Electrochemistry in Energy Conversion and Storage

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Chemical and Molecular Sciences".

Deadline for manuscript submissions: 30 May 2024 | Viewed by 579

Special Issue Editor

School of Chemistry, Beihang University, Beijing 100191, China
Interests: water splitting; Na-S battery; catalyst; interface; stability

Special Issue Information

Dear Colleagues,

The generation, conversion, and storage of clean electrical energy will undoubtedly influence the development of a zero carbon economy. As solar energy, wind energy, and other green energy are season-sensitive, the as-produced electricity needs to be converted or stored. One main route is to produce hydrogen and other chemical fuels using excess power. Another route is to store electricity in energy-storage devices. As for the two main routes, a series of research hotspots can be covered. For example, efficient electrocatalysts for water/seawater splitting are important in reducing the cost of hydrogen energy. Hydrogen–oxygen fuel cells can re-convert hydrogen into electricity for practical application. We can also develop electrosynthesis for economic fuel molecules using greenhouse-effect gas (carbon dioxide, or methane) as raw material. In addition to compressed air systems for energy storage, many kinds of batteries (lithium/sodium-ion battery, lithium/sodium-sulfur battery, etc.) with considerable capacities can also be used. Various electrochemical processes and mechanisms involved in the above energy conversion and storage are waiting to be revealed. These findings will promote regulations on major energy structures and the exploration of environmentally friendly fuels.

Prof. Dr. Wei Zhou
Guest Editor

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Keywords

  • hydrogen energy
  • water/seawater splitting
  • oxygen reduction reaction
  • Li/Na-S battery
  • lithium/sodium-ion battery
  • electrosynthesis
  • catalyst
  • energy material

Published Papers (1 paper)

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Research

16 pages, 2448 KiB  
Article
Study on the Degradation of SOFC Anodes Induced by Chemical and Electrochemical Sintering Using EIS and µ-CT
Appl. Sci. 2023, 13(23), 12785; https://doi.org/10.3390/app132312785 - 28 Nov 2023
Viewed by 434
Abstract
The goal of the present study was to quantify degradation phenomena on anodes that can be attributed to chemical (thermal) and/or electrochemical sintering, to find out the underlying mechanisms, and to propose countermeasures. The samples were thermally aged for times from 0 to [...] Read more.
The goal of the present study was to quantify degradation phenomena on anodes that can be attributed to chemical (thermal) and/or electrochemical sintering, to find out the underlying mechanisms, and to propose countermeasures. The samples were thermally aged for times from 0 to 1000 h, and additional samples of the same type were subjected to electrochemical loading over the same period. The cells were then examined for microstructural changes using FE-SEM/EDS and micro-computed tomography (µ-CT), and the results are correlated with electrochemical impedance spectroscopy (EIS) parameters of long-term electrochemical experiments under dry and humid conditions. It has been shown that it is possible to distinguish between the thermal (chemical) and the electrochemical part of the microstructure degradation. Humidity is an important factor that affects the microstructure in the long term. Tortuosity, porosity, and specific resistance change with time, depending on the humidity of the fuel. Tortuosity changes by one order of magnitude in the direction perpendicular to the electrode surface, while in the other two directions in the plane, the changes are only moderate. Porosity increases in all electrochemically treated samples by 1–5% depending on dry ore humidity conditions and time. As all other experimental parameters are the same in all experiments, the EIS results confirm through the increasing specific resistance, mainly the influence of the changes on the microstructure on the electrochemical properties of the cells. Full article
(This article belongs to the Special Issue Electrochemistry in Energy Conversion and Storage)
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