JOURNAL OF ELECTROANALYTICAL CHEMISTRY
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2023
·
IF 4.5
Ruobing Zheng,Lili Zhu,Changdian Li,Ziqiang Wu,Yanan Huang,Jie Yang,Renhuai Wei,Xuebin Zhu,Yuping Sun
Misfit-layered Ca 3 Co 4 O 9 was investigated as oxygen evolution reaction catalyst for electrochemical water splitting. Oxygen vacancies can be effectively induced by ball milling as detected by electronic paramagnetic resonance and X-ray photoelectron spectrometer measurements. The electrochemical performance was investigated for the Ca 3 Co 4 O 9 catalysts with different ball milling times. The results show that the sample with the ball milling time of 24 h possesses the best performance due to the induced oxygen vacancies as well as the enhanced specific surface area. This work will provide an effective route to improve the electrochemical oxygen evolution reaction performance of the misfit-layered cobaltates.
研究领域:
材料科学
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电催化
·
能源转换
✓ 已验证
产品关联
DOI
高影响因子
ACTA MATERIALIA
·
2023
·
IF 9.4
Siyu Wang,Ning Ding,Dandan Han,Ping Wang,Yupeng Dang,Pengcheng Xu,Yanwei Sui,Yen Wei
Defects in nanomaterials have been widely used to introduce new properties of pristine materials for electrochemical energy storage. However, most of the research has focused on the effect of single defect while ignoring the synergy of multifold defects on enhancing electrochemical performance . Herein, we have modeled bulk phase oxygen substitution and surface oxygen vacancy on ZnCo 2 O 4 nanowires grown on nickel foam for the first time (F-ZnCo 2 O 4-x ), revealing the role of double defects and providing new insights into the effects of electrochemical properties . The enhanced oxygen vacancy concentration and increased active sites enable rapid and sufficient redox reaction of the active components. Therefore, the representative F-ZnCo 2 O 4-x electrode achieves a high specific capacity of 664 mAh·g −1 at 1 A·g −1 . Moreover, high energy density (E HSC , 60 Wh·kg −1 ) and good cycle stability (90.44% capacity retention after 10000 cycles) could be provided as a battery-type electrode of hybrid supercapacitor . The electrodes also have high energy density (E cell , 692 Wh·kg −1 ) and good durability (capacity retention of 98.8% after 2000 cycles) when used as zinc ion batteries . This work supplies a new avenue on the universality of defect engineering to design bimetallic oxide with high electrochemical performance .
研究领域:
材料科学
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电化学能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2023
·
IF 6.4
Zhifang Feng,Bona Zhang,Peijun Ji,Ruiyuan Hu,Bin Gao,Xiaofeng Wang,Yu-Lan Meng,Xue-Zhi Song,Zhenquan Tan
Bi2O3 is increasingly used in supercapacitors because of its high theoretical specific capacitance, but poor inherent conductivity and poor ion diffusion limit its actual capacitance. Therefore, the rational design of the surface and structure of Bi2O3 is the key to improve the specific capacitance of Bi2O3. Here, we report the fabrication of high-performance negative electrodes from Bi2O2CO3 nanosheets wrapped around Bi2O3 arrays (Cu foam@Bi2O3@Bi2O2CO3) by a combination of electrical substitution, oxidative calcination, and hydrothermal methods. The realized Cu foam@Bi2O3@Bi2O2CO3 presents a surface cross-linked laminar structure, which shortens the electrolyte penetration path. The direct replacement growth of Bi on copper substrates to obtain subsequent composites allows for enhanced adhesion between the electrode material and the collector, facilitates charge transfer to the electrode material, and achieves ultrahigh loadings (13.2 mg cm–2). In addition, the constructed asymmetric supercapacitor has a maximum energy density of 1.6 mW h cm–2 (45.5 W h kg–1) at a power density of 6.2 mW cm–2 (175.9 W kg–1). This work provides a simple design strategy to enhance the electrochemical performance of Bi2O3.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2023
·Vol. 13
·期 9
·1600
·
IF 3.4
Huili Lei,Xuan Zhang,Si Chen,Chengbo Li,Guojiang Wan
Liquid phase deposition is a cost-effective and energy-efficient method for obtaining TiO2films at low temperatures. This work demonstrates the use of a multifunctional template consisting of grafted gallic acid (GA) and hexamethylenediamine (HD) on a Ti substrate to regulate the deposition of TiO2films. X-ray diffraction characterization shows that films deposited with the template have a more obvious anatase phase compared to direct deposition at 25 °C. The intensity of photoluminescence spectra also shows significant differences at 373.7 nm and 663.3 nm. Furthermore, electrochemical measurements indicate that TiO2films adjusted by the template have excellent electrochemical conversion properties. This proposed method provides a new simple route for fabricating TiO2films that are adjusted by GAHD templates, which may have good applications in the fields of semiconductor materials and biological materials.Keywords:titanium dioxide;GAHD;template adjusted deposition;liquid phase deposition
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 6
·期 8
·2118-2125
·
IF 5.934
Xianglong Huang,Wei Wang,Jianhua Deng,Wei Gao,Dingyu Liu,Qianru Ma,Maowen Xu
In this study, a novel hollow carbon matrix was designed and prepared using a facile NaCl crystal template for the effective encapsulation of Se. This superior carbon electrode plays a significant role in facilitating sufficient energy storage and conversion of Se-based cathode materials. A large specific surface area of 416 m2 g−1 was obtained, and the matrix provided numerous hollow spheres for the storage of Se. The thermogravimetric analysis and electrochemical results show that the as-prepared Se-hollow porous carbon composite with an ideal Se content of 42% can make excellent capacity contribution. The hollow porous structure not only effectively accommodates the volumetric expansion during the discharge–charge process but also makes the composite have a good contact with the electrolyte. In addition, the 3D open framework structure can be conducive to fast electron transportation. As a result, the Se-hollow porous carbon composite exhibited outstanding electrochemical performance when evaluated as a cathode material for rechargeable K–Se batteries.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
·
IF 13.273
Huiqiao Liu,Yanan He,Kangzhe Cao,Yong Jiang,Xiaogang Liu,Qiang-Shan Jing,Lifang Jiao
Al has been considered as a promising Li-ion batteries anode. However, the volume expansion always makes the electrode in an unstable structure. Meanwhile, the natural Al 2 O 3 passivation layer may lead to a large voltage dip, which could interrupt the lithiation process and result in a limited capacity. Herein, we report a neat avenue to activate the commercial Al pellet electrode by replacing the Al 2 O 3 layer with Sn at room temperature. Not any acid or tedious process is needed. Benefiting from the elimination of Al 2 O 3 and high electrochemical-activity of Sn, the obtained Al@Sn pellet electrode delivers a reversible capacity of 959.5 mAh g −1 at 0.1 A g −1 , which is larger than that (395.7 mAh g −1 ) of the commercial Al pellet electrode and approaches the calculated theoretical capacity. Notably, the voltage dip is muchly lowered to 0.03 V from 0.1 V. When graphene oxide (GO) was further attached for relieving the volume expansion, the as-prepared Al@Sn@GO pellet electrode presents astonishing Li-ion storage properties both in half and full batteries. This work demonstrates that the cooperation of the Al 2 O 3 elimination and matrix addition is successful in promoting the Li-ion storage properties of Al anode, presenting an attractive vision for the development of practical Al-based anodes.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2017
·
IF 9.446
Qizhao Wang,Jijuan He,Yanbiao Shi,Shuling Zhang,Tengjiao Niu,Houde She,Yingpu Bi,Ziqiang Lei
The leaf-like structure BiVO 4 electrode and MFe 2 O 4 /BiVO 4 (M = Ni, Co) composite photoelectrodes were prepared by electrochemical deposition, ensuing heating treatment and electrophoretic deposition technology. The characterizations of SEM, XRD and DRS indicated that the BiVO 4 derivatives mainly existed in small nanoparticles with monoclinic phase and exhibited stronger light absorption capability than that of pure BiVO 4 . Hereon, the respective photoelectrochemical (PEC) activities of BiVO 4 and its derived composites were systematically studied. The results suggested that the NiFe 2 O 4 /BiVO 4 and CoFe 2 O 4 /BiVO 4 not only showed higher photocurrent response values at 1.23 V vs. NHE than pure BiVO 4 electrode under visible light illumination, but also played a superior PEC hydrogen evolution performance, which was considered owing to their strong absorption to light, reduction combination of carriers and effective separation of electrons and holes.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
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2022
·Vol. 26
·期 6
·1359-1368
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IF 2.747
Chen Renhong,Mei Jie,Xu Jin,Xu Wanjie,Wang Laisen,Chen Yuanzhi,Peng Dong-Liang
High-voltage LiNi 0.5 Mn 1.5 O 4 with a spinel structure is considered as important cathode materials for high-energy density Li-ion batteries (LIBs). In this study, we investigate the size, structure, and the electrochemical performance of LiNi 0.5 Mn 1.5 O 4 electrodes prepared by using two different-sized Mn 3 O 4 nanocrystal precursors under different calcination conditions. As the calcination temperature rises, the particle sizes of the acquired LiNi 0.5 Mn 1.5 O 4 cathode materials can vary from ~ 100 nm to ~ 1 µm, and the morphology changes from nano round shape to truncated octahedral shape. The content of Mn 3+ is closely related to the calcination temperature and is affected by the size of Mn precursor. It is found that the LiNi 0.5 Mn 1.5 O 4 sample prepared by using 50-nm-sized Mn 3 O 4 nanocrystals under a calcination temperature of 800 C exhibits good cycling performance with a capacity retention ratio of 96.1% at 1 C after 200 cycles, while the LiNi 0.5 Mn 1.5 O 4 sample prepared by using 7-nm-sized Mn 3 O 4 nanocrystals under a calcination temperature of 800 °C shows an excellent rate performance with a capacity retention ratio of 98% after 500 cycles at 10 C. The results show that the size of Mn 3 O 4 precursor is an important parameter that governs the final size and electrochemical performances of LiNi 0.5 Mn 1.5 O 4 cathode materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Polymers
·
2020
·Vol. 12
·期 10
·2192
·
IF 3.426
Qiu-Shi Rao,Song-Yi Liao,Xing-Wen Huang,Yue-Zhu Li,Yi-Dong Liu,Yong-Gang Min
In this work, a few-layer MXene is prepared and sprinkled on a commercial polypropylene (PP) separator by a facile spraying method to enhance the electrochemistry of the Ni-rich LiNi0.8Co0.1Mn0.1O2(NCM811) cathode. Scanning electron microscope (SEM) and X-ray diffraction (XRD) are used to characterize the morphology and structure of MXene. Fourier transform infrared spectroscopy (FT-IR) and a contact angle tester are used to measure the bond structure and surface wettability PP and MXene/PP separator. The effect of the MXene/PP separator on the electrochemical performance of ternary NCM811 material is tested by an electrochemical workstation. The results show that the two-dimensional MXene material could improve the wettability of the separator to the electrolyte and greatly enhance the electrochemical properties of the NCM811 cathode. During 0.5 C current density cycling, the Li/NCM811 cell with MXene/PP separator remains at 166.2 mAh/g after the 100 cycles with ~90.7% retention. The Rctof MXene/PP cell is measured to be ~28.0 Ω. Combining all analyses results related to MXene/PP separator, the strategy by spraying the MXene on commercial PP is considered as a simple, convenient, and effective way to improve the electrochemical performance of the Ni-rich NCM811 cathode and it is expected to achieve large-scale in high-performance lithium-ion batteries in the near future.Keywords:polypropylene composite membrane;MXene;Ni-rich LiNi0.8Co0.1Mn0.1O2;electrochemical performance
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Waste and Biomass Valorization
·
2018
·Vol. 11
·期 5
·2201-2209
·
IF 1.874
Tong Zizheng,Qi Yuruo,Zhao Junmei,Liu Lilu,Shen Xing,Liu Huizhou
In this work, a one-step hydrothermal strategy has been developed for the synthesis of carbon-coated Na 3 (VOPO 4 ) 2 F with the aid of biomass (e.g. glucose, fructose or starch), where biomass plays the key role of carbon source and reducing agent for reducing vanadium(V) to vanadium(IV). The effect of different biomass on the morphologies has been examined. Furthermore, the synthetic mechanism was deduced by investigating the impact of hydrothermal time on the synthesis. In addition, the vanadium oxidation state has been finally confirmed by XPS and UV–Vis. The as-synthesized carbon-coated Na 3 (VOPO 4 ) 2 F shows a superior long-term cycling performance, such as the capacity retentions are higher than 70% after 1400 cycles at a current rate of 5 C. The higher content of carbon will lead to the better rate capability. The present study suggests that the one-step hydrothermal technique using biomass as a reducing agent appears to be a facile and green low-cost approach to prepare the promising cathode material Na 3 (VOPO 4 ) 2 F.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 16
·7819-7827
·
IF 11.301
Yuanyuan Zhu,Xu Ji,Lufeng Yang,Jin Jia,Shuang Cheng,Hailong Chen,Zhong-Shuai Wu,Donata Passarello,Meilin Liu
Mo2C is one of the few compounds that possess good electronic conductivity. Meanwhile, it possesses a natural 1D zigzag tunnel structure that is ideally suited for fast ion diffusion. Here, an effective approach is demonstrated for fabrication of structurally stable N-doped Mo2C/C nanobelts. They demonstrate high and fast energy storage ability with initial capacitances of 1139 C g−1 at 1 mV s−1, 151 C g−1 at an extremely high scan rate of 2000 mV s−1 and 208 C g−1 at a discharge current density of 200 A g−1. After electrochemical activation of cycling, the capacity is continuously enhanced and much higher capacitances of 2523 C g−1 at 1 mV s−1 and 1403 C g−1 at 50 A g−1 are achieved after 15 000 cycles at 50 mV s−1. Using the power law, it is evaluated that a surface-controlled capacitive process makes the main contribution to the capacity, which is over 90% when the scan rates are higher than 10 mV s−1 and still high as 73% at 1 mV s−1. From in situ synchrotron XRD, it is found that there is a negligible change in the crystal structure and volume during charging/discharging, reflecting an insertion-type charge storage mechanism.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
·
2016
·Vol. 21
·期 1
·125-131
·
IF 2.327
Ren Yurong,Lu Peng,Huang Xiaobing,Ding Jianning,Wang Haiyan
Li 2 ZnTi 3 O 8 /C nanocomposite has been synthesized using phenolic resin as carbon source in this work. The structure, morphology, and electrochemical properties of the as-prepared Li 2 ZnTi 3 O 8 samples were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), Raman spectroscopy (RS), galvanostatic charge–discharge, and AC impedance spectroscopy. SEM images show that Li 2 ZnTi 3 O 8 /C was agglomerated with a primary particle size of ca. 40 nm. TEM images reveal that a homogeneous carbon layer (ca. 5 nm) formed on the surface of Li 2 ZnTi 3 O 8 particles which is favorable to improve the electronic conductivity and inhibit the growth of Li 2 ZnTi 3 O 8 during annealing process. The as-prepared Li 2 ZnTi 3 O 8 /C composite with 6.0 wt.% carbon exhibited a high initial discharge capacity of 425 and 159 mAh g −1 at 0.05 and 5 A g −1 , respectively. At a high current density of 1 A g −1 , 95.5 % of its initial value is obtained after 100 cycles.
研究领域:
材料科学
·
纳米技术
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）