Recent developments of Co3O4-based materials as the catalysts for oxygen evolution reaction

2021 ◽  
Author(s):  
Zhenyu Hu ◽  
Liping Hao ◽  
Fan Quan ◽  
Rui Guo
Keyword(s):  
Energy Density ◽  
Oxygen Evolution ◽  
Oxygen Evolution Reaction ◽  
Fossil Fuels ◽  
High Energy ◽  
High Energy Density ◽  
Environmental Concerns ◽  
Efficient Energy ◽  
Recent Developments

The demand for the development of clean and efficient energy is becoming more and more pressing due to depleting fossil fuels and environmental concerns. Hydrogen is a high energy density...

Transportation: Fuel Energies

2017 ◽  
Author(s):  
Peter Rez
Keyword(s):  
Energy Density ◽  
Fossil Fuels ◽  
High Energy ◽  
Ease Of Use ◽  
Low Energy ◽  
High Energy Density ◽  
Nuclear Fuels ◽  
Liquid Hydrocarbons ◽  
Transportation Fuel ◽  
Journey Time

Transportation efficiency can be measured in terms of the energy needed to move a person or a tonne of freight over a given distance. For passengers, journey time is important, so an equally useful measure is the product of the energy used and the time taken for the journey. Transportation requires storage of energy. Rechargeable systems such as batteries have very low energy densities as compared to fossil fuels. The highest energy densities come from nuclear fuels, although, because of shielding requirements, these are not practical for most forms of transportation. Liquid hydrocarbons represent a nice compromise between high energy density and ease of use.

scholarly journals Designing high energy density flow batteries by tuning active-material thermodynamics

RSC Advances ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 5432-5443
Author(s):  
Shyam K. Pahari ◽  
Tugba Ceren Gokoglan ◽  
Benjoe Rey B. Visayas ◽  
Jennifer Woehl ◽  
James A. Golen ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Energy Density ◽  
Fossil Fuels ◽  
Active Material ◽  
High Energy ◽  
Theoretical Framework ◽  
High Energy Density ◽  
Density Flow ◽  
The Cost

With the cost of renewable energy near parity with fossil fuels, energy storage is paramount. We report a breakthrough on a bioinspired NRFB active-material, with greatly improved solubility, and place it in a predictive theoretical framework.

Optimized electron occupancy of solid-solution transition metals for suppressing the oxygen evolution of Li2MnO3

2021 ◽  
Vol 9 (14) ◽  
pp. 9337-9346
Author(s):  
Erhong Song ◽  
Yifan Hu ◽  
Ruguang Ma ◽  
Yining Li ◽  
Xiaolin Zhao ◽  
...  
Keyword(s):  
Solid Solution ◽  
Energy Density ◽  
Transition Metals ◽  
Oxygen Evolution ◽  
High Energy ◽  
High Energy Density ◽  
Li Ion Batteries ◽  
Li Ion ◽  
Increasing Demand ◽  
Layered Cathodes

Li-rich layered cathodes based on Li2MnO3 have exhibited extraordinary promise to satisfy the rapidly increasing demand for high-energy density Li-ion batteries.

Bifunctional iron disulfide nanoellipsoids for high energy density supercapacitor and electrocatalytic oxygen evolution applications

2019 ◽  
Vol 6 (3) ◽  
pp. 659-670 ◽  
Author(s):  
Zhiqin Sun ◽  
Xue Yang ◽  
Huiming Lin ◽  
Feng Zhang ◽  
Qian Wang ◽  
...  
Keyword(s):  
Energy Density ◽  
Electrochemical Performance ◽  
Oxygen Evolution ◽  
High Energy ◽  
High Energy Density ◽  
Microwave Assisted ◽  
Iron Disulfide ◽  
Excellent Electrochemical Performance ◽  
Microwave Assisted Method

FeS2, prepared using a rapid microwave assisted method, exhibits excellent electrochemical performance for supercapacitor and OER applications.

Conversion of Carbon Dioxide into Several Potential Chemical Commodities Following Different Pathways - A Review

2013 ◽  
Vol 764 ◽  
pp. 1-82 ◽  
Author(s):  
Ibram Ganesh
Keyword(s):  
Carbon Dioxide ◽  
Global Warming ◽  
Energy Density ◽  
Solar Energy ◽  
Fossil Fuels ◽  
Energy Resource ◽  
Value Added ◽  
High Energy ◽  
High Energy Density ◽  
Methanol Production

This article reviews the literature related to the direct uses of CO2and its conversion into various value added chemicals including high energy density liquid fuels such as methanol. The increase in the direct uses of CO2and its conversion into potential chemical commodities is very important as it directly contributes to the mitigation of CO2related global warming problem. The method being followed at present in several countries to reduce the CO2associated global warming is capturing of CO2at its major outlets using monoethanolamine based solution absorption technique followed by storing it in safe places such as, oceans, depleted coal seams, etc., (i.e., carbon dioxide capturing and storing in safe places, CCS process). This is called as CO2sequestration. Although, the CCS process is the most understood and immediate option to mitigate the global warming problem, it is considerably expensive and has become a burden for those countries, which are practicing this process. The other alternative and most beneficial way of mitigating this global warming problem is to convert the captured CO2into certain value added bulk chemicals instead of disposing it. Conversion of CO2into methanol has been identified as one of such cost effective ways of mitigating global warming problem. Further, if H2is produced from exclusively water using only solar energy instead of any fossil fuel based energy, and is used to convert CO2into methanol there are three major benefits: i) it contributes greatly to the global warming mitigation problem, ii) it greatly saves fossil fuels as methanol production from CO2could be an excellent sustainable and renewable energy resource, and iii) as on today, there is no better process than this to store energy in a more convenient and highly usable form of high energy density liquid fuel. Not only methanol, several other potential chemicals and value added chemical intermediates can be produced from CO2. In this article, i) synthesis of several commodity chemicals including poly and cyclic-carbonates, sodium carbonate and dimethyl carbonate, carbamates, urea, vicinal diamines, 2-arylsuccinic acids, dimethyl ether, methanol, various hydrocarbons, acetic acid, formaldehyde, formic acid, lower alkanes, etc., from CO2, ii) the several direct uses of CO2, and iii) the importance of producing methanol from CO2using exclusively solar energy are presented, discussed and summarized by citing all the relevant and important references.

An advanced sandwich-type architecture of MnCo2O4@N–C@MnO2 as an efficient electrode material for a high-energy density hybrid asymmetric solid-state supercapacitor

2018 ◽  
Vol 6 (47) ◽  
pp. 24509-24522 ◽  
Author(s):  
Khem Raj Shrestha ◽  
Syam Kandula ◽  
G. Rajeshkhanna ◽  
Manish Srivastava ◽  
Nam Hoon Kim ◽  
...  
Keyword(s):  
Solid State ◽  
Energy Density ◽  
Thin Layer ◽  
High Energy ◽  
High Energy Density ◽  
Sandwich Shell ◽  
Storage Material ◽  
Efficient Energy ◽  
Sandwich Type ◽  
Energy Storage Material

A thin layer of N–C sandwiched between an electroactive MnCo2O4 core and MnO2 shell results in sophisticated, robust core@sandwich@shell as a highly efficient energy storage material.

scholarly journals THE ROLE OF BATTERIES IN NEAR-FUTURE ENERGETICS

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Slavko Mentus
Keyword(s):  
Energy Density ◽  
Fossil Fuels ◽  
Renewable Energy Sources ◽  
Lithium Ion ◽  
High Energy ◽  
High Energy Density ◽  
Energy Sources ◽  
Electric Cars ◽  
Oil Crisis

Since the first oil crisis in early 70-ties, the electrochemists strive to develop a chemical power source able to replace the liquid fossil fuels in traffic. Noticeable success was achieved in the decade 1980-1990. Thanks to a new class of materials – intercalate compounds, a new battery called lithium-ion battery was commercialized, having much higher energy density than its predecessors. In this work the origin of its high energy density is explained. The emergence of new battery supported effectively the expansion of use and the development of portable electronics - mobile phones, lap-top calculators tablets etc. Since 2010, connected to the global intentions to prevent climate changes, the batteries received the role of the energy sources of electric cars. Recently, connected to the rising use of renewable energy sources known to suffer of changeable intensity, batteries take also the role of grid energy storage, having the function to smooth the disturbances in grid voltage. All this caused huge rise in batteries usage, and poses the question about the availability of global resources of lithium, cobalt and nickel needed for battery production. The recent forecast is that these resources will be exhausted very soon in the decade 2030-2040. Thus, there is a strong need to search for new battery types, to maintain, at least partly, available lithium resources for more demanding applications. As a part of solutions having real perspective, the development of sodium-ion battery is currently in progress. In that sense, some perspective anode and cathode materials were considered.

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