rexresearch
Jianqiang WANG, et al
Iron-Air Battery
https://interestingengineering.com/energy/new-all-iron-battery-sustains-6000-cycles
China develops iron battery 80 times cheaper than lithium that
can last 16 years
It provides a budget-friendly, high-endurance answer for
the world’s massive energy storage needs.
A research team at the Institute of Metal Research of the
Chinese Academy of Sciences (CAS) has advanced “all-iron” flow
battery technology.
...To overcome existing hurdles, the Chinese team employed a
“synergistic design” at the molecular level, engineering a
specialized iron complex that serves as a double-layered
defense.
The South China Morning Post stated that this molecule uses its
rigid, bulky structure to physically shield the iron core from
chemical attack, while its strong negative charge creates a
force field that repels leaking particles.
Together, these mechanisms prevent the battery’s active
materials from degrading or from escaping across the membrane,
thereby ensuring long-term stability....
The battery prototype demonstrated endurance, maintaining a
stable structure and perfect reversibility over 6,000 cycles —
equivalent to more than 16 years of daily operation — with zero
loss in storage capacity.
Throughout this period, the system remained free of harmful
by-products or sediment while achieving a 99.4 percent
leak-proof efficiency. Even at high power outputs, it retained
78.5 percent of its energy efficiency, proving that the design
is both reliable and durable.
https://www.scmp.com/news/china/science/article/3351111/china-unveils-ultra-cheap-all-iron-battery-renewable-energy-storage
China unveils ultra-cheap ‘all-iron flow battery’ for
renewable energy storage
https://www.cell.com/cell-reports-physical-science/fulltext/S2666-3864(26)00175-X
A triple-conductive catalytic and confining network for
high-areal capacity solid-state Iron-Air Batteries
https://www.eurekalert.org/news-releases/614440
Salt battery design overcomes bump in the road to help
electric cars go the extra mile
...The researchers have now successfully improved the technology
by turning the molten salt into soft-solid salt, using solid
oxide nano-powders. Professor Jianqiang Wang, from the Shanghai
Institute of Applied Physics, Chinese Academy of Sciences, who
is leading this collaboration project has predicted that this
quasi-solid-state (QSS) electrolyte is suitable for metal-air
batteries which operate at 800 ºC; as it suppresses the
evaporation and fluidity of the molten salts that can occur at
such high operating temperatures.
Project collaborator, Dr Cheng Peng, also from the Shanghai
Institute of Applied Physics, Chinese Academy of Sciences,
explains a unique and useful design aspect of this experimental
research. The quasi-solidification has been achieved using
nanotechnology to construct a flexibly-connected network of
solid oxide particles that act as a structural barrier locking
in the molten salt electrolytes, while still allowing them to
safely conduct electricity in extreme heat...
https://www.sciencedirect.com/science/article/abs/pii/S2405829720304268?via%3Dihub
Quasi-solid-state electrolyte for rechargeable
high-temperature molten salt iron-air battery
Shiyu Zhang, et al.
Abstract -- Molten salts are a unique type of
electrolyte enabling high-temperature electrochemical energy
storage (EES) with unmatched reversible electrode kinetics and
high ion-conductivities, and hence impressive storage capacity
and power capability. However, their high tendency to evaporate
and flow at high temperatures challenges the design and
fabrication of the respective EES devices in terms of
manufacturing cost and cycling durability. On the other hand,
most of these EES devices require lithium-containing molten
salts as the electrolyte to enhance performances, which not only
increases the cost but also demands a share of the already
limited lithium resources. Here we report a novel
quasi-solid-state (QSS) electrolyte, consisting of the molten
eutectic mixture of Na2CO3-K2CO3 and nanoparticles of yttrium
stabilized zirconia (YSZ) in a mass ratio of 1:1. The QSS
electrolyte has relatively lower volatility in comparison with
the pristine molten Na2CO3-K2CO3 eutectic, and therefore
significantly suppresses the evaporation of molten salts, thanks
to a strong interaction at the interface between molten salt and
YSZ nanoparticles at high temperatures. The QSS electrolyte was
used to construct an iron-air battery that performed excellently
in charge-discharge cycling with high columbic and energy
efficiencies. We also propose and confirm a redox mechanism at
the three-phase interlines in the negative electrode. These
findings can help establish a simpler and more efficient
approach to designing low-cost and high-performance molten salt
metal-air batteries with high stability and safety.
https://d197for5662m48.cloudfront.net/documents/publicationstatus/311291/preprint_pdf/c7c29adf209704aae062075d2d165bc6.pdf
PDF
Inventor: WANG JIANQIANG et al
Applicant: SHANGHAI INST APPLIED PHYSICS CAS [CN]
Abstract -- The present invention relates to an
all-solid-state iron-air battery, which comprises a positive
electrode, a negative electrode, a separator and a solid
electrolyte, wherein the positive electrode and the negative
electrode are respectively arranged on opposite sides of the
solid electrolyte; the separator is arranged between the
negative electrode and the solid electrolyte to form a sandwich
structure; the negative electrode is a ferrate material formed
from an alkali metal-doped iron oxide; the positive electrode is
a metal or a metal oxide material with an efficient redox
catalytic activity; the solid electrolyte is an electrolyte
material capable of efficiently conducting oxygen ions; and the
separator is a film-like or sheet-like material having oxygen
ion conduction and electronic insulation performances. According
to the all-solid-state iron-air battery of the present
invention, in the negative electrode, by introducing the alkali
metal into an iron oxide crystal lattice by means of doping, the
electrochemical reaction activity of the iron electrode can be
remarkably improved, the potSential safety hazard problem caused
by battery overcharging is improved, and the performance of the
iron-air battery is remarkably improved; and the separator is
arranged between the solid electrolyte and the negative
electrode, such that the battery electric leakage problem can be
effectively relieved.