scholarly journals Comparison of Thermally Grown Carbon Nanofiber‐Based and Reduced Graphene Oxide‐Based CMOS‐Compatible Microsupercapacitors

2020 ◽  
pp. 2000358
Author(s):  
Agin Vyas ◽  
Simin Zare Hajibagher ◽  
Qi Li ◽  
Mazharul Haque ◽  
Anderson Smith ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Carbon Nanofiber ◽  
Reduced Graphene ◽  
Cmos Compatible ◽  
Thermally Grown

Effects of the composition of reduced graphene oxide/carbon nanofiber nanocomposite on charge storage behaviors

2019 ◽  
Vol 178 ◽  
pp. 107500 ◽  
Author(s):  
Tolendra Kshetri ◽  
Duy Thanh Tran ◽  
Thangjam Ibomcha Singh ◽  
Nam Hoon Kim ◽  
Kin-tak Lau ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Carbon Nanofiber ◽  
Charge Storage ◽  
Reduced Graphene

Room temperature photoluminescent study of thermally grown reduced graphene oxide quantum dots

2021 ◽  
pp. 109164
Author(s):  
Javied Hamid Malik ◽  
Khurshaid Ahmad Malik ◽  
Insaaf Assadullah ◽  
Aadil Ahmad Bhat ◽  
Arvind Dandotia ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Room Temperature ◽  
Reduced Graphene ◽  
Graphene Oxide Quantum Dots ◽  
Thermally Grown

scholarly journals Reduced Graphene-Oxide-Encapsulated MoS2/Carbon Nanofiber Composite Electrode for High-Performance Na-Ion Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2691
Author(s):  
Su-Ho Cho ◽  
Jong-Heon Kim ◽  
Il-Gyu Kim ◽  
Jeong-Ho Park ◽  
Ji-Won Jung ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Anode Materials ◽  
High Performance ◽  
Carbon Nanofiber ◽  
Electronic Conductivity ◽  
High Capacity ◽  
Lithium Ion ◽  
Molybdenum Sulfide ◽  
Reduced Graphene

Sodium-ion batteries (SIBs) have been increasingly studied due to sodium (Na) being an inexpensive ionic resource (Na) and their battery chemistry being similar to that of current lithium-ion batteries (LIBs). However, SIBs have faced substantial challenges in developing high-performance anode materials that can reversibly store Na+ in the host structure. To address these challenges, molybdenum sulfide (MoS2)-based active materials have been considered as promising anodes, owing to the two-dimensional layered structure of MoS2 for stably (de)inserting Na+. Nevertheless, intrinsic issues of MoS2—such as low electronic conductivity and the loss of active S elements after a conversion reaction—have limited the viability of MoS2 in practical SIBs. Here, we report MoS2 embedded in carbon nanofibers encapsulated with a reduced graphene oxide (MoS2@CNFs@rGO) composite for SIB anodes. The MoS2@CNFs@rGO delivered a high capacity of 345.8 mAh g−1 at a current density of 100 mA g−1 for 90 cycles. The CNFs and rGO were synergistically taken into account for providing rapid pathways for electrons and preventing the dissolution of S sources during repetitive conversion reactions. This work offers a new point of view to realize MoS2-based anode materials in practical SIBs.

scholarly journals Synthesis and Electrochemical Performance of Electrostatic Self-Assembled Nano-Silicon@N-Doped Reduced Graphene Oxide/Carbon Nanofibers Composite as Anode Material for Lithium-Ion Batteries

Molecules ◽  
2021 ◽  
Vol 26 (16) ◽  
pp. 4831
Author(s):  
Ruye Cong ◽  
Hyun-Ho Park ◽  
Minsang Jo ◽  
Hochun Lee ◽  
Chang-Seop Lee
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Batteries ◽  
Reduced Graphene Oxide ◽  
Silicon Nanoparticles ◽  
Carbon Nanofiber ◽  
Specific Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Electrode Structure ◽  
Reduced Graphene

Silicon-carbon nanocomposite materials are widely adopted in the anode of lithium-ion batteries (LIB). However, the lithium ion (Li+) transportation is hampered due to the significant accumulation of silicon nanoparticles (Si) and the change in their volume, which leads to decreased battery performance. In an attempt to optimize the electrode structure, we report on a self-assembly synthesis of silicon nanoparticles@nitrogen-doped reduced graphene oxide/carbon nanofiber (Si@N-doped rGO/CNF) composites as potential high-performance anodes for LIB through electrostatic attraction. A large number of vacancies or defects on the graphite plane are generated by N atoms, thus providing transmission channels for Li+ and improving the conductivity of the electrode. CNF can maintain the stability of the electrode structure and prevent Si from falling off the electrode. The three-dimensional composite structure of Si, N-doped rGO, and CNF can effectively buffer the volume changes of Si, form a stable solid electrolyte interface (SEI), and shorten the transmission distance of Li+ and the electrons, while also providing high conductivity and mechanical stability to the electrode. The Si@N-doped rGO/CNF electrode outperforms the Si@N-doped rGO and Si/rGO/CNF electrodes in cycle performance and rate capability, with a reversible specific capacity reaching 1276.8 mAh/g after 100 cycles and a Coulomb efficiency of 99%.

scholarly journals Synthesis and Electrochemical Performance of Electrostatic Self-Assembled Nano-Silicon@N-Doped Reduced Graphene Oxide/Carbon Nanofibers Composite as Anode Material for Lithium-Ion Batteries

2021 ◽  
Author(s):  
Ruye Cong ◽  
Hyun-Ho Park ◽  
Minsang Jo ◽  
Hochun Lee ◽  
Chang-Seop Lee
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Batteries ◽  
Reduced Graphene Oxide ◽  
Silicon Nanoparticles ◽  
Composite Electrode ◽  
Carbon Nanofiber ◽  
Specific Capacity ◽  
Lithium Ion ◽  
Lithium Ions ◽  
Reduced Graphene

We report a self-assembly synthesis of silicon nanoparticles/nitrogen-doped reduced graphene oxide/ carbon nanofiber (Si@N-doped rGO/CNF) composites as potential high-performance anodes for rechargeable lithium-ion batteries (LIB) through the electrostatic attraction between amino and carboxyl groups. Nitrogen atoms generate a large number of vacancies or defects on the graphite plane, providing additional transmission channels for the diffusion of lithium ions, and improving the conductivity of the electrode. Carbon nanofiber (CNF) can help maintain the stability of the electrode structure and prevent silicon nanoparticles from falling off the electrode, prevent silicon nanoparticles from being directly exposed to the electrolyte, and can form a stable solid electrolyte interface (SEI) film. The three-dimensional conductive structure composed of Si, nitrogen atom-doped reduced graphene oxide (N-doped rGO), and CNF can effectively buffer the volume changes of silicon nanoparticles, shorten the transmission distance of lithium ions (Li+) and electrons, and make the electrode have good conductivity and stability in mechanical properties. In addition, compared with the Si@N-doped rGO and Si/rGO/CNF composite electrode, the Si@N-doped rGO/CNF composite electrode shows good cycle performance and rate capability, and its reversible specific capacity can reach 1418.8 mAh/g. The capacity retention rate is 64.7%, and the coulomb efficiency is 95%.

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