{"id":642282,"date":"2024-10-23T11:17:03","date_gmt":"2024-10-23T08:17:03","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/researchers-propose-sn-based-materials-as-superior-anodes-for-all-solid-state-li-ion-batteries\/"},"modified":"2024-10-23T11:17:03","modified_gmt":"2024-10-23T08:17:03","slug":"researchers-propose-sn-based-materials-as-superior-anodes-for-all-solid-state-li-ion-batteries","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/researchers-propose-sn-based-materials-as-superior-anodes-for-all-solid-state-li-ion-batteries\/","title":{"rendered":"#Researchers propose Sn-based materials as superior anodes for all-solid-state Li-ion batteries"},"content":{"rendered":"
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\n \"KERI's
\n ‘FeSn2<\/sub>‘ undergoes particle size reduction due to recombination reactions during repeated charging and discharging, which helps maintain close contact between internal solid particles in SSBs over an extended period. Credit: Korea Electrotechnology<\/a> Research Institute
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A study published<\/a> in the journal Joule<\/i> introduces new anode materials for solid-state batteries (SSBs). The research was conducted by the Korea Electrotechnology Research Institute (KERI) in collaboration with Kumoh National Institute of Technology and Inha University.<\/p>\n

SSBs have replaced the combustible liquid electrolyte that transfers ions between the anode and cathode with a solid electrolyte, significantly reducing the risk of fire or explosion. However, SSBs, due to their “solid” nature, require much advanced technology, such as ensuring electro-chemo-mechanical stability during the charging and discharging processes.<\/p>\n

In particular, since the anode has a significant impact on the charging rate and lifespan of the battery, the choice of material is extremely important. Currently, Li-metal is the most extensively researched anode material for SSBs. However, in the case of Li-metal, repeated charging and discharging lead to dendrite growth, where lithium grows in tree-like structures on the surface. This phenomenon can result in internal short circuits, threatening the battery’s lifespan and stability.<\/p>\n

Besides Li-metal, silicon anode materials are also available; however, they face several challenges, including low electronic and ionic conductivity, as well as cracks caused by volumetric expansion.<\/p>\n

The anode materials proposed by KERI and the university team this time are tin(Sn)-based alloy materials, specifically FeSn2<\/sub>. The research team identified through detailed mechanical property analysis that FeSn2<\/sub> exhibits a characteristic of particle size reduction due to recombination reactions during repeated charging and discharging.<\/p>\n

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This confirms that in SSBs, the contact between the internal solid particles is maintained for a long period of time, resulting in a dense and uniform electrode. Even in environments with external stimuli, FeSn2<\/sub> exhibits high elasticity and deformation energy, ensuring good electrochemical stability without cracking.<\/p>\n

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\n \"KERI's
\n Schematic diagram and scanning electron microscope (SEM) images illustrating the reaction behavior of FeSn2<\/sub> anode materials during the cycling process of SSBs. Credit: Korea Electrotechnology Research Institute
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The research team developed a test SSB full cell to validate the technology, utilizing a FeSn2<\/sub> anode, NCM622 (nickel 6, cobalt 2, manga<\/a>nese 2 combination) cathode, and sulfide solid electrolytes (Li6<\/sub>PS5<\/sub>CI). As a result, an areal capacity of 15.54 mAh\/cm2<\/sup> was achieved, which is five times higher than that of conventional lithium-ion batteries.<\/p>\n

Additionally, high-rate charging and discharging were conducted for over 1,000 cycles under three-minute (20C current density) and six-minute (10C current density) conditions, achieving a capacity retention of over 70\u201380%.<\/p>\n

In addition, the research team evaluated the performance of the FeSn2<\/sub> anode in SSBs by app<\/a>lying it to a prototype pouch cell format. A high energy density of over 255 Wh\/kg was recorded, demonstrating its commercial potential.<\/p>\n

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\n \"KERI's
\n Electrochemical performance and energy density of SSBs utilizing FeSn2<\/sub> anode materials. Credit: Korea Electrotechnology Research Institute
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Yoon-Cheol Ha, Director of the Next Generation Battery Research Center at KERI, stated, “Our achievement is significant as it breaks away from the conventional focus on Li-metal and silicon in the research of anode materials for SSBs, demonstrating the great potential of tin-based alloy anode materials.”<\/p>\n

Additionally, Professor Cheol-Min Park of Kumoh National Institute of Technology expressed his ambition, stating, “Through the development of stable high-performance anode materials that surpass existing limitations, we aim to contribute to the commercialization of non-flammable SSBs.”<\/p>\n

\n More information:<\/strong>
\n Young-Han Lee et al, Empowering all-solid-state Li-ion batteries with self-stabilizing Sn-based anodes, Joule<\/i> (2024). DOI: 10.1016\/j.joule.2024.08.011<\/a><\/p>\n
\n Journal information:<\/strong>
\n Joule<\/cite>
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\n Provided by
\n National Research Council of Science<\/a> and Technology
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Citation<\/strong>:
\n Researchers propose Sn-based materials as superior anodes for all-solid-state Li-ion batteries (2024, October 23)
\n retrieved 23 October 2024
\n from https:\/\/techxplore.com\/news<\/a>\/2024-10-sn-based-materials-superior-anodes.html<\/p>\n

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