Polycationic Polymer Layer for Air‐Stable and Dendrite‐Free Li Metal Anodes in Carbonate Electrolytes

Abstract

Figure 3. a) N 1s and b) F 1s XPS spectra of SEI formed on the PDDA-TFSI@Cu, poly(EVIm-TFSI)@Cu, PDMA-TFSI@Cu, and bare Cu electrodes. c) Nucleation overpotentials of Li deposition on bare Cu electrode and the PIL-coated electrodes. d) Coulombic efficiency of Li/Cu half-cells using the bare Cu electrode and the PIL-coated electrodes at 0.5 mA cm −2 with a plating capacity of 1 mAh cm −2. e,f) Potential profiles of various electrodes at the 50th (e) and 100th (f) cycles.

From Fundamental Understanding to Engineering Design of High‐Performance Thick Electrodes for Scalable Energy‐Storage Systems

“…The increase of AM loading is usually at the expense of lower deployable capacity and larger overpotential. [ 20,21 ] Moreover, high AM loading also has an adverse effect on the Li anode stability, [ 22,23 ] which is omitted in this discussion, as we will only focus on the cathode design parameters. It is reasonable to assume that every 10 mg cm –2 increase in NMC loading results in a 5 mAh g –1 loss of discharge capacity and a 2 mV drop of discharge voltage.…”

Synergistic improvement of the overall performance of lithium-sulfur batteries

“…PDDA-TFSI@Li/NMC811 和 Li/NMC811 在 0.5~8 C 下的倍率性能 [100] 。(e) 不同处理方 法在铜箔上沉积 Li 的示意图：(上)未加保护，沉积后在铜箔上形成多孔 Li 枝晶和缺锂 层；(下)用 β-PF 膜修饰，该膜可作为锂离子泵调节锂离子的均匀分布 [101] 。(f) 以 Li 箔 (蓝色)、Li@α-PF(红色)和 Li@β-PF(黑色)为负极的 Li-S 全电池在 0.2 C 下的循环性能对 比图 [101] on (a) the bare Cu and (b)PDDA-TFSI@Cu electrodes at 1 mA cm −2 . Scale bar, 20 μm [100] . (c) Schematic illustration of the Li deposition process based on (upper) the bare anode and (lower)…”

“…the PIL-coated electrode [100] . (d) Rate performance of PDDA-TFSI@Li/NMC811 and Li/NMC811 at various rates from 0.5 to 8 C [100] .…”

“…the PIL-coated electrode [100] . (d) Rate performance of PDDA-TFSI@Li/NMC811 and Li/NMC811 at various rates from 0.5 to 8 C [100] . (e) Schematic illustration of Li deposition on Cu foil with different treatments: (upper) without protection, leading to the formation of porous Li dendrite and Li-ion deficient layer on the Cu foil after deposition; (lower) with β-PF film modification, serving as the Li-ion pump to regulate the uniform distribution of Li ions [101] .…”

Long-chain fluorocarbon-driven hybrid solid polymer electrolyte for lithium metal batteries

“…1b). 32 This work provides a novel polymer electrolyte with high ionic conductivity (6.78 × 10 −4 S cm −1 at 25 °C) and its all-solid-state battery application.…”