High-Safety and High-Energy-Density Lithium Metal Batteries in a Novel Ionic-Liquid Electrolyte

Sun，Hao1; Zhu，Guanzhou1; Zhu，Yuanmin2; Lin，Meng Chang3; Chen，Hui3; Li，Yuan Yao1,4; Hung，Wei Hsuan1,5; Zhou，Bo6; Wang，Xi7; Bai，Yunxiang1; Gu，Meng2; Huang，Cheng Liang4; Tai，Hung Chun4; Xu，Xintong1; Angell，Michael1; Shyue，Jing Jong8; Dai，Hongjie1

2020

10.1002/adma.202001741

ADVANCED MATERIALS   影响因子和分区

0935-9648

1521-4095

Rechargeable lithium metal batteries are next generation energy storage devices with high energy density, but face challenges in achieving high energy density, high safety, and long cycle life. Here, lithium metal batteries in a novel nonflammable ionic-liquid (IL) electrolyte composed of 1-ethyl-3-methylimidazolium (EMIm) cations and high-concentration bis(fluorosulfonyl)imide (FSI) anions, with sodium bis(trifluoromethanesulfonyl)imide (NaTFSI) as a key additive are reported. The Na ion participates in the formation of hybrid passivation interphases and contributes to dendrite-free Li deposition and reversible cathode electrochemistry. The electrolyte of low viscosity allows practically useful cathode mass loading up to ≈16 mg cm. Li anodes paired with lithium cobalt oxide (LiCoO) and lithium nickel cobalt manganese oxide (LiNiCoMnO, NCM 811) cathodes exhibit 99.6–99.9% Coulombic efficiencies, high discharge voltages up to 4.4 V, high specific capacity and energy density up to ≈199 mAh g and ≈765 Wh kg respectively, with impressive cycling performances over up to 1200 cycles. Highly stable passivation interphases formed on both electrodes in the novel IL electrolyte are the key to highly reversible lithium metal batteries, especially for Li–NMC 811 full batteries.

high-energy-density batteries ionic-liquid electrolytes lithium metal batteries

SCI ; EI

英语

NI期刊 ; NI论文 ; ESI高被引

其他

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:000535015500001

WILEY-V C H VERLAG GMBH

20202208770757

Cathodes ; Manganese oxide ; Electrolytes ; Lithium batteries ; Nickel oxide ; Ionic liquids ; Lithium compounds ; Metals ; Passivation

Protection Methods:539.2.1 ; Electric Batteries and Fuel Cells:702 ; Primary Batteries:702.1.1 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804 ; Inorganic Compounds:804.2

MATERIALS SCIENCE

2-s2.0-85085562922

Scopus

1.Department of Chemistry,Stanford University,Stanford,94305,United States
2.Department of Materials Science and Engineering Academy for Advanced Interdisciplinary Studies,Southern University of Science and Technology,Shenzhen,518055,China
3.College of Electrical Engineering and Automation,Shandong University of Science and Technology,Qingdao,266590,China
4.Department of Chemical Engineering,National Chung Cheng University,Chiayi,62102,Taiwan
5.Institute of Materials Science and Engineering,National Central University,Taoyuan,32001,Taiwan
6.Chemistry and Chemical Engineering Guangdong Laboratory,Shantou,515031,China
7.Key Laboratory of Luminescence and Optical Information Ministry of Education,Department of Physics,School of Science,Beijing Jiaotong University,Beijing,100044,China
8.Research Center for Applied Sciences,Academia Sinica,Taipei,11529,Taiwan

Sun，Hao,Zhu，Guanzhou,Zhu，Yuanmin,et al. High-Safety and High-Energy-Density Lithium Metal Batteries in a Novel Ionic-Liquid Electrolyte[J]. ADVANCED MATERIALS,2020,32(26).

Sun，Hao.,Zhu，Guanzhou.,Zhu，Yuanmin.,Lin，Meng Chang.,Chen，Hui.,...&Dai，Hongjie.(2020).High-Safety and High-Energy-Density Lithium Metal Batteries in a Novel Ionic-Liquid Electrolyte.ADVANCED MATERIALS,32(26).

Sun，Hao,et al."High-Safety and High-Energy-Density Lithium Metal Batteries in a Novel Ionic-Liquid Electrolyte".ADVANCED MATERIALS 32.26(2020).