High-voltage nickel-rich layered cathodes in lithium metal batteries enabled by a sulfolane / fluorinated ether/ fluoroethylene carbonate-based electrolyte design

La2O3 Filler's Stabilization of Residual Solvent in Polymer Electrolyte for Advanced Solid‐State Lithium‐Metal Batteries

“…[ 48 ] The cyclic voltammetry (CV) measurements of the assembled LiFePO 4 (LFP)||PVDF‐HFP/La 2 O 3 CPE||Li (Figure 2e) and LFP||PVDF‐HFP SE||Li (Figure 2f) were performed at room temperature from 2.5 to 4.0 V. The CV curves of LFP||PVDF‐HFP/La 2 O 3 CPE||Li are basically overlapped, indicating the superior electrochemical stability of the composite electrolyte membrane. [ 51 ]…”

“…[48] The cyclic voltammetry (CV) measurements of the assembled LiFePO 4 (LFP)||PVDF-HFP/La 2 O 3 CPE||Li (Figure 2e) and LFP||PVDF-HFP SE||Li (Figure 2f ) were performed at room temperature from 2.5 to 4.0 V. The CV curves of LFP||PVDF-HFP/La 2 O 3 CPE||Li are basically overlapped, indicating the superior electrochemical stability of the composite electrolyte membrane. [51] Good mechanical strength is an important property of SEs. The tensile strengths of obtained PVDF-HFP SE and PVDF-HFP/La 2 O 3 CPE were investigated and are presented in Figure S5, Supporting Information.…”

Enabling highly stable lithium metal batteries by using dual-function additive catalyzed in-built quasi-solid-state polymer electrolytes

“…56 The F 1s spectra exhibit two obvious peaks at around 686.6 and 684.9 eV, which are attributed to the Li x PF y O z group and lithium uoride (LiF) due to the decomposition of LiPF 6 , respectively. 57,58 Previous studies on lithium metal electrodes have shown that the SEI layer formed by lithium in a conventional LiPF 6carbonate electrolyte is porous, friable and partially soluble, and therefore easily cracked during cycling. [59][60][61] It shows that LiF ($684.9 eV) and C-F ($688.6 eV) are covered on the surface of Li metal when using DOL-FEC as the electrolyte (Fig.…”

Vital roles of fluoroethylene carbonate in electrochemical energy storage devices: a review

“…7(d), 151 thus improving the performance for high voltage LiNi x Co y Mn z O 2 -based batteries, such as 1 M LiPF 6 –FEC/HFDEC (5 : 5 by vol) + 1 wt% LiDFOB (HFDEC was bis(2,2,2-trifluoroethyl) carbonate) for 4.6 V graphite/LiNi 0.5 Co 0.2 Mn 0.3 O 2 batteries, 60 1 M LiPF 6 –FEC/EFA (3 : 7 by vol) (EFA was ethyl difluoroacetate) for 4.4 V Li/LiNi 0.8 Co 0.1 Mn 0.1 O 2 batteries, 151 and 1 M LiTFSI–FEC/SL/HFE (0.05 : 0.475 : 0.475 by vol) (SL, HFE was sulfolane and 1,1,2,2-tetrafluoroethyl 2,2,3,3-tetrafluoropropyl ether, respectively) for 4.7 V Li/LiNi 0.8 Co 0.1 Mn 0.1 O 2 batteries. 96…”