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A pore-controllable polyamine (PAI) layer-coated polyolefin (PE) separator for pouch lithium-ion batteries with enhanced safety

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Abstract

A series of pore-controllable polyamine (PAI) layer-coated polyolefin (PE) separators (PAI-PE-1, PAI-PE-2, and PAI-PE-3) are prepared by using a phase-transfer and gravure-printing method and used to improve the safety of pouch lithium-ion batteries (LIBs) based on a PAI “guest-host transition” and PE “pore on-off” cooperative strategy. And the safety mechanism for the LIBs using PAI-PE-1, PAI-PE-2, and PAI-PE-3 separators with pore sizes of approximately 0.02, 0.17, and 0.85 μm is discussed. In the overcharge, nail, and hot box tests, the LIBs with PAI-PE separators all meet safety requirements, while the LIBs with PE separators exhibit either fire or smoke issues. The LIBs with PAI-PE-1 separators have the lowest temperature of 102 °C and the highest residual voltage of 3.97 V in the nail and hot box tests, respectively, and the LIBs with PAI-PE-3 separators have the lowest temperature of 129 °C in the overcharge test. The mechanism for the enhanced safety of LIBs with PAI-PE separators is ascribed to a PAI “guest-host transition” and PE “pore on-off” cooperative process. These results indicate that this pore-controllable PAI-PE separator has promising prospects in the application of LIBs with enhanced safety requirements.

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Funding

This work was financially supported by the Scientific and Technological Plan Projects of Guangzhou City (No. 201902010068) and Zhuhai City (No. ZH01084702180037HJL), Peoples Republic of China.

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Authors and Affiliations

  1. School of Chemistry, South China Normal University, College town, Guangzhou, 510006, People’s Republic of China

    Zheng Wang, Jiaxin Chen, Bingyu Ye, Peipei Pang, Zhen Ma, Hongyu Chen & Junmin Nan

  2. TWS Technology (Guangzhou) Limited, Guangzhou, 510006, People’s Republic of China

    Zheng Wang

  3. Nanwu Technology (Guangzhou) Co., Ltd., Guangzhou, 510520, People’s Republic of China

    Zhen Ma

Authors
  1. Zheng Wang
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  2. Jiaxin Chen
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  3. Bingyu Ye
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  4. Peipei Pang
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  5. Zhen Ma
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  6. Hongyu Chen
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  7. Junmin Nan
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Correspondence to Hongyu Chen or Junmin Nan.

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Wang, Z., Chen, J., Ye, B. et al. A pore-controllable polyamine (PAI) layer-coated polyolefin (PE) separator for pouch lithium-ion batteries with enhanced safety. J Solid State Electrochem 24, 843–853 (2020). https://doi.org/10.1007/s10008-019-04488-y

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  • DOI: https://doi.org/10.1007/s10008-019-04488-y

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