Simultaneously adjusting deformation and heat using a negative thermal expansion material to enhance electrochemical performance and safety of lithium-ion batteries

Wang, Mengyao; Wei, Yijun; Xu, Sheng; Jing, Nana; Hao, Huming; Yang, Lianrui; Wang, Zhiqiang; Wang, Guixin

doi:10.1016/j.cej.2021.131434

Cited by 12 publications

(14 citation statements)

References 42 publications

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“…Insufficient coupling of heat and deformation at inappropriate addition levels results in sub-optimal performance. Less LiAlSiO 4 is not enough to adjust heat and deformation as well as improve the interface, while more LiAlSiO 4 will tremendously reduce the conductivity and active sites of the Si electrode besides the possible abnormal shrinkage, causing large deformation and damaged interface. , Therefore, 3 wt % LiAlSiO 4 is the optimum addition to improve the electrochemical performance of Si, and the pure Si and SL3 samples are chosen for further analysis.…”

Section: Resultsmentioning

confidence: 99%

“…Negative thermal expansion (NTE) materials have unique properties of shrinking rather than expanding in volume when heated, 36 which is of great significance for declining the internal thermal damage and buffering the volume change of batteries. Our previous work proposed the modification of silicon, 37 T h i s c o n t e n t i s NCM811, 38 NCM622, 39 and NCA 40 using the NTE material ZrW 2 O 8 with surprising enhancement. However, the low ionic conductivity (<10 −9 S•cm −1 ) of ZrW 2 O 8 restricts the diffusion of lithium ions, and the complex preparation process and high cost of ZrW 2 O 8 are not conducive to extensive applications.…”

Section: ■ Introductionmentioning

confidence: 99%

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Decreasing Deformation and Heat as Well as Intensifying Ionic Transport of Si Using a Negative Thermal Expansion Ceramic with High Ionic Conductivity

Wang

Hao

Luo

et al. 2022

Ind. Eng. Chem. Res.

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Silicon is an attractive anode material with high capacity, but its application is hampered by some problems such as severe volume change, low ionic migration ability, thermal runaway, and capacity fade. Herein, a facile way was proposed to alleviate deformation and improve ionic transport and thermal stability of nanoscaled Si by in situ absorbing heat using a negative thermal expansion ceramic of LiAlSiO4 with high ionic conductivity. The Si modified with 3 wt % LiAlSiO4 (SL3) exhibits the best electrochemical performance, and the specific discharge capacities can retain 777.4 and 464.3 mAh g–1 after 100 cycles at 25 and 60 °C at 2 A g–1, respectively, about 239.6 and 256.6% higher than those of Si. The value can reach 807.8 mAh g–1 at 4 A g–1, about 79.0% higher than that of Si. Compared to those of the Si, the strain, R ct, and heat from DSC of SL3 are reduced by approximately 67.5, 34.0, and 65.6%, respectively, while the lithium-ion diffusion coefficient is increased by ∼192.4%. According to the abundant results at different states, enhancement mechanisms were discussed. This strategy offers a novel perspective for improving the electrochemical performance and safety of energy materials via adjusting heat, deformation, ionic diffusion, and interface.

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Section: Resultsmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Decreasing Deformation and Heat as Well as Intensifying Ionic Transport of Si Using a Negative Thermal Expansion Ceramic with High Ionic Conductivity

Wang

Hao

Luo

et al. 2022

Ind. Eng. Chem. Res.

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“…Nondestructive strain−stress tests were adopted to evaluate the deformation of the electrodes during cycles, and strain gauges (Zhonghang Electronic Measurement Instrument Co. Ltd., China) were tightly attached to the center of the surface of the stainlesssteel shell to reflect the inner stress−strain changes using a DH3821 strain equipment (Donghua Testing Technology Co. Ltd.). 38 The electrochemical performance and stress−strain were simultaneously monitored to reveal the relationship between the potential and strain during the cycles.…”

Section: ■ Experimental Sectionmentioning

confidence: 99%

Preventing Structural Collapse and Thermal Runaway to Improve the Electrochemical Performance and Safety of LiNi_0.8Co_0.1Mn_0.1O₂ by a Negative-Thermal-Expansion Material of Al₂(WO₃)₄

Lou

Xie

Luo

et al. 2022

Ind. Eng. Chem. Res.

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Nickel-rich layered oxides such as LiNi0.8Co0.1Mn0.1O2 (NCM811) deliver high specific capacity and attract extensive interest for applications, but they still face some challenges of capacity fade and thermal runaway. Herein, NCM811 was modified with a cheap orthorhombic negative-thermal-expansion (NTE) material of Al2(WO3)4 to improve its electrochemical performance and safety by adjusting the heat, deformation, and interface via a simple strategy. The NCM811 material modified with 7 wt % Al2(WO3)4 (NA7) exhibits excellent electrochemical performance, thermal stability, and safety. Its reversible capacities can retain 162.0 and 171.5 mA h g–1 after 100 cycles at 25 and 60 °C, respectively, about 13.8 and 25.4% higher than those of the pristine NCM811. Simultaneously, the strain value after cycles and released heat from differential scanning calorimetry of NCM811 are decreased by Al2(WO3)4 about 50.6 and 45.3%, respectively. With the modification of Al2(WO3)4, the exothermic peak of NCM811 is up-shifted from 206.1 to 223.8 °C, while the side reaction, morphology breakdown, and structural damage are significantly prevented. According to multifarious results using various techniques, the enhancement mechanism of Al2(WO3)4 for NCM811 is proposed. It supplies a facile strategy to improve the performance and safety of energy materials using a cheap NTE material.

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“…Recently, the 3D printing technology [ 1 ], robot software organization [ 2 , 3 ], self-healing display screen [ 4 ], wearable electronic materials and battery expansion deformation are promoted [ 5 , 6 ]. These materials have a common deformation of porous materials deformation, followed by deformation related to temperature [ 7 , 8 , 9 , 10 ].…”

Section: Introductionmentioning

confidence: 99%

A Dynamic Thermal-Mechanical Coupling Numerical Model to Solve the Deformation and Thermal Diffusion of Plates

2022

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Elastic materials include metal plates, rubber, foam, airbags and so on, which have a good buffer effect, toughness and strong recovery ability. In this paper, the deformation and thermal diffusion of 2D and 3D thin plates are studied. Two models are established for the deformation of 2D thin plates. The bending deformation equation of rectangular and circular plates is derived, and the semi-analytical solution of the deflection function w(x,y) is found through the Fourier series approximation in the polar coordinate. The consistencies of the numerical solution and the theoretical solution are verified by numerical method. Then, we find that the factors affecting the deformation are related to the Young’s modulus, load, plate length and deformation factor α of the material. In a separate temperature physics field, we establish a heat conduction model of 2D graphene film. Three numerical schemes of the transient heat conduction equation of FDM-FEM are given. In contrast, this paper uses the implicit Euler method to discrete the time term. Furthermore, we compared the difference between the adiabatic condition and the convection condition by the graphical method and the curve trend. The results show that the temperature near the adiabatic boundary is higher. Finally, we proposed a 3D dynamic thermal–mechanical coupling model (3D-DTMCM) that has been established. A laser heating monocrystalline silicon sheet with periodic motion formula is given. The temperature radiation of the laser heat source has Gaussian distribution characteristics. Our proposed model can dynamically determine Young’s modulus with a variable temperature. The numerical results show that the higher the temperature is, the higher the strain energy density of the plate is. In addition, the deformation amplitude of the plates in the coupling field is larger than that in the single mechanical field. Finally, we also discussed the stress field distribution of mixed cracks under high temperature and high load. Our research provides theoretical support for the deformation of different plates, and also reflects the value of the coupled model in practical applications.

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Simultaneously adjusting deformation and heat using a negative thermal expansion material to enhance electrochemical performance and safety of lithium-ion batteries

Cited by 12 publications

References 42 publications

Decreasing Deformation and Heat as Well as Intensifying Ionic Transport of Si Using a Negative Thermal Expansion Ceramic with High Ionic Conductivity

Decreasing Deformation and Heat as Well as Intensifying Ionic Transport of Si Using a Negative Thermal Expansion Ceramic with High Ionic Conductivity

Preventing Structural Collapse and Thermal Runaway to Improve the Electrochemical Performance and Safety of LiNi_0.8Co_0.1Mn_0.1O₂ by a Negative-Thermal-Expansion Material of Al₂(WO₃)₄

A Dynamic Thermal-Mechanical Coupling Numerical Model to Solve the Deformation and Thermal Diffusion of Plates

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Simultaneously adjusting deformation and heat using a negative thermal expansion material to enhance electrochemical performance and safety of lithium-ion batteries

Cited by 12 publications

References 42 publications

Decreasing Deformation and Heat as Well as Intensifying Ionic Transport of Si Using a Negative Thermal Expansion Ceramic with High Ionic Conductivity

Decreasing Deformation and Heat as Well as Intensifying Ionic Transport of Si Using a Negative Thermal Expansion Ceramic with High Ionic Conductivity

Preventing Structural Collapse and Thermal Runaway to Improve the Electrochemical Performance and Safety of LiNi0.8Co0.1Mn0.1O2 by a Negative-Thermal-Expansion Material of Al2(WO3)4

A Dynamic Thermal-Mechanical Coupling Numerical Model to Solve the Deformation and Thermal Diffusion of Plates

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Product

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Preventing Structural Collapse and Thermal Runaway to Improve the Electrochemical Performance and Safety of LiNi_0.8Co_0.1Mn_0.1O₂ by a Negative-Thermal-Expansion Material of Al₂(WO₃)₄