ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Qin Hao,Houyi Ma,Zhicheng Ju,Guangda Li,Xiaowei Li,Liqiang Xu,Yitai Qian
LiCoO 2 nanoparticles were prepared through a sol–gel method, and then appropriate amount of CuO nanoparticles were deposited onto their surfaces to improve their cycling performances. It is found that the CuO coated sample has the capacity retention higher than 90% at the rates below 30 C after 10 cycles, which also has the highest capacities of 135 and 123 mAh g −1 at 40 C (5480 mA g −1 ) and 50 C (6850 mA g −1 ), respectively. The cyclic voltammograms result reveals that the CuO coating reduces the polarization and improves the electrochemical activity of cathode. In addition, experimental results indicate that CuO coating plays an important role in reducing the charge transfer resistance of the cell during cycling, which has been demonstrated by the electrochemistry impedance spectroscopy analysis. The above data indicate the potential application of CuO coated LiCoO 2 in high power field.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2021
·Vol. 8
·期 22
·2101179
·
IF 6.147
Tingting Meng,Jianhong Zhang,Huichao Wang,Nuo Fu,Mengpei Wang,Weishang Li,Ruixin Shi,Bo Peng,Peng Li,Ziwei Deng
The complex pollutants in wastewater including insoluble oils, organic dyes, and bacteria, have caused severe environmental problems, which are harmful to ecosystems and human health and are complex and difficult to achieve wastewater purification with one material or single procedure. Herein, a facile, yet environmentally benign strategy is proposed to fabricate a superhydrophilic/underwater superoleophobic CuO-coated mesh for all-in-one wastewater treatment. In this strategy, the hierarchical micro/nanostructured CuO-coated mesh is fabricated via an oxidation–dehydration process, which simultaneously endows the mesh with superwetting ability, remarkable photocatalytic degradation ability, and excellent photodynamic antibacterial activity. This CuO-coated mesh first exhibits the special underwater superoleophobicity, superior durability, reusability, and high antifouling capability, which ensures its high separation efficiency for oil/water mixtures. Then, this CuO-coated mesh is underwater superoleophobic, possessing the remarkable photocatalytic degradation performance of organic dye contaminates in water and excellent photodynamic antibacterial activities against Escherichia coli and Staphylococcus aureus under visible-light irradiation. As such, it plays a multi-role in wastewater remedy, significantly simplifying the implementation and saving the cost in practice. This work suggests a promising approach for the design of multi-functional materials in environmental remedies.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2019
·
IF 14.229
Songxue Wang,Jiayu Tian,Qiao Wang,Feng Xiao,Shanshan Gao,Wenxin Shi,Fuyi Cui
A CuO coated ceramic hollow fiber membrane with dual functionalities of membrane filtration and peroxymonosulfate (PMS) activation was successfully constructed by applying phase-inversion and dip-coating technologies. The CuO coating condition was investigated, and the optimized CuO coated ceramic hollow fiber membranes (CuO@CHFMs) exhibited excellent catalytic activity for PMS activation to depredate bisphenol A (BPA) in the presence of humic acid (HA), chloride ions (Cl − ) and bicarbonate (HCO 3 − ). Based on the scavenger experiments and electron paramagnetic resonance (EPR) analyses, the non-radical reactive oxygen species - singlet oxygen ( 1 O 2 ), rather than sulfate radicals (SO 4 •- ) or hydroxyl radicals ( • OH), was elucidated as the primary reactive species responsible for the oxidation of BPA in the system. The redox circles of Cu(II)/Cu(I) on the CuO surface of the CuO@CHFMs are mainly responsible for PMS activation and a possible degradation pathway of BPA was proposed. Moreover, the CuO@CHFMs exhibited excellent stability and reusability without tedious catalyst separation/recovery processes. This study is meaningful for the development of novel catalytic membrane with PMS activation functionality in water treatment.
研究领域:
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Shen-Gen Gong,Yan-Hong Shi,Yang Su,Yan-Fei Li,Lei Ding,Jian Lin,Guo-Duo Yang,Bing Li,Xing-Long Wu,Jing-Ping Zhang,Hai-Ming Xie,Hai-Zhu Sun
Flexible asymmetric supercapacitor (FASC) systems are expected to exhibit not only excellent energy storage properties and safety but also satisfactory flexibility and robust integration. However, tremendous issues such as low capacitance, narrow voltage window, and poor mechanical properties still exist. In this paper, a novel kind of 3D lamellar Mn(OH)2 nanosheets on Cu-plated carbon cloth with a core-shell integrated framework (CPCC@CuO@Mn(OH)2) is fabricated to obtain the flexible material in the FASC. In this unique CPCC@CuO@Mn(OH)2 electrode material, the high theoretical specific capacity of CuO and Mn(OH)2 brings superior energy storage properties. Meanwhile, as the shell part, the deposited Mn(OH)2 layer and coated CuO layer work as both capacity contributors and substrate protectors, simultaneously maintaining the high capacitance and satisfactory flexibility of the electrodes. Therefore, the capacitance successfully achieves around 8140 mF cm–2 under 0.5 mA cm–2. Significantly, the assembled FASC (named as CPCC@CuO@Mn(OH)2//CC@AC) achieves a working voltage of up to 2.4 V. In the case of a high-power density close to 34.31 mW cm–3, its energy density reaches around 6.29 mW h cm–3. Moreover, the capacity holds 88.9% even after 10,000 cycles, showing its great application potential in the field of wearable electronics.
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
危险品化学品经营许可证（带存储）