ACS Applied Energy Materials
·
2018
·
IF 0
Huanhuan Guo,Guangmei Hou,Jianguang Guo,Xiaohua Ren,Xiaoxin Ma,Linna Dai,Shirui Guo,Jun Lou,Jinkui Feng,Lin Zhang,Pengchao Si,Lijie Ci
Lithium–oxygen batteries (LOBs) have attracted increasing interest because of their superior theoretical specific energy. However, the stability of lithium metal anode is one of the obstacles limiting their practical applications. Here, we introduce an artificial Li3PO4 solid electrolyte interphase (SEI) film to protect the lithium anode in LOB with LiI/LiNO3/DMSO (dimethyl sulfoxide) electrolyte. The Li3PO4-protected Li anode exhibits excellent electrochemical stability during the Li stripping/plating process and leads to a relatively uniform and featureless surface in LOB after cycling. Our research demonstrates that superior electrochemical performance can be achieved in the Li–O2 battery with the synergistic combination of the DMSO-based electrolyte, the LiI redox mediator, and the Li3PO4-protected Li anode. The LOB with a Li3PO4-protected Li anode exhibits a prolonged cycling life span of 152 cycles with a fixed capacity of 1000 mA h g–1 at 2 A g–1. The results in this work provide knowledge for the development of a robust strategy for protecting the Li anode in the applications of Li–O2 batteries.
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MATERIALS LETTERS
·
2014
·
IF 2.269
Ming Yan,Yan Yan,Chao Wang,Wei Lu,Weidong Shi
In this letter, Ni 2+ doped InVO 4 nanocrystals were successfully synthesized by a simple one-pot microwave-assisted method. The energy bandgap of obtained samples can be precisely controlled by varying the Ni 2+ doping amount. The O 2 production rate of obtained Ni–InVO 4 nanocrystals is higher than that of pure InVO 4 nanocrystals under visible-light, which can be ascribed to the narrowed band gaps. The corresponding 1% doped sample N1 has the highest O 2 production rate (394 μmol/h) in all samples, which is 66% higher than the undoped sample N0.
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高影响因子
GREEN CHEMISTRY
·
2014
·Vol. 17
·期 1
·335-342
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IF 6.852
Muge Niu,Yucui Hou,Shuhang Ren,Wenhua Wang,Qitian Zheng,Weize Wu
Conversion of cellulose, the most abundant biomass, shows a high selectivity to yield formic acid (FA), when oxidized by O2 in NaVO3–H2SO4 aqueous solution. This conversion involves various reactions including hydrolysis and oxidation. In this work, the relationships between these reactions were studied. There are mainly two hydrolyses and two oxidations occurring in the conversion: initial hydrolysis (from cellulose to monosaccharides) and deep hydrolysis (from monosaccharides to levulinic acid); catalytic oxidation (from monosaccharides to FA) and ordinary oxidation (from levulinic acid to acetic acid). Among these four reactions, catalytic oxidation to FA and deep hydrolysis to byproducts are competitive. The increasing rate of deep hydrolysis is faster than that of catalytic oxidation, when temperature is increased. Catalytic oxidation is promoted and deep hydrolysis is suppressed, when the O2 pressure is increased. Moreover, deep hydrolysis is promoted and catalytic oxidation is suppressed, when H2SO4 concentration is increased. The hydrolysis–oxidation pathway of this conversion was proposed. Thus, the byproducts could be inhibited, and FA-oriented transformation could be realized.
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高影响因子
Journal of Physical Chemistry C
·
2014
·
IF 4.835
Sujie Chang,Shigang Ruan,Erlong Wu,Weixin Huang
Oxide-on-metal particles with exposed interfaces exhibit wealthy structures and functions, but their facile synthesis remains as a challenge. Herein we report a facile O2-assisted hydrothermal method to synthesize CeO2-on-Ag particles with different CeO2 thicknesses. In this novel approach Ag particles catalyze the O2 + H2O reaction to form surface hydroxyls that induce the preferential nucleation of Ce(OH)3 on the surfaces of Ag particles, eventually forming CeO2 adlayers on Ag particles. CeO2-on-Ag particles exhibit the CeO2 thickness-dependent SERS effect in which their best SERS effect is 2 orders stronger than that of Ag particles. They also exhibit CeO2 thickness-dependent catalytic performance in CO oxidation in which the best one is as active as traditional CeO2-supported Ag catalyst. These results open up new opportunities to synthesize oxide-on-metal particles and explore their functions by tuning the oxide adlayer thickness.
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高影响因子
SOLID STATE IONICS
·
2016
·
IF 2.38
Guofeng Xu,Qingrui Xue,Jianling Li,Zhanyu Li,Xinping Li,Tianheng Yu,Jiguang Li,Xindong Wang,Feiyu Kang
Lithium-excess layered cathode materials Li[Li 0.2 Mn 0.54 − x Sm x Co 0.13 Ni 0.13 ]O 2 (x = 0, 0.01, 0.03, 0.05) with different quantities of Sm were synthesized by the coprecipitation-calcination method. The rare earth element samarium (Sm) was introduced into the structure of Li[Li 0.2 Mn 0.54 Co 0.13 Ni 0.13 ]O 2 as the replacement at Mn sites. The refinement unit cell parameters from the X-ray powder diffraction patterns illustrate the doping of Sm facilitates enlarging the lithium ions diffusion passageway space of the Li[Li 0 . 2 Mn 0.54 Co 0 . 13 Ni 0.13 ]O 2 structure. The Li[Li 0.2 Mn 0.51 Sm 0.03 Co 0.13 Ni 0.13 ]O 2 electrode presented the best electrochemistry properties. The initial discharge capacity is 287.5 mAh g − 1 and the initial coulombic efficiency increases from 81.31% to 85.34% with a constant current density of 12.5 mA g − 1 , which can be attributed to the suppression of the oxygen release from the structure at the initial charge-discharge process. The Li[Li 0·2 Mn 0.51 Sm 0.03 Co 0.13 Ni 0.13 ]O 2 electrode delivers 236.1 mAh g − 1 after 40 cycles and the capacity retention ratio is 82.12% while only 206.8 mAh g − 1 and 70.85% are obtained after 40 times of cycling for the pristine electrode. The Nyquist plots indicate that the electrical conductivity and interfacial electrochemical reaction activity increase as well.
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高影响因子
ADVANCED MATERIALS
·
2024
·Vol. 36
·期 31
·2404319
·
IF 27.4
Zongqiang Sun,Xiaodong Lin,Chutao Wang,Yanyan Tan,Wenjie Dou,Ajuan Hu,Jiaqing Cui,Jingmin Fan,Ruming Yuan,Mingsen Zheng,Quanfeng Dong
Lithium–oxygen (Li–O 2 ) batteries, renowned for their high theoretical energy density, have garnered significant interest as prime candidates for future electric device development. However, their actual capacity is often unsatisfactory due to the passivation of active sites by solid-phase discharge products. Optimizing the growth and storage of these products is a crucial step in advancing Li–O 2 batteries. Here, a fluorine-doped bimetallic cobalt-nickel oxide (CoNiO 2– x F x /CC) with an interlaced catalytic surface (ICS) and a corncob-like structure is proposed as an oxygen electrode. Unlike conventional oxide electrodes with a “single adsorption catalytic mechanism,” the ICS of CoNiO 2− x F x /CC offers a “competitive adsorption catalytic mechanism,” where oxygen sites facilitate oxygen conversion while fluorine sites contribute to the growth of Li 2 O 2 . This results in a change in Li 2 O 2 morphology from a surface film to toroidal particles, effectively preventing the burial of active sites. Additionally, the unique open architecture aids in the capture and release of oxygen and the formation of well-contacted Li 2 O 2 /electrode interfaces, which benefits the complete decomposition of Li 2 O 2 products. Consequently, the Li–O 2 battery with a CoNiO 2− x F x /CC cathode demonstrates a high specific capacity of up to 30923 mAh g −1 and a lifespan exceeding 580 cycles, surpassing most reported metal oxide-based cathodes.
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PubMed
高影响因子
Journal of Cleaner Production
·
2025
·
IF 10
Mingjie Huang,Bingyuan Xu,Ke Feng,Wei Xiang,Xiaohui Wu,Yiliang Lv,Tao Zhou
Microscale zero valent iron (ZVI) is a promising material for in situ water purification through O 2 activation, but its activity is hindered by the slow electron transfer rate caused by the shielding effect of the surface passivation layer. Herein, we introduce a synergistic strategy that combines an inorganic ligand, i.e., tetrapolyphosphate (TPP), with magnetic field (MF) to boost the O 2 activation efficiency of ZVI under neutral conditions. This approach has resulted in a 4.7-fold increase in the degradation rate of diclofenac (DCF) compared to the MF-unassisted system and a remarkable 22.0-fold improvement over an analogous system with MF and EDTA. Multiphysics simulations, batch experiments, and characterizations revealed that the enhanced degradation rate was not only attributed to the elevated magnetic gradient on the ZVI surface to enrich the paramagnetic O 2 and Fe ions, but also to the functions of TPP to suppress the annihilation of •OH and reduce the redox potential of Fe 2+ /Fe 3+ . Furthermore, a synergistic mechanism between MF and TPP that facilitates the detachment of the surface-bound Fe 3+ -TPP complex into the aqueous phase, thereby regenerating the surface active sites was elucidated. This study underscores the potential of the MF-TPP synergy as an effective strategy to enhance ZVI-based Fenton-like catalysis for pollutant remediation.
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高影响因子
JOURNAL OF NUCLEAR MATERIALS
·
2025
·
IF 3.2
Chengyu Wang,Xiaorui Xu,Yang Tong,Wentao Zhou,Yafei Wang
Pyroprocessing of spent nuclear fuel is an important step in nuclear fuel cycle with the purpose of minimizing the radiation impact on environment and recycling useful elements. One major concern in the development of pyroprocessing is the structural material corrosion in LiCl-KCl molten salt electrolyte, which is the core component of the spent nuclear fuel reprocessing. To understand the influence of O 2- impurity on the structural material corrosion in LiCl-KCl molten salt, the study investigates the corrosion behavior of Inconel 600 alloy in LiCl-KCl molten salt containing different amounts of O 2- impurities at 500 °C by immersion corrosion experiments and electrochemical analyses.The results indicate that O 2- could accelerate the high-temperature corrosion behavior. The alloy surface developed a bilayer oxide structure following 500-hour exposure to molten salt with 3 mol% O 2- , identified as a 3.36-μm-thick outer Li 2 NiO 2 layer and a 1.11-μm-thick inner LiCrO 2 layer. Based on the corrosion behaviors of Inconel 600 alloy in LiCl-KCl molten salt with different amounts of O 2- impurities, a new O 2- affected corrosion mechanism involving the formation of dual-layer oxide films and nickel-rich particles was proposed, which could provide new insights for the corrosion study in the applications of pyroprocessing of spent nuclear fuel.
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高影响因子
ChemistrySelect
·
2024
·Vol. 9
·期 13
·e202303633
·
IF 1.9
Mingyan Chen,Wentao Wang,Xinkai Feng,Dehua Zhang,Yao Zhang,Yucheng Liu
Graphical This work describes the application of a highly efficient catalyst (NH 2 -UiO-66-Mo) to the catalytic oxidation desulfurization process. NH 2 -UiO-66-Mo can greatly improve the efficiency of oxidative desulfurization The optimum operating conditions of NH 2 -UiO-66-Mo are investigated through experiments, which prove the excellent performance of the catalyst, and the reaction mechanism is further studied through a series of characterizations. A highly efficient oxidative desulfurization composite catalyst NH 2 -Uio-66-Mo has been prepared and applied in the catalytic oxidative desulfurization. It was elucidated that Mo 6+ could increase the oxygen vacancies and active sites on the catalyst and increase the pore size of UiO-66. Meanwhile, the removal rate of dibenzothiophene (DBT) reached 99.2 % after 60 min under optimal conditions and remained above 90 % after 5 cycles, showing the composite catalyst's remarkable catalytic performance and satisfactory reusability NH 2 -UiO-66-Mo. In addition, kinetic studies revealed that the desulfurization process can present a pseudo-first-order kinetic process. The apparent activation energy was 10.6 kJ/mol. Finally, in combination with oxides, possible oxidation pathways were identified.
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高影响因子
Journal of Energy Storage
·
2022
·
IF 8.907
De-Ming Zhu,Fan Bai,Yi-Nan Zhang,Ya-Nan Yang,Zhuang Sun,Jun-Wen Deng,Tao Zhang
Solid-state Li-O 2 batteries (SSLOBs) have been denoted as the holy grail in next-generation Li metal batteries for their high theoretical energy density , manipulation of ambient air to energy storage as well as high safety. However, the solid rigid interfaces both at the cathode and anode side introduce ultra-high resistances in the battery system and impede its operation under ambient temperature. Moreover, the high-reductive Li anode and semi-open cathode would cause severe side reactions during cycling which further degrade battery performance. To manage the above-mentioned issues, a rationally designed SSLOBs based on plastic crystal electrolyte is proposed in this study to enable SSLOBs operation at ambient temperature and in full charge-discharge mode. The brand-new Li-O 2 battery has been improved mainly from two aspects. First, we propose a polyacrylonitrile (PAN) modified succinonitrile (SN) electrolyte (PAN-SN) to retard the polymerization of SN and meanwhile suppress the degradation of Li ionic conductivity. Second, we propose an alternative mixed electron/ion complex conductor (MEIC) cathode to coordinate with plastic crystal electrolyte with an expanded Li-O 2 reactive zone and improved interfacial charge transfer during the charge-discharge process. The fabricated flexible SSLOBs based on PAN-SN electrolyte and MEIC cathode could be successfully fully charged-discharged (cutoff 2.0–4.5 V) for tens of cycles at ambient temperature under simulated air condition (20 vol% oxygen), with high-capacity retention of around 85 %.
研究领域:
能源存储
·
电池技术
·
材料科学
·
电化学
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高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2020
·
IF 0.936
Liang WANG,Zhang-Quan PENG
Development of lithium-oxygen (Li-O 2 ) batteries is hindered by large overpotentials, low energy efficiency and unsatisfactory cycling life, which are predominately caused by the oxygen evolution reaction (OER) involving sluggish oxidation of lithium peroxide (Li 2 O 2 ). Herein, a highly-efficient soluble redox mediator (RM) of N , N’ -Diphenyl- p -phenylenediamine (DPPD) is introduced to catalyze the oxygen evolution reaction for Li-O 2 batteries. During charging process, DPPD is electrochemically oxidized into DPPD + , which can chemically decompose Li 2 O 2 on the cathode with a much-reduced overpotential. The in-situ differential electrochemical mass spectrometry confirms that the charging process is dominated by Li 2 O 2 decomposition. With the assistance of DPPD, Li-O 2 cells can achieve lower charging potential, improved cycling stability, and prolonged lifespan (294 cycles) which is three times longer than that of tetrathiafulvalene counterpart. This work presents a credible and viable opportunity for long lifespan Li-O 2 batteries.
研究领域:
电化学
·
能源材料科学
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高影响因子
NANOTECHNOLOGY
·
2019
·Vol. 30
·期 36
·364003
·
IF 3.399
Chao Li,Yijie Liu,Bojie Li,Fan Zhang,Zhu Cheng,Ping He,Haoshen Zhou
All-solid-state Li–O2 batteries are receiving intense interest because of the substitution of solid electrolytes for toxic and flammable liquid electrolytes. However, new issues are arising in the aspect of the electrolyte cathode interface. On the one hand, in a traditional sandwiched battery structure, the reaction sites of the cathode are restricted to the finite planar electrode–electrolyte interface, resulting in limited performance of all-solid-state Li–O2 batteries. On the other hand, integrating the electrolyte with the cathode to achieve good interfacial contact often requires complex sintering processes. Herein, this work reports a solid electrolyte cathode assembly (SECA) which consists of a dense Li1.5Al0.5Ge1.5P3O12 (LAGP) layer and a carbon coated porous LAGP layer fabricated by facilely one-step sintering. As a result, Li–O2 batteries adopting the SECA showed a relatively high discharge capacity of 0.48 mAh cm−2 at 5 μA cm−2. Besides, the batteries could sustain six full cycles with a restricted capacity of 0.08 mAh cm−2 at 10 μA cm−2. It was found that the high capacity can be attributed to the high surface area of porous cathode structure.
研究领域:
材料科学
·
电化学
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高影响因子
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