Dendrite-free lithium–metal batteries at high rate realized using a composite solid electrolyte with an ester–PO₄ complex and stable interphase

Abstract

PO43−–ester interactions realize dendrite-free Li deposition in PCL–LAGP, evidenced by galvanostatic cycling and in situ TEM observations. The corresponding battery achieves high coulombic efficiency ∼100% and a rate capability ≥10C.

Solvent-Free Method Prepared a Sandwich-like Nanofibrous Membrane-Reinforced Polymer Electrolyte for High-Performance All-Solid-State Lithium Batteries

“…It is obviously seen that our designed Li/PPT− CPE/LiFePO 4 cell delivers a distinguished battery performance, which is competitive with other solid cells with similar polymer electrolytes. 36,45,53,57 Furthermore, the cycling performance of the Li/PPT−CPE/LiFePO 4 cell at different temperatures was also carried out to evaluate the thermal stability. As shown in Figure S8 (Supporting Information), it can work at least up to 70 °C.…”

“…Benefiting from the reinforcement of the nanofibrous membrane, this CPE membrane displays excellent flexibility. For SPEs, although the tensile strength of the polymer electrolyte plays an important role in inhibiting the growth of lithium dendrites, other properties such as good interfacial contact and chemical interactions can also suppress Li dendrites. − Although the tensile strength is not evaluated, the composite electrolyte film is quite strong-stretched manually by hand, which is strong enough to separate the cathode and anode. Apart from the general opinion on enhancing the mechanical strength, the PPT–CSE electrolyte exhibits additional distinct features for suppressing the formation of lithium dendrites.…”

Confronting the Challenges in Lithium Anodes for Lithium Metal Batteries

“…Hence, the inorganic/polymer hybrid solid electrolyte has been at focus. Numerous polymer matrixes (like PEO, [ 20 , 112 ] polyethylene glycol (PEG), [ 113 ] polycaprolactone, [ 114 ] etc.) and inorganic fillers (Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP), [ 114 ] Li 10 GeP 2 S 12 (LGPS), [ 113 , 115 ] BN, [ 116 ] LLZO, [ 102 ] Ta‐doped Li 7 La 3 Zr 2 O 12 , [ 100 ] MnO 2 , [ 112 ] etc.)…”

“…The battery with P(V‐B) exhibited good stability even at 4C after 600 cycles. Some ceramics, such as, Li 3 x La 2/3− x TiO 3 [ 107 ] and LAGP, [ 114 ] also have anchoring effect on anions and display single‐ion conductivity, which are also demonstrated effective in promoting uniform distribution of Li + in the electrolyte. The physical properties of ferroelectric materials are also used to regulate the transport of lithium ions.…”

“…Hence, the inorganic/polymer hybrid solid electrolyte has been at focus. Numerous polymer matrixes (like PEO, [20,112] polyethylene glycol (PEG), [113] polycaprolactone, [114] etc.) and inorganic fillers (Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP), [114] Li 10 GeP 2 S 12 (LGPS), [113,115] BN, [116] LLZO, [102] Ta-doped Li 7 La 3 Zr 2 O 12 , [100] MnO 2 , [112] etc.)…”