Experimental and molecular simulating study on promoting electrolyte-immersed mechanical properties of cellulose/lignin separator for lithium-ion battery

Xie, Weigui; Dang, Yanping; Wu, Lin; Liu, Wangyu; Tang, Aimin; Luo, Yuanfang

doi:10.1016/j.polymertesting.2020.106773

Cited by 15 publications

(6 citation statements)

References 40 publications

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“…After fully absorbing the liquid electrolyte, the mechanical strength of both membranes is slightly reduced, but it can still meet the needs of practical applications. Especially, the gelled P(VdF-HFP)/PE membrane even shows a much larger elongation of 77.2% with a tensile strength of 126.0 MPa due to the better flexibility. , These results suggest that the short circuit problem is less likely to occur for the batteries assembled with the P(VdF-HFP)/PE separator.…”

Section: Resultsmentioning

confidence: 85%

Achieving a Highly Stable Electrode/Electrolyte Interface for a Nickel-Rich Cathode via an Additive-Containing Gel Polymer Electrolyte

Feng

Zhu

et al. 2022

ACS Appl. Mater. Interfaces

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The nickel-rich cathode LiNi0.8Co0.1Mn0.1O2 (NCM811) is deemed as a prospective material for high-voltage lithium-ion batteries (LIBs) owing to its merits of high discharge capacity and low cobalt content. However, the unsatisfactory cyclic stability and thermostability that originate from the unstable electrode/electrolyte interface restrict its commercial application. Herein, a novel electrolyte composed of a polyethylene (PE) supported poly(vinylidene fluoride-co-hexafluoropropylene) (P(VdF-HFP)) based gel polymer electrolyte (GPE) strengthened by a film-forming additive of 3-(trimethylsilyl)phenylboronic acid (TMSPB) is proposed. The porous structure and good oxidative stability of the P(VdF-HFP)/PE membrane help to expand the oxidative potential of GPE to 5.5 V compared with 5.1 V for the liquid electrolyte. The developed GPE also has better thermal stability, contributing to improving the safety performance of LIBs. Furthermore, the TMSPB additive constructs a low-impedance and stable cathode electrolyte interphase (CEI) on the NCM811 cathode surface, compensating for GPE’s drawbacks of sluggish kinetics. Consequently, the NCM811 cathode matched with 3% TMSPB-containing GPE exhibits remarkable cyclicity and rate capability, maintaining 94% of its initial capacity after 100 cycles at a high voltage range of 3.0–4.35 V and delivering a capacity of 133.5 mAh g–1 under 15 C high current rate compared with 68% and 75.8 mAh g–1 for the one with an additive-free liquid electrolyte. By virtue of the enhanced stability of the NCM811cathode, the cyclability of graphite||NCM811 full cell also increases from 48 to 81% after 100 cycles. The incorporation of P(VdF-HFP)-based GPE and TMSPB electrolyte additive points out a viable and convenient pathway to unlock the properties of high energy density and satisfactory safety for next-generation LIBs.

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Section: Resultsmentioning

confidence: 85%

Achieving a Highly Stable Electrode/Electrolyte Interface for a Nickel-Rich Cathode via an Additive-Containing Gel Polymer Electrolyte

Feng

Zhu

et al. 2022

ACS Appl. Mater. Interfaces

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“…It was verified that lignin positively affects the separator structure probably due to new hydrogen bonds created between cellulose and lignin molecules. [130] MD simulation on polyacrylic acid (PAA) has shown that the thermal conductivity of the separator increases with increasing polymer chain length elongation. [131] Also, discrete atomistic models at the molecular level, allowed to analyze the microstructure of the separator under different conditions such as in DMC, water, and vacuum, where the mechanical response depends on the interaction of the amorphous phase with the solvent.…”

Section: Theoretical Simulation Of Battery Separatorsmentioning

confidence: 99%

Overview on Theoretical Simulations of Lithium‐Ion Batteries and Their Application to Battery Separators

Miranda

Gonçalves

Wuttke

et al. 2023

Advanced Energy Materials

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For the proper design and evaluation of next‐generation lithium‐ion batteries, different physical‐chemical scales have to be considered. Taking into account the electrochemical principles and methods that govern the different processes occurring in the battery, the present review describes the main theoretical electrochemical and thermal models that allow simulation of the performance of lithium‐ion batteries, including different materials and components (electrodes and separators) and battery geometries. As the separator plays an essential role in the performance and safety of lithium‐ion batteries, the recent theoretical simulation work for this battery component are shown, with particular emphasis on morphology, dendrite growth, ionic transport, and mechanical properties. Further theoretical simulations and modeling of this battery component are still required for improving performance, taking into consideration varying geometric parameters such as pore size, porosity, and tortuosity as well as the optimization of the lithium diffusion process and ionic conductivity value. Theoretical simulations of battery separators will play an essential role in the new generation of lithium‐ion batteries, allowing the improvement of their performance while reducing experimental probes and time.

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“…Xie et al [ 47 ] successfully applied molecular simulation to unveil that the weakening of cellulose separator submerged in the electrolyte results from the deformed cellulose amorphous region and the promoting effect of adding lignin. The addition of lignin generates new hydrogen bonds between the cellulose and lignin molecules and subsequently form a larger fibrous network.…”

Section: Numerical Study Of Separatorsmentioning

confidence: 99%

“… Simulation results from Xie et al [ 47 ] ( a ) simulated Young’s modulus of molecular models under different environments, and distinct details in blended models: ( b ) deformed cellulose amorphous model in electrolyte solvents and ( c ) generated hydrogen bonds between cellulose and lignin molecules. …”

Section: Figurementioning

confidence: 99%

A Review on Lithium-Ion Battery Separators towards Enhanced Safety Performances and Modelling Approaches

Yuen

Wang

et al. 2021

Molecules

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In recent years, the applications of lithium-ion batteries have emerged promptly owing to its widespread use in portable electronics and electric vehicles. Nevertheless, the safety of the battery systems has always been a global concern for the end-users. The separator is an indispensable part of lithium-ion batteries since it functions as a physical barrier for the electrode as well as an electrolyte reservoir for ionic transport. The properties of separators have direct influences on the performance of lithium-ion batteries, therefore the separators play an important role in the battery safety issue. With the rapid developments of applied materials, there have been extensive efforts to utilize these new materials as battery separators with enhanced electrical, fire, and explosion prevention performances. In this review, we aim to deliver an overview of recent advancements in numerical models on battery separators. Moreover, we summarize the physical properties of separators and benchmark selective key performance indicators. A broad picture of recent simulation studies on separators is given and a brief outlook for the future directions is also proposed.

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Experimental and molecular simulating study on promoting electrolyte-immersed mechanical properties of cellulose/lignin separator for lithium-ion battery

Cited by 15 publications

References 40 publications

Achieving a Highly Stable Electrode/Electrolyte Interface for a Nickel-Rich Cathode via an Additive-Containing Gel Polymer Electrolyte

Achieving a Highly Stable Electrode/Electrolyte Interface for a Nickel-Rich Cathode via an Additive-Containing Gel Polymer Electrolyte

Overview on Theoretical Simulations of Lithium‐Ion Batteries and Their Application to Battery Separators

A Review on Lithium-Ion Battery Separators towards Enhanced Safety Performances and Modelling Approaches

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