固体電解質の欠陥から始めて、全固体電池-リチウム-イオン電池装置の研究に新たな進歩が見られました
2023年6月17日
Introduction: Scientists in the United States have used sophisticated imaging techniques to observe a previously unknown defect in the crystal structure of a solid electrolyte. These defects, the scientists reasoned, may play an important role in the electrolyte's performance, and more careful engineering of them into the material could yield impressive results.
Although solid-state batteries have attracted the attention of the energy storage industry, their commercial applications to date have been very limited and are in various stages of scientific investigation and potential commercialization. There are a large number of different potential materials that could replace the liquids used in Li-ion batteries today. electrolyte.(Lithium - Ion Battery Equipment)
Scientists led by Cornell University in the US have taken a closer look at such a material, made possible by state-of-the-art imaging techniques at the Advanced Photon Source at Argonne National Laboratory's Synchrotron Radiation Light Facility.
The group studied a sample of aluminum-doped lanthanum lithium oxide (LLZO). Although oxide materials are considered more challenging to produce commercially than sulfides or polymers, oxides also have potential. According to the Cornell researchers, LLZO has high ion conductivity and good stability.
After synthesizing the LLZO sample, the team went to the Advanced Photon Source, where they used a technique called Bragg coherent diffraction imaging to shine a beam of X-rays on the one-micron-sized grains of the material and create its 3D image of the internal structure.
"These electrolytes were thought to be perfect crystals, but what we found were defects that hadn't been reported before, such as dislocations and grain boundaries," said Yifei Sun, a researcher at Cornell University. Aluminum processes are responsible for many of these dislocations and grain boundaries, and could inform future developments in solid-state batteries.
The team is now planning further research to understand how these defects affect how the battery works when charging and discharging, and whether they can control the rise of these defects to gain further advantages. Andrej Singer, a senior scientist on the group, said: "Now that we know exactly what we are looking for, we want to find these defects and watch them as we operate the battery, we are still very far from it, but we may be at a new development As a starting point, we can purposefully engineer these defects to make better energy storage materials."
Although solid-state batteries have attracted the attention of the energy storage industry, their commercial applications to date have been very limited and are in various stages of scientific investigation and potential commercialization. There are a large number of different potential materials that could replace the liquids used in Li-ion batteries today. electrolyte.(Lithium - Ion Battery Equipment)
Scientists led by Cornell University in the US have taken a closer look at such a material, made possible by state-of-the-art imaging techniques at the Advanced Photon Source at Argonne National Laboratory's Synchrotron Radiation Light Facility.
The group studied a sample of aluminum-doped lanthanum lithium oxide (LLZO). Although oxide materials are considered more challenging to produce commercially than sulfides or polymers, oxides also have potential. According to the Cornell researchers, LLZO has high ion conductivity and good stability.
After synthesizing the LLZO sample, the team went to the Advanced Photon Source, where they used a technique called Bragg coherent diffraction imaging to shine a beam of X-rays on the one-micron-sized grains of the material and create its 3D image of the internal structure.
"These electrolytes were thought to be perfect crystals, but what we found were defects that hadn't been reported before, such as dislocations and grain boundaries," said Yifei Sun, a researcher at Cornell University. Aluminum processes are responsible for many of these dislocations and grain boundaries, and could inform future developments in solid-state batteries.
The team is now planning further research to understand how these defects affect how the battery works when charging and discharging, and whether they can control the rise of these defects to gain further advantages. Andrej Singer, a senior scientist on the group, said: "Now that we know exactly what we are looking for, we want to find these defects and watch them as we operate the battery, we are still very far from it, but we may be at a new development As a starting point, we can purposefully engineer these defects to make better energy storage materials."
