Recent progress in polymer garnet composite electrolytes for solid-state lithium metal batteries

Abstract

Electrolyte plays a prominent role in rechargeable batteries as it decides the safety and performance of the device. The commercialized Li-ion battery consists of liquid electrolyte (lithium salt dissolved organic...

Novel propylene carbonate based localized high concentration electrolyte with high voltage, flame retardant and wide temperature characteristics enables excellent electrochemical performances of lithium metal batteries

“…Currently, they have achieved largescale applications in elds such as power batteries, portable electronic devices, energy storage stations, special power sources, and aerospace exploration. [1][2][3][4][5] However, since their commercialization in 1991, 6,7 the progression of LIBs has reached a point where the battery capacity is nearing the theoretical limit set by the layered graphite anode (372 mA h g −1 ). This constraint makes it challenging to meet the growing demand for high energy density in batteries driven by the advancements of the era.…”

Highly stable all-solid-state batteries with Li–LTO composite anode

“…Among various energy storage devices, rechargeable lithium-ion batteries are one of the favored candidates because of their high energy storage capacity, low self-discharge rate, and high voltage. 1–5 However, the use of flammable organic liquid electrolytes in conventional lithium-ion batteries continues to raise safety concerns. 6–11 As an alternative to organic liquid electrolytes, all-solid-state lithium batteries (ASSLBs) with solid electrolytes, have benefits, such as better electrochemical stability, safety, and long cycle life.…”

3D Flexible Electrospun Nanocomposite Polymer Electrolyte Based on Li1.45Al0.45Ge0.2Ti1.35(PO4)3 for Lithium Metal Batteries

“…Ceramic electrolytes include perovskite structure (Li 0.5 La 0.5 TiO 3 ), sodium superionic conductor structure (NASICON Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 , Li 1.3 Al 0.3 Ti 1.7 (PO 4 ) 3 ), lithium garnet structure (Li 7 La 3 Zr 2 O 12 ), lithium superionic conductor structure (LISICON Li 14 ZnGe 4 O 16 ), lithium phosphorus oxynitride structure (LiPON), and others, each of which possesses several advantages like high ionic conductivity, wide electrochemical potential window, and outstanding thermal stability. − However, ceramic electrolytes are fragile in nature and suffer from high interfacial resistance arising from poor contact with electrodes. , On the other hand, polymer electrolytes like poly­(vinylidene fluoride) (PVDF), poly­(propylene carbonate) (PPC), poly­(vinyl alcohol) (PVA), poly­(ethylene oxide) (PEO), poly­(vinylene carbonate) (PVCA), and polyacrylonitrile (PAN) are lightweight and flexible and exhibit relatively low interfacial resistance. − At the same time, polymer electrolytes have disadvantages like low ionic conductivity, poor thermal stability, and low lithium-ion transference numbers . Among all polymers, PVdF-HFP gets more attention because of its high mechanical strength and excellent electrochemical stability. − …”