Investigation of cyano resin-based gel polymer electrolyte: in situ gelation mechanism and electrode–electrolyte interfacial fabrication in lithium-ion battery

Zhou, Dong; He, Yan‐Bing; Cai, Qiang; Qin, Xianying; Li, Baohua; Du, Hongda; Yang, Quan‐Hong; Kang, Feiyu

doi:10.1039/c4ta04504a

Cited by 102 publications

(57 citation statements)

References 44 publications

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“…After that, the molten precursor was injected into a PAN-based electrospun fi ber membrane (17 µm) and fi lled into the cells, and then the assembled cells were heated at 70 °C for 6 h. During this process, a cationic polymerization of cyano groups on the PVA-CN was initiated by PF 5 , which was derived from the thermodecomposition of LiPF 6 under heating conditions. [ 17 ] Finally, a crosslinked 3D framework structure fi lled by SN-based solid electrolyte was formed in the pores of electrospun fi ber membrane, meanwhile the preparation of all-solid-state electrolytes and the formation of all-solid-state LIBs was completed in one step. Compared with traditional method, this in situ synthesis method greatly simplifi ed the assembly process of the all-solidstate LIBs.…”

Section: In Situ Synthesis Of Sensmentioning

confidence: 99%

“…A crosslinkable PVA-CN-based organogel is formed in the LiPF 6 organic solution via in situ cationic polymerization of the cyano resin initiated by PF 5 produced by the thermo-decomposition of LiPF 6 . [ 17 ] Based on this mechanism, in the present study, a hierarchical all-solid-state electrolyte based on nitrile materials (SEN) is designed to overcome the aforementioned limitation of SNbased electrolyte. This special all-solid-state electrolyte is fabricated by polymerizing the PVA-CN in the SN-based solid electrolyte that is fi lled in network of polyacrylonitrile (PAN)-based electrospun fi ber membrane.…”

Section: Introductionmentioning

confidence: 99%

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In Situ Synthesis of a Hierarchical All‐Solid‐State Electrolyte Based on Nitrile Materials for High‐Performance Lithium‐Ion Batteries

Zhou

Liu

et al. 2015

Advanced Energy Materials

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347

207

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A hierarchical all‐solid‐state electrolyte based on nitrile materials (SEN) is prepared via in situ synthesis method. This hierarchical structure is fabricated by in situ polymerizing the cyanoethyl polyvinyl alcohol (PVA‐CN) in succinonitrile (SN)‐based solid electrolyte that is filled in the network of polyacrylonitrile (PAN)‐based electrospun fiber membrane. The crosslinked PVA‐CN polymer framework is uniformly dispersed in the SN‐based solid electrolyte, which can strongly enhance its mechanical strength and keeps it in a quasi‐solid state even over the melting point. The electrospun fiber membrane efficiently reduces the thickness of SEN film besides a further improvement in strength. Because of the unique hierarchical structure and structure similarity among the raw materials, the prepared SEN film exhibits high room‐temperature ionic conductance (0.30 S), high lithium ion transference number (0.57), favorable mechanical strength (15.31 MPa), excellent safety, and good flexibility. Furthermore, the in situ synthesis ensures an excellent adhesion between SEN and electrodes, which leads to an outstanding electrochemical performance for the assembled LiFePO4/SEN/Li cells. Both the superior performance of SEN and the simple fabricating process of SEN‐based all‐solid‐state cells make it potentially as one of the most promising electrolyte materials for next generation lithium‐ion batteries.

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Section: In Situ Synthesis Of Sensmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

In Situ Synthesis of a Hierarchical All‐Solid‐State Electrolyte Based on Nitrile Materials for High‐Performance Lithium‐Ion Batteries

Zhou

Liu

et al. 2015

Advanced Energy Materials

Self Cite

347

207

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“…Qi et al presented tris(trimethylsilyl) phosphite (TMSPi) can bond with the hydrolysis product of LiPF , thus change the component of the CEI film and enhance the cycle performance of NCM523/graphite cells. [81] Inspired by successful application of the -NCO functional group and its derivatives for participating in the formation of protective CEI layer [82,83] , Wang et. al presented a novel electrolyte additive containing both -NCO and SiÀ O groups for Li/ LiNi 0.6 Co 0.2 Mn 0.2 O 2 (NCM622) half cells, 3-Isocyanatopropyltriethoxysilane (IPTS).…”

Section: Ncm Familymentioning

confidence: 99%

Regulation of Cathode‐Electrolyte Interphase via Electrolyte Additives in Lithium Ion Batteries

Wang

et al. 2020

Chemistry An Asian Journal

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As the power supply of the prosperous new energy products, advanced lithium ion batteries (LIBs) are widely applied to portable energy equipment and large‐scale energy storage systems. To broaden the applicable range, considerable endeavours have been devoted towards improving the energy and power density of LIBs. However, the side reaction caused by the close contact between the electrode (particularly the cathode) and the electrolyte leads to capacity decay and structural degradation, which is a tricky problem to be solved. In order to overcome this obstacle, the researchers focused their attention on electrolyte additives. By adding additives to the electrolyte, the construction of a stable cathode‐electrolyte interphase (CEI) between the cathode and the electrolyte has been proven to competently elevate the overall electrochemical performance of LIBs. However, how to choose electrolyte additives that match different cathode systems ideally to achieve stable CEI layer construction and high‐performance LIBs is still in the stage of repeated experiments and exploration. This article specifically introduces the working mechanism of diverse electrolyte additives for forming a stable CEI layer and summarizes the latest research progress in the application of electrolyte additives for LIBs with diverse cathode materials. Finally, we tentatively set forth recommendations on the screening and customization of ideal additives required for the construction of robust CEI layer in LIBs. We believe this minireview will have a certain reference value for the design and construction of stable CEI layer to realize desirable performance of LIBs.

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“…However, the ionic conductivities of all polymer electrolytes could only reach 1 × 10 −4 S cm −1 at higher than 60 °C. Recently, polymer electrolytes based on other polymers with high ion conductivity, such as cyanoethyl polyvinyl alcohol, Poly(propylene carbonate), etc., which are supported by electrospinning or nonwoven fabrics, are proved to be an effective way to prepare polymer electrolytes with good mechanical and electrochemical properties for lithium ion batteries . Although these studies have provided useful methods to obtain polymer electrolytes with both good mechanical and electrochemical properties, the cost of increasingly sophisticated synthetic schemes or specific additives may not be feasible for mass production .…”

Section: Introductionmentioning

confidence: 99%

Facile One Pot Polycondensation Method to Synthesize the Crosslinked Polyethylene glycol‐Based Copolymer Electrolytes

Gong

Shi

Zeng

et al. 2016

Macro Chemistry & Physics

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Comb‐like polyethylene glycol (PEG)‐based copolymer electrolytes with given crosslinking density are synthesized using PEG as the main chain segments (denoted as MC‐PEG), methoxy polyethylene glycol (MPEG) as side chain segments (denoted as SC‐PEG), and hexamethylene‐1,6‐diisocyanate homopolymer (HDI trimer) as bridging and/or crosslinking agent. In this study, the effects of molecular weight of MC‐PEG and SC‐PEG on Li ion conductivities of the copolymer have been examined. If MC‐PEG and/or SC‐PEG do not crystallize, the ion conductivities of graft copolymer electrolyte increase with either decreasing MC‐PEG or increasing SC‐PEG segment length. The highest ion conductivity of the copolymer electrolyte at room temperature reaches up to 7.7 × 10−4 S cm−1 when the molecular weight of MC‐PEG is 400 g mol−1 and SC‐PEG is 1000 g mol−1 (denoted as GC400‐1000). However, when the MC‐PEG and/or SC‐PEG segments begin to crystallize (i.e., GC400‐2000), where the flexibility of the related PEG molecular chains is largely reduced, the ion conductivity drops by almost two orders comparing to that of GC400‐1000 copolymer electrolyte. Meanwhile, crosslinked GC400‐1000 electrolyte has good thermal and electrochemical stability as well as high mechanical properties, making it suitable for commercial applications in Li ion secondary batteries.

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Investigation of cyano resin-based gel polymer electrolyte: in situ gelation mechanism and electrode–electrolyte interfacial fabrication in lithium-ion battery

Abstract: This paper reports the gelation mechanism of PVA-CN-based GPE and fabrication of an electrode–GPE interface with less resistance during formation.

Cited by 102 publications

References 44 publications

In Situ Synthesis of a Hierarchical All‐Solid‐State Electrolyte Based on Nitrile Materials for High‐Performance Lithium‐Ion Batteries

In Situ Synthesis of a Hierarchical All‐Solid‐State Electrolyte Based on Nitrile Materials for High‐Performance Lithium‐Ion Batteries

Regulation of Cathode‐Electrolyte Interphase via Electrolyte Additives in Lithium Ion Batteries

Facile One Pot Polycondensation Method to Synthesize the Crosslinked Polyethylene glycol‐Based Copolymer Electrolytes

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