Graphene Based Electrode Using in Rechargeable Lithium Ion Batteries

2013 ◽  
Vol 774-776 ◽  
pp. 640-645 ◽  
Author(s):  
Chun Xue Gao ◽  
Da Wei He ◽  
Ming Fu ◽  
Yong Sheng Wang ◽  
Jia Qi He ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Volume Changes ◽  
Graphene Nanosheet ◽  
Layered Crystals ◽  
Ion Intercalation ◽  
Modified Hummers Method

Graphene as high capacity anode materials for rechargeable lithium ion batteries (LIBs) have been studied extensively with the aim of enhancing lithium ion and electron transport, lowering the stress caused by their volume changes during the charge/discharge processes of electrodes in LIBs. As we know, graphite is a practical anode material used for LIBs, because of its capability for reversible lithium ion intercalation in the layered crystals, and the structural similarities of graphene to graphite may provide another type of intercalation anode compound. In this work, the anode electrodes of LIBs include graphene nanosheet (GNS) and graphene nanosheet + carbon nanotubes (GNS+CNT). GNS was prepared through the thermal exfoliation of oxided graphite (OGS), which was synthesized by a modified Hummers method. The specific capacity of GNS was found to be 280 mAh/g after 200 cycles at 1C, and this was increased up to 320 mAh/g by the incorporation of macromolecules of CNT to the GNS.

Graphene Oxide-Induced Carbon Nanoporous Framework towards Advanced Composite Anode Material for Lithium-Ion Batteries

2021 ◽  
pp. 1-17
Author(s):  
Guangfeng Shi ◽  
Jiale Zhou ◽  
Rong Zeng ◽  
Bing Na ◽  
Shufen Zou
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Anode Materials ◽  
Specific Capacity ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Composite Anode ◽  
Advanced Composite

Abstract Porous structures in anode materials are of importance to accommodate volume dilation of active matters. In the present case, a carbon nanoporous framework is hydrothermally synthesized from glucose in the presence of graphene oxide (GO), together with in situ active Fe3O4 nanoparticles within it. The composite anode material has outstanding electrochemical performance, including high specific capacity, excellent cyclic stability and superior rate capability. The specific capacity stays at 830.8 mAhg−1 after 200 cycles at 1 A/g, equivalent to a high capacity retention of 88.7%. The findings provide valuable clues to tailor morphology of hydrothermally carbonized glucose for advanced composite anode materials of lithium-ion batteries.

scholarly journals The Effect of Annealing Temperature on the Synthesis of Nickel Ferrite Films as High-Capacity Anode Materials for Lithium Ion Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 3238
Author(s):  
Mansoo Choi ◽  
Sung-Joo Shim ◽  
Yang-Il Jung ◽  
Hyun-Soo Kim ◽  
Bum-Kyoung Seo
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Cycling Performance ◽  
High Specific Capacity ◽  
High Discharge Capacity ◽  
Lower Temperature ◽  
Libs Applications

Anode materials providing a high specific capacity with a high cycling performance are one of the key parameters for lithium ion batteries’ (LIBs) applications. Herein, a high-capacity NiFe2O4(NFO) film anode is prepared by E-beam evaporation, and the effect of the heat treatment is studied on the microstructure and electrochemical properties of LIBs. The NiFe2O4 film annealed at 800 °C (NFO-800) showed a highly crystallized structure and different surface morphologies when compared to the electrode annealed at a lower temperature (NFO-600, NFO-700). In the electrochemical measurements, the high specific capacity (1804 mA g−1) and capacity retention ratio (95%) after 100 cycles were also achieved by the NFO-800 electrode. The main reason for the good electrochemical performance of the NFO-800 electrode is a high structure integrity, which could improve the cycle stability with a high discharge capacity. The NiFe2O4 electrode with an annealing process could be further proposed as an alternative ferrite material.

scholarly journals Improvement of long-term cycling performance of high-nickel cathode materials by ZnO coating

2021 ◽  
Vol 10 (1) ◽  
pp. 210-220
Author(s):  
Fangfang Wang ◽  
Ruoyu Hong ◽  
Xuesong Lu ◽  
Huiyong Liu ◽  
Yuan Zhu ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Solid Phase ◽  
Low Cost ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Side Reaction ◽  
Chemical Route ◽  
High Nickel

Abstract The high-nickel cathode material of LiNi0.8Co0.15Al0.05O2 (LNCA) has a prospective application for lithium-ion batteries due to the high capacity and low cost. However, the side reaction between the electrolyte and the electrode seriously affects the cycling stability of lithium-ion batteries. In this work, Ni2+ preoxidation and the optimization of calcination temperature were carried out to reduce the cation mixing of LNCA, and solid-phase Al-doping improved the uniformity of element distribution and the orderliness of the layered structure. In addition, the surface of LNCA was homogeneously modified with ZnO coating by a facile wet-chemical route. Compared to the pristine LNCA, the optimized ZnO-coated LNCA showed excellent electrochemical performance with the first discharge-specific capacity of 187.5 mA h g−1, and the capacity retention of 91.3% at 0.2C after 100 cycles. The experiment demonstrated that the improved electrochemical performance of ZnO-coated LNCA is assigned to the surface coating of ZnO which protects LNCA from being corroded by the electrolyte during cycling.

Large-scale and low cost synthesis of graphene as high capacity anode materials for lithium-ion batteries

Carbon ◽  
2013 ◽  
Vol 64 ◽  
pp. 158-169 ◽  
Author(s):  
Shuangqiang Chen ◽  
Peite Bao ◽  
Linda Xiao ◽  
Guoxiu Wang
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Large Scale ◽  
Low Cost ◽  
High Capacity ◽  
Lithium Ion

Research Progress and Application of Modified Silicon-Based Anode Materials for Lithium-Ion Batteries

2021 ◽  
Vol 1036 ◽  
pp. 35-44
Author(s):  
Ling Fang Ruan ◽  
Jia Wei Wang ◽  
Shao Ming Ying
Keyword(s):  
Electrochemical Performance ◽  
Lithium Ion Batteries ◽  
Volume Expansion ◽  
Anode Materials ◽  
Active Material ◽  
Three Dimensional ◽  
Lithium Ion ◽  
Research Progress ◽  
Ion Intercalation ◽  
Silicon Based

Silicon-based anode materials have been widely discussed by researchers because of its high theoretical capacity, abundant resources and low working voltage platform,which has been considered to be the most promising anode materials for lithium-ion batteries. However,there are some problems existing in the silicon-based anode materials greatly limit its wide application: during the process of charge/discharge, the materials are prone to about 300% volume expansion, which will resultin huge stress-strain and crushing or collapse on the anods; in the process of lithium removal, there is some reaction between active material and current collector, which creat an increase in the thickness of the solid phase electrolytic layer(SEI film); during charging and discharging, with the increase of cycle times, cracks will appear on the surface of silicon-based anode materials, which will cause the batteries life to decline. In order to solve these problems, firstly, we summarize the design of porous structure of nanometer sized silicon-based materials and focus on the construction of three-dimensional structural silicon-based materials, which using natural biomass, nanoporous carbon and metal organic framework as structural template. The three-dimensional structure not only increases the channel of lithium-ion intercalation and the rate of ion intercalation, but also makes the structure more stable than one-dimensional or two-dimensional. Secondly, the Si/C composite, SiOx composite and alloying treatment can improve the volume expansion effection, increase the rate of lithium-ion deblocking and optimize the electrochemical performance of the material. The composite materials are usually coated with elastic conductive materials on the surface to reduce the stress, increase the conductivity and improve the electrochemical performance. Finally, the future research direction of silicon-based anode materials is prospected.

Cu2O Nanoparticles and Multi-Branched Nanowires as Anodes for Lithium-Ion Batteries

NANO ◽  
2018 ◽  
Vol 13 (09) ◽  
pp. 1850103 ◽  
Author(s):  
Xu Chen ◽  
Chunxin Yu ◽  
Xiaojiao Guo ◽  
Qinsong Bi ◽  
Muhammad Sajjad ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Hydrothermal Process ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Discharge Process ◽  
Electrochemical Cycling ◽  
One Step ◽  
Cu2o Nanoparticles ◽  
Enhanced Electrochemical Performance

Novelty Cu2O multi-branched nanowires and nanoparticles with size ranging from [Formula: see text]15[Formula: see text]nm to [Formula: see text]60[Formula: see text]nm have been synthesized by one-step hydrothermal process. These Cu2O nanostructures when used as anode materials for lithium-ion batteries exhibit the excellent electrochemical cycling stability and reduced polarization during the repeated charge/discharge process. The specific capacity of the Cu2O nanoparticles, multi-branched nanowires and microscale are maintained at 201.2[Formula: see text]mAh/g, 259.6[Formula: see text]mAh/g and 127.4[Formula: see text]mAh/g, respectively, under the current density of 0.1[Formula: see text]A/g after 50 cycles. The enhanced electrochemical performance of the Cu2O nanostructures compared with microscale counterpart can be attributed to the larger contact area between active Cu2O nanostructures/electrolyte interface, shorter diffusion length of Li[Formula: see text] within nanostructures and the improved stress release upon lithiation/delithiation.

Two-dimensional SnS2@PANI nanoplates with high capacity and excellent stability for lithium-ion batteries

2015 ◽  
Vol 3 (7) ◽  
pp. 3659-3666 ◽  
Author(s):  
Gang Wang ◽  
Jun Peng ◽  
Lili Zhang ◽  
Jun Zhang ◽  
Bin Dai ◽  
...  
Keyword(s):  
Electron Transport ◽  
Lithium Ion Batteries ◽  
Electrode Materials ◽  
High Capacity ◽  
Lithium Ion ◽  
Two Dimensional ◽  
Volume Changes ◽  
Nanostructured Electrode ◽  
Charge Discharge ◽  
Excellent Stability

Nanostructured electrode materials have been extensively studied with the aim of enhancing lithium ion and electron transport and lowering the stress caused by their volume changes during the charge–discharge processes of electrodes in lithium-ion batteries.

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