Tissue paper‑based composite separator using double-crosslinked polymer electrolyte as coating layer for lithium-ion battery with superior ion transport and cyclic stability

POLY(Amidoamine) Dendrimer-Induced 3D Crosslinked Network Binder For LiFePO4 Cathode: Endowing Battery With Superior Cycling Stability

“…There are abundant amine groups in PAMAM, 11 which can afford alkaline environment, thus inducing the departure of HF from PVDF-HFP and subsequent Michael addition occurred between PAMAM and PVDF-HFP. 2,13,14,18,19 As previous reported, [7][8][9]14 this reaction will produce new chemical bonds C=N as crosslinked points and further be deepened during drying cathodes. Figure 2(a) shows the rheological data of the pre-crosslinking solution.…”

“…3,6 However, it is very easy to be swollen or even dissolved by carbonate electrolyte, which will lose original structure and make conductive network collapse during cycling, further leading to inferior C-rate and cyclic stability. [3][4][5] In our previous work, [7][8][9] crosslinked polymer network based on fluorinated polymer has been constructed to enhance structural stability of coating layer on separator through the introduction of crosslinking agent containing many amine groups. [10][11][12] This encourages us to explore the potential of three-dimensional (3D) crosslinked binder applied in LiFePO 4 cathode.…”