Bioinspired Separator with Ion-Selective Nanochannels for Lithium Metal Batteries

Yi Chen; Philip Mickel; Huijie Pei; Yingfeng Wen; Xin Guan; Yun Wang; Xuyang Wang; Omar Al Mhtachem; Cheng Zhang; Hui Nie; Xingping Zhou; Petr Kral; Xiaolin Xie

doi:10.1021/acsami.3c01311

journal article·2023-04-12

Bioinspired Separator with Ion-Selective Nanochannels for Lithium Metal Batteries

Yi Chen, Philip Mickel, Huijie Pei, Yingfeng Wen, Xin Guan, Yun Wang, Xuyang Wang, Omar Al Mhtachem, Cheng Zhang, Hui Nie, Xingping Zhou, Petr Kral, Xiaolin Xie

ACS Applied Materials & Interfaces· Volume 15· Issue 14

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Source abstract

Abstract

The free transport of anions through commercial polyolefin separators used in lithium metal batteries (LMBs) gives rise to concentration polarization and rapid growth of lithium dendrites, leading to poor performance and short circuits. Here, a new poly(ethylene- co -acrylic acid) (EAA) separator with functional active sites (i.e., carboxyl groups) distributing along the pore surface was fabricated, forming bioinspired ion-conducting nanochannels within the separator. As the carboxyl groups effectively desolvated Li + and immobilized anion, the as-prepared EAA separator selectively accelerated the transport of Li + with transference number of Li + ( t Li + ) up to 0.67, which was further confirmed by molecular dynamics simulations. The battery with the EAA separator can be stably cycled over 500 h at 5 mA cm –2 . The LMBs with the EAA separator have exceptional electrochemical performance of 107 mAh g –1 at 5 C and a capacity retention of 69% after 200 cycles. This work provides new commercializable separators toward dendrite-free LMBs.

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Research context

Energy storage Nanomaterials

OpenAlex topics: Advanced Battery Materials and Technologies · Advancements in Battery Materials · Chemical Synthesis and Characterization

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China

Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607, United States

Australian Institute for Bioengineering and Nanotechnology and ARC Centre of Excellence in Convergent Bio-Nano Science and Technology, The University of Queensland, Brisbane, Queensland 4072, Australia

Department of Chemistry and Departments of Physics, Pharmaceutical Sciences, and Chemical Engineering, University of Illinois at Chicago, Chicago, Illinois 60607, United States

Funding

National Health and Medical Research Council · Central University Basic Research Fund of China · Australian Research Council · National Natural Science Foundation of China · Innovation and Talent Recruitment Base of New Energy Chemistry and Device

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