Green synthesis of GeO2/graphene composites as anode material for lithium-ion batteries with high capacity

RSC Advances ◽  
2016 ◽  
Vol 6 (90) ◽  
pp. 87440-87445 ◽  
Author(s):  
Wei Wei ◽  
Aihua Tian ◽  
Fangfang Jia ◽  
Kefeng Wang ◽  
Peng Qu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Green Synthesis ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Graphene Nanosheets ◽  
High Capacity ◽  
Lithium Ion ◽  
Graphene Composite ◽  
Solution Route ◽  
Green Solution

A facile green solution route using only GeO2 powder, graphene oxide and purified water has been developed to prepare a GeO2/graphene composite, in which the GeO2 particles are wrapped in graphene nanosheets.

scholarly journals Synergistic Effect of a Defect-Free Graphene Nanostructure as an Anode Material for Lithium Ion Batteries

Nanomaterials ◽  
2019 ◽  
Vol 10 (1) ◽  
pp. 9 ◽  
Author(s):  
Kwang Hyun Park ◽  
Byung Gon Kim ◽  
Sung Ho Song
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
Graphene Nanosheets ◽  
Rate Capability ◽  
Intercalation Compound ◽  
Lithium Ion ◽  
Intrinsic Property ◽  
Power Performance ◽  
Graphene Nanostructure

Graphene nanosheets have been among the most promising candidates for a high-performance anode material to replace graphite in lithium ion batteries (LIBs). Studies in this area have mainly focused on nanostructured electrodes synthesized by graphene oxide (GO) or reduced graphene oxide (rGO) and surface modifications by a chemical treatment. Herein, we propose a cost-effective and reliable route for generating a defect-free, nanoporous graphene nanostructure (df-GNS) through the sequential insertion of pyridine into a potassium graphite intercalation compound (K-GIC). The as-prepared df-GNS preserves the intrinsic property of graphene without any crystal damage, leading to micro-/nano-porosity (microporosity: ~10–50 µm, nanoporosity: ~2–20 nm) with a significantly large specific surface area. The electrochemical performance of the df-GNS as an anode electrode was assessed and showed a notably enhanced capacity, rate capability, and cycle stability, without fading in capacity or decaying. This is because of the optimal porosity, with perfect preservation of the graphene crystal, allowing faster ion access and a high amount of electron pathways onto the electrode. Therefore, our work will be very helpful for the development of anode and cathode electrodes with higher energy and power performance requirements.

Facile fabrication of graphene-encapsulated Mn3O4 octahedra cross-linked with a silver network as a high-capacity anode material for lithium ion batteries

2017 ◽  
Vol 41 (22) ◽  
pp. 13454-13461 ◽  
Author(s):  
Binbin Liu ◽  
Lei Qi ◽  
Jiajia Ye ◽  
Jieqiang Wang ◽  
Caixia Xu
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Graphene Nanosheets ◽  
High Capacity ◽  
Lithium Ion ◽  
Conductive Network ◽  
Facile Fabrication ◽  
Li Storage

Mn3O4 octahedra with a bimodal conductive network of nanoporous Ag and graphene nanosheets are simply prepared for better Li storage as an advanced anode material.

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.

Graphite/graphene oxide composite as high capacity and binder-free anode material for lithium ion batteries

2013 ◽  
Vol 241 ◽  
pp. 619-626 ◽  
Author(s):  
Jingxian Zhang ◽  
Huaqiang Cao ◽  
Xiaolin Tang ◽  
Weifeng Fan ◽  
Gongchang Peng ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Batteries ◽  
Anode Material ◽  
High Capacity ◽  
Lithium Ion ◽  
Oxide Composite ◽  
Binder Free
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