Materials Chemistry Frontiers
·
2020
·Vol. 5
·期 1
·430-437
·
IF 6.788
Mengyu Hong,Jingjing Meng,Huihui Yu,Junli Du,Yang Ou,Qingliang Liao,Zhuo Kang,Zheng Zhang,Yue Zhang
Zinc oxide (ZnO) has been widely considered as a promising candidate in electro-chemical devices due to the high electrical transport performance and easy-fabrication. However, the active chemical properties of ZnO nanobelts restrict their application in practical electro-chemical devices. Here, we adopted an indium doping strategy to improve the corrosion resistance of ZnO nanobelts. Compared with other atomic doping methods, the indium doping method not only formed several layers of indium atoms in the body of ZnO nanobelts but also created a ZnxIn1−xO passivated layer on the ZnO nanobelt surface. After doping indium atoms into ZnO nanobelts, the self-corrosion potential increased and the self-corrosion current decreased which greatly reduced its corrosion rate in the electrochemical solution. Furthermore, the electrical transport properties of indium-doped zinc oxide (In–ZnO) nanobelts presented ultrahigh stability even after being soaked in the electrochemical solution for 43 hours. The enhanced anticorrosive quasi-2D ZnO nanobelts offer a promising development of ZnO-based electro-chemical devices.
研究领域:
材料科学
·
纳米技术
·
电化学
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2019
·
IF 5.383
Li Wang,Xingwei Li,Gengchao Wang
An electrochemical stable conductive network is built to improve the pseudocapacitance of polyaniline . As a proof-of-concept demonstration, p olyaniline/ITO composite is synthesized by in-situ oxidation polymerization of aniline in the dispersed system of ITO nanoparticles . The electrical conductivity of the optimal polyaniline/ ITO composite is 14.42 S cm −1 , while that of contrast polyaniline is 1.88 S cm −1 . P olyaniline/ ITO coated on the oxidized carbon cloth (polyaniline/ITO@oxidized carbon cloth) displays a specific capacitance of 1505.7 mF cm −2 at a current density of 0.5 mA cm −2 , and the capacitance retention reaches 75% with a growth of the current density from 0.5 to 5 mA cm −2 , while those of polyaniline@oxidized carbon cloth are 847.9 mF cm −2 and 68.3% . It is noteworthy that the capacitance retention of polyaniline/ITO@oxidized carbon cloth symmetrical capacitor is high up to 90.1% after 2000 cycles at a current density of 1 mA cm −2 . Moreover, a high energy density of 31.18 μWh cm −2 is also attained at a power density of 0.35 mW cm −2 .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yongchuan Liu,Yuanqiang Chen,Xiangxin Zhang,Changxin Lin,Hu Zhang,Xiaofei Miao,Junhong Lin,Sujing Chen,Yining Zhang
Aqueous Zinc–polyaniline (Zn-PANI) batteries have attracted attention due to their high safety and low cost but they suffer from the limited water electrochemical window (1.23 V), fast capacitance decay derived from the structural instability of PANI, and poor electroactivity of PANI in low acidic electrolytes due to its de-protonation. Herein, we firstly report a decoupling design of acid-alkaline electrolyte to maximize the electrochemical window of the electrolyte and optimize the redox chemistry of both PANI cathode and Zn anode. The PANI electrode delivers a higher stability in H 2 SO 4 electrolytes than the conventional Zn 2+ neutral or weakly acidic electrolytes. The optimized electrolyte-decoupling Zn-PANI (EDZPB) battery exhibits an expanded electrochemical stability window over 2 V, a high capacity of 213.3 mAh g −1 at 0.1 A g −1 , and a high cycling life stability (only 6.8% loss after 3000 cycles), showing the great potential of the design for applications in large-scale energy storage.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ChemCatChem
·
2019
·Vol. 11
·期 7
·1884-1888
·
IF 4.495
Bing Chang,Qin Liu,Ninghua Chen,Yingchun Yang
Graphical Catalysis in bloom : A flower-like beta bismuth oxide shows an excellent NH 3 yield of 19.92 μg h −1 mg −1 cat. and Faradaic Efficiency of 4.3 % at −0.8 V with good selectivity in 0.1 M Na 2 SO 4 solution.A flower-like bismuth oxide as an efficient, durable and selective electrocatalyst for artificial N2 fixation in ambient condition from @Chengdu_China Ammonia is a basic industrial chemical, which is widely used in industry and agriculture. Traditional Haber–Bosch N 2 fixation process is not environmentally friendly, which not only excessively consumes energy, but releases enormous amount of greenhouse gas. Electrochemical N 2 reduction is an ideal alternative to N 2 fixation, but it requires effective electrocatalyst for N 2 reduction reaction (NRR). Herein, we develop a flower-like β-Bi 2 O 3 catalyst for artificial N 2 fixation with outstanding NRR performance and selectivity in ambient condition. This β-Bi 2 O 3 nanoflower shows an excellent NH 3 yield of 19.92 μg h −1 mg −1 cat. and Faradaic Efficiency of 4.3 % at −0.8 V in 0.1 M Na 2 SO 4 solution, better than most reported NRR electrocatalysts. This electrocatalyst also exhibits superb electrochemical stability and durability.
研究领域:
材料科学
·
催化化学
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2021
·
IF 3.605
Manqi Zhang,Tianbao Dong,Degang Li,Kai Wang,Xuezhong Wei,Shaomin Liu
The development of aqueous sodium-ion batteries (ASIBs) has been greatly restricted as a result of their narrow electrochemical stability window (ESW) (about 1.23 V). Many researchers attempt to expand the ESW using high concentrations of electrolyte solution or choosing titanium or other inert materials as collectors. However, these methods would lead to higher battery costs. In this work, we demonstrated a low-cost ASIB system, in which the cathode, anode, and electrolyte solution were applied by graphene oxide (GO)-modified Na2MnFe(CN)6 (PBM), zinc sheet, and solution of Na2SO4 (1 M) and ZnSO4 (1 M), respectively. When the graphite sheet with high hydrogen and oxygen evolution overpotential was used as the collector, the ESW was expanded to about 3.4 V. The full cell owned a stable discharge platform and high discharge potential (∼1.8 V). Furthermore, the modification of PBM by reduced graphene oxide (rGO) obviously increased the discharge capacity to 110 mAh g–1, extended the cycle life (91% capacity retention after 200 cycles), and greatly improved the rate capacity (76% capacity for 500 mA g–1 rate). It should also be noted that the full cell consisting of a rGO/PBM cathode and zinc anode could achieve an energy density as high as 165 Wh kg–1.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Shi Jia Li,Guang Tao Fei,Shao Hui Xu,Wen Chao Chen,Hai Yan Xu,Xiao Xuan Qu,Xin Feng Li,Hao Miao Ouyang
Poly (ethylene oxide) (PEO)-based solid-state electrolytes are the most researched and widely used polymer solid-state electrolytes, but their ionic conductivity, electrochemical stability window, and cycling stability all need further improvement. In this work, 15 Crown ether 5 and the high concentration of lithium salts are added into PEO solid-state electrolytes using a solution-casting approach. The resulting solid-state electrolyte exhibits an ionic conductivity of 3.14 × 10 −3 S cm −1 at 60 °C and an electrochemical stability window exceeding 5.2 V. The assembled Li//Li symmetric battery can be stably cycled for over 850 h at a current of 0.1 mA cm −2 , and the LiFePO 4 //Li battery has an initial discharge capacity of 144 mA h g −1 at 2C rate, retaining 85 % of its capacity after 800 cycles. By optimizing the solid-state electrolyte components, Li//Li symmetric batteries can achieve cycling stability for up to 2200 h, and LiFePO 4 //Li batteries can endure up to 2000 cycles at a 2C rate and 4800 cycles at a 5C rate. Moreover, the prepared solid-state electrolyte can be matched with a high-voltage cathode electrode, offering a wide range of potential applications and promising commercialization prospects.
研究领域:
材料科学
·
能源存储
·
电池技术
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2020
·
IF 4.65
Hongyu Gong,Ruizhi Yang,Bo Yang,Fan Li,Ling Li
The slow kinetics of the oxygen reduction reaction (ORR) remains a great challenge in many energy storage and conversion devices, such as alkaline fuel cells and metal-air batteries. Herein, a self-supported Au-based alloy (AuCuMo) was successfully synthesized by a one-pot hydrothermal method . By combining Cu and Mo, the electronic structure of Au was finely tuned. Furthermore, the electrochemical stability of surface Cu was enhanced by the incorporation of Mo. Benefitting from these advantages, the reaction of oxygen and oxygenated intermediates on AuCuMo was optimized, and the intrinsic activity was improved. AuCuMo thereby exhibited superior ORR activity and stability compared to commercial Pt/C catalysts.
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
·
2025
·
IF 13.2
Qibing Wu,Xufeng Wang,Yuan Qin,Bin Shi,Bin Xiang,Xuefeng Zou
Due to its high voltage, high capacity, and high thermal stability, NiCl 2 is considered one of the best choices for cathode materials in high-power, high-capacity thermal batteries. However, its characteristic of being easily miscible with electrolytes at high temperatures poses a huge challenge to its application. This work proposed a simple, scalable strategy through using a commercial porous MgO (PMO) as absorber and buffer layer as well as an industrial-grade multilayer graphene (MLG) as conductive agent to manage the mutual solubility process and improve the electronic conductivity. Research finds that owing to strong coupling between components, the introduction of PMO and MLG can greatly improve the electrochemical stability of NiCl 2 , resulting in excellent thermal battery performance. When the content of PMO introduced is 8 wt%, the specific capacity of Li-B|EG|N-2 battery is 285.3 mA h/g (cut-off voltage at 2.0 V) at a current density of 200 mA cm −2 , almost 3.8 times than that of the pure NiCl 2 (only 73.4 mA h/g). When the current density is 500 mA cm −2 , its specific capacity can still reach 278.3 mA h/g. Meanwhile, its peak voltage reaches 2.461 V, while that of the pure NiCl 2 battery is only 2.38 V. Especially, it exhibits high initial voltage and continuous stable voltage output. Therefore, this work provides a feasible approach for the industrial preparation of highly stable NiCl 2 -based cathodes with excellent thermal battery performance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Sa Xue,Yongqi Liu,Kun Hou,Maogang He,Xiangyang Liu
Ionic liquids with non-flammability and wide electrochemical window are the promising candidates for the next-generation high-energy lithium metal batteries (LMBs). However, their high viscosity and low ionic conductivity lead to a limited cycling performance, hindering their commercial application. Herein, a new ionic liquid-based electrolyte (ILE) composed of lithium bis(fluorosulfonyl)imide (LiFSI), N -methyl- N -propylpyrrolidinium bis(fluorosulfonyl)imide (Pyr 13 FSI), ethyl methyl carbonate (EMC) and fluorinated ethylene carbonate (FEC) is designed to address this barrier. The new ILE exhibits high conductivity, which is twice that of pure ILE. In addition, FEC that is weakly coordinated to Li + increases the combination between Li + and FSI − indirectly, inducing a deeper co-decomposition of FSI − and FEC, thereby leading to a construction of LiF-rich solid electrolyte interphase (SEI). Consequently, Li/Cu battery maintains a higher lithium stripping/plating Coulombic efficiency (CE) of 96.3 % at 250 cycles and Li/LiFePO 4 battery reaches a 93.2 % capacity retention at 150 cycles with an average CE of 99.8 %. The designed ILE with both high conductivity and electrochemical stability opens up a new insight for the rational design of electrolytes applied in next-generation LMBs.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 24
·期 9
·2075-2079
·
IF 5.16
Yicheng Wei,Xiang Ren,Hongmin Ma,Xu Sun,Yong Zhang,Xuan Kuang,Tao Yan,Dan Wu,Qin Wei
Graphical Blowing bubbles : A sawtooth-like Co(TCNQ) 2 MOF array was fabricated by means of a solution immersion method at room temperature. This Co(TCNQ) 2 /Co shows superior oxygen-evolving activity, and only needs an overpotential as low as 310 mV to drive a geometrical catalytic current density of 15 mA cm −2 in 1.0 m KOH. Notably, it also demonstrates good long-term electrochemical durability with a high turnover frequency. Energy conversion and storage systems such as water splitting devices and metal-air batteries need excellent and energy-efficiency oxygen evolution reaction (OER) catalysts. This work reports the in situ development of sawtooth-like Co(TCNQ) 2 (TCNQ=tetracyanoquinodimethane) metal–organic framework array on Co foil (Co(TCNQ) 2 /Co) by means of a solution immersion method at room temperature. As an oxygen-evolving catalyst, the resulting Co(TCNQ) 2 /Co demonstrates superior OER activity with overpotential of 310 mV to drive a geometrical catalytic current density of 15 mA cm −2 in 1.0 M KOH. Notably, it also shows good long-term electrochemical durability with its activity being retained for at least 20 h and achieves a high turnover frequency of 0.66 mol O 2 s −1 at overpotential of 380 mV.
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 MATERIALS RESEARCH
·
2021
·Vol. 36
·期 6
·1250-1261
·
IF 3.089
Lin Zhilan,Zhu Jianhui,Zhang Peixin,Deng Libo
Abstract Spherical carbonaceous materials are considered as ideal electrode materials for supercapacitors because of their high electrical conductivity and excellent electrochemical and mechanical stability. However, their overall performances are yet to be enhanced to meet the future demands. Herein, we prepared a supercapacitive carbon microsphere with hierarchical porous structure and doped them with both nitrogen and phosphor. This was achieved by a facile hydrothermal treatment of cyclodextrin, followed by pyrolysis in the presence of ammonium dihydrogen phosphate and finally by KOH activation. Benefiting from the porous microspheres structure, large surface area, and rich nitrogen and phosphorus heteroatoms, the as-prepared materials demonstrated excellent capacitive performance, with a specific capacitance of 182 F g −1 at 1.0 A g −1 and good rate performance as well as 100% retention after repeated charging and discharging for 5000 cycles, which are superior to the carbon microspheres without heteroatom doping. Graphic abstract
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
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Zilan Feng,Daize Mo,Zhipeng Wang,Shijie Zhen,Jingkun Xu,Baoyang Lu,Shouli Ming,Kaiwen Lin,Jinhua Xiong
ABSTRACT In this study, the electropolymerization of a novel methyl substituted unsymmetrical nitrogen analog of 3,4-ethylenedioxythiophene (EDOT), N-methyl-3,4-dihydrothieno[3,4-b][1,4]oxazine (MDTO) in air and moisture stable ionic liquid 1-butyl-3-methylimidazolium hexafluorophosphate (BmimPF 6 ) was reported. Electrochemical study demonstrated that MDTO exhibited a significantly lowered oxidation potential (0.51 V) and the resultant PMDTO films possessed favorable electroactivity and excellent electrochemical stability and could be further doped by cyclic voltammetry to substantially improve its doping level. The polymers also provided an optical band gap of about 1.6 eV, switching from slight blue in the oxidized form to dark blue in the reduced form with good optical contrast (24.0%), moderate response time (6.8 s) and excellent switching stability and color persistence ability.
研究领域:
材料科学
·
电化学
·
光学
✓ 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）