Kai Lan, Jancong Cheng, XinXin Yang, Jingmin Fan, Mingseng Zheng, Ruming Yuan and Quanfeng Dong
{"title":"通过定制电解质系统实现安全的高压锂金属电池","authors":"Kai Lan, Jancong Cheng, XinXin Yang, Jingmin Fan, Mingseng Zheng, Ruming Yuan and Quanfeng Dong","doi":"10.1039/D4TA02958E","DOIUrl":null,"url":null,"abstract":"<p >Lithium-metal batteries (LMBs) with a Ni-rich high-voltage cathode enable the delivery of a high energy density. However, a persistent challenge lies in the instability of the electrode–electrolyte interface leading to shortened cycling lifespans and heightened safety concerns. Herein, based on a non-flammable solvent, we designed a weakly solvating non-flammable electrolyte system, with high ionic conductivity, in which a safe high-voltage lithium battery has been achieved. By regulating the solvating structure of the electrolyte, a stable and robust electrode–electrolyte interface at both the lithium metal anode and high-voltage cathode can be built. In the designed electrolyte, the decomposition of anions and fluorinated ethylene carbonate (FEC) as film-formers is simultaneously facilitated at the electrode surface by employing a weakly coordinated co-solvent. The anion and FEC co-derived chemical interface enriched with lithium fluoride enables a high lithium deposition–stripping Coulombic efficiency of 99.06% and stable cycling of a 4.7 V LiNi<small><sub>0.8</sub></small>Mn<small><sub>0.1</sub></small>Co<small><sub>0.1</sub></small>O<small><sub>2</sub></small> cathode. The composed LMBs achieve an energy density of 692 W h kg<small><sup>−1</sup></small> at the electrode level (based on the total mass of cathode and anode materials). The strategy reported in this work points out a promising way to develop safe and high energy density LMBs.</p>","PeriodicalId":82,"journal":{"name":"Journal of Materials Chemistry A","volume":null,"pages":null},"PeriodicalIF":10.7000,"publicationDate":"2024-07-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Achieving safe high-voltage lithium-metal batteries by tailoring electrolyte systems†\",\"authors\":\"Kai Lan, Jancong Cheng, XinXin Yang, Jingmin Fan, Mingseng Zheng, Ruming Yuan and Quanfeng Dong\",\"doi\":\"10.1039/D4TA02958E\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p >Lithium-metal batteries (LMBs) with a Ni-rich high-voltage cathode enable the delivery of a high energy density. However, a persistent challenge lies in the instability of the electrode–electrolyte interface leading to shortened cycling lifespans and heightened safety concerns. Herein, based on a non-flammable solvent, we designed a weakly solvating non-flammable electrolyte system, with high ionic conductivity, in which a safe high-voltage lithium battery has been achieved. By regulating the solvating structure of the electrolyte, a stable and robust electrode–electrolyte interface at both the lithium metal anode and high-voltage cathode can be built. In the designed electrolyte, the decomposition of anions and fluorinated ethylene carbonate (FEC) as film-formers is simultaneously facilitated at the electrode surface by employing a weakly coordinated co-solvent. The anion and FEC co-derived chemical interface enriched with lithium fluoride enables a high lithium deposition–stripping Coulombic efficiency of 99.06% and stable cycling of a 4.7 V LiNi<small><sub>0.8</sub></small>Mn<small><sub>0.1</sub></small>Co<small><sub>0.1</sub></small>O<small><sub>2</sub></small> cathode. The composed LMBs achieve an energy density of 692 W h kg<small><sup>−1</sup></small> at the electrode level (based on the total mass of cathode and anode materials). The strategy reported in this work points out a promising way to develop safe and high energy density LMBs.</p>\",\"PeriodicalId\":82,\"journal\":{\"name\":\"Journal of Materials Chemistry A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":10.7000,\"publicationDate\":\"2024-07-23\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Chemistry A\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://pubs.rsc.org/en/content/articlelanding/2024/ta/d4ta02958e\",\"RegionNum\":2,\"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":"Journal of Materials Chemistry A","FirstCategoryId":"88","ListUrlMain":"https://pubs.rsc.org/en/content/articlelanding/2024/ta/d4ta02958e","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Achieving safe high-voltage lithium-metal batteries by tailoring electrolyte systems†
Lithium-metal batteries (LMBs) with a Ni-rich high-voltage cathode enable the delivery of a high energy density. However, a persistent challenge lies in the instability of the electrode–electrolyte interface leading to shortened cycling lifespans and heightened safety concerns. Herein, based on a non-flammable solvent, we designed a weakly solvating non-flammable electrolyte system, with high ionic conductivity, in which a safe high-voltage lithium battery has been achieved. By regulating the solvating structure of the electrolyte, a stable and robust electrode–electrolyte interface at both the lithium metal anode and high-voltage cathode can be built. In the designed electrolyte, the decomposition of anions and fluorinated ethylene carbonate (FEC) as film-formers is simultaneously facilitated at the electrode surface by employing a weakly coordinated co-solvent. The anion and FEC co-derived chemical interface enriched with lithium fluoride enables a high lithium deposition–stripping Coulombic efficiency of 99.06% and stable cycling of a 4.7 V LiNi0.8Mn0.1Co0.1O2 cathode. The composed LMBs achieve an energy density of 692 W h kg−1 at the electrode level (based on the total mass of cathode and anode materials). The strategy reported in this work points out a promising way to develop safe and high energy density LMBs.
期刊介绍:
The Journal of Materials Chemistry A, B & C covers a wide range of high-quality studies in the field of materials chemistry, with each section focusing on specific applications of the materials studied. Journal of Materials Chemistry A emphasizes applications in energy and sustainability, including topics such as artificial photosynthesis, batteries, and fuel cells. Journal of Materials Chemistry B focuses on applications in biology and medicine, while Journal of Materials Chemistry C covers applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry A include catalysis, green/sustainable materials, sensors, and water treatment, among others.