The Si@C‐Network Electrode Prepared by an In Situ Carbonization Strategy with Enhanced Cycle Performance

2020 ◽  
Vol 7 (24) ◽  
pp. 4999-5004
Author(s):  
Li Deng ◽  
Zhan‐Yu Wu ◽  
Jin‐Hai You ◽  
Zu‐Wei Yin ◽  
Wen‐Feng Ren ◽  
...  
Keyword(s):  
Cycle Performance ◽  
In Situ Carbonization

scholarly journals In-situ synthesis of Fe2O3/rGO using different hydrothermal methods as anode materials for lithium-ion batteries

2020 ◽  
Vol 59 (1) ◽  
pp. 477-487 ◽  
Author(s):  
Zhuang Liu ◽  
Haiyang Fu ◽  
Bo Gao ◽  
Yixuan Wang ◽  
Kui Li ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Oleic Acid ◽  
Lithium Ion Batteries ◽  
Reduced Graphene Oxide ◽  
Anode Materials ◽  
Lithium Ion ◽  
In Situ Synthesis ◽  
Cycle Performance ◽  
Reduced Graphene

AbstractThis paper studies in-situ synthesis of Fe2O3/reduced graphene oxide (rGO) anode materials by different hydrothermal process.Scanning Electron Microscopy (SEM) analysis has found that different processes can control the morphology of graphene and Fe2O3. The morphologies of Fe2O3 prepared by the hydrothermal in-situ and oleic acid-assisted hydrothermal in-situ methods are mainly composed of fine spheres, while PVP assists The thermal in-situ law presents porous ellipsoids. Graphene exhibits typical folds and small lumps. X-ray diffraction analysis (XRD) analysis results show that Fe2O3/reduced graphene oxide (rGO) is generated in different ways. Also, the material has good crystallinity, and the crystal form of the iron oxide has not been changed after adding GO. It has been reduced, and a characteristic peak appears around 25°, indicating that a large amount of reduced graphene exists. The results of the electrochemical performance tests have found that the active materials prepared in different processes have different effects on the cycle performance of lithium ion batteries. By comprehensive comparison for these three processes, the electro-chemical performance of the Fe2O3/rGO prepared by the oleic acid-assisted hydrothermal method is best.

Photocatalytic hydrogen evolution on CdS–based composites derived from in situ carbonization of a sulfonic azo dye complex

2021 ◽  
Vol 125 ◽  
pp. 108370
Author(s):  
Jun–Tao Wang ◽  
Gui–Fang Liu ◽  
Kai Yu ◽  
Jian–Ying Xu ◽  
Heng–Xin Liu ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Azo Dye ◽  
Photocatalytic Hydrogen Evolution ◽  
In Situ Carbonization

scholarly journals In situ surface-enhanced Raman spectroelectrochemistry reveals the molecular conformation of electrolyte additives in Li-ion batteries

2021 ◽  
Author(s):  
Chenbo Zhu ◽  
Chenghao Fan ◽  
Emiliano Cortes ◽  
Wei Xie
Keyword(s):  
Molecular Conformation ◽  
Rate Capability ◽  
Cycle Performance ◽  
Li Ion Batteries ◽  
Electrolyte Additive ◽  
Electrolyte Additives ◽  
Surface Enhanced ◽  
Surface Enhanced Raman ◽  
Li Ion

We report on the mechanism of rhodamine B (RhB) acting as an electrolyte additive in Li/graphite cells. We show that cycle performance and rate capability of graphite is enhanced in...

scholarly journals The synthesis of highly active carbon dot-coated gold nanoparticles via the room-temperature in situ carbonization of organic ligands for 4-nitrophenol reduction

RSC Advances ◽  
2020 ◽  
Vol 10 (33) ◽  
pp. 19419-19424
Author(s):  
Yue Zhu ◽  
Juan Du ◽  
Qianqian Peng ◽  
Fengyi Wang ◽  
Jing Hu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Active Carbon ◽  
Room Temperature ◽  
Organic Ligands ◽  
Carbon Dot ◽  
Highly Active ◽  
Nitrophenol Reduction ◽  
In Situ Carbonization

Due to the serious pollution issue caused by 4-nitrophenol (4-NP), it is of great importance to design effective catalysts for its reduction.

In situ carbonization of a soft-template to directly synthesize crystalline mesoporous metal oxides with high surface areas

2014 ◽  
Vol 38 (12) ◽  
pp. 5846-5855 ◽  
Author(s):  
Limin Guo ◽  
Shintaro Ida ◽  
Takashi Daio ◽  
Hidehisa Hagiwara ◽  
Tatsumi Ishihara
Keyword(s):  
High Surface ◽  
Tantalum Oxide ◽  
High Surface Area ◽  
Soft Template ◽  
Block Polymer ◽  
Surface Areas ◽  
Mesoporous Metal Oxides ◽  
Mesoporous Metal ◽  
In Situ Carbonization

High-surface-area crystalline mesoporous tantalum oxide has been successfully synthesized using a pluronic tri-block polymer as the template.

scholarly journals The Influence of Micro-Structured Anode Current Collectors in Combination with Highly Concentrated Electrolyte on the Coulombic Efficiency of In-Situ Deposited Li-Metal Electrodes with Different Counter Electrodes

Batteries ◽  
2020 ◽  
Vol 6 (1) ◽  
pp. 20 ◽  
Author(s):  
Fabian Heim ◽  
Tina Kreher ◽  
Kai Peter Birke
Keyword(s):  
Coulombic Efficiency ◽  
Chemical Separation ◽  
Current Collector ◽  
Cycle Performance ◽  
Zinc Alloy ◽  
Counter Electrodes ◽  
Current Collectors ◽  
Copper Zinc ◽  
Two Measures

This paper compares and combines two common methods to improve the cycle performance of lithium metal (Li) electrodes. One technique is to establish a micro-structured current collector by chemical separation of a copper/zinc alloy. Furthermore, the use of a highly concentrated ether-based electrolyte is applied as a second approach for improving the cycling behavior. The influence of the two measures compared with a planar current collector and a 1 M concentrated carbonate-based electrolyte, as well as the combination of the methods, are investigated in test cells both with Li and lithium nickel cobalt manganese oxide (NCM) as counter electrodes. In all cases Li is in-situ plated onto the micro-structured current collectors respectively a planar copper foil without presence of any excess Li before first deposition. In experiments with Li counter electrodes, the effect of a structured current collector is not visible whereas the influence of the electrolyte can be observed. With NCM counter electrodes and carbonate-based electrolyte structured current collectors can improve Coulombic efficiency. The confirmation of this outcome in experiments with highly concentrated ether-based electrolyte is challenging due to high deviations. However, these results indicate, that improvements in Coulombic efficiency achieved by structuring the current collector’s surface and using ether-based electrolyte do not necessarily add up, if both methods are combined in one cell.

In situ topotactic synthesis of a porous network Zn2Ti3O8 platelike nanoarchitecture and its long-term cycle performance for a LIB anode

CrystEngComm ◽  
2018 ◽  
Vol 20 (45) ◽  
pp. 7329-7336 ◽  
Author(s):  
Xingang Kong ◽  
Xing Wang ◽  
Dingying Ma ◽  
Jianfeng Huang ◽  
Jiayin Li ◽  
...  
Keyword(s):  
Ion Exchange ◽  
Exchange Reaction ◽  
Current Density ◽  
Cycle Performance ◽  
Porous Network ◽  
Ion Exchange Reaction ◽  
Topotactic Transformation ◽  
A Current

Porous network Zn2Ti3O8 platelike nanoarchitecture was prepared by an ion exchange reaction and further in situ topotactic transformation, and it exhibited an enhanced reversibility capacity of 408 mA h g−1 after 1000 cycles at a current density of 1 Ag−1.

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