Cross-linked polymer electrolyte and its application to lithium polymer battery

Sakakibara, Toshihiko; Kitamura, Mitsuru; Honma, Takumi; Kohno, Hiromi; Uno, Takahiro; Kubo, Masataka; Imanishi, Nobuyuki; Takeda, Yasuo; Itoh, Takahito

doi:10.1016/j.electacta.2018.11.155

Cited by 36 publications

(22 citation statements)

References 43 publications

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“…However, ionic conductivities of typical linear PEO-based SPEs at room temperature are normally low (≤10 −6 S cm −1 ) owing to the high crystallinity of the EO (Wang et al, 2018 ). To enhance ionic conductivities, strategies including the use of block copolymer electrolytes (Pelz et al, 2018 ), cross-linked polymer electrolytes (Sakakibara et al, 2019 ), interpenetrating network polymer electrolytes (Tong et al, 2018 ), and composite polymer electrolytes (Liu et al, 2017 ; Yao et al, 2019 ) have been proposed. Furthermore, SPEs are typically operated at a high temperature (usually at 60°C) to achieve good battery performance; however, under this condition, ionic conductivities can be low, and electrode/electrolyte interfacial resistances may increase.…”

Section: Introductionmentioning

confidence: 99%

Li7La3Zr2O12 Garnet Solid Polymer Electrolyte for Highly Stable All-Solid-State Batteries

et al. 2021

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All-solid-state batteries have gained significant attention as promising candidates to replace liquid electrolytes in lithium-ion batteries for high safety, energy storage performance, and stability under elevated temperature conditions. However, the low ionic conductivity and unsuitability of lithium metal in solid polymer electrolytes is a critical problem. To resolve this, we used a cubic garnet oxide electrolyte (Li7La3Zr2O12 – LLZO) and ionic liquid in combination with a polymer electrolyte to produce a composite electrolyte membrane. By applying a solid polymer electrolyte on symmetric stainless steel, the composite electrolyte membrane shows high ionic conductivity at elevated temperatures. The effect of LLZO in suppressing lithium dendrite growth within the composite electrolyte was confirmed through symmetric lithium stripping/plating tests under various current densities showing small polarization voltages. The full cell with lithium iron phosphate as the cathode active material achieved a highest specific capacity of 137.4 mAh g−1 and a high capacity retention of 98.47% after 100 cycles at a current density of 50 mA g−1 and a temperature of 60°C. Moreover, the specific discharge capacities were 137 and 100.8 mAh g−1 at current densities of 100 and 200 mA g−1, respectively. This research highlights the capability of solid polymer electrolytes to suppress the evolution of lithium dendrites and enhance the performance of all-solid-state batteries.

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Section: Introductionmentioning

confidence: 99%

Li7La3Zr2O12 Garnet Solid Polymer Electrolyte for Highly Stable All-Solid-State Batteries

et al. 2021

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“…Therefore, promoting segment movement and high ion conductivity by adjusting the crystallinity of PEO at room temperature is very important. 24 In order to improve the ion conductivity of PEO-based SPEs at room temperature, previous research focused on the adjustment of the amorphous form, such as plasticizing, 25 blending, 26 copolymerization, 27 cross-linking, 28 and compounding with fillers to reduce the crystallinity of the system, which can improve electrochemical stability and inhibit the formation of lithium dendrites to a certain extent. Therefore, a composite polymer electrolyte (CPE) is considered to be one of the important technical strategies for the development of PEO-based SPEs in the future because it can combine the merits of both the polymer matrix and fillers.…”

Section: Peo-based Solid-state Polymer Electrolyte (Spe)mentioning

confidence: 99%

Polyethylene Oxide-Based Solid-State Composite Polymer Electrolytes for Rechargeable Lithium Batteries

Ding

et al. 2021

ACS Appl. Energy Mater.

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Solid-state polymer electrolytes are considered to be the most promising electrolytes for next-generation high-energy rechargeable lithium batteries due to the advantages of high safety, good mechanical flexibility, and easy film-formation ability. Among all the polymers, polyethylene oxide (PEO) is demonstrated to be a feasible polymer host, based on its high dielectric constant and strong lithium salt dissolving ability. However, the practical application of PEO in the all-solid-state lithium batteries is limited mainly by its low ionic conductivity at room temperature. For decades, researchers dedicate to increase the ion conductivity at room temperature and mechanical properties according to the technology strategy of composite polymer electrolytes. In particular, the electrode/electrolyte interface structure is designed and optimized according to the requirement of different battery systems. Accordingly, in this review, the basic characteristics, ion transport mechanism, composite mechanism of inert/active fillers with polymers, and electrode/ electrolyte interface structures are evaluated for the PEO-based composite polymer electrolytes. Finally, the outlook is presented for future development of the solid-state polymer electrolytes and high-energy rechargeable lithium batteries.

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“…Most of the commercial LIBs are involved with liquid electrolytes composed of organic solvents and lithium salts, which raises great concerns over safety when occasional combustion and explosion accidents emerged all over the world. [87] The flammable and volatile organic solvents may leak or burn at high temperature. They are apt to decompose under high potential, which means the high potential advantages of the electrode materials cannot be used in full.…”

Section: Electrolytesmentioning

confidence: 99%

Applications of Carbon Dots in Next‐generation Lithium‐Ion Batteries

et al. 2020

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Lithium-ion battery (LIB) is a dominating power source in the market owing to its high energy density, good cycling stability and environmental benignity. However, technical challenges remain after years' optimization and commercialization, which are detrimental to the expected performance and lifespan of LIBs. For instance, many cathode materials of LIBs suffer from rapid capacity fading and poor high-rate performance, which are ascribed to self-aggregation, dissolution and fast increased charge transfer resistances during cycles. In terms of the anode materials, low coulombic efficiency, electrolyte depletion and safety issues are common. In addition, the liquid electrolyte systems trigger safety concerns because flammable and volatile organic solvents are necessary. Recently, carbon dots (CDs) emerge as a sound material to address those challenges of LIBs, and also present promising applications in bioimaging, fluorescence sensing, photo/electro-catalysis, and electroluminescence. This review will overlook the state-of-the-art advances in the employment of CDs based composites to build cathode/anode materials and electrolytes in LIBs, through tailoring the internal structures and the surface states of electrode materials, and being additives in electrolyte, to improve the performances of the next-generation LIBs. The major challenges and opportunities in front of CDs in LIBs will be outlined and discussed in detail.

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Cross-linked polymer electrolyte and its application to lithium polymer battery

Cited by 36 publications

References 43 publications

Li7La3Zr2O12 Garnet Solid Polymer Electrolyte for Highly Stable All-Solid-State Batteries

Li7La3Zr2O12 Garnet Solid Polymer Electrolyte for Highly Stable All-Solid-State Batteries

Polyethylene Oxide-Based Solid-State Composite Polymer Electrolytes for Rechargeable Lithium Batteries

Applications of Carbon Dots in Next‐generation Lithium‐Ion Batteries

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