Effective method to simultaneously release residual stress and promote planarization of surface indentation achieved by secondary indentation

Ma, Zhichao; Jiang, Dongying; Zhao, Hongwei; Qiang, Zhenfeng; Zhang, Zhihui; Liu, Dongni; Liu, Ren

doi:10.1016/j.apsusc.2019.144712

Cited by 6 publications

(1 citation statement)

References 33 publications

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“…As seen from the XRD patterns shown in Figure 8, the black, red, and blue curves represent the XRD patterns of separator specimens subjected to temperature shifts of 0, −40, and 40 °C, respectively. For the final steady-state temperature of 20 °C in all cases, the XRD patterns of the separator specimen subjected to a temperature shift of −40 °C exhibited enhanced diffraction intensities and significantly different diffraction angles, which indicated that the residual stress 51 induced by the cooling process might affect the crystallinity. Meanwhile, the XRD patterns of the separator specimens subjected to temperature shifts of 0 and 40 °C exhibit consistent diffraction peaks with corresponding diffraction angles.…”

Section: Crystallographic Evolution Of Separatorsmentioning

confidence: 94%

Temperature-Shift-Induced Mechanical Property Evolution of Lithium-Ion Battery Separator Using Cyclic Nanoindentation

Wang

Zhao

et al. 2022

ACS Appl. Mater. Interfaces

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The evolution of mechanical properties of separators affected by temperature shifts is imperative for the performance of the lithium-ion battery. The flexible film characteristics hinder the evaluation of the micromechanical properties of separators. In the present study, considering the susceptibility of separators to temperature fluctuations, the temperature distribution of the battery during the discharging process at subzero temperature is obtained. Three sets of separator samples subjected to various temperature shifts are prepared. Through multicycle depth-sensitive nanoindentation, the temperature-dependent weakening of elastic modulus and hardness of separators is experimentally verified. Moreover, the variation trends of elastic modulus, hardness, and hysteresis response of the separator specimens in terms of temperature are investigated via extracting from the multicycle loading–unloading nanoindentation responses. The temperature-dependent variations in the elastic modulus of the separator were investigated by following heating, cooling, and thermostatic processes. Meanwhile, the indentation tests also verify that the effect of temperature shifts on the hardness exhibits an attenuation trend when heating or cooling is followed by a thermostatic process. The variation analysis of nanoindentation hardness as a function of temperature shifts shows typical size effects dependent on the nanoindentation depth. The temperature-induced residual stress and elemental distribution are also analyzed through characterization using X-ray diffraction and energy-dispersive X-ray spectroscopy, respectively. The obtained evolution law of temperature shift-induced mechanical properties of a separator could facilitate the optimal design of the separators and provide the supporting data to enhance the safety performance of lithium-ion batteries.

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Section: Crystallographic Evolution Of Separatorsmentioning

confidence: 94%

Temperature-Shift-Induced Mechanical Property Evolution of Lithium-Ion Battery Separator Using Cyclic Nanoindentation

Wang

Zhao

et al. 2022

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

Determining the constitutive behavior of nonlinear visco-elastic-plastic PMMA thin films using nanoindentation and finite element simulation

Chen

et al. 2021

Materials & Design

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Regulation of microstructure and physical properties of Tb-Dy-Fe-Cu alloys by doping with transition elements

Xiao

et al. 2022

Materials & Design

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Effective method to simultaneously release residual stress and promote planarization of surface indentation achieved by secondary indentation

Cited by 6 publications

References 33 publications

Temperature-Shift-Induced Mechanical Property Evolution of Lithium-Ion Battery Separator Using Cyclic Nanoindentation

Temperature-Shift-Induced Mechanical Property Evolution of Lithium-Ion Battery Separator Using Cyclic Nanoindentation

Determining the constitutive behavior of nonlinear visco-elastic-plastic PMMA thin films using nanoindentation and finite element simulation

Regulation of microstructure and physical properties of Tb-Dy-Fe-Cu alloys by doping with transition elements

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