Composition and Structure Design of Poly(vinylidene fluoride)‐Based Solid Polymer Electrolytes for Lithium Batteries

Abstract

other areas, and play an important role in energy storage and conversion fields. [1][2][3][4][5][6][7] Nonetheless, the constantly expanding consumption market proposes higher demands for energy density and safety of LIBs, which encourages researchers to ulteriorly improve and optimize the existing LIBs system. The regulation of high-capacity electrode materials and wide operating voltage windows becomes the key to obtaining high energy density storage. In recent years, lithium metal anode has presented great application potential owing to the excellent theoretical specific capacity (3860 mA h g −1 ) and low electrode potential (−3.04 V vs standard hydrogen electrode (SHE)). The batteries assembled by lithium metal anode and high-capacity cathodes or high voltage cathodes achieve higher energy storage compared with traditional commercial LIBs. [8][9][10][11] However, lithium metal batteries (LMBs) have been suffering from liquid organic electrolyte safety issues. Generally, the volatile and flammable liquid organic electrolytes are easy to burn and burst when the batteries receive a violent impact or damage. [12][13][14] Uncontrolled lithium dendrites growth continuously consumes the electrolytes and increases the risk of short circuits. [15][16][17][18] Besides, liquid organic electrolytes are unstable in

Tailoring composite gel polymer electrolytes with regularly arranged pores and silica particles for sodium metal batteries via breath-figure self-assembly

“…The P-P3S7 cell exhibited better rate capability than the GF cell, presumably because uniform Na + conduction and dendrite suppression enabled by the P-P3S7 effectively reduced the ohmic polarization. 53 In contrast, the N-P3S7 displayed poor rate properties, particularly under high current densities, which is associated with the irregular distribution of pores and silica particles. Furthermore, the P-P3S7 cell showed improved long-term cycling performance at 60 °C with stable coulombic efficiencies compared to the GF cell (Fig.…”

Achieving a high loading of cathode in PVDF-based solid-state battery

“…9,10 In comparison with other SPEs, polyvinylidene fluoride (PVDF) solid polymer electrolytes have excellent flexibility and mechanical properties, along with high electrochemical and thermal stability, giving them great application potential in SSLMBs. 11 It is generally recognized that the [Li(DMF) x ] + solution structure is formed by complexing trace amounts of residual N,N-dimethylformamide (DMF) molecules in the PVDF electrolyte with lithium ions (Li + ), and the Li + is transported through the interaction between [Li(DMF) x ] + and PVDF chains. 12,13 After years of effort, the ionic conductivity, mechanical strength and electrochemical stability window of PVDF-based electrolytes have been improved to a considerable level 11 through inorganic filler modification, [14][15][16][17][18] organic polymer grafting, [19][20][21] liquid additives 22,23 and electrode/electrolyte interface design.…”

“…11 It is generally recognized that the [Li(DMF) x ] + solution structure is formed by complexing trace amounts of residual N,N-dimethylformamide (DMF) molecules in the PVDF electrolyte with lithium ions (Li + ), and the Li + is transported through the interaction between [Li(DMF) x ] + and PVDF chains. 12,13 After years of effort, the ionic conductivity, mechanical strength and electrochemical stability window of PVDF-based electrolytes have been improved to a considerable level 11 through inorganic filler modification, [14][15][16][17][18] organic polymer grafting, [19][20][21] liquid additives 22,23 and electrode/electrolyte interface design. [24][25][26] For instance, our group prepared latticematched BaTiO 3 -Li 0.33 La 0.56 TiO 3Àx (BTO-LLTO) nanowires with a side-by-side heterojunction structure as a filler for PVDF-based electrolytes.…”

“…9,10 In comparison with other SPEs, polyvinylidene fluoride (PVDF) solid polymer electrolytes have excellent flexibility and mechanical properties, along with high electrochemical and thermal stability, giving them great application potential in SSLMBs. 11 It is generally recognized that the [Li(DMF) x ] + solution structure is formed by complexing trace amounts of residual N , N -dimethylformamide (DMF) molecules in the PVDF electrolyte with lithium ions (Li + ), and the Li + is transported through the interaction between [Li(DMF) x ] + and PVDF chains. 12,13…”

“…After years of effort, the ionic conductivity, mechanical strength and electrochemical stability window of PVDF-based electrolytes have been improved to a considerable level 11 through inorganic filler modification, 14–18 organic polymer grafting, 19–21 liquid additives 22,23 and electrode/electrolyte interface design. 24–26 For instance, our group prepared lattice-matched BaTiO 3 –Li 0.33 La 0.56 TiO 3− x (BTO–LLTO) nanowires with a side-by-side heterojunction structure as a filler for PVDF-based electrolytes.…”