Gawon Song, Suyeon Lee, Taehun Kim, Min Soo Jung, Kanghyeon Kim, Seung Hyun Choi, Seunghyun Lee, Junsung Park, Minseon Lee, Chanhwi Park, Mi-Sook Kwon, Kyu Tae Lee
{"title":"富锂离子和锰离子纳米结构层状氧化物的机械电化学行为与硫化物全固态电池的优异容量保持率和电压衰减特性","authors":"Gawon Song, Suyeon Lee, Taehun Kim, Min Soo Jung, Kanghyeon Kim, Seung Hyun Choi, Seunghyun Lee, Junsung Park, Minseon Lee, Chanhwi Park, Mi-Sook Kwon, Kyu Tae Lee","doi":"10.1002/aenm.202403374","DOIUrl":null,"url":null,"abstract":"Li- and Mn-rich layered oxides (LMROs) are recognized as promising cathode materials for lithium-ion batteries (LIBs) due to their high specific capacity and cost efficiency. However, LMROs encounter challenges such as manganese dissolution in electrolytes and the release of oxygen gas from irreversible oxygen redox reactions, leading to structural degradation and voltage decay that reduce energy density. Consequently, recent research has shifted toward employing LMROs in all-solid-state batteries (ASSBs), where Mn dissolution is negligible. Herein, nanostructured LMROs demonstrate superior electrochemical compatibility with sulfide-based solid electrolytes in ASSBs compared to conventional LIBs. Nanostructured LMRO exhibits outstanding capacity retention (97.1% after 1300 cycles at 30 °C) with significantly suppressed voltage decay. Furthermore, the initial electrochemical activation of Li<sub>2</sub>MnO<sub>3</sub> domains within LMRO is explored in terms of the mechano-electrochemical interactions in the composite cathode. At elevated temperatures, interfacial degradation accelerates due to the chemical oxidation of Li<sub>6</sub>PS<sub>5</sub>Cl solid electrolytes, driven by oxygen released from LMRO. To address this, LMRO surfaces are modified with thioglycolic acid through esterification, suppressing interfacial degradation of Li<sub>6</sub>PS<sub>5</sub>Cl and ensuring stable capacity retention over 500 cycles at 60 °C. These findings underscore the potential of LMRO materials as promising cathode options for ASSBs, surpassing those used in LIBs.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":null,"pages":null},"PeriodicalIF":24.4000,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Mechano-Electrochemical Behavior of Nanostructured Li- and Mn-Rich Layered Oxides with Superior Capacity Retention and Voltage Decay for Sulfide-Based All-Solid-State Batteries\",\"authors\":\"Gawon Song, Suyeon Lee, Taehun Kim, Min Soo Jung, Kanghyeon Kim, Seung Hyun Choi, Seunghyun Lee, Junsung Park, Minseon Lee, Chanhwi Park, Mi-Sook Kwon, Kyu Tae Lee\",\"doi\":\"10.1002/aenm.202403374\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Li- and Mn-rich layered oxides (LMROs) are recognized as promising cathode materials for lithium-ion batteries (LIBs) due to their high specific capacity and cost efficiency. However, LMROs encounter challenges such as manganese dissolution in electrolytes and the release of oxygen gas from irreversible oxygen redox reactions, leading to structural degradation and voltage decay that reduce energy density. Consequently, recent research has shifted toward employing LMROs in all-solid-state batteries (ASSBs), where Mn dissolution is negligible. Herein, nanostructured LMROs demonstrate superior electrochemical compatibility with sulfide-based solid electrolytes in ASSBs compared to conventional LIBs. Nanostructured LMRO exhibits outstanding capacity retention (97.1% after 1300 cycles at 30 °C) with significantly suppressed voltage decay. Furthermore, the initial electrochemical activation of Li<sub>2</sub>MnO<sub>3</sub> domains within LMRO is explored in terms of the mechano-electrochemical interactions in the composite cathode. At elevated temperatures, interfacial degradation accelerates due to the chemical oxidation of Li<sub>6</sub>PS<sub>5</sub>Cl solid electrolytes, driven by oxygen released from LMRO. To address this, LMRO surfaces are modified with thioglycolic acid through esterification, suppressing interfacial degradation of Li<sub>6</sub>PS<sub>5</sub>Cl and ensuring stable capacity retention over 500 cycles at 60 °C. 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Mechano-Electrochemical Behavior of Nanostructured Li- and Mn-Rich Layered Oxides with Superior Capacity Retention and Voltage Decay for Sulfide-Based All-Solid-State Batteries
Li- and Mn-rich layered oxides (LMROs) are recognized as promising cathode materials for lithium-ion batteries (LIBs) due to their high specific capacity and cost efficiency. However, LMROs encounter challenges such as manganese dissolution in electrolytes and the release of oxygen gas from irreversible oxygen redox reactions, leading to structural degradation and voltage decay that reduce energy density. Consequently, recent research has shifted toward employing LMROs in all-solid-state batteries (ASSBs), where Mn dissolution is negligible. Herein, nanostructured LMROs demonstrate superior electrochemical compatibility with sulfide-based solid electrolytes in ASSBs compared to conventional LIBs. Nanostructured LMRO exhibits outstanding capacity retention (97.1% after 1300 cycles at 30 °C) with significantly suppressed voltage decay. Furthermore, the initial electrochemical activation of Li2MnO3 domains within LMRO is explored in terms of the mechano-electrochemical interactions in the composite cathode. At elevated temperatures, interfacial degradation accelerates due to the chemical oxidation of Li6PS5Cl solid electrolytes, driven by oxygen released from LMRO. To address this, LMRO surfaces are modified with thioglycolic acid through esterification, suppressing interfacial degradation of Li6PS5Cl and ensuring stable capacity retention over 500 cycles at 60 °C. These findings underscore the potential of LMRO materials as promising cathode options for ASSBs, surpassing those used in LIBs.
期刊介绍:
Established in 2011, Advanced Energy Materials is an international, interdisciplinary, English-language journal that focuses on materials used in energy harvesting, conversion, and storage. It is regarded as a top-quality journal alongside Advanced Materials, Advanced Functional Materials, and Small.
With a 2022 Impact Factor of 27.8, Advanced Energy Materials is considered a prime source for the best energy-related research. The journal covers a wide range of topics in energy-related research, including organic and inorganic photovoltaics, batteries and supercapacitors, fuel cells, hydrogen generation and storage, thermoelectrics, water splitting and photocatalysis, solar fuels and thermosolar power, magnetocalorics, and piezoelectronics.
The readership of Advanced Energy Materials includes materials scientists, chemists, physicists, and engineers in both academia and industry. The journal is indexed in various databases and collections, such as Advanced Technologies & Aerospace Database, FIZ Karlsruhe, INSPEC (IET), Science Citation Index Expanded, Technology Collection, and Web of Science, among others.