“Polymer-in-ceramic” based poly(Ɛ-caprolactone)/ceramic composite electrolyte for all-solid-state batteries

Zhang, Bohao; Liu, Yulong; Liu, Jia; Sun, Liqun; Cong, Lina; Fu, Fang; Mauger, A.; Julien, C.; Xie, Haiming; Pan, Xiumei

doi:10.1016/j.jechem.2020.04.025

Cited by 47 publications

(28 citation statements)

References 53 publications

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“…Figure 3b clearly shows the ionic conductivity trend at different ceramic loadings. A similar trend in ionic conductivity was also observed in a previous work by Zhang et al 39 Having established the maximum ion conductivity at 80 wt % loading of LLZO, this composition was used in all subsequent experiments.…”

Section: Methodsmentioning

confidence: 99%

Garnet-Poly(ε-caprolactone-co-trimethylene carbonate) Polymer-in-Ceramic Composite Electrolyte for All-Solid-State Lithium-Ion Batteries

Nkosi

Valvo

Mindemark

et al. 2021

ACS Appl. Energy Mater.

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A composite electrolyte based on a garnet electrolyte (LLZO) and polyester-based co-polymer (80:20 ε-caprolactone (CL)-trimethylene carbonate, PCL-PTMC with LiTFSI salt) is prepared. Integrating the merits of both ceramic and co-polymer electrolytes is expected to address the poor ionic conductivity and high interfacial resistance in solid-state lithium-ion batteries. The composite electrolyte with 80 wt % LLZO and 20 wt % polymer (PCL-PTMC and lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) at 72:28 wt %) exhibited a Li-ion conductivity of 1.31 × 10–4 S/cm and a transference number (t Li+ ) of 0.84 at 60 °C, notably higher than those of the pristine PCL-PTMC electrolyte. The prepared composite electrolyte also exhibited an electrochemical stability of up to 5.4 V vs Li+/Li. The interface between the composite electrolyte and a LiFePO4 (LFP) cathode was also improved by direct incorporation of the polymer electrolyte as a binder in the cathode coating. A Li/composite electrolyte/LFP solid-state cell provided a discharge capacity of ca. 140 mAh/g and suitable cycling stability at 55 °C after 40 cycles. This study clearly suggests that this type of amorphous polyester-based polymers can be applied in polymer-in-ceramic composite electrolytes for the realization of advanced all-solid-state lithium-ion batteries.

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Section: Methodsmentioning

confidence: 99%

Garnet-Poly(ε-caprolactone-co-trimethylene carbonate) Polymer-in-Ceramic Composite Electrolyte for All-Solid-State Lithium-Ion Batteries

Nkosi

Valvo

Mindemark

et al. 2021

ACS Appl. Energy Mater.

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“…In solid-state lithium batteries, ceramic electrolytes have received widespread attention, such as garnet-type Li7La3Zr2O12(LLZO) [14] and NASICON-type Li1+xAlxTi2-x(PO4)3(LATP) [15] or Li1.5Al0.5Ge1.5(PO4)3(LAGP) [16]. Due to its excellent ion conductivity, chemical stability and wide electrochemical window relative to lithium metal, some of them have become a new class of solid-state electrolyte system(SSEs) [17]. However, when the ceramic solid electrolyte is in contact with the metal lithium negative electrode, electrochemical reactions are prone to occur, which reduces the battery performance.…”

Section: Introductionmentioning

confidence: 99%

Structural evolution of plasma sprayed amorphous Li4Ti5O12 electrode and ceramic/polymer composite electrolyte during electrochemical cycle of quasi-solid-state lithium battery

Liang

Zhang

et al. 2020

Preprint

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Solid-state batteries are one of the effective way to solve the safety of traditional power and energy storage batteries with flammable liquid electrolyte. This time, a quasi-solid-state lithium battery is assembled by plasma sprayed amorphous Li 4 Ti 5 O 12 (LTO) electrode and ceramic/polymer composite electrolyte with a little liquid electrolyte (10 μl/cm 2 ) to provide the outstanding electrochemical stability and better than normal interface contact. SEM, STEM, TEM and EDS were used to analyze the structure evolution and performance of plasma sprayed amorphous LTO electrode and ceramic/polymer composite electrolyte before and after electrochemical experiments. By comparing the electrochemical performance of the amorphous LTO electrode and the traditional LTO electrode, the electrochemical behavior of different electrodes is studied. The results show that plasma spraying can prepare an amorphous Li 4 Ti 5 O 12 electrode coating of about 8 μm. After 200 electrochemical cycles, the structure of the electrode evolved, and the inside of the electrode fractured and cracks expanded, because of recrystallization at the interface between the rich fluorine compounds and the amorphous LTO electrode. Similarly, the ceramic/polymer composite electrolyte has undergone structural evolution after 200 cycles test. The electrochemical cycle results show that the cycle stability, capacity retention rate, coulomb efficiency, and internal impedance of amorphous LTO electrodes are better than traditional LTO electrode. This innovative and facile quasi-solid-state strategy is aimed to promote the intrinsic safety and stability of working lithium battery, shedding light on the development of next-generation high-performance solid-state lithium batteries.

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“…[25][26][27][28] Polyester with a low glass transition temperature (T g ) and melting temperature is a kind of polymers with good biocompatibility and easy degradability, [29][30][31][32] which is widely used in biomedicine and self-assembly fields. [33][34][35][36] When applied to the field of SPEs, the polyester-based electrolyte possesses a wider electrochemically stable window and higher lithium-ion transference number, [37][38][39][40][41][42] which is a very promising material and is expected to replace PEO-based SPEs. It noted to be pointed out that polyester has a similar thermal property and semi-crystallinity to PEO.…”

Section: Introductionmentioning

confidence: 99%

One-Pot Synthesis of Polyester-Based Linear and Graft Copolymers for Solid Polymer Electrolytes

Guo

Gong

et al. 2022

CCS Chem

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“Polymer-in-ceramic” based poly(Ɛ-caprolactone)/ceramic composite electrolyte for all-solid-state batteries

Cited by 47 publications

References 53 publications

Garnet-Poly(ε-caprolactone-co-trimethylene carbonate) Polymer-in-Ceramic Composite Electrolyte for All-Solid-State Lithium-Ion Batteries

Garnet-Poly(ε-caprolactone-co-trimethylene carbonate) Polymer-in-Ceramic Composite Electrolyte for All-Solid-State Lithium-Ion Batteries

Structural evolution of plasma sprayed amorphous Li4Ti5O12 electrode and ceramic/polymer composite electrolyte during electrochemical cycle of quasi-solid-state lithium battery

One-Pot Synthesis of Polyester-Based Linear and Graft Copolymers for Solid Polymer Electrolytes

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