Formation of hierarchically ordered structures in conductive polymers to enhance the performances of lithium-ion batteries

Tianyu Zhu, Hadas Sternlicht, Yang Ha, Chen Fang, Dongye Liu, Benjamin H. Savitzky, Xiao Zhao, Yanying Lu, Yanbao Fu, Colin Ophus, Chenhui Zhu, Wanli Yang, Andrew M. Minor and Gao Liu ()
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Tianyu Zhu: Lawrence Berkeley National Laboratory
Hadas Sternlicht: National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory
Yang Ha: Advanced Light Source, Lawrence Berkeley National Laboratory
Chen Fang: Lawrence Berkeley National Laboratory
Dongye Liu: National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory
Benjamin H. Savitzky: National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory
Xiao Zhao: University of California
Yanying Lu: Lawrence Berkeley National Laboratory
Yanbao Fu: Lawrence Berkeley National Laboratory
Colin Ophus: National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory
Chenhui Zhu: Advanced Light Source, Lawrence Berkeley National Laboratory
Wanli Yang: Advanced Light Source, Lawrence Berkeley National Laboratory
Andrew M. Minor: National Center for Electron Microscopy, The Molecular Foundry, Lawrence Berkeley National Laboratory
Gao Liu: Lawrence Berkeley National Laboratory

Nature Energy, 2023, vol. 8, issue 2, 129-137

Abstract: Abstract Electrically conductive polymers have found increasing applications in energy conversion and storage devices. In the conventional design of conductive polymers, organic functionalities are introduced via bottom-up synthetic approaches to enhance specific properties by modification of the individual polymers. Unfortunately, the addition of functional groups leads to conflicting effects, limiting their scaled synthesis and broad applications. Here we show a conductive polymer with simple primary building blocks that can be thermally processed to develop hierarchically ordered structures (HOS) with well-defined nanocrystalline morphologies. Our approach to constructing permanent HOS in conductive polymers leads to substantial enhancement of charge transport properties and mechanical robustness, which are critical for practical lithium-ion batteries. Finally, we demonstrate that conductive polymers with HOS enable exceptional cycling performance of full cells with high-loading micron-size SiOx-based anodes, delivering areal capacities of more than 3.0 mAh cm−2 over 300 cycles and average Coulombic efficiency of >99.95%.

Date: 2023
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DOI: 10.1038/s41560-022-01176-6

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