JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2018
·Vol. 22
·期 12
·3977-3983
·
IF 2.509
Li Kaidi,Zhang Fangfang,Wu Haoran,Wang Yina,Du Jimin,Lu Yayun,Wang Weimin,Zhao Guoyan,Kang Dae Joon
Here, we demonstrate the synthesis of sheet-shaped Co 2 P grown on carbon cloth (sheet-shaped Co 2 P-CC) through a facile route. Electrochemical measurements indicated that sheet-shaped Co 2 P-CC with a loading of 0.6 mg cm −2 Co 2 P (denoted Co 2 P-CC-0.6) exhibits exceptional electrocatalytic activity in the hydrogen evolution reaction (HER), with an overpotential of 94 mV at a current density of 10 mA cm −2 and a small Tafel slope of 80 mV decade −1 in 1 M KOH. Similarly, sheet-shaped Co 2 P-CC-0.6 was also found to be an excellent electrocatalyst for the HER in 0.5 M H 2 SO 4 and in 0.5 M phosphate buffer solution (PBS), with overpotentials of 95 and 231 mV at a current density of 10 mA cm −2 , respectively. Sheet-shaped Co 2 P has a large surface area, meaning that it can provide a relatively large number of active sites on its surface, and CC is an highly conductive substrate that, when used in conjunction with Co 2 P, can enhance the conductivity of the electrocatalyst. These outstanding results show that sheet-shaped Co 2 P-CC could be an excellent candidate for a highly efficient electrocatalyst.
研究领域:
电化学
·
材料科学
·
能源催化
·
纳米技术
·
表面科学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2025
·
IF 8.3
Ruobing Zheng,Yu Yang,Qian Chen,Jie Huan,Lili Zhu,Yuping Sun,Xuebin Zhu
Co 3 O 4 catalysts were grown on ZnO/carbon cloth (CC) by electrodeposition and then the ZnO layer was etched by KOH, and the electrocatalytic water oxygen evolution reaction was investigated. The introduction and etching of ZnO layer can enhance the specific surface area of Co 3 O 4 due to the increased interface between Co 3 O 4 layer and CC as well as the smaller grain size, leading to more active site exposure. Moreover, oxygen vacancies were increased obviously through the above processing, leading to the further improvement in oxygen evolution reaction performance. The porous Co 3 O 4 through ZnO etching was exhibited 337.40 and 385.40 mV at the current density of 10 and 40 mA cm −2 , respectively, and the Tafel slope of porous Co 3 O 4 through ZnO etching is 79.60 mV dec −1 . The results will provide a feasible route to optimize the oxygen evolution reaction performance of Co 3 O 4 catalysts.
研究领域:
材料科学
·
电化学
·
催化化学
·
能源材料
·
纳米材料
✓ 已验证
产品关联
DOI
高影响因子
Energy Materials
·
2024
·Vol. 4
·期 3
·N
·
IF 11.8
Zihao Wang,Tao Chen,Zhicui Song,Jianxiong Xing,Aijun Zhou,Jingze Li
Integrating metallic lithium (Li) with a three-dimensional (3D) host is a popular strategy for long-life Li composite anodes, where the structure and physicochemical nature of the framework are critical for the electrochemical performance. Herein, Li-rich dual-phase barium (Ba)-based alloy composed of BaLi4 intermetallic compounds and Li metal phases is thermally incorporated into commercial carbon cloth sheets to develop Li-Ba alloy composite (LBAC) anodes featuring a porous array of BaLi4 microchannels as the built-in 3D skeleton. Doping of metallic Ba can greatly lower the surface tension of liquid Li and improve the wettability of the molten Li-Ba alloy toward the carbon cloth substrate. Moreover, LBAC benefits from the superior lithiophilicity and the porous architecture of BaLi4 skeleton nested in a conductive carbon fiber matrix, leading to stable cycling performance by confining Li stripping/plating in microchannels network of BaLi4 alloy framework and dissipating high current densities. As a result, the LBAC symmetrical cells can run stably for 1,000 h under 1 mA cm-2 and 1 mA h cm-2, and the capacity retention can retain 93.3% after 300 cycles in the full cell with areal capacity of 2.45 mA h cm-2. This work offers a smart designing strategy of 3D Li alloy composite anodes by introducing porous and lithiophilic alloy scaffold as sub-framework of the carbon hosting anode, promising the prospect of Li metal batteries for future applications.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米结构材料
·
金属电池
·
界面工程
·
固态离子学
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2025
·
IF 6.9
Jingwei Wang,Yaoyong Dong,Xuejun Zheng,Bei long,Hui Ling,Long Xie,Zhenhua Xiang,Wenyuan He
This report reveals that the hydrogen evolution activity of VS 2 can be effectively strengthened by inducing the surface charge redistribution of VS 2 via P non-metal doping. The XRD, TEM, GPA, EDS and XPS characterizations confirm that the P atoms are successfully doped into the VS 2 /CC matrix by substituting S atoms, resulting in lattice tensile strain and charge redistribution. The optimal P-doped VS 2 on carbon cloth (P-VS 2 /CC) exhibits a low overpotential of 274 mV at − 50 mA cm −2 and a small Tafel slope of 65.4 mV dec -1 , much lower than those of VS 2 /CC counterpart (622 mV and 120.1 mV dec −1 , respectively). Moreover, the P-VS 2 /CC delivers a long-term stability for 55 h without decay at 10 mA cm −2 , outperforming the VS 2 /CC. Density functional theory calculations suggest that P doping can induce the charge transfer from S and V to nearby P atoms, resulting in the decrease of hydrogen adsorption free energy at the S and V sites and the increase of total density of states at the Fermi level, thus far super hydrogen evolution activity. This work provides a hopeful new route for strengthening the HER activity of VS 2 , and offers a new perspective for developing advanced transition-metal chalcogenides electrocatalysts.
研究领域:
材料科学
·
电化学
·
纳米催化
·
能源材料
·
计算材料学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Yaru Huang,Maoting Gan,Shaofeng Ni,Chuan Tan,Xiangwen Gao,Fengjiao Yu
Na O 2 batteries have garnered increasing attention due to their high energy density and the abundance of sodium resources. However, the lack of efficient air cathodes has hindered their practical application, preventing the realization of stable and long cycling lifespans. Herein, we report the Na O 2 batteries using Fe-doped CoP nanowire arrays on carbon cloth (FeCoP-CC) as the air cathode, which exhibit a low overpotential of 200 mV, a high discharge specific capacity of 2853 mAh g −1 , and stable cycling performance over 200 cycles at a current density of 200 mA g −1 . The exceptional electrochemical performance can be attributed to the optimized adsorption of oxygen species by FeCoP-CC, which forms film-like NaO 2 discharge products that facilitate the oxygen transport channels. Furthermore, the film-like discharge products and the extensive contact interface with the cathode accelerate charge transfer and effectively decompose during subsequent charging processes. This work provides valuable insights into the rational design of electrocatalytic air cathodes.
研究领域:
电化学
·
能源材料
·
纳米材料
·
电催化
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2024
·
IF 4.1
Xingrong Yin,Xiongwei Wu,Fangzhong Liu,Bei Long
The vanadium oxyhydroxide has attracted considerable attention as a cathode in aqueous zinc-ion batteries due to its changeable morphology and high theoretical capacity. However, poor conductivity and structural disintegration limit its further application. Herein, we prepare VOOH nanoparticles and apply them onto carbon cloth, followed by coating with poly(3,4-ethylenedioxythiophene) (VOOH@PEDOT). The PEDOT coating layer and carbon cloth substrate significantly mitigate volume change and enhance electrode conductivity during cycling. Benefiting from the improved charge transfer and structural stability, the optimized VOOH@PEDOT displays an excellent discharge capacity of 230 mA h/g and good cycle stability over 500 cycles at 1 A/g. Additionally, the energy storage mechanism is elucidated through ex-situ XRD analysis.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）