Hierarchical three-dimensional MnO nanorods/carbon anodes for ultralong-life lithium-ion batteries

2016 ◽  
Vol 4 (43) ◽  
pp. 16936-16945 ◽  
Author(s):  
Wei Zhang ◽  
Jinzhi Sheng ◽  
Jie Zhang ◽  
Ting He ◽  
Lin Hu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Current Density ◽  
Three Dimensional ◽  
Size Variation ◽  
Lithium Ion ◽  
Capacity Retention ◽  
Carbon Anodes ◽  
Carbon Network ◽  
A Current

N-Doped carbon network encapsulated MnO nanorods demonstrate 95% capacity retention at a current density of 4000 mA g−1for 3000 cycles. In this case, almost no pulverization or size variation of the nanorods can be observed.

PREPARATION OF THREE-DIMENSIONAL GRAPHENE NETWORKS FOR USE AS ANODE OF LITHIUM ION BATTERIES

2013 ◽  
Vol 06 (06) ◽  
pp. 1350063 ◽  
Author(s):  
HAI LI ◽  
CHUNXIANG LU
Keyword(s):  
Lithium Ion Batteries ◽  
Current Density ◽  
Graphene Nanosheets ◽  
Three Dimensional ◽  
Rate Capability ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
3D Graphene ◽  
Potential Applications ◽  
A Current

The three-dimensional (3D) graphene networks have been prepared by annealing the mixture of graphene oxide and SiO 2 nanoparticles and then etching SiO 2. The obtained material was characterized by X-ray diffraction, scanning electron microscope and transmission electron microscopy, which revealed that 3D networks consisting of crumpled graphene nanosheets were preserved after the removal of SiO 2. When used as anode material of lithium ion batteries, the graphene networks showed a reversible capacity of 610.9 mAh/g at a current density of 50 mA/g after 50 cycles and excellent rate capability of 291.5 mAh/g at a current density of 5000 mA/g. The good electrochemical performance can be attributed to the network structure, which enables graphene to electrochemically absorb more lithium ions and significantly improve the electrical conductivity of electrode. The graphene networks have the potential applications in ultracapacitor and catalyst supports.

Highly stable cycling of a lead oxide/copper nanocomposite as an anode material in lithium ion batteries

RSC Advances ◽  
2015 ◽  
Vol 5 (62) ◽  
pp. 50245-50252 ◽  
Author(s):  
Cheng-Hung Li ◽  
Prakash Sengodu ◽  
Di-Yan Wang ◽  
Tsung-Rong Kuo ◽  
Chia-Chun Chen
Keyword(s):  
Heat Treatment ◽  
Lithium Ion Batteries ◽  
Current Density ◽  
Solvothermal Synthesis ◽  
Lead Oxide ◽  
Lithium Battery ◽  
Lithium Ion ◽  
Capacity Retention ◽  
A Current

Nanostructure composites of PbO/Cu–C were synthesized byin situsolvothermal synthesis and heat treatment of PbO/Cu with PVP, used as lithium battery anodes. It exhibits >90% capacity retention after 9500 cycles at a current density of 5.5 A g−1.

scholarly journals Waterborne polyurethane as a carbon coating for micrometre-sized silicon-based lithium-ion battery anode material

2018 ◽  
Vol 5 (8) ◽  
pp. 180311 ◽  
Author(s):  
Chunfeng Yan ◽  
Tao Huang ◽  
Xiangzhen Zheng ◽  
Cuiran Gong ◽  
Maoxiang Wu
Keyword(s):  
Carbon Coating ◽  
Lithium Ion ◽  
Waterborne Polyurethane ◽  
Cycling Performance ◽  
Capacity Retention ◽  
Lithium Ions ◽  
Rate Capacity ◽  
Silicon Based ◽  
Carbon Network ◽  
A Current

Waterborne polyurethane (WPU) is first used as a carbon-coating source for micrometre-sized silicon. The remaining nitrogen (N) and oxygen (O) heteroatoms during pyrolysis of the WPU interact with the surface oxide on the silicon (Si) particles via hydrogen bonding (Si–OH⋯N and Si–OH⋯O). The N and O atoms involved in the carbon network can interact with the lithium ions, which is conducive to lithium-ion insertion. A satisfactory performance of the Si@N, O-doped carbon (Si@CNO) anode is gained at 25 and 55°C. The Si@CNO anode shows stable cycling performance (capacity retention of 70.0% over 100 cycles at 25°C and 60.3% over 90 cycles at 55°C with a current density of 500 mA g −1 ) and a superior rate capacity of 864.1 mA h g −1 at 1000 mA g −1 (25°C). The improved electrochemical performance of the Si@CNO electrode is attributed to the enhanced electrical conductivity and structural stability.

High Reversible Capacity of Nitrogen-Doped Graphene as an Anode Material for Lithium-Ion Batteries

2014 ◽  
Vol 1070-1072 ◽  
pp. 459-464
Author(s):  
Chang Jing Fu ◽  
Shuang Li ◽  
Qian Wang
Keyword(s):  
Graphene Oxide ◽  
Electron Microscope ◽  
Lithium Ion Batteries ◽  
Current Density ◽  
Lithium Ion ◽  
X Ray ◽  
Nitrogen Doped ◽  
Nitrogen Doped Graphene ◽  
Doped Graphene ◽  
A Current

Nitrogen-doped graphene (N-rGO) was synthesized in the process of preparation of reduced graphene oxide from the expanded graphite through the improved Hummers’ method. The morphology, structure and composition of nitrogen-doped graphene oxide (GO) and N-rGO were characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The nitrogen content of N-rGO was approximately 5 at.%. The electrochemical performances of N-rGO as anode materials for lithium-ion batteries were evaluated in coin-type cells versus metallic lithium. Results showed that the obtained N-rGO exhibited a higher reversible specific capacity of 519 mAh g-1 at a current density of 100 mA⋅g-1 and 207.5 mAh⋅g-1 at a current density of 2000 mA⋅g-1. The excellent cycling stability and high-rate capability of N-rGO as anodes of lithium-ion battery were attributed to the large number of surface defects caused by the nitrogen doping, which facilitates the fast transport of Li-ion and electron on the interface of electrolyte/electrode.

scholarly journals Polypyrrole Coated Mn–Fe Bimetallic Oxides as High Stability Anode for Lithium-ion Batteries

2021 ◽  
Author(s):  
Yuan Fang ◽  
Tengfei Li ◽  
Fen Wang ◽  
Jianfeng Zhu
Keyword(s):  
Metal Oxides ◽  
Lithium Ion Batteries ◽  
Volume Change ◽  
Current Density ◽  
Transition Metal Oxides ◽  
High Stability ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Specific Capacity ◽  
A Current

Abstract Transition metal oxides as anode materials have received extensive research owing to the high specific capacity. Whereas, the rapid decline of battery capacity caused by volume expansion and low electrical conductivity hinders the practical application of transition metal oxides. This study reported a pseudo-capacitance material polypyrrole coated Fe2O3/Mn2O3 composites material as a high stability anode for lithium-ion batteries. The polypyrrole coating layer can not only serve as a conductive network to improve electrode conductivity but also can be used as a protective buffer layer to suppress the volume change of Fe2O3/Mn2O3 during the charging and discharging process. At the same time, the porous structure of Fe2O3/Mn2O3 composite can not only provide more active sites for lithium storage but also play a certain buffer effect on the volume change of the material. Polypyrrole-coated Fe2O3/Mn2O3 composite as the anode for lithium-ion batteries shows great electrochemical storage performance, with high specific capacity (627 mAh g− 1 at a current density of 1A g− 1), great cycle stability (the capacity not shows obvious signs of attenuation after 500 cycles) and rate performance (432 mAh g− 1 at a current density of 2.0 A g− 1).

A 3D pore-nest structured silicon–carbon composite as an anode material for high performance lithium-ion batteries

2017 ◽  
Vol 4 (12) ◽  
pp. 1996-2004 ◽  
Author(s):  
Yankai Li ◽  
Zhi Long ◽  
Pengyuan Xu ◽  
Yang Sun ◽  
Kai Song ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Current Density ◽  
High Performance ◽  
Lithium Ion ◽  
Carbon Composite ◽  
Nest Structure ◽  
Composite Anode ◽  
Silicon Carbon ◽  
A Current

A novel silicon–carbon composite with a 3D pore-nest structure denoted as Si@SiOx/CNTs@C was prepared and studied, and the capacity of a Si@SiOx/CNTs@C composite anode can be maintained at above 1740 mA h g−1 at a current density of 0.42 A g−1 after 700 cycles.

Electrode Properties of Defect-Introduced Graphenes for Lithium-Ion Batteries

2013 ◽  
Vol 582 ◽  
pp. 103-106
Author(s):  
Wonk Yun Lee ◽  
Shinya Suzuki ◽  
Masaru Miyayama
Keyword(s):  
Lithium Ion Batteries ◽  
Current Density ◽  
Lithium Ion ◽  
Graphene Sheets ◽  
Oxidizing Agent ◽  
Lithium Storage ◽  
Charge Capacity ◽  
Oxidized Graphite ◽  
A Current ◽  
Graphite Oxides

Electrochemical properties of defect-introduces graphenes for lithium ion batteries were investigated. Graphene sheets (GSs) were prepared from graphite through treating with oxidizing agent followed by rapid thermal exfoliation. Defect concentration was controlled by selecting the number of times of oxidation of graphite. GSs electrodes derived from 1, 2 and 3 times-oxidized graphite oxides exhibited a high charge capacity of 1250, 1790 and 2310 mAh g1, respectively, at the 20th cycle at a current density of 100 mA g1. The enhanced capacity is assumed to be due to additional lithium storage sites such as defects and edges.

scholarly journals Cobalt Sulfide Confined in N-Doped Porous Branched Carbon Nanotubes for Lithium-Ion Batteries

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Yongsheng Zhou ◽  
Yingchun Zhu ◽  
Bingshe Xu ◽  
Xueji Zhang ◽  
Khalid A. Al-Ghanim ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Lithium Ion Batteries ◽  
Current Density ◽  
Large Scale ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Cobalt Sulfide ◽  
Energy Storage Devices ◽  
A Current

Abstract Lithium-ion batteries (LIBs) are considered new generation of large-scale energy-storage devices. However, LIBs suffer from a lack of desirable anode materials with excellent specific capacity and cycling stability. In this work, we design a novel hierarchical structure constructed by encapsulating cobalt sulfide nanowires within nitrogen-doped porous branched carbon nanotubes (NBNTs) for LIBs. The unique hierarchical Co9S8@NBNT electrode displayed a reversible specific capacity of 1310 mAh g−1 at a current density of 0.1 A g−1, and was able to maintain a stable reversible discharge capacity of 1109 mAh g−1 at a current density of 0.5 A g−1 with coulombic efficiency reaching almost 100% for 200 cycles. The excellent rate and cycling capabilities can be ascribed to the hierarchical porosity of the one-dimensional Co9S8@NBNT internetworks, the incorporation of nitrogen doping, and the carbon nanotube confinement of the active cobalt sulfide nanowires offering a proximate electron pathway for the isolated nanoparticles and shielding of the cobalt sulfide nanowires from pulverization over long cycling periods.

scholarly journals Implanting MnO into a three-dimensional carbon network as superior anode materials for lithium-ion batteries

2021 ◽  
pp. 100146
Author(s):  
Zheng Liu ◽  
Xiaodan Wang ◽  
Fengyu Lai ◽  
Chao Wang ◽  
Nan Yu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Carbon Network
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