A high-performance oxygen electrode for Li–O2 batteries: Mo2C nanoparticles grown on carbon fibers

2017 ◽  
Vol 5 (12) ◽  
pp. 5690-5695 ◽  
Author(s):  
Yong Luo ◽  
Chao Jin ◽  
Zhangjun Wang ◽  
Minghui Wei ◽  
Chenghao Yang ◽  
...  
Keyword(s):  
Energy Density ◽  
Carbon Fibers ◽  
High Performance ◽  
Oxygen Electrode ◽  
Oxygen Electrodes ◽  
The Creation ◽  
Lithium Oxygen Batteries

While lithium–oxygen batteries (LOBs) have the potential to offer energy density far greater than those of existing batteries, their commercialization hinges on the creation of highly reversible and efficient oxygen electrodes.

Configuration of gradient-porous ultrathin FeCo2S4 nanosheets vertically aligned on Ni foam as a noncarbonaceous freestanding oxygen electrode for lithium–oxygen batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (3) ◽  
pp. 1864-1874 ◽  
Author(s):  
Zhiqian Hou ◽  
Chaozhu Shu ◽  
Peng Hei ◽  
Tingshuai Yang ◽  
Ruixin Zheng ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
Oxygen Electrode ◽  
Commercial Application ◽  
Oxygen Species ◽  
Ni Foam ◽  
Oxygen Electrodes ◽  
Vertically Aligned ◽  
Lithium Oxygen Batteries

The degradation of oxygen electrodes caused by oxygen species in lithium–oxygen (Li–O2) batteries deteriorates their energy efficiency and cyclability and seriously hinders their commercial application.

Carbon embedded α-MnO2@graphene nanosheet composite: a bifunctional catalyst for high performance lithium oxygen batteries

2014 ◽  
Vol 2 (44) ◽  
pp. 18736-18741 ◽  
Author(s):  
Yong Cao ◽  
Ming-sen Zheng ◽  
Senrong Cai ◽  
Xiaodong Lin ◽  
Cheng Yang ◽  
...  
Keyword(s):  
High Performance ◽  
Bifunctional Catalyst ◽  
Oxygen Electrode ◽  
Electron Conductivity ◽  
Graphene Nanosheet ◽  
Lithium Oxygen Batteries

Carbon is essential for the oxygen electrode in non-aqueous lithium–oxygen (Li–O2) batteries for improving the electron conductivity of the electrode.

A 3D free-standing Co doped Ni2P nanowire oxygen electrode for stable and long-life lithium–oxygen batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (12) ◽  
pp. 6785-6794 ◽  
Author(s):  
Zhiqian Hou ◽  
Chaozhu Shu ◽  
Peng Hei ◽  
Tingshuai Yang ◽  
Ruixin Zheng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Oxygen Electrode ◽  
Effective Strategy ◽  
Free Standing ◽  
Oxygen Electrodes ◽  
Long Life ◽  
Lithium Oxygen Batteries ◽  
Co Doped

Exploring oxygen electrodes with superior bifunctional catalytic activity and suitable architecture is an effective strategy to improve the performance of lithium–oxygen (Li–O2) batteries.

Cobalt-substituted SrTi0.3Fe0.7O3−δ: a stable high-performance oxygen electrode material for intermediate-temperature solid oxide electrochemical cells

2018 ◽  
Vol 11 (7) ◽  
pp. 1870-1879 ◽  
Author(s):  
Shan-Lin Zhang ◽  
Hongqian Wang ◽  
Matthew Y. Lu ◽  
Ai-Ping Zhang ◽  
Liliana V. Mogni ◽  
...  
Keyword(s):  
Electrode Material ◽  
Polarization Resistance ◽  
High Performance ◽  
Oxygen Electrode ◽  
Solid Oxide ◽  
Intermediate Temperature ◽  
Electrochemical Cells ◽  
Unique Combination ◽  
Oxygen Electrodes

SrTi0.3Fe0.7−xCoxO3−δ oxygen electrodes provide a unique combination of low polarization resistance and stability useful for solid oxide electrochemical cells.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

Efficient Co-Harvesting of Solar Energy and Low-Grade Heat by Molecular Photoswitches for High Energy Density, Long-Term Stable Solar Thermal Battery

2019 ◽  
Author(s):  
Zhao-Yang Zhang ◽  
Tao LI
Keyword(s):  
Energy Density ◽  
Solar Energy ◽  
High Performance ◽  
High Energy ◽  
Solar Thermal ◽  
High Energy Density ◽  
Low Grade ◽  
Thermal Battery ◽  
Low Grade Heat

Solar energy and ambient heat are two inexhaustible energy sources for addressing the global challenge of energy and sustainability. Solar thermal battery based on molecular switches that can store solar energy and release it as heat has recently attracted great interest, but its development is severely limited by both low energy density and short storage stability. On the other hand, the efficient recovery and upgrading of low-grade heat, especially that of the ambient heat, has been a great challenge. Here we report that solar energy and ambient heat can be simultaneously harvested and stored, which is enabled by room-temperature photochemical crystal-to-liquid transitions of small-molecule photoswitches. The two forms of energy are released together to produce high-temperature heat during the reverse photochemical phase change. This strategy, combined with molecular design, provides high energy density of 320-370 J/g and long-term storage stability (half-life of about 3 months). On this basis, we fabricate high-performance, flexible film devices of solar thermal battery, which can be readily recharged at room temperature with good cycling ability, show fast rate of heat release, and produce high-temperature heat that is >20<sup> o</sup>C higher than the ambient temperature. Our work opens up a new avenue to harvest ambient heat, and demonstrate a feasible strategy to develop high-performance solar thermal battery.

scholarly journals Recent Advances in the Synthesis of Polymer-Grafted Low-K and High-K Nanoparticles for Dielectric and Electronic Applications

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2942
Author(s):  
Bhausaheb V. Tawade ◽  
Ikeoluwa E. Apata ◽  
Nihar Pradhan ◽  
Alamgir Karim ◽  
Dharmaraj Raghavan
Keyword(s):  
Energy Density ◽  
Polymer Nanocomposites ◽  
High Performance ◽  
Breakdown Strength ◽  
Polymer Nanocomposite ◽  
High Energy ◽  
Polymer Chains ◽  
High Energy Density ◽  
Grafted Nanoparticles ◽  
Grafting From

The synthesis of polymer-grafted nanoparticles (PGNPs) or hairy nanoparticles (HNPs) by tethering of polymer chains to the surface of nanoparticles is an important technique to obtain nanostructured hybrid materials that have been widely used in the formulation of advanced polymer nanocomposites. Ceramic-based polymer nanocomposites integrate key attributes of polymer and ceramic nanomaterial to improve the dielectric properties such as breakdown strength, energy density and dielectric loss. This review describes the ”grafting from” and ”grafting to” approaches commonly adopted to graft polymer chains on NPs pertaining to nano-dielectrics. The article also covers various surface initiated controlled radical polymerization techniques, along with templated approaches for grafting of polymer chains onto SiO2, TiO2, BaTiO3, and Al2O3 nanomaterials. As a look towards applications, an outlook on high-performance polymer nanocomposite capacitors for the design of high energy density pulsed power thin-film capacitors is also presented.

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