New breakthrough in lithium-air battery makes cruising range no longer a headache -Lithium - Ion Battery Equipment
my country Energy Storage Network News: In recent years, electric vehicles are not just a concept, but are gradually entering people's lives. However, compared with the hot popularity of traditional fuel vehicles, electric vehicles are in stark contrast to the former. The crux of the problem is that battery life and cruising range are still a headache.
However, technology is advancing and innovation is happening all the time. Recently, researchers announced a breakthrough in the stability of lithium-air batteries. If the new technology can be put into commercial use, electric vehicles are expected to have the same or even stronger battery life than traditional fuel vehicles in the future, and the unpopular fate of electric vehicles may be reversed.
Lithium-air batteries seek a breakthrough
For many years, researchers have been hoping to replace traditional lithium-ion batteries with lithium-air batteries, because the former has a stronger storage capacity, which is more than 10 times higher than that of the best-performing lithium-ion batteries, and can supply as much electricity as gasoline. energy of. Lithium-air batteries absorb oxygen from the air to recharge, so the batteries can be smaller and lighter.
Although lithium-air batteries have broad application prospects, due to the instability of the internal structure, it is difficult to find available electrolytes and electrode materials, and they will disintegrate after several charges and discharges, which prevents lithium-air batteries from entering the consumer market. .
When a lithium-air battery is discharging, the lithium at the anode releases electrons and becomes lithium cations. The lithium cations pass through the electrolyte material, combine with oxygen and electrons flowing from the external circuit at the cathode to form lithium oxide or lithium peroxide, and stay at the cathode. The charging process is the opposite. The entire charge-discharge cycle requires a stable electrode and electrolyte environment. However, in previous studies, people have been unable to maintain the stability of the two. The carbon rod used as the cathode will have various unexpected side reactions with the electrolyte, which will lead to the gradual disintegration of the carbon rod. After several charge-discharge cycles , a lithium-air battery is completely unusable. This makes scientists have to find another way in research.(Lithium - Ion Battery Equipment)
gold as electrode
Recently, researchers from the University of St. Andrews in Scotland have brought good news for a breakthrough in lithium-air batteries, and the solution is gold. Their research results have been published in "Science" (Science) on.
Researchers led by Peter Bruce have created an experimental model of a lithium-air battery using DMSO (dimethyl sulfoxide) as the electrolyte and porous gold as the electrode. The battery capacity can still maintain 95% of the original.
The research team replaced the traditional carbon cathode with an inert nanoscale gold cathode, which is much more stable than carbon rods; they also replaced the electrolyte made of polycarbonates or polyethers with It becomes a conductive solution called dimethyl sulfoxide (DMSO), which is less reactive at the cathode. Facts have proved that they succeeded, and the stability of the new "nano gold-dimethyl sulfoxide" combination is far beyond that of the original combination.
"Lithium-ion batteries have a high energy storage density, and from this point of view it is our best choice. It has gradually penetrated into our lives, including applications in electric vehicles." Bruce said, "We also found that, Now the storage capacity of car batteries must be at least doubled to truly meet the requirements of driving. This is beyond the reach of traditional lithium-ion batteries, so we turned our attention to lithium-air batteries."
observed local reversibility
Coincidentally. The research team at Oak Ridge National Laboratory in the United States has also solved a difficult problem in lithium-air batteries: reversibility, which is important for this type of battery to achieve repeated charging and cost reduction. Relevant research reports have been published in the recently published "Nanotechnology" magazine.
In this study, the scientists used an atomic force microscope (AFM) with a tip of 20 nanometers, based on a lithium-ion conductive glass ceramic electrolyte, and measured the change in the height of the microscope tip during cycling using direct current to analyze the rise of lithium particles, thereby exploring battery reversibility. They observed local reversibility of the lithium particles -- the highest level of reversibility was achieved when the smallest particles were formed. The researchers found that both increases and decreases in apex height correlated with changes in electrical current.
However, technology is advancing and innovation is happening all the time. Recently, researchers announced a breakthrough in the stability of lithium-air batteries. If the new technology can be put into commercial use, electric vehicles are expected to have the same or even stronger battery life than traditional fuel vehicles in the future, and the unpopular fate of electric vehicles may be reversed.
Lithium-air batteries seek a breakthrough
For many years, researchers have been hoping to replace traditional lithium-ion batteries with lithium-air batteries, because the former has a stronger storage capacity, which is more than 10 times higher than that of the best-performing lithium-ion batteries, and can supply as much electricity as gasoline. energy of. Lithium-air batteries absorb oxygen from the air to recharge, so the batteries can be smaller and lighter.
Although lithium-air batteries have broad application prospects, due to the instability of the internal structure, it is difficult to find available electrolytes and electrode materials, and they will disintegrate after several charges and discharges, which prevents lithium-air batteries from entering the consumer market. .
When a lithium-air battery is discharging, the lithium at the anode releases electrons and becomes lithium cations. The lithium cations pass through the electrolyte material, combine with oxygen and electrons flowing from the external circuit at the cathode to form lithium oxide or lithium peroxide, and stay at the cathode. The charging process is the opposite. The entire charge-discharge cycle requires a stable electrode and electrolyte environment. However, in previous studies, people have been unable to maintain the stability of the two. The carbon rod used as the cathode will have various unexpected side reactions with the electrolyte, which will lead to the gradual disintegration of the carbon rod. After several charge-discharge cycles , a lithium-air battery is completely unusable. This makes scientists have to find another way in research.(Lithium - Ion Battery Equipment)
gold as electrode
Recently, researchers from the University of St. Andrews in Scotland have brought good news for a breakthrough in lithium-air batteries, and the solution is gold. Their research results have been published in "Science" (Science) on.
Researchers led by Peter Bruce have created an experimental model of a lithium-air battery using DMSO (dimethyl sulfoxide) as the electrolyte and porous gold as the electrode. The battery capacity can still maintain 95% of the original.
The research team replaced the traditional carbon cathode with an inert nanoscale gold cathode, which is much more stable than carbon rods; they also replaced the electrolyte made of polycarbonates or polyethers with It becomes a conductive solution called dimethyl sulfoxide (DMSO), which is less reactive at the cathode. Facts have proved that they succeeded, and the stability of the new "nano gold-dimethyl sulfoxide" combination is far beyond that of the original combination.
"Lithium-ion batteries have a high energy storage density, and from this point of view it is our best choice. It has gradually penetrated into our lives, including applications in electric vehicles." Bruce said, "We also found that, Now the storage capacity of car batteries must be at least doubled to truly meet the requirements of driving. This is beyond the reach of traditional lithium-ion batteries, so we turned our attention to lithium-air batteries."
observed local reversibility
Coincidentally. The research team at Oak Ridge National Laboratory in the United States has also solved a difficult problem in lithium-air batteries: reversibility, which is important for this type of battery to achieve repeated charging and cost reduction. Relevant research reports have been published in the recently published "Nanotechnology" magazine.
In this study, the scientists used an atomic force microscope (AFM) with a tip of 20 nanometers, based on a lithium-ion conductive glass ceramic electrolyte, and measured the change in the height of the microscope tip during cycling using direct current to analyze the rise of lithium particles, thereby exploring battery reversibility. They observed local reversibility of the lithium particles -- the highest level of reversibility was achieved when the smallest particles were formed. The researchers found that both increases and decreases in apex height correlated with changes in electrical current.
