
Gasgoo News According to foreign media reports, modern life is becoming
more and more dependent on electricity, and the constant demand for electricity
has also made people's demand for greener and more portable energy sources
higher and higher. Although wind power and solar panels are very promising
alternative energy sources, they are highly unreliable as their output is
affected by external factors. Therefore, from an energy allocation and economic
perspective, high-energy secondary batteries (rechargeable batteries or storage
batteries) are the future development direction. Professor Idemoto of Tokyo
University of Science led a team of researchers to successfully reverse the
chemical reaction of ions by synthesizing a new type of electrode material
(metal compound), solving the problem of energy waste and laying the foundation
for the production of the next generation of rechargeable magnesium batteries.
An important foundation was laid. The researchers are very optimistic about
their findings, saying: "We have synthesized a rock salt that has great
potential as a cathode material for next-generation secondary batteries."
Batteries are the most popular portable energy source and consist of three basic
components – anode, The three parts of the cathode and the electrolyte react
chemically with each other. The anode generates additional electrons
(oxidation), and the electrons are absorbed by the cathode (reduction),
resulting in a redox reaction. Because the electrolyte inhibits the flow of
electrons between the anode and cathode, electrons flow preferentially in the
external circuit, causing current or "electricity" to flow. A battery is "dead"
when the material in the cathode/anode can no longer absorb/shed electrons.
However, some materials are able to reverse such chemical reactions, returning
the material to its original state, using an external electrical force running
in reverse direction, such as rechargeable batteries found in devices such as
phones, tablets and electric cars. Professor Idemoto of Tokyo University of
Science and colleagues synthesized MgNiO2 material that replaces cobalt, which
has the potential to become a new cathode material. Professor Idemoto said: "We
are focusing on rechargeable magnesium batteries using multivalent magnesium
ions as mobile ions, and it is expected to realize next-generation rechargeable
batteries with high energy density." Recently, magnesium batteries have been
used because of their low toxicity and easy reversal reaction. There has been
considerable interest in utilizing magnesium as an anode material for high
energy density rechargeable batteries. However, this is difficult to achieve due
to the lack of suitable complementary cathodes and electrolytes. On the basis of
standard laboratory techniques, the researchers used the "reverse
co-precipitation method" to synthesize this new type of salt, and this new type
of rock salt can be extracted from aqueous solution. To study the structure and
lattice imaging of the extracted salt, the researchers used neutron and
synchrotron X-ray spectroscopy. In other words, they studied the diffraction
patterns produced by powder samples exposed to neutron or X-ray irradiation. At
the same time, they studied the rock salt. This type of rock salt has the
"charge and discharge behavior" required for cathode materials, allowing them to
determine the magnesium, nickel and cobalt positive ions based on the most
energy-stable structure among the 100 symmetrically different candidate
structures generated. Arrangement in rock salt structure. In addition to
structural analysis, the researchers also used three-pole batteries and known
reference electrodes to conduct charge and discharge tests under various
conditions to understand the electrochemical performance of rock salt as a
cathode material for magnesium rechargeable batteries. They found that the
electrochemical properties of rock salt can be determined based on the
composition of magnesium and nickel/ The proportion of cobalt controls the
characteristics of the battery. The structural and electrochemical analyzes
performed allowed the researchers to demonstrate rock salt's potential as a
cathode material and its reliability in different environments. Currently, the
secondary battery industry is dominated by lithium-ion batteries, which are used
for power storage in automobiles and portable devices. However, such batteries
have limited energy density and power storage capabilities. However, Professor
Idemoto said that the new secondary magnesium battery has the ability to replace
lithium-ion batteries as a high-energy-density secondary battery. *Special
statement: This article is an original technical article by Gasgoo Auto, and the
copyright belongs to Gasgoo Automobile. Reprinting or large excerpts are
prohibited! Illegal reprinting will be punished by law.
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