Li salt initiated in-situ polymerized solid polymer electrolyte: new insights via in-situ electrochemical impedance spectroscopy

Ma, Yue; Sun, Qifang; Wang, Su; Zhou, Ying; Song, Dawei; Zhang, Hongzhou; Shi, Xixi; Zhang, Lianqi

doi:10.1016/j.cej.2021.132483

Cited by 33 publications

(21 citation statements)

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“…With sputtering, peaks at 530.2, 531.8, and 532.7 eV can be assigned to the Zn(OH) 2 , [40] C-OH, [41] and ZnO, [42] respectively. For PSS-modified electrolytes (Figure S30, Supporting Information), before sputtering, on the top surface of SEI, there are two peaks at 684.1 and 688.7 eV, corresponding to C-F [43] (21%) and -CF 3 [44] (79%). After 10 s sputtering, the signal of the weak bond between F and C atoms disappeared.…”

Section: Resultsmentioning

confidence: 99%

Polymer Chain‐Guided Ion Transport in Aqueous Electrolytes of Zn‐Ion Batteries

Wu,

Zhang,

Chen

et al. 2023

Advanced Energy Materials

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As a promising candidate for next‐generation energy storage devices, Zn metal battery excels with their good safety, high specific capacity, and economic attractiveness. However, it still suffers from a narrow electrochemical window, notorious dendrite formation, and sluggish Zn ion transfer. Aqueous electrolyte engineering has been regarded as an effective way to improve these. It is shown that by adding sodium polystyrene sulfonate (PSS) polymers into a dilute 1 m Zn(OTf)2 aqueous electrolyte, compact water shells with stronger hydrogen bonding and more ordered structures are formed around the polymer chains. As a result, a fast transport channel to the zinc ions is provided. The PSS chains also protect the zinc electrode from directly contacting the water molecules and thus suppress water decomposition. With these merits, a Zn//Cu cell demonstrates a high coulombic efficiency of ≈99% after 1500 h cycling. Meanwhile, a record‐high cumulative Zn plating capacity of 10 000 mA h cm−2 is obtained using a Zn||Zn cell. In addition, the Zn//C@V2O5 full cell achieves almost 100% capacity retention after 1000 cycles. This work provides a new strategy for designing advanced electrolyte systems excelling in ion transport kinetics.

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Section: Resultsmentioning

confidence: 99%

Polymer Chain‐Guided Ion Transport in Aqueous Electrolytes of Zn‐Ion Batteries

Wu,

Zhang,

Chen

et al. 2023

Advanced Energy Materials

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“…[114] While BF 3 , the product of further decomposition of LiBF 4 , can also initiate polymerization reactions by cationic polymerization mechanisms, and its initiation effect is greater than that of LiPF 6 . [115] During the polymerization reaction, the BF 3 generated by the decomposition of LiDFOB combines with water molecules to form H + (BF 3 OH) − and the subsequent reaction mechanism is similar to that of H + (PF 5 OH) − (Figure 7a).…”

Section: Boratementioning

confidence: 99%

“…In addition to DOL, TTE, which has three ternary heterocyclic termini, is also capable of being induced by LiDFOB to polymerize and produce a cross-linked structure (Figure 7c), forming an all-solid polymer electrolyte. [115] Besides, LiDFOB can also initiate the polymerization of 1,3,5-trioxane (TXE). Cui et al [119] constructed SPE from LiDFOB, TXE, and SN, all solids at room temperature, where LiDFOB can form a deep eutectic solvent with SN, and the melting point of TXE is ≈60 °C.…”

Section: Boratementioning

confidence: 99%

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Contributing to the Revolution of Electrolyte Systems via In Situ Polymerization at Different Scales: A Review

Zhang,

Wu,

Hou

et al. 2023

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Solid‐state batteries have become the most anticipated option for compatibility with high‐energy density and safety. In situ polymerization, a novel strategy for the construction of solid‐state systems, has extended its application from solid polymer electrolyte systems to other solid‐state systems. This review summarizes the application of in situ polymerization strategies in solid‐state batteries, which covers the construction of polymer, the formation of the electrolyte system, and the design of the full cell. For the polymer skeleton, multiple components and structures are being chosen. In the construction of solid polymer electrolyte systems, the choice of initiator for in situ polymerization is the focus of this review. New initiators, represented by lithium salts and additives, are the preferred choice because of their ability to play more diverse roles, while the coordination with other components can also improve the electrical properties of the system and introduce functionalities. In the construction of entire solid‐state battery systems, the application of in situ polymerization to structure construction, interface construction, and the use of separators with multiplex functions has brought more possibilities for the development of various solid‐state systems and even the perpetuation of liquid electrolytes.

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“…BF 3 is one of the widely employed Lewis acids for CROP [ 2 , 3 ], as is its precursor boron trifluoride diethyl ether complex (BF 3 OEt 2 ) [ 9 ]. Moreover, common lithium salts such as lithium tetrafluoroborate (LiBF 4 ) [ 10 ], lithium perchlorate (LiClO 4 ) [ 2 , 9 ], lithium hexafluorophosphate (LiPF 6 ) [ 10 ], lithium difluoro(oxalato)borate (LiDFOB) [ 11 ], and lithium bis(trifluoromethane)sulfonimide (LiTFSI) [ 12 ] have been introduced into ring-opening polymerization because of their superacid anions. Lithium salts can also act as Lewis acids to activate the ring-opening polymerization reaction owing to their lower melting point and better solubility in low dielectric media [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Lithium Salt Catalyzed Ring-Opening Polymerized Solid-State Electrolyte with Comparable Ionic Conductivity and Better Interface Compatibility for Li-Ion Batteries

et al. 2022

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Rechargeable lithium-ion batteries have drawn extensive attention owing to increasing demands in applications from portable electronic devices to energy storage systems. In situ polymerization is considered one of the most promising approaches for enabling interfacial issues and improving compatibility between electrolytes and electrodes in batteries. Herein, we observed in situ thermally induced electrolytes based on an oxetane group with LiFSI as an initiator, and investigated structural characteristics, physicochemical properties, contacting interface, and electrochemical performances of as-prepared SPEs with a variety of technologies, such as FTIR, 1H-NMR, FE-SEM, EIS, LSV, and chronoamperometry. The as-prepared SPEs exhibited good thermal stability (stable up to 210 °C), lower activation energy, and high ionic conductivity (>0.1 mS/cm) at 30 °C. Specifically, SPE-2.5 displayed a comparable ionic conductivity (1.3 mS/cm at 80 °C), better interfacial compatibility, and a high Li-ion transference number. The SPE-2.5 electrolyte had comparable coulombic efficiency with a half-cell configuration at 0.1 C for 50 cycles. Obtained results could provide the possibility of high ionic conductivity and good compatibility through in situ polymerization for the development of Li-ion batteries.

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Li salt initiated in-situ polymerized solid polymer electrolyte: new insights via in-situ electrochemical impedance spectroscopy

Cited by 33 publications

References 50 publications

Polymer Chain‐Guided Ion Transport in Aqueous Electrolytes of Zn‐Ion Batteries

Polymer Chain‐Guided Ion Transport in Aqueous Electrolytes of Zn‐Ion Batteries

Contributing to the Revolution of Electrolyte Systems via In Situ Polymerization at Different Scales: A Review

Lithium Salt Catalyzed Ring-Opening Polymerized Solid-State Electrolyte with Comparable Ionic Conductivity and Better Interface Compatibility for Li-Ion Batteries

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