Thanh-Nhan Tran, Xia Cao, Yaobin Xu, Peiyuan Gao, Hui Zhou, Fenghua Guo, Kee Sung Han, Dianying Liu, Phung ML Le, J. Mark Weller, Mark H. Engelhard, Chongmin Wang, M. Stanley Whittingham, Wu Xu, Ji-Guang Zhang
{"title":"双官能氟化醚增强金属锂电池的循环稳定性","authors":"Thanh-Nhan Tran, Xia Cao, Yaobin Xu, Peiyuan Gao, Hui Zhou, Fenghua Guo, Kee Sung Han, Dianying Liu, Phung ML Le, J. Mark Weller, Mark H. Engelhard, Chongmin Wang, M. Stanley Whittingham, Wu Xu, Ji-Guang Zhang","doi":"10.1002/adfm.202407012","DOIUrl":null,"url":null,"abstract":"<p>The lifespan of lithium (Li) metal batteries (LMBs) can be greatly improved by the formation of inorganic-rich electrode-electrolyte interphases (EEIs) (including solid-electrolyte interphase on anode and cathode-electrolyte interphase on cathode). In this work, a localized high-concentration electrolyte containing lithium bis(fluorosulfonyl)imide (LiFSI) salt, 1,2-dimethoxyethane (DME) solvent and 1,2-bis(1,1,2,2-tetrafluoroethoxy)ethane (BTFEE) diluent is optimized. BTFEE is a fluorinated ether with weakly-solvating ability for LiFSI so it also acts as a co-solvent in this electrolyte. It can facilitate anion decomposition at electrode surfaces and promote the formation of more inorganic-rich EEI layers. With an optimized molar ratio of LiFSI:DME:BTFEE = 1:1.15:3, LMBs with a high loading (4 mAh cm<sup>−2</sup>) lithium nickel manganese cobalt oxide (LiNi<sub>0.8</sub> Mn<sub>0.1</sub> Co<sub>0.1</sub>) cathode can retain 80% capacity in 470 cycles when cycled in a voltage range of 2.8–4.4 V. The fundamental understanding on the functionality of BTFEE revealed in this work provides new perspectives on the design of practical high-energy density battery systems.</p>","PeriodicalId":112,"journal":{"name":"Advanced Functional Materials","volume":null,"pages":null},"PeriodicalIF":18.5000,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202407012","citationCount":"0","resultStr":"{\"title\":\"Enhancing Cycling Stability of Lithium Metal Batteries by a Bifunctional Fluorinated Ether\",\"authors\":\"Thanh-Nhan Tran, Xia Cao, Yaobin Xu, Peiyuan Gao, Hui Zhou, Fenghua Guo, Kee Sung Han, Dianying Liu, Phung ML Le, J. Mark Weller, Mark H. Engelhard, Chongmin Wang, M. Stanley Whittingham, Wu Xu, Ji-Guang Zhang\",\"doi\":\"10.1002/adfm.202407012\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>The lifespan of lithium (Li) metal batteries (LMBs) can be greatly improved by the formation of inorganic-rich electrode-electrolyte interphases (EEIs) (including solid-electrolyte interphase on anode and cathode-electrolyte interphase on cathode). In this work, a localized high-concentration electrolyte containing lithium bis(fluorosulfonyl)imide (LiFSI) salt, 1,2-dimethoxyethane (DME) solvent and 1,2-bis(1,1,2,2-tetrafluoroethoxy)ethane (BTFEE) diluent is optimized. BTFEE is a fluorinated ether with weakly-solvating ability for LiFSI so it also acts as a co-solvent in this electrolyte. It can facilitate anion decomposition at electrode surfaces and promote the formation of more inorganic-rich EEI layers. With an optimized molar ratio of LiFSI:DME:BTFEE = 1:1.15:3, LMBs with a high loading (4 mAh cm<sup>−2</sup>) lithium nickel manganese cobalt oxide (LiNi<sub>0.8</sub> Mn<sub>0.1</sub> Co<sub>0.1</sub>) cathode can retain 80% capacity in 470 cycles when cycled in a voltage range of 2.8–4.4 V. The fundamental understanding on the functionality of BTFEE revealed in this work provides new perspectives on the design of practical high-energy density battery systems.</p>\",\"PeriodicalId\":112,\"journal\":{\"name\":\"Advanced Functional Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":18.5000,\"publicationDate\":\"2024-07-03\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://onlinelibrary.wiley.com/doi/epdf/10.1002/adfm.202407012\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Advanced Functional Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://onlinelibrary.wiley.com/doi/10.1002/adfm.202407012\",\"RegionNum\":1,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"CHEMISTRY, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Advanced Functional Materials","FirstCategoryId":"88","ListUrlMain":"https://onlinelibrary.wiley.com/doi/10.1002/adfm.202407012","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"CHEMISTRY, MULTIDISCIPLINARY","Score":null,"Total":0}
Enhancing Cycling Stability of Lithium Metal Batteries by a Bifunctional Fluorinated Ether
The lifespan of lithium (Li) metal batteries (LMBs) can be greatly improved by the formation of inorganic-rich electrode-electrolyte interphases (EEIs) (including solid-electrolyte interphase on anode and cathode-electrolyte interphase on cathode). In this work, a localized high-concentration electrolyte containing lithium bis(fluorosulfonyl)imide (LiFSI) salt, 1,2-dimethoxyethane (DME) solvent and 1,2-bis(1,1,2,2-tetrafluoroethoxy)ethane (BTFEE) diluent is optimized. BTFEE is a fluorinated ether with weakly-solvating ability for LiFSI so it also acts as a co-solvent in this electrolyte. It can facilitate anion decomposition at electrode surfaces and promote the formation of more inorganic-rich EEI layers. With an optimized molar ratio of LiFSI:DME:BTFEE = 1:1.15:3, LMBs with a high loading (4 mAh cm−2) lithium nickel manganese cobalt oxide (LiNi0.8 Mn0.1 Co0.1) cathode can retain 80% capacity in 470 cycles when cycled in a voltage range of 2.8–4.4 V. The fundamental understanding on the functionality of BTFEE revealed in this work provides new perspectives on the design of practical high-energy density battery systems.
期刊介绍:
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