Polydopamine Doped Hexagonal Boron Nitride Coating Separator With Excellent Heat Resistance and Wettability for High-Performance Lithium Metal Batteries
Corresponding Author
Haihua Wang
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Xi'an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xi'an, P. R. China
Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an, P. R. China
Correspondence:
Haihua Wang ([email protected])
Contribution: Funding acquisition (lead), Project administration (lead), Supervision (lead), Writing - review & editing (lead)
Search for more papers by this authorJie Wang
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Data curation (lead), Formal analysis (lead), Investigation (lead), Methodology (lead), Writing - original draft (lead)
Search for more papers by this authorHuizhu Niu
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Data curation (supporting), Formal analysis (supporting)
Search for more papers by this authorRui Cao
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Data curation (supporting), Investigation (supporting)
Search for more papers by this authorKeWei Shu
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Xi'an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xi'an, P. R. China
Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an, P. R. China
Contribution: Funding acquisition (lead), Writing - review & editing (lead)
Search for more papers by this authorChaoxian Chen
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
School of Materials Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing, P. R. China
Contribution: Writing - review & editing (lead)
Search for more papers by this authorWei Yuan
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Supervision (supporting)
Search for more papers by this authorXiaoSong Li
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Formal analysis (supporting), Supervision (supporting)
Search for more papers by this authorYun Han
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Supervision (supporting)
Search for more papers by this authorJiaheng Li
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Formal analysis (supporting), Supervision (supporting)
Search for more papers by this authorXinyu Shang
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Formal analysis (supporting)
Search for more papers by this authorCorresponding Author
Haihua Wang
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Xi'an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xi'an, P. R. China
Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an, P. R. China
Correspondence:
Haihua Wang ([email protected])
Contribution: Funding acquisition (lead), Project administration (lead), Supervision (lead), Writing - review & editing (lead)
Search for more papers by this authorJie Wang
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Data curation (lead), Formal analysis (lead), Investigation (lead), Methodology (lead), Writing - original draft (lead)
Search for more papers by this authorHuizhu Niu
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Data curation (supporting), Formal analysis (supporting)
Search for more papers by this authorRui Cao
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Data curation (supporting), Investigation (supporting)
Search for more papers by this authorKeWei Shu
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Xi'an Key Laboratory of Advanced Performance Materials and Polymers, Shaanxi University of Science and Technology, Xi'an, P. R. China
Shaanxi Key Laboratory of Chemical Additives for Industry, Shaanxi University of Science and Technology, Xi'an, P. R. China
Contribution: Funding acquisition (lead), Writing - review & editing (lead)
Search for more papers by this authorChaoxian Chen
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
School of Materials Science and Engineering, and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing, P. R. China
Contribution: Writing - review & editing (lead)
Search for more papers by this authorWei Yuan
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Supervision (supporting)
Search for more papers by this authorXiaoSong Li
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Formal analysis (supporting), Supervision (supporting)
Search for more papers by this authorYun Han
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Supervision (supporting)
Search for more papers by this authorJiaheng Li
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Formal analysis (supporting), Supervision (supporting)
Search for more papers by this authorXinyu Shang
Shaanxi University of Science and Technology, School of Chemistry and Chemical Engineering, Xi'an, Shaanxi, P. R. China
Contribution: Formal analysis (supporting)
Search for more papers by this authorFunding: This study was supported by the National Natural Science Foundation of China, No. 21978164, 22078189, 22105120. Outstanding Youth Science Fund of Shaanxi Province, No. 2021JC-046. Innovation Support Program of Shaanxi Province, 2021JZY-001. Key Research and Development Program of Shaanxi Province, No. 2020GY-243. Special Research Fund of Education Department of Shaanxi, No. 20JK0535. National High-end Foreign Expert Project, No. GDW20186100428. Key Research and Development Projects of Shaanxi Province, No.2024SF2-GJHX-19.
ABSTRACT
The uneven porous structure of commercial polypropylene (PP) separators leads to non-uniform lithium deposition in lithium metal batteries. This non-uniform deposition promotes the growth of lithium dendrites, which can penetrate the separator, causing internal short circuits and posing significant safety risks. In this work, polydopamine (PDA), which is capable of undergoing self-polymerization, was introduced into h-BN. The two components formed a conjugated molecular structure through π-π interactions, providing enhanced mechanical strength and thermal stability. Subsequently, the PDA-h-BN composite (PB) was coated onto the surface of commercial PP separators to fabricate a novel composite separator (PP-PB). The modified PP-PB separator exhibits excellent thermal stability, electrolyte wettability, and mechanical strength, ensuring uniform heat distribution and acting as a robust barrier against lithium dendrite penetration. Furthermore, the Li/PP-PB/Li cell demonstrated stable cycling for over 1000 h at 1 mA·cm−2 and 0.5 mAh·cm−2. Similarly, the Li/PP-PB/Cu cell maintained a coulombic efficiency (CE) of 98.5% after 200 cycles at 0.5 mA·cm−2. The PP-PB separator ensures uniform lithium deposition and effectively suppresses the formation of lithium dendrites. Additionally, the Li/PP-PB/LFP battery retained a capacity of 158.6 mAh·g−1 with a capacity retention rate of 98.75% after 900 cycles at 1 C, demonstrating superior cycling stability and (CE) compared to the PP-based battery (120 mAh·g−1, 85.7%). This study provides valuable insights for advancing the development of lithium metal batteries.
Conflicts of Interest
The authors declare no conflicts of interest.
Open Research
Data Availability Statement
Data will be made available on request.
Supporting Information
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