Single Lithium‐Ion Conducting Polymer Electrolytes Based on a Super‐Delocalized Polyanion

Ma, Qiang; Zhang, Heng; Zhou, Chongwang; Zheng, Liping; Cheng, Pengfei; Nie, Jun; Feng, Wenfang; Hu, Yong‐Sheng; Li, Hong; Huang, Xuejie; Chen, Liquan; Armand, Michel; Zhou, Zhibin

doi:10.1002/ange.201509299

Cited by 49 publications

(57 citation statements)

References 30 publications

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“…[8][9][10][11][12] Thus, there has been plenty of revealing research into LIBs. [13][14][15] Compared with LIBs, research of SPEs in SIBs is at av ery early stage, even though they startedi nt he same period, [16][17][18][19][20] and experimental SPE/SIB batteriesu sually consisto fN as alts and ap olymer matrix [mostly poly(ethylene oxide), PEO]. [21,22] The ionicc onductivities of the chosen Na salt and PEO-based SPEs are comparablew ith the analogous Li salts in LIBs, which are usually around 10 À7 -10 À8 Scm À1 at room temperature and reach approximately 10 À3 Scm À1 above 60 8C( meltingp oint of PEO).…”

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confidence: 99%

“…DH m = 60.5 Jg À1 ), whichm ay be ascribed to the slow kinetic rate of the recrystallization of PEO, as described in the literature. [13,14] One important characteristic of polymer-based SIBs is safety, as the liquid electrolyte will catch fire when the temperature of the battery is high. ATGA test for the NaFSI/PEO (EO/Na + = 20) electrolyte was carried out, and the result( in Figure 2b)i ndicatest hat it is quite acceptable, with as table temperature range up to about 263 8C.…”

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confidence: 99%

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Sodium Bis(fluorosulfonyl)imide/Poly(ethylene oxide) Polymer Electrolytes for Sodium‐Ion Batteries

Liu

et al. 2016

ChemElectroChem

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Sodium‐ion batteries (SIBs), a promising substitute for lithium‐ion batteries (LIBs), are considered to have the potential to be employed in large‐scale energy storage systems with lower cost and enhanced safety as primary concerns. Solid polymer electrolyte (SPE)‐based SIBs will more likely meet these demands, because of their good flame resistance and excellent flexibility compared with conventional organic liquid‐electrolyte‐based SIBs. Here, we describe an SPE composed of sodium bis(fluorosulfonyl)imide (NaFSI) and poly(ethylene oxide) (PEO). The NaFSI/PEO (molar ratio of EO/Na+=20) blended polymer electrolyte exhibits a low glass transition temperature (i.e. −37.9 °C), relatively high ionic conductivity (i.e. ≈4.1×10−4 S cm−1 at 80 °C), and enough electrochemical and thermal stability for application in SIBs. Most importantly, the NaFSI/PEO blended polymer electrolyte displays excellent interfacial stability with Na metal in Na/Na cells and good cycling performance in prototype cells with Na0.67Ni0.33Mn0.67O2 as the cathode material. All of these properties make NaFSI‐based SPEs promising candidates for use in SIBs.

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Sodium Bis(fluorosulfonyl)imide/Poly(ethylene oxide) Polymer Electrolytes for Sodium‐Ion Batteries

Liu

et al. 2016

ChemElectroChem

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“…Additionally, the degree of free Li + within the solid electrolyte directly influences the lithium transference number (t Li+ ). High t Li+ is favorable to facilitate the stabilization of solid electrolytes during cycling, which prevents the formation of the large electric field by immobilizing anions [52,53]. The t Li+ values of solid electrolytes were measured and calculated by the Bruce's equation.…”

Section: Resultsmentioning

confidence: 99%

High-Performance 3-D Fiber Network Composite Electrolyte Enabled with Li-Ion Conducting Nanofibers and Amorphous PEO-Based Cross-Linked Polymer for Ambient All-Solid-State Lithium-Metal Batteries

et al. 2019

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Solid electrolytes have gained attention recently for the development of next-generation Li-ion batteries since they can fundamentally improve the battery stability and safety. Among various types of solid electrolytes, composite solid electrolytes (CSEs) exhibit both high ionic conductivity and excellent interfacial contact with the electrodes. Incorporating active nanofibers into the polymer matrix demonstrates an effective method to fabricate CSEs. However, current CSEs based on traditional poly(ethylene oxide) (PEO) polymer suffer from the poor ionic conductivity of PEO and agglomeration effect of inorganic fillers at high concentrations, which limit further improvements in Li + conductivity and electrochemical stability. Herein, we synthesize a novel PEO based cross-linked polymer (CLP) as the polymer matrix with naturally amorphous structure and high room-temperature ionic conductivity of 2.40 × 10 −4 S cm −1. Li 0.3 La 0.557 TiO 3 (LLTO) nanofibers are incorporated into the CLP matrix to form composite solid electrolytes, achieving enhanced ionic conductivity without showing filler agglomeration. The high content of Li-conductive nanofibers improves the mechanical strength, ensures the conductive network, and increases the total Li + conductivity to 3.31 × 10 −4 S cm −1. The all-solid-state Li|LiFePO4 batteries with LLTO nanofiber-incorporated CSEs are able to deliver attractive specific capacity of 147 mAh g −1 at room temperature, and no evident dendrite is found at the anode/electrolyte interface after 100 cycles.

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“…88,89 Solid-state electrolytes can be divided into three types: solid polymer electrolytes, composite polymer electrolytes, and inorganic solid electrolytes. 88,89 Solid-state electrolytes can be divided into three types: solid polymer electrolytes, composite polymer electrolytes, and inorganic solid electrolytes.…”

Section: Flexible Electrolytesmentioning

confidence: 99%

Flexible Na batteries

Zhao

Chen

et al. 2019

InfoMat

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Flexible energy storage devices have gained significant attention because of the increasing needs of bendable displays, wearable electronics, and flexible displays. Flexible Na‐based rechargeable batteries are the promising power sources in such products due to their low cost and wide availability. In this review, we firstly introduce the structural superiority of flexible Na‐based batteries and summarize their main components including cathodes, electrolytes, and anodes. Moreover, fabrication of their flexible components is discussed in detail, with specific emphasis on material selection, particularly for solid‐state electrolytes. This is followed by an overview highlighting recent progress in the development of prototypes of flexible Na‐ion batteries and beyond. Finally, perspectives on future challenges for the development of flexible Na batteries are proposed.

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Single Lithium‐Ion Conducting Polymer Electrolytes Based on a Super‐Delocalized Polyanion

Cited by 49 publications

References 30 publications

Sodium Bis(fluorosulfonyl)imide/Poly(ethylene oxide) Polymer Electrolytes for Sodium‐Ion Batteries

Sodium Bis(fluorosulfonyl)imide/Poly(ethylene oxide) Polymer Electrolytes for Sodium‐Ion Batteries

High-Performance 3-D Fiber Network Composite Electrolyte Enabled with Li-Ion Conducting Nanofibers and Amorphous PEO-Based Cross-Linked Polymer for Ambient All-Solid-State Lithium-Metal Batteries

Flexible Na batteries

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