Monolithic solid–electrolyte interphases formed in fluorinated orthoformate-based electrolytes minimize Li depletion and pulverization

被引:35
作者
Xia Cao
Xiaodi Ren
Lianfeng Zou
Mark H. Engelhard
William Huang
Hansen Wang
Bethany E. Matthews
Hongkyung Lee
Chaojiang Niu
Bruce W. Arey
Yi Cui
Chongmin Wang
Jie Xiao
Jun Liu
Wu Xu
Ji-Guang Zhang
机构
[1] Pacific Northwest National Laboratory,Energy and Environment Directorate
[2] Pacific Northwest National Laboratory,Environmental Molecular Sciences Laboratory
[3] Stanford University,Department of Materials Science and Engineering
来源
Nature Energy | 2019年 / 4卷
关键词
D O I
暂无
中图分类号
学科分类号
摘要
Lithium (Li) pulverization and associated large volume expansion during cycling is one of the most critical barriers for the safe operation of Li-metal batteries. Here, we report an approach to minimize the Li pulverization using an electrolyte based on a fluorinated orthoformate solvent. The solid–electrolyte interphase (SEI) formed in this electrolyte clearly exhibits a monolithic feature, which is in sharp contrast with the widely reported mosaic- or multilayer-type SEIs that are not homogeneous and could lead to uneven Li stripping/plating and fast Li and electrolyte depletion over cycling. The highly homogeneous and amorphous SEI not only prevents dendritic Li formation, but also minimizes Li loss and volumetric expansion. Furthermore, this new electrolyte strongly suppresses the phase transformation of the LiNi0.8Co0.1Mn0.1O2 cathode (from layered structure to rock salt) and stabilizes its structure. Tests of high-voltage Li||NMC811 cells show long-term cycling stability and high rate capability, as well as reduced safety concerns.
引用
收藏
页码:796 / 805
页数:9
相关论文
共 81 条
[1]  
Whittingham MS(2014)Ultimate limits to intercalation reactions for lithium batteries Chem. Rev. 114 11414-11443
[2]  
Liu J(2019)Pathways for practical high-energy long-cycling lithium metal batteries Nat. Energy 4 180-186
[3]  
Lin D(2017)Reviving the lithium metal anode for high-energy batteries Nat. Nanotechnol. 12 194-206
[4]  
Liu Y(2016)Superconcentrated electrolytes for a high-voltage lithium-ion battery Nat. Commun. 7 A2424-A2438
[5]  
Cui Y(2015)Review—development of advanced rechargeable batteries: a continuous challenge in the choice of suitable electrolyte solutions J. Electrochem. Soc. 162 10403-10473
[6]  
Wang J(2017)Toward safe lithium metal anode in rechargeable batteries: a review Chem. Rev. 117 2149-2153
[7]  
Erickson EM(2017)Conductivity, viscosity, and their correlation of a super-concentrated aqueous electrolyte J. Phys. Chem. C. 121 833-845
[8]  
Cheng X-B(2018)Advancing lithium metal batteries Joule 2 783-791
[9]  
Zhang R(2018)Tuning the electrolyte network structure to invoke quasi-solid state sulfur conversion and suppress lithium dendrite formation in Li–S batteries Nat. Energy 3 1548-1558
[10]  
Zhao C-Z(2018)High-efficiency lithium metal batteries with fire-retardant electrolytes Joule 2 1877-1892