after 20,000 cycles at 10 A g −1 . The superior properties of the dual functionalized electrode materials provide a new choice for constructing advanced hybrid supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
MATERIALS RESEARCH BULLETIN
·
2021
·
IF 4.641
Jing Zhang,Jiajie Huang,Liang Wang,Peiheng Sun,Peijia Wang,Zhujun Yao,Yefeng Yang
As promising electrode materials for supercapacitors, metal-organic frameworks (MOFs) with rich porosity, large surface area and abundant redox sites have attracted increasing attention. Nevertheless, the intrinsically interior electrical conductivity and ease of agglomeration for most MOFs have largely restricted their energy storage application. In this work, we report the controlled fabrication of bimetallic NiMn-MOF nanosheets on the surface of NiCo 2 O 4 nanowire arrays to form NiCo 2 O 4 @NiMn-MOF core-shell structure and investigate the effect of Mn incorporation in Ni-MOF shell on the electrochemical performance of the hybrid arrays in supercapacitors. Benefitting from the delicately designed structures and compositions, the optimal NiCo 2 O 4 @NiMn-MOF electrode presents an extraordinarily high specific capacity of 243.0 mAh/g at 2 mA/cm 2 . We further assembled a flexible solid-state hybrid supercapacitor with NiCo 2 O 4 @NiMn-MOF and activated carbon as electrodes, exhibiting a high energy density of 48.2 Wh/kg at 1606.7 W/kg, accompanied by excellent mechanical flexibility and electrochemical durability. This work demonstrates a new approach for developing novel MOF array-based electrode materials with boosted electrochemical performance in the field of flexible energy storage devices.
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
Energy Technology
·
2018
·Vol. 7
·期 3
·1800476
·
IF 3.175
Zimin Jiang,Tingting Xu,Shuge Dai,Congcong Yan,Caiyun Ma,Xinchang Wang,Junmin Xu,Sen Zhang,Ye Wang
3D Ni(OH) 2 /tungsten disulfide (WS 2 ) nanofibers composed of ultrathin nanoflakes are synthesized by electrospinning followed by a hydrothermal process, which have a large specific surface of 64.56 m 2 g −1 . When tested in a three-electrode configuration, the WS 2 /Ni(OH) 2 nanofiber-based electrode exhibits a high specific capacity of 354 C g −1 at a current density of 1 A g −1 . The hybrid storage device, in which WS 2 /Ni(OH) 2 nanofibers and graphene are used as the positive and negative electrodes, respectively, exhibits a high energy density of 34 Wh kg −1 at a power density of 940 W kg −1 and a high capacity retention of 83% after 4000 cycles at 4 A g −1 . The as-synthesized 3D Ni(OH) 2 /WS 2 nanofibers provide a way for the WS 2 nanostructure to optimize its viability and potential in constructing a high-performance energy storage device.
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
Nano Research
·
2024
·
IF 9.5
Su Jihao,Yang Ling,Yu Dengbin,Dong Shaojun
A significant challenge in developing high-performance hybrid supercapacitors (HSCs) is the need to reasonably construct advanced architectures that consist of various components and exhibit superior electrochemical capacitance performance. The FeCoNi-layered double hydroxide (FeCoNi-LDH) porous material has a specific capacitance of 1960 F·g −1 when used as the anode material at 1 A·g −1 . The FeCoNi-LDH material exhibits nanoplates with a distinct spindle morphology on their surface. Due to the combined action of the three metals and abundant oxygen vacancies, they exhibit unique rate performance and cycle stability. The electronic structure of LDH and the regulation of oxygen vacancy were confirmed by density functional theory (DFT) calculations. This suggests that the strength of hydroxide can reduce the energy required for oxygen vacancy formation in FeCoNi-LDH nanosheets and enhance ion and charge transfer, as well as electrolyte adsorption on the electrode surface. The FeCoNi-LDH//activated carbon (AC) HSC has an energy density of 53.2 Wh·kg −1 at a power density of 800 W·kg −1 , surpassing other devices composed of comparable materials during the same timeframe. This study made significant advances in the design and synthesis of a ternary LDH porous structure with distinct oxygen vacancies, as well as its potential application in electrochemical energy storage.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
Jun Wang,Jiangting Wang,Guisheng Zhu,Huarui Xu,Xiuyun Zhang,Yunyun Zhao,Jian Zhang,Kunpeng Jiang,Aibing Yu
In this work, to reduce the “dead volume” due to the accumulation of synthesized products, the foam-structured NiCo 2 S 4 (FSNCS) with a specific surface area of 25.4 m 2 g − 1 was successfully synthesized by using well-dispersed SiO 2 nanospheres as the framework. The FSNCS exhibited 559.3 C g − 1 at a current density of 1 A g − 1 , which was 173.3 C g − 1 higher than the performance of the NCS synthesized without the addition of SiO 2 . Additionally, a hybrid supercapacitor is successfully assembled with FSNCS as the positive electrode and active carbon (AC) as the negative electrode. The FSNCS//AC displays maximum specific energy of 28.8 Wh kg −1 at a specific power of 375.0 W kg −1 , together with good cyclic life with 88.9% capacity retention over 5000 cycles at 8 A g − 1 . It is worth noting that the hybrid supercapacitor can provide strong power for the operation of the motor fan. The simple structure design provides an innovative and effective way to develop high-performance energy storage devices.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 34
·345706
·
IF 3.874
Leqiu He,Yan Wang,Yajie Guo,Guobing Li,Xubin Zhang,Wangfeng Cai
Novel core−shell nanostructure electrodes benefit from the excellent properties of their constituent materials, as well as the synergy between them. However, it is challenging to fabricate such structures efficiently. In this study, NiSe nanorods were fabricated using Ni foam as the conductive substrate and reactant via a one-step hydrothermal process, and Ni(OH)2 nanosheets were coated on the surface of the nanorods via one-step electrodeposition. The effect of the structure and morphology on the properties of the material was explored using scanning electron microscopy, x-ray diffraction, and electrochemical technology. The obtained core−shell NiSe/Ni(OH)2 exhibited an areal capacity of 1.89 mAh cm−2 at a current density of 5 mA cm−2. The assembled NiSe/Ni(OH)2//AC hybrid supercapacitor exhibited excellent energy and power densities, indicating that NiSe/Ni(OH)2 has great potential for use as a battery-type electrode in energy storage systems.
研究领域:
材料科学
·
电化学
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2024
·Vol. 53
·期 35
·14767-14778
·
IF 3.5
Xuan Liao,Hang Yang,Xiaolong Hou,Caini Yi,Ying Yang,Guimao Wang,Shuo Wang,Yuping Liu,Changguo Chen,Danmei Yu,Xiaoyuan Zhou
To overcome the disadvantages of poor intrinsic conductivity and stability of ZnCo2O4, a ZnCo2O4@MnMoO4 composite as an emerging pseudocapacitor electrode material with high specific capacitance, environmental friendliness, morphological diversity, and unique hierarchical structure was synthesized via a simple two-step hydrothermal method. The research results indicate that the ZnCo2O4@MnMoO4 composite can present a high specific capacity of 1628 F g−1 at a current density of 1 A g−1 and good cycling stability with 69% capacity retention after 10 000 cycles at 10 A g−1. Hybrid supercapacitors (HSCs) assembled with the ZnCo2O4@MnMoO4 cathode and activated carbon anode can deliver an energy density of 48 W h kg−1 at a power density of 695 W kg−1, and their capacity retention reached 61% after 8000 charge–discharge cycles at a current density of 10 A g−1. This could be attributed to the synergistic effect of the specific surface area and electrical conductivity enhanced by compositing ZnCo2O4 with MnMoO4. As a result, the excellent electrochemical properties show that the ZnCo2O4@MnMoO4 composite has strong application potential for high-performance supercapacitors.
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
DIAMOND AND RELATED MATERIALS
·
2021
·
IF 3.315
Xiaoyang Xu,Linan Liang,Zhenni Zhang,Rui Xiong,Xiangjing Zhang,Ying Zhao,Shanlin Qiao,Yantao Zhang
Considering the connected function, high conductivity and electrochemical double layer capacitance properties of reduced graphene oxide (RGO), the NiMoS 4 nanosheets were anchored on RGO coated Ni foam by a facile hydrothermal method to obtain the NiMoS 4 @RGO/Ni foam self-supporting electrode without the extra binders. Surprisingly, the prepared NiMoS 4 @RGO/Ni foam with unique hierarchical lamellar structure can exhibit the high specific capacity of 408 mAh/g at 0.5 A/g, which can be compared with all relevant NiMoS 4 reports. In view of the good supercapacitor performances and practical application feasibility of NiMoS 4 @RGO/Ni foam, the NiMoS 4 @RGO/Ni foam//AC hybrid supercapacitor device also can show the comparable energy density of 67.4 Wh/kg at 562.5 W/kg to that of all NiMoS 4 based hybrid supercapacitors , as well as the good cycle stability. This work can indeed improve the supercapcaitor properties of NiMoS 4 based materials, and be also treated as an important attempt of NiMoS 4 based materials for supercapacitors .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Chunwang Luo,Xianglin Ren,Zheyu Zhang,Gaojuan Wang,Yu Miao,Chunju Xu,Huiyu Chen
Herein, the mesoporous tin dioxide (SnO 2 ) electrode materials with large specific surface areas were simply prepared through an initial solvothermal method in a mixed solvent of glycerol, isopropanol, and de-ionized water, along with a post annealing treatment in air. The average size of SnO 2 varied from 1 μm to 0.5 μm by changing the volume ratio of glycerol to isopropanol, and the product was denoted as SnO 2 -5/35 and SnO 2 -20/20, respectively. The electrochemical tests revealed that such SnO 2 electrode materials exhibited battery-type response. The SnO 2 -5/35 delivered the greatest specific capacity of 219.3 C g −1 , higher than 200.4 C g −1 for SnO 2 -20/20 electrode. In the configuration of hybrid supercapacitor (HSC) device, the SnO 2 served as the cathode and activated carbon (AC) was utilized as the anode. The SnO 2 -5/35//AC HSC exhibited an energy density of 33.6 W h kg −1 at the power density of 946.9 W kg −1 . In contrast, the SnO 2 -20/20//AC HSC delivered an inferior specific energy of 28.5 W h kg −1 . Both HSCs showed excellent cyclic performance over 6000 cycles under a high current load of 10 A g −1 . These results indicate that the SnO 2 materials, especially SnO 2 -5/35, holds significant application potential in the field of electrochemical energy storage. Additionally, the current synthesis method can be extended to the preparation of other metal oxides with extraordinary electrochemical property for the practical applications in 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
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Rong Zheng,Huiling Lu,Pengjie Zhou,Yulong Ying,Longhua Li,Yu Liu
Multi-component synergy and controlled structural design can effectively tailor the electronic structure and multiply kinetic reactions, substantially enhancing the electrode material’s performance. Herein, a novel P-doped Ni 0.5 Cu 0.5 Co 2 O 4 with a 1D/2D hierarchical nanostructure is synthesized in situ. The hierarchical architecture significantly improves the exposure of active areas and facilitates the diffusion of electrolyte ions. Theoretical calculations reveal that the P-doping is instrumental in fine-tuning the electronic structure, enhancing conductivity, and increasing the adsorption energy of OH − . These theoretical insights were corroborated by electrochemical measurements. Remarkably, the optimized P-Ni 0.5 Cu 0.5 Co 2 O 4 exhibited an ultrahigh capacitance of 2872.1 F g −1 at 1 A g −1 , which is 1.58 times that of before phosphating (1810.6 F g −1 ). In addition, a hybrid supercapacitor based on 9-P-Ni 0.5 Cu 0.5 Co 2 O 4 was assembled, delivering an impressive energy density of 71.6 Wh kg −1 at a power density of 800 W kg −1 . Furthermore, the device demonstrated outstanding cyclic performance, maintaining 87.73 % of its initial capacitance even after 10,000 cycles. This study not only showcases the superior performance of P-Ni 0.5 Cu 0.5 Co 2 O 4 but also provides a promising strategy for developing high-energy storage material.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Awais Ahmad,Safia Khan,Muhammad Sufyan Javed,Sameh Osman,Hu Li,Saadat Majeed,Rafael Luque
High-rate aqueous hybrid supercapacitors (AHSCs) have attracted relevant scientific significance owing to their expected energy density, supercapacitor-level power density, and battery-level energy density. In this work, a bimetallic nanostructured material with chromium-incorporated cobalt oxide (CCO, i.e., CoCr2O4) was prepared via a hydrothermal method to form a stable cubic obelisk structure. Compared with CCO materials prepared using traditional methods, CCO displayed a nanowire structure (50 nm diameter), suggesting an enhanced specific surface area and a large number of active sites for chemical reactions. The electrode possessed a high specific capacitance (2951 F g–1) at a current density of 1 A g–1, minimum Rct (0.135 Ω), and the highest capacitance retention (98.7%), making it an ideal electrode material for AHSCs. Ex situ analysis based on X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) showed a favorable stability of CCO after 10,000 cycles without any phase changes being detected. GGA and GGA + U methods employed in density functional theory (DFT) also highlighted the enhanced metallic properties of CCO originating from the synergistic effect of semiconducting Cr2O3 and Co3O4 materials.
研究领域:
材料科学
·
能源技术
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）