DOI: 10.1016/j.scib.2019.11.014
论文题名: DMF stabilized Li3N slurry for manufacturing self-prelithiatable lithium-ion capacitors
作者: Liu C. ; Li T. ; Zhang H. ; Song Z. ; Qu C. ; Hou G. ; Zhang H. ; Ni C. ; Li X.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期: 6 起始页码: 434
结束页码: 442
语种: 英语
中文关键词: High specific energy and long cycle life
; Li3N
; Lithium-ion capacitors
; Pre-lithiation
; Soft package
英文关键词: Dimethylformamide
; Electrodes
; Ions
; Lithium
; Manufacture
; Organic solvents
; Supercapacitor
; Aprotic polar solvents
; Experiment analysis
; Li3N
; Lithium-ion capacitors
; Long cycles
; N ,N-Dimethylformamide
; Positive electrodes
; Pre-lithiation
; Lithium compounds
英文摘要: Li3N is an excellent zero-residue positive electrode pre-lithiation additive to offset the initial lithium loss in lithium-ion capacitors. However, Li3N has an intrinsic problem of poor compatibility with commonly used aprotic polar solvents in electrode manufacture procedure due to its high reactivity with commonly used solvents like N-methy-2-pyrrolidone (NMP) and etc. It is the Valley of Death between research and large-scale commercialization of Li-ion capacitors using Li3N as prelithiation agent. In this work, Li3N containing electrode is prepared by a commercially adoptable route for the first time, using N,N-dimethylformamide (DMF) to homogenate the electrode slurry. The DMF molecular stabilizing mechanism is confirmed via experiment analysis and DFT simulation, indicating that the dehydrogenation energy for DMF is obviously larger than other commonly used solvents such as NMP and etc. The soft package lithium-ion capacitors (LIC250) with only 12 wt% Li3N addition in AC positive electrode exhibits excellent rate capability, cyclic stability and ultrahigh specific energy. Its specific energy is 2.3 times higher than the Li3N-free devices, with energy retention as high as 90% after 10,000 cycles. © 2019 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169981
Appears in Collections: 气候变化与战略
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作者单位: Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; Solid-state NMR & Catalytic Chemistry Group, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China; Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Shanghai, 200032, China
Recommended Citation:
Liu C.,Li T.,Zhang H.,et al. DMF stabilized Li3N slurry for manufacturing self-prelithiatable lithium-ion capacitors[J]. Science Bulletin,2020-01-01,65(6)