Solid-state polymer electrolytes with in-built fast interfacial transport for secondary lithium batteries

Zhao, Qing; Liu, Xiaotun; Stalin, Sanjuna; Khan, Kasim; Archer, Lynden A.

doi:10.1038/s41560-019-0349-7

Cited by 855 publications

(651 citation statements)

References 49 publications

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“…This increase is generally associated with the formation and growth of a SEI layer on the Li metal electrode and accumulation of dead Li at the interface. [ 46 ] After 750 h a sudden drop of the voltage indicates an internal short circuit as a result of the penetration of dendrites, caused by local Li plating at defects, through the solid electrolyte. [ 47 ] The symmetric cell without interlayer or LE wetting shows even poorer cyclic stability, as seen in Figure S17 (Supporting Information).…”

Section: Resultsmentioning

confidence: 99%

Design of a Multifunctional Interlayer for NASCION‐Based Solid‐State Li Metal Batteries

Xiong

Liu

Jankowski

et al. 2020

Adv Funct Materials

129

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NASCION-type Li conductors have great potential to bring high capacity solid-state batteries to realization, related to its properties such as high ionic conductivity, stability under ambient conditions, wide electrochemical stability window, and inexpensive production. However, their chemical and thermal instability toward metallic lithium (Li) has severely hindered attempts to utilize Li as anode material in NASCION-based battery systems. In this work, it is shown how a tailored multifunctional interlayer between the solid electrolyte and Li anode can successfully address the interfacial issues. This interlayer is designed by creating a quasi-solid-state paste in which the functionalities of LAGP (Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 ) nanoparticles and an ionic liquid (IL) electrolyte are combined. In a solid-sate cell, the LAGP-IL interlayer separates the Li metal from bulk LAGP and creates a chemically stable interface with low resistance (≈5 Ω cm 2 ) and efficiently prevents thermal runaway at elevated temperatures (300 °C). Solid-state cells designed with the interlayer can be operated at high current densities, 1 mA cm −2 , and enable high rate capability with high safety. Here developed strategy provides a generic path to design interlayers for solid-state Li metal batteries.

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Section: Resultsmentioning

confidence: 99%

Design of a Multifunctional Interlayer for NASCION‐Based Solid‐State Li Metal Batteries

Xiong

Liu

Jankowski

et al. 2020

Adv Funct Materials

129

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“…By taking advantage of the low viscosity and interfacial interactions of the liquid precursors,35–37 such electrolytes are reported to overcome conventional problems with poor interfacial charge transport. SSEs based on polymerized 1,3‐dioxolane (Poly‐DOL) are of particular interest because this polymer forms chemically stable interphases on Li metal and thereby enables highly reversible cycling of Li metal anodes 38. Ring‐opening polymerization of DOL in the presence of a mixture of Lewis acids, AlF 3 , and aluminum triflate (Al(OTf) 3 ) is shown herein, further, to provide a general approach for creating poly‐DOL SSEs with in‐built functionality to stabilizing the electrolyte at the reducing potentials of a Li metal anode and the oxidizing potentials of a LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) cathode.…”

Section: Figurementioning

confidence: 99%

“…Ionic transport properties of the in situ polymerized AlF 3 ‐Poly‐DOL electrolyte are shown in Figure 1c. The poly‐DOL electrolytes exhibit ionic conductivities at mS cm −1 level at both room and elevated temperatures, where the conductivities are enhanced with the addition of AlF 3 additives compared with routine Poly‐DOL electrolyte 38. The enhancement is thought to originate from the decrease in the average poly‐DOL molecular weight, because AlF 3 is itself a strong Lewis acid capable of initiating ring‐opening polymerization of DOL (Figure S2, Supporting Information).…”

Section: Figurementioning

confidence: 99%

Rechargeable Lithium Metal Batteries with an In‐Built Solid‐State Polymer Electrolyte and a High Voltage/Loading Ni‐Rich Layered Cathode

et al. 2020

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Solid‐state batteries enabled by solid‐state polymer electrolytes (SPEs) are under active consideration for their promise as cost‐effective platforms that simultaneously support high‐energy and safe electrochemical energy storage. The limited oxidative stability and poor interfacial charge transport in conventional polymer electrolytes are well known, but difficult challenges must be addressed if high‐voltage intercalating cathodes are to be used in such batteries. Here, ether‐based electrolytes are in situ polymerized by a ring‐opening reaction in the presence of aluminum fluoride (AlF3) to create SPEs inside LiNi0.6Co0.2 Mn0.2O2 (NCM) || Li batteries that are able to overcome both challenges. AlF3 plays a dual role as a Lewis acid catalyst and for the building of fluoridized cathode–electrolyte interphases, protecting both the electrolyte and aluminum current collector from degradation reactions. The solid‐state NCM || Li metal batteries exhibit enhanced specific capacity of 153 mAh g−1 under high areal capacity of 3.0 mAh cm−2. This work offers an important pathway toward solid‐state polymer electrolytes for high‐voltage solid‐state batteries.

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“…With the rapid increases of energy demand and serious environmental issues caused by conventional fossil fuel, the renewable sustainable clean energy, such as wind, water, geothermal energy, has been widely regarded as most promising candidates . Meanwhile, the advanced electrochemical energy storage and conversion systems have showed a great significance in the high‐efficiency utilization of these sustainable energy . Owing to the low cost and rich abundance of sodium resource, the rechargeable Na‐ion batteries have attracted more and more attention for large‐scale stationary energy storage .…”

mentioning

confidence: 99%

A Flexible Solid Electrolyte with Multilayer Structure for Sodium Metal Batteries

Ling

Yue

et al. 2020

Advanced Energy Materials

115

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Solid electrolytes (SEs) can potentially address the inherent safety problems of conventional organic liquid electrolytes. However, their low ionic conductivity and large interfacial resistance limit the practical applications of SEs. Here, a flexible solid electrolyte with a multilayer structure is fabricated by the UV curing of an interpenetrating network of poly(ether‐acrylate) (ipn‐PEA) in the Na3Zr2Si2PO12/poly(vinylidene fluoride‐hexafluoropropylene) porous skeleton (NZSP/PVDF‐HFP), exhibiting a high Na+ transference number of 0.63 and a suitable ionic conductivity of above 10−4 S cm−1 at 60 °C. In addition, due to the unique structure of the internal rigidity and external flexibility, the composite solid electrolyte can effectively mitigate interfacial ion transfer issues while guaranteeing a certain mechanical strength, and largely inhibiting the formation of dendrite and dead sodium. The solid sodium metal batteries using Na3V2(PO4)3 (NVP) as a cathode possess a discharge capacity of 85 mA h g−1 after 100 cycles at 0.5 C, and achieve above 90% of capacity retention rate during 100 cycles at 0.1 C for Na2/3Ni1/3Mn1/3Ti1/3O2 (NTMO) at 60 °C. The flexible solid electrolyte with multilayer structure shows a great advantage for managing the ionic conductivity and interface resistance problem, suggesting a promise as a practical sodium metal battery.

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Solid-state polymer electrolytes with in-built fast interfacial transport for secondary lithium batteries

Cited by 855 publications

References 49 publications

Design of a Multifunctional Interlayer for NASCION‐Based Solid‐State Li Metal Batteries

Design of a Multifunctional Interlayer for NASCION‐Based Solid‐State Li Metal Batteries

Rechargeable Lithium Metal Batteries with an In‐Built Solid‐State Polymer Electrolyte and a High Voltage/Loading Ni‐Rich Layered Cathode

A Flexible Solid Electrolyte with Multilayer Structure for Sodium Metal Batteries

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