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Three
2019/3/8Hybrid MoS2/reduced graphene aerogels with rich micro-pore are fabricated through a hydrothermal method, followed by freeze-drying and annealing treatment. The porous structure could act as an electrode directly, free of binder and conductive agent, which promotes an improved electron transfer, and provides a 3D network for an enhanced ion transport, thus leading to an increased
Porous Graphene Materials for Energy Storage and
2015/11/23Porous graphene hybrids can also be produced by thermally treating a mixture of graphene and porous components [48–55]. Rui et al. [ 48 ] produced a V 2 O 5 /rGO composite by thermal pyrolysis of a hybrid of vanadium oxide (VO) and rGO at the temperature of 350C for 30 min under a heating rate of 10C/min in air.
Unprecedented and highly stable lithium storage capacity
Herein, we report a (001) faceted nanosheet-constructed hierarchically porous TiO 2 /rGO hybrid architecture with unprecedented and highly stable lithium storage performance. Density functional theory calculations show that the (001) faceted TiO 2 nanosheets enable enhanced reaction kinetics by reinforcing their contact with the electrolyte and shortening the path length of Li + diffusion and
Laser
2019/9/1However, laser one-step induction of high-performance nitrogen-doped hierarchically porous graphene and its synthesis mechanism have not been reported. Here, we present an extremely facile, rapid and versatile strategy to selectively generation of nitrogen-doped graphene with micro-, meso-, and macro pores on self-assembled GO/urea mixture films via high-repetition picosecond
CaO particles as promising templates for hierarchical
Hierarchical porous carbon/graphene (HPC/HPG) materials have been intensively investigated over the past decades. These materials are demonstrated as promising electrode materials for various systems, such as lithium-ion batteries, lithium-sulfur batteries, supercapacitors, and fuel cells, with a remarkable capacity, high efficiency, long stability, and excellent rate capability. Researchers
Porous nanotube networks of SnO2/MoO3Graphene as
2020/12/7We successfully fabricated composite porous nanotube networks of SnO 2 /MoO 3 Graphene through electrospinning and used it as lithium-ion battery anodes. When the ratio of SnO 2 to MoO 3 is 1:1, the composite of SnO 2 /MoO 3 delivers a high capacity of 560 mAh g −1 at 1 A g −1 after 300 cycles. after 300 cycles.
Lithium
2015/11/5Theoretically, a Li-air battery is empty (discharged) when all pores of the positive electrode (right-hand side) are filled with lithium peroxide, shown here filling from top to bottom. However, Li 2 O 2 is a very bad electron conductor. If deposits of Li 2 O 2 grow on the electrode surface that supplies the electrons for the reaction, it dampens and eventually kills off the reaction, and
New graphene
New graphene-based lithium-air battery may enable New graphene-based lithium-air battery may enable longer-running electric cars Researchers at the Korean Daegu Gyeongbuk Institute of Science and Technology (DGIST) have fabricated an electrode using nickel cobalt sulphide nanoflakes on a sulfur-doped graphene, leading to a long-life battery with high discharge capacity.
Antimonene Allotropes α
21 Graphene and graphene-based composites as Li-ion battery electrode materials and their application in full cells Cai, Xiaoyi; Lai, Linfei; Shen, Zexiang; Lin, Journal of Materials Chemistry A: Materials for Energy and Sustainability ( 2017 ), 5 ( 30 ), 15423-15446 CODEN: JMCAET ;
Nanostructured porous graphene and its composites for
2017/10/30Therefore, porous graphene has been extensively studied for various energy storage systems including lithium-ion batteries (LIBs), supercapacitors, lithium–sulfur (Li–S), lithium–air (Li–air), and fuel cells [17,18,19,20,21].
Recyclable 'veggie' battery could power future devices
2021/3/22That is around two to three times the performance of a traditional lithium-ion battery with a solid electrode of the same thickness. The increased porosity, and thus the larger surface area, of the thickest 300-micron electrode also influenced the battery's areal capacity.
Ruthenium oxide modified hierarchically porous boron
Ruthenium oxide modified hierarchically porous boron-doped graphene aerogels as oxygen electrode for lithium oxygen batteries Xiuhui Zhanga, Chunguang Chena, Xiang Chenb, Tie Liua, Mengmeng Liub, Congcong Zhangb, Tao, Huangb, Aishui Yua,b,* aDepartment of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and
Hierarchically Porous Graphene as a Lithium–Air Battery
The lithium–air battery is one of the most promising technologies among various electrochemical energy storage systems. We demonstrate that a novel air electrode consisting of an unusual hierarchical arrangement of functionalized graphene sheets (with no catalyst) delivers an exceptionally high capacity of 15000 mAh/g in lithium–O2 batteries which is the highest value ever reported in this
Porous Graphene Materials for Energy Storage and
2015/11/23Porous graphene hybrids can also be produced by thermally treating a mixture of graphene and porous components [48–55]. Rui et al. [ 48 ] produced a V 2 O 5 /rGO composite by thermal pyrolysis of a hybrid of vanadium oxide (VO) and rGO at the temperature of 350C for 30 min under a heating rate of 10C/min in air.
Unprecedented and highly stable lithium storage capacity
Herein, we report a (001) faceted nanosheet-constructed hierarchically porous TiO 2 /rGO hybrid architecture with unprecedented and highly stable lithium storage performance. Density functional theory calculations show that the (001) faceted TiO 2 nanosheets enable enhanced reaction kinetics by reinforcing their contact with the electrolyte and shortening the path length of Li + diffusion and
Graphene batteries: Introduction and Market News
2019/1/24Since Oxygen has to be used as the cathode, the cathode material has to be porous to let the air pass, a property in which graphene excels. According to Log 9 Materials, the graphene used in the electrode is able to increase the battery efficiency by five times at one-third the cost.
Hierarchically Porous Graphene as a Lithium
Hierarchically Porous Graphene as a Lithium-Air Battery Electrode Skip to main content Main Menu Utility Menu Search Ilhan A. Aksay Pomeroy and Betty Perry Smith Professor in Engineering Chemical and Biological Engineering, Princeton University A-Wing
Lithium–air battery
The lithium–air battery (Li–air) is a metal–air electrochemical cell or battery chemistry that uses oxidation of lithium at the anode and reduction of oxygen at the cathode to induce a current flow.[1] Pairing lithium and ambient oxygen can theoretically lead to electrochemical cells with the highest possible specific energy. Indeed, the
Cycling Li
Abstract The rechargeable aprotic lithium-air (Li-O 2) battery is a promising potential technology for next-generation energy storage, but its practical realization still faces many challenges.In contrast to the standard Li-O 2 cells, which cycle via the formation of Li 2 O 2, we used a reduced graphene oxide electrode, the additive LiI, and the solvent dimethoxyethane to reversibly form and
Porous Graphene Materials for Energy Storage and
2015/11/23Porous graphene hybrids can also be produced by thermally treating a mixture of graphene and porous components [48–55]. Rui et al. [ 48 ] produced a V 2 O 5 /rGO composite by thermal pyrolysis of a hybrid of vanadium oxide (VO) and rGO at the temperature of 350C for 30 min under a heating rate of 10C/min in air.
Unprecedented and highly stable lithium storage capacity
Herein, we report a (001) faceted nanosheet-constructed hierarchically porous TiO 2 /rGO hybrid architecture with unprecedented and highly stable lithium storage performance. Density functional theory calculations show that the (001) faceted TiO 2 nanosheets enable enhanced reaction kinetics by reinforcing their contact with the electrolyte and shortening the path length of Li + diffusion and
Porous nanotube networks of SnO2/MoO3Graphene as
2020/12/7We successfully fabricated composite porous nanotube networks of SnO 2 /MoO 3 Graphene through electrospinning and used it as lithium-ion battery anodes. When the ratio of SnO 2 to MoO 3 is 1:1, the composite of SnO 2 /MoO 3 delivers a high capacity of 560 mAh g −1 at 1 A g −1 after 300 cycles. after 300 cycles.
CaO particles as promising templates for hierarchical
Hierarchical porous carbon/graphene (HPC/HPG) materials have been intensively investigated over the past decades. These materials are demonstrated as promising electrode materials for various systems, such as lithium-ion batteries, lithium-sulfur batteries, supercapacitors, and fuel cells, with a remarkable capacity, high efficiency, long stability, and excellent rate capability. Researchers
Hierarchically porous carbon
2017/11/1Graphene-based hierarchically porous materials have exhibited enormous potentials in high-performance lithium-ion batteries. However, the electrochemical performance of these materials is hampered due to the detachment of active materials from graphene upon long-term cycling.
Graphene Updates
Graphene sealed in a pouch with electrolytes makes a flexible supercapacitor. Image Credit: Ashley Jones / Clemson University In Geneva, Switzerland, supercapacitors power public buses two kilometers from a 15-second charge, and interest in Clemson's research is building.
Ruthenium oxide modified hierarchically porous boron
Ruthenium oxide modified hierarchically porous boron-doped graphene aerogels as oxygen electrode for lithium oxygen batteries Xiuhui Zhanga, Chunguang Chena, Xiang Chenb, Tie Liua, Mengmeng Liub, Congcong Zhangb, Tao, Huangb, Aishui Yua,b,* aDepartment of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and
Hierarchically Porous Graphene as a Lithium–Air Battery
The lithium–air battery is one of the most promising technologies among various electrochemical energy storage systems. We demonstrate that a novel air electrode consisting of an unusual hierarchical arrangement of functionalized graphene sheets (with no catalyst) delivers an exceptionally high capacity of 15000 mAh/g in lithium–O2 batteries which is the highest value ever reported in this
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