High-safety separators for lithium-ion batteries and sodium-ion batteries: advances and perspective

Zhang, Lupeng; Li, Xinle; Yang, Mingrui; Chen, Weihua

doi:10.1016/j.ensm.2021.06.033

Cited by 305 publications

(155 citation statements)

References 211 publications

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“…A prominent separator should possess a pore size that is big enough for the lithium ions to pass through while small enough so that all the active components and dendrite growths in the electrode can be cut off to avoid short circuits. [8] Uniform pore size distribution is also critical because it ensures uniform current density between electrodes and separator, hindering performance declines and dendrite growth.…”

Section: Thickness Porosity and Mean Pore Sizementioning

confidence: 99%

Advanced separators for lithium-ion batteries

Chen

Zhan

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The separator technology is a major area of interest in lithium-ion batteries (LIBs) for high-energy and high-power applications such as portable electronics, electric vehicles and energy storage for power grids. Separators play an essential part that physically prevents direct contact between positive and negative electrodes while acting as an electrolyte reservoir to transport lithium ions. The characteristics of different separators would directly affect the performance under cell abuse; hence separators are crucial for battery safety. This paper introduces the characteristics of separators, means to improve traditional commercial polymeric separators and novel materials for separators. Other novel high-performance separators are also briefly discussed in this paper. Insights from this paper illustrate that various strategies could enhance the performance of separators, and better performance and safety can be achieved in separators in high-energy lithium-ion batteries.

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Section: Thickness Porosity and Mean Pore Sizementioning

confidence: 99%

Advanced separators for lithium-ion batteries

Chen

Zhan

2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…In addition, the poor thermostability of polyole n separators would cause internal shortcircuits at elevated temperatures and eventually lead to the explosion of LIBs (Cha et al 2018;Waqas et al 2019). Therefore, considerable efforts have been made to develop advanced separators that can satisfy the increasing demand of high-performance LIBs (Zhang et al 2021a).…”

Section: Introductionmentioning

confidence: 99%

Aramid Nanofibers Reinforced Cellulose Paper-Based Lithium-Ion Battery Separator with Improved Safety and Cycling Stability

Zhang

Luo

et al. 2021

Preprint

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Commercial polyolefin separators with poor electrolyte wettability and inferior thermal stability have hampered the development of advanced lithium-ion batteries (LIBs) due to their unsatisfied electrochemical performance and severe safety hazards. Herein, a novel paper-based composite separator composed of electrolyte-affinitive cellulose fibers (CFs) and thermally stable aramid nanofibers (ANFs) was successfully fabricated through the traditional papermaking method. It was found that the incorporation of ANFs played crucial roles in improving the defects of pure CF separator such as large-sized pores, low mechanical strength and high flammability. Specifically, the CF/ANF composite separator with 20 wt.% ANFs (CF/ANF-20) possessed narrow micropores, satisfied tensile strength (33MPa), excellent thermal resistance (without dimensional shrinkage up to 200 °C) and flame retardancy, greatly enhancing the safe operation of battery. In addition, benefiting from the highly porous structure and exceptional electrolyte affinity of CF separator, the CF/ANF-20 composite separator exhibited appropriate porosity and superior electrolyte wettability, which brought about a high electrolyte uptake (157%), thus endowing it with better ionic conductivity (0.75 mS cm−1) and lower interfacial resistance than that of commercial polypropylene (PP) separator. Accordingly, the LiFePO4/Li half cells using CF/ANF-20 separator delivered outstanding rate capability and stable cycling performance. All results indicate that the CF/ANF-20 separator with great balance between the electrochemical performance and safety is an intriguing candidate for advanced LIBs.

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“…A lot of efforts were directed to the development of more advanced batteries. For example, different approaches for LIB's development were used, such as nanostructured materials [1][2][3][4][5][6][7][8][9][10][11][12][13], the growth of the capacity and voltage of cathode materials [14][15][16][17][18][19][20][21][22][23][24][25][26][27][28][29][30], hollow and porous and structures [13,[31][32][33][34][35][36][37][38][39][40][41][42][43][44], safety issues, including separator and liquid electrolyte studies [45][46][47][48]…”

Section: Introductionmentioning

confidence: 99%

Synthesis Method and Thermodynamic Characteristics of Anode Material Li3FeN2 for Application in Lithium-Ion Batteries

Popovich

Новиков

Wang³

et al. 2021

Materials

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Li3FeN2 material was synthesized by the two-step solid-state method from Li3N (adiabatic camera) and FeN2 (tube furnace) powders. Phase investigation of Li3N, FeN2, and Li3FeN2 was carried out. The discharge capacity of Li3FeN2 is 343 mAh g−1, which is about 44.7% of the theoretic capacity. The ternary nitride Li3FeN2 molar heat capacity is calculated using the formula Cp,m = 77.831 + 0.130 × T − 6289 × T−2, (T is absolute temperature, temperature range is 298–900 K, pressure is constant). The thermodynamic characteristics of Li3FeN2 have the following values: entropy S0298 = 116.2 J mol−1 K−1, molar enthalpy of dissolution ΔdHLFN = −206.537 ± 2.8 kJ mol−1, the standard enthalpy of formation ΔfH0 = −291.331 ± 5.7 kJ mol−1, entropy S0298 = 113.2 J mol−1 K−1 (Neumann–Kopp rule) and 116.2 J mol−1 K−1 (W. Herz rule), the standard Gibbs free energy of formation ΔfG0298 = −276.7 kJ mol−1.

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High-safety separators for lithium-ion batteries and sodium-ion batteries: advances and perspective

Cited by 305 publications

References 211 publications

Advanced separators for lithium-ion batteries

Advanced separators for lithium-ion batteries

Aramid Nanofibers Reinforced Cellulose Paper-Based Lithium-Ion Battery Separator with Improved Safety and Cycling Stability

Synthesis Method and Thermodynamic Characteristics of Anode Material Li3FeN2 for Application in Lithium-Ion Batteries

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