{"title":"调整弱溶解环醚电解质的溶解结构,实现锂硫化聚丙烯腈电池的宽温循环","authors":"Kameron Liao, Min-Hao Pai, Arumugam Manthiram","doi":"10.1002/aenm.202403733","DOIUrl":null,"url":null,"abstract":"Sulfurized polyacrylonitrile (SPAN) cathodes in high energy-density Li-metal batteries have garnered widespread interest owing to their good cycling stability and moderately high capacities. However, their application is hindered by the low prevalence of advanced electrolytes that can simultaneously mitigate polysulfide generation at the cathode and stabilize the Li-metal anode. Here, a weakly solvating electrolyte is presented, employing a single solvent tetrahydropyran (THP). The solvation structure is effectively tuned by adjusting the salt concentration to stabilize both the Li-metal anode and SPAN cathode. This approach enables stable cycling with high SPAN loadings (≈5 mg cm<sup>−2</sup>) and lean electrolyte contents (≈5 µL mg<sub>SPAN</sub><sup>−1</sup>) across a wide temperature range: 0 °C, room temperature, and 50 °C. A pouch cell with a high SPAN loading and a low electrolyte-to-SPAN (E/SPAN) ratio of 3 µL mg<sup>−1</sup> shows a stable 79.1% capacity retention after 40 cycles. Additionally, THP can be effectively employed in localized high-concentration electrolyte (LHCE) systems to reduce the diluent-to-solvent ratio for greater LHCE viability. The study demonstrates the potential of weakly solvating solvents in Li-SPAN batteries, offering a pathway for their practical application.","PeriodicalId":111,"journal":{"name":"Advanced Energy Materials","volume":null,"pages":null},"PeriodicalIF":24.4000,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Tuning the Solvation Structure of a Weakly Solvating Cyclic Ether Electrolyte for Wide-Temperature Cycling of Lithium-Sulfurized Polyacrylonitrile Batteries\",\"authors\":\"Kameron Liao, Min-Hao Pai, Arumugam Manthiram\",\"doi\":\"10.1002/aenm.202403733\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Sulfurized polyacrylonitrile (SPAN) cathodes in high energy-density Li-metal batteries have garnered widespread interest owing to their good cycling stability and moderately high capacities. However, their application is hindered by the low prevalence of advanced electrolytes that can simultaneously mitigate polysulfide generation at the cathode and stabilize the Li-metal anode. Here, a weakly solvating electrolyte is presented, employing a single solvent tetrahydropyran (THP). The solvation structure is effectively tuned by adjusting the salt concentration to stabilize both the Li-metal anode and SPAN cathode. This approach enables stable cycling with high SPAN loadings (≈5 mg cm<sup>−2</sup>) and lean electrolyte contents (≈5 µL mg<sub>SPAN</sub><sup>−1</sup>) across a wide temperature range: 0 °C, room temperature, and 50 °C. A pouch cell with a high SPAN loading and a low electrolyte-to-SPAN (E/SPAN) ratio of 3 µL mg<sup>−1</sup> shows a stable 79.1% capacity retention after 40 cycles. Additionally, THP can be effectively employed in localized high-concentration electrolyte (LHCE) systems to reduce the diluent-to-solvent ratio for greater LHCE viability. The study demonstrates the potential of weakly solvating solvents in Li-SPAN batteries, offering a pathway for their practical application.\",\"PeriodicalId\":111,\"journal\":{\"name\":\"Advanced Energy Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":24.4000,\"publicationDate\":\"2024-10-21\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Energy Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1002/aenm.202403733\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Energy Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1002/aenm.202403733","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Tuning the Solvation Structure of a Weakly Solvating Cyclic Ether Electrolyte for Wide-Temperature Cycling of Lithium-Sulfurized Polyacrylonitrile Batteries
Sulfurized polyacrylonitrile (SPAN) cathodes in high energy-density Li-metal batteries have garnered widespread interest owing to their good cycling stability and moderately high capacities. However, their application is hindered by the low prevalence of advanced electrolytes that can simultaneously mitigate polysulfide generation at the cathode and stabilize the Li-metal anode. Here, a weakly solvating electrolyte is presented, employing a single solvent tetrahydropyran (THP). The solvation structure is effectively tuned by adjusting the salt concentration to stabilize both the Li-metal anode and SPAN cathode. This approach enables stable cycling with high SPAN loadings (≈5 mg cm−2) and lean electrolyte contents (≈5 µL mgSPAN−1) across a wide temperature range: 0 °C, room temperature, and 50 °C. A pouch cell with a high SPAN loading and a low electrolyte-to-SPAN (E/SPAN) ratio of 3 µL mg−1 shows a stable 79.1% capacity retention after 40 cycles. Additionally, THP can be effectively employed in localized high-concentration electrolyte (LHCE) systems to reduce the diluent-to-solvent ratio for greater LHCE viability. The study demonstrates the potential of weakly solvating solvents in Li-SPAN batteries, offering a pathway for their practical application.
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.