Development of the PEO Based Solid Polymer Electrolytes for All-Solid State Lithium Ion Batteries

Jiang, Yu; Yan, Xuemin; Ma, Zhaowu; Mei, Ping; Xiao, Wei; You, Qinliang; Zhang, Yan

doi:10.3390/polym10111237

Cited by 192 publications

(152 citation statements)

References 67 publications

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“…PEO is the most popular and deeply studied polymer matrix, [ 33 ] and the ethylene oxide chain segments in PEO can dissolve Li salts as well as form complexes with Li + and dissociated Li salts. [ 34 ] Li + is conducted by repeatedly carrying out a “decomplexation–recomplexation” process through the movement of chain segments in an amorphous polymer region. [ 35 ]…”

Section: Figurementioning

confidence: 99%

Investigation on the Copolymer Electrolyte of Poly(1,3‐dioxolane‐co‐formaldehyde)

Liu

Yang

et al. 2020

Macromol. Rapid Commun.

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have been found in preventing the pen etration of Li dendrites. [15][16][17] However, the excessive interfacial resistance and the complex processing art of inorganic SSEs limit their practical application. [18][19][20] Solid polymer electrolytes (SPEs), on the other hand, can offer good flexibility and stable contact between the electrodes and electrolytes. [20][21][22][23] Several types of polymer matrices have been developed, such as poly(ethyleneoxide) (PEO), [24][25][26] poly carbonate, [27][28][29] and polysiloxane. [30][31][32] SPEs are prepared by mixing polymer matrices with Li salts. PEO is the most popular and deeply studied polymer matrix, [33] and the ethylene oxide chain segments in PEO can dissolve Li salts as well as form complexes with Li + and dis sociated Li salts. [34] Li + is conducted by repeatedly carrying out a "decomplexa tion-recomplexation" process through the movement of chain segments in an amorphous polymer region. [35] The movement of chain segments in an amorphous polymer region is affected by the glass transition temperature (T g ) and crystallinity. Low T g and crystallinity are beneficial for the move ment of chain segments as well as the ionic conductivity. Due to the high crystallinity of PEO, PEObased SPEs have a low ionic conductivity (10 −8 -10 −7 S cm −1 ) at room temperature, which does not meet the requirement for ionic conductivity (>10 −4 S cm −1 at room temperature) of electrolytes with prom ising applications. [33,36,37] Many strategies, such as adding inorganic nanoparticles, [38][39][40] blending, [41] copolymerization, [42] and crosslinking [43][44][45] have been adopted to effectively sup press the crystallization of PEO and improve the ionic conduc tivity of PEObased SPEs. Coat et al. [46] reported the synthesis of poly(diethylene oxidealtoxymethylene) (P(2EOMO)) as a polymer matrix for SPE, which has higher T g than that of PEO in the electrolyte. They found the P(2EOMO)/LiTFSI electro lyte exhibits a slightly lower ionic conductivity due to higher T g , but much higher Li ion transference number can be obtained in P(2EOMO)/LiTFSI electrolyte (0.36) than that in PEO/ LiTFSI (0.19). So tailoring the main chain structure is the most feasible way to optimize the performance of SPEs.Recently, the strategy of in situ polymerizing SPEs in the batteries has attracted extensive attention due to the ability to construct stable ionic conduction networks inside the electrodes to reduce the interfacial resistance, the biggest challenge faced by most SSEs. Cui et al. [13] in situ prepared A series of copolymers are prepared via cationic ring-opening polymerization with 1,3-dioxolane (DOL) and trioxymethylene (TOM) as monomers. The crystallization behaviors of the copolymers can be suppressed by adjusting the ratio of DOL/TOM. With LiBF 4 as a source for a BF 3 initiator, copolymer electrolytes (CPEs) can be prepared in situ inside cells without needing nonelectrolyte catalysts or initiators. The ionic conductivities and Li + diffusion coefficients (D Li + ) of the CPEs inc...

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Section: Figurementioning

confidence: 99%

Investigation on the Copolymer Electrolyte of Poly(1,3‐dioxolane‐co‐formaldehyde)

Liu

Yang

et al. 2020

Macromol. Rapid Commun.

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“…However, the inherently low ionic conductivities of SPEs limit their practical application. As one of the most extensively investigated SPEs, poly (ethylene oxide) (PEO), when existing in high purity, often are highly crystallized at room temperature, which thus leads to a low ionic conductivity ranging from 10 −7 to 10 −6 S ⋅ cm −1 ; moreover, its narrow electrochemical stability window further restricts its applications in lithium‐ion battery . To enhance the ionic conductivity of SPEs, composite polymers with various formulas have been attempted, including the polymer/liquid hybrid electrolytes, the polymer/polymer coordinating electrolytes and the polymer/inorganic composite electrolytes .…”

Section: Introductionmentioning

confidence: 99%

“…As one of the most extensively investigated SPEs, poly (ethylene oxide) (PEO), when existing in high purity, often are highly crystallized at room temperature, which thus leads to a low ionic conductivity ranging from 10 À 7 to 10 À 6 S · cm À 1 ; moreover, its narrow electrochemical stability window further restricts its applications in lithium-ion battery. [14][15][16] To enhance the ionic conductivity of SPEs, composite polymers with various formulas have been attempted, including the polymer/liquid hybrid electrolytes, the polymer/polymer coordinating electrolytes and the polymer/ inorganic composite electrolytes. [17] Among them, the polymer/ inorganic composite electrolytes are particularly interesting, as the introduction of the inorganic fillers could not only improve the ionic conductivity and the safety, but also it could boost the lithium ion transference number and the mechanical strength of the resulting SPE.…”

Section: Introductionmentioning

confidence: 99%

Metal Organic Framework Nanorod Doped Solid Polymer Electrolyte with Decreased Crystallinity for High‐Performance All‐Solid‐State Lithium Batteries

et al. 2020

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Poly(ethylene oxide) (PEO), an important solid polymer electrolyte (SPE) for solid‐state lithium batteries, suffers from low ionic conductivity and poor electrochemical stability; many inorganic solid compounds have been explored as fillers to address these issues. Herein, we report that Al‐metal organic framework (MOF) nanorods could work as efficient solid fillers to boost the electrochemical performance of PEO‐based SPEs. The addition of MOF nanorods was found to inhibit the crystallization of PEO and effectively weaken the interactions among the PEO chains, resulting in evidently enhanced ionic conductivity and improved electrochemical stability; moreover, when embedded in PEO, such Al‐MOF nanorods are microporous and micrometer long, which are expected to favor the transportation of Li+ over the significantly more bulky anions TFSI−. Compared with pure PEO SPE, our optimal sample PEO‐MOF5% SPE has higher ion conductivity (2.09×10−5 S/cm at 30 °C and 7.11×10−4 S/cm 60 °C), a larger lithium‐ion transference number (0.46) and an enlarged electrochemical window (4.7 V versus Li/Li+). Accordingly, the cell of LiFePO4/PEO‐MOF5%/Li shows excellent cycle performance and rate performance. Our work proved the advantages of MOF particles as solid fillers towards high‐performance PEO‐based SPE, and we also put emphasis on the shape effect of the solid fillers on the lithium‐ion transference number and, thus, the electrochemical performance of the resulting SPE.

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“…The CSE can improve the comprehensive performance of solid electrolyte by the synergistic reaction of each component. The organic/inorganic CSE is becoming a promising trend 11‐14 …”

Section: Introductionmentioning

confidence: 99%

Effects of surface lithiated TiO ₂ nanorods on room‐temperature properties of polymer solid electrolytes

Song

Jing

et al. 2020

Int J Energy Res

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Summary Polymer solid electrolyte with high ionic conductivity at room‐temperature is most likely to be widely used in solid‐state lithium batteries. In this work, the novel surface lithiated TiO2 nanorods were firstly used as ionic conductor in polymer solid electrolyte. The surface lithiated TiO2 nanorods‐filled polypropylene carbonate polymer composite solid electrolyte (CSE) has an uniform composite structure with a thickness of about 60 μm. The ionic conductivity at room‐temperature is 1.21 × 10−4 S cm−1 and the electrochemical stability window is up to 4.6 V (vs Li+/Li). The assembled NCM622/CSE/Li solid‐state battery shows a stable cycle performance with a retention capacity of 120 mAh g−1 after 200 cycles at the current density of 0.3 C and a high coulomb efficiency of 99%. Compared with TiO2 particles, this novel surface lithiated TiO2 nanorods can provide more continuous ion transport channels and more Lewis acid‐base reactive sites, provide a novel way to enhance the lithium ion transport in polymer solid electrolyte.

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Development of the PEO Based Solid Polymer Electrolytes for All-Solid State Lithium Ion Batteries

Cited by 192 publications

References 67 publications

Investigation on the Copolymer Electrolyte of Poly(1,3‐dioxolane‐co‐formaldehyde)

Investigation on the Copolymer Electrolyte of Poly(1,3‐dioxolane‐co‐formaldehyde)

Metal Organic Framework Nanorod Doped Solid Polymer Electrolyte with Decreased Crystallinity for High‐Performance All‐Solid‐State Lithium Batteries

Effects of surface lithiated TiO ₂ nanorods on room‐temperature properties of polymer solid electrolytes

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Development of the PEO Based Solid Polymer Electrolytes for All-Solid State Lithium Ion Batteries

Cited by 192 publications

References 67 publications

Investigation on the Copolymer Electrolyte of Poly(1,3‐dioxolane‐co‐formaldehyde)

Investigation on the Copolymer Electrolyte of Poly(1,3‐dioxolane‐co‐formaldehyde)

Metal Organic Framework Nanorod Doped Solid Polymer Electrolyte with Decreased Crystallinity for High‐Performance All‐Solid‐State Lithium Batteries

Effects of surface lithiated TiO 2 nanorods on room‐temperature properties of polymer solid electrolytes

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Effects of surface lithiated TiO ₂ nanorods on room‐temperature properties of polymer solid electrolytes