LIB separators and the recent technical progress

doi:10.3969/j.issn.2095-4239.2016.02.002

Abstract

Abstract: Lithium-ion-battery (LIB) separators and their properties which affect the LIB's performance were introduced. The hot spots, safety related properties, new materials, ceramic coating and high wettability in LIB separators research were summarized. The technical requirements for LIB separators by sorting the LIB into two types (3 C battery and power battery) are also discussed. It is noted that 3C LIB separators need to have thinner thickness, higher porosity, higher heat resistance and better uniformity, while power LIB focus on increasing the energy density, expanding the electrochemical stability, enhancing the resistance to high voltage. The main progress in LIB separators' research were reviewed from the following four aspects: polyolefin modification, polyolefin-ceramic composite separator, new material systems and new process methods. Finally, the authors analyzed the status of separator industry in China, and suggested that more attention should be paid to independent research on technology and processes to ensure the quality of products with increasing of the productivity.

Key words: LIB separator, modification, ceramic coating, new materials, high security

CLC Number:

TM912.9

WANG Chang, WU Dayong. LIB separators and the recent technical progress[J]. Energy Storage Science and Technology, 2016, 5(2): 120-128.

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