Smart Separator Materials of Intrinsic Safe Lithium Battery for Large-scale Electric Energy Storge

doi:10.12096/j.2096-4528.pgt.22098

Abstract

Abstract:

In order to achieve the goal of “carbon peak, carbon neutrality” and build a safe, stable, green and low-carbon modern energy system, lithium-ion batteries have attracted much attention as a typical electrochemical energy storage device. How to ensure the safe and stable operation of the power stations has become the primary issue with the scale of newly installed capacity expanding. Therefore, from the perspective of cell materials, aiming at the existing problems of commercial lithium battery separators, the work of intelligent separators in recent years was reviewed, including the modification of polyolefin separator materials, the design of new intelligent separator structures and the development of high temperature resistant polymer materials. The importance of developing high-safety separator materials was emphasized. Finally, the future research on separators of liquid and solid batteries was prospected, in order to provide a reference for further optimization and design of high-safety energy storage materials.

Key words: energy storage power station, separator, safety, lithium-ion battery, thermal runaway, solid electrolyte

CLC Number:

TK 02

Shuaishuai YAN, Yang LU, Wenhui HOU, Kai LIU. Smart Separator Materials of Intrinsic Safe Lithium Battery for Large-scale Electric Energy Storge[J]. Power Generation Technology, 2022, 43(5): 792-800.

Figures/Tables 7

Fig. 1 Preparation process of TiO2-grafted PE separator

Fig. 2 Li metal deposition behavior with different separators

Fig. 3 Preparation process and working principle of separator loaded with LiNO3 additive

Fig. 4 Thermally-induced shutdown mechanism of battery separator loaded with paraffin@SiO2

Fig. 5 Smart electrospun separator with thermal-triggered flame-retardant properties

Fig. 6 Real-time voltage detection of bifunctional separator

Fig. 7 Thermal shrinkage behavior of PBI and Celgard 2400 at high temperature

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